Re: loss of RX sensivity

[Pentti A J Pajunen]

Hi all!
I'm a member of some similar lists. Every time somebody asks for help of
some issue, the biggest count of "advices" distrace far away of the
original subject. Are U sure that zillions of ways how to tighten A
certain connector or wisdoms alike, are any real kinda solution.  Seems
that the real fact goes 2far OFF-TOPIC! To unveil, I have caught myself
undeliberately pressed the antenna selector swith, being too lazy to
read the display. Fortunatelly I havent (yet) dismantled any of my gear
to find the real reason. :-D

73 & CU
Penna OH2G


[hidden email] kirjoitti 18.09.2018 klo 21:45:

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> Today's Topics:
>
>     1. Re: loss of RX sensitivity (Walter Underwood)
>     2. Re: loss of RX sensitivity (Wes Stewart)
>     3. Re: loss of RX sensitivity (Wes Stewart)
>     4. Re: loss of RX sensitivity ([hidden email])
>     5. Re: loss of RX sensitivity (hawley, charles j jr)
>     6. KAT500 Antenna Grounding (Bob McGraw K4TAX)
>     7. Time Sync Program for Mac (Richard)
>     8. Re: Time Sync Program for Mac (John Stengrevics)
>     9. KPA-1500 and Remotehams.com (Peter Dougherty (W2IRT))
>    10. Re: Time Sync Program for Mac (Bob McGraw K4TAX)
>    11. Re: KAT500 Antenna Grounding (Wes Stewart)
>    12. Entertaining Tales (Bob DeHaney)
>    13. Re: KX3 encoder dying? (George Pasek)
>    14. Re: KAT500 Antenna Grounding (Bob McGraw K4TAX)
>    15. Re: loss of RX sensitivity (Dr. William J. Schmidt)
>    16. OT: Type N male pin movement (Ken G Kopp)
>    17. Re: loss of RX sensitivity ([hidden email])
>    18. K3/100-F Sold, P3F (Gene Sochor)
>    19. Re: KAT500 Antenna Grounding (Jim Brown)
>    20. P3 Panadapter (Don Schroder)
>    21. Re: P3 Panadapter (Don Wilhelm)
>    22. Re: loss of RX sensitivity (Wes Stewart)
>    23. Re: P3 Panadapter (George Thornton)
>    24. Re: P3 Panadapter (Fred Jensen)
>    25. Re: P3 Panadapter (Don Wilhelm)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 17 Sep 2018 16:45:10 -0700
> From: Walter Underwood <[hidden email]>
> To: "[hidden email]" <[hidden email]>
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> The next time someone challenges me on why I only use BNC and Type N connectors, I?m going to send them this entire discussion.
>
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
>
>> On Sep 17, 2018, at 4:41 PM, Don Wilhelm <[hidden email]> wrote:
>>
>> Andy,
>>
>> The PL259 to SO239 connector "end face" contact is provided only by pressure - it is not a sliding contact as you would find in a BNC or an N connector.  The pressure is provided only by the tightening of the threaded portion of the PL259.
>>
>> I ask you - just how much resistance can be expected if you just touch two ends of wires together without further positive contact?
>>
>> The "insulating spacer" is any oxidation on either the SO239 or the PL259.  That is why I like silver plated UHF connectors.  They may look a bit corroded, but the silver oxide is conductive even though it can appear brown or black.  If you are shopping for UHF connectors at hamfests, avoid all those nickel-plated ones that a not Amphenol, but flock to those that are oxidized, and silver plated with Mil Spec designations on them.
>>
>> 73,
>> Don W3FPR
>>
>> On 9/17/2018 6:39 PM, ANDY DURBIN wrote:
>>> " the threads of the PL259 are providing the only contact with the SO239"
>>> In the connectors that you are mating how do you prevent contact between the end face of the PL259 body and the end face of the SO239 body? You would need an insulating spacer for your statement to be true.
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 17 Sep 2018 16:46:28 -0700
> From: Wes Stewart <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> This is one of those, "it depends" situations.? Depending on the location of the
> two center conductor insulators in the plug and socket, the serrated (toothed)
> surface of the female connector might well contact the mating plug surface, if
> there is a gap between the insulators. In fact the "tighten it with pliers"
> crowd might actually be forcing this connection and mistakenly believing that
> they are improving the connection via the threads.
>
> Wes? N7WS
>
> On 9/17/2018 3:22 PM, Don Wilhelm wrote:
>> Chuck,
>>
>> That is true, but is ignoring the fact that the threads of the PL259 are
>> providing the only contact with the SO239.
>
> ------------------------------
>
> Message: 3
> Date: Mon, 17 Sep 2018 16:52:04 -0700
> From: Wes Stewart <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Pretty much my point made in another post.
>
> In fact, I often take a perverse view of these situations and ask myself, "Self,
> if you wanted to screw these two things together without the faces touching, how
> difficult would it be to do?"? And of course the answer is, almost impossible.
>
> Wes? N7ws
>
> On 9/17/2018 3:39 PM, ANDY DURBIN wrote:
>> " the threads of the PL259 are providing the only contact with the SO239"
>>
>>
>> In the connectors that you are mating how do you prevent contact between the end face of the PL259 body and the end face of the SO239 body? You would need an insulating spacer for your statement to be true.
>>
>>
>> 73,
>>
>> Andy k3wyc
>>
>>
>
>
> ------------------------------
>
> Message: 4
> Date: Mon, 17 Sep 2018 20:04:52 -0400 (EDT)
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID:
> <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> If you have a vector network analyzer you'll discover that BNC
> connectors aren't all that great at VHF and above, l oss and
> impedance vary with connector axial alignment because the bayonnet
> shell doesn't support aligh the connector body very well. Strain relief
> is extremely important with BNC connectors. TNC connectors are
> far superior but not widely used.
>
>
> While professionally installed N connectors have superb RF
> characteristics, all too often they're improperly installed -- even by
> professionals -- leading to damaged connectors if the male pin is
> misaligned, or unreliable contact if the pin or socket depth is just a
> few millimeters less than the manufacturers specification. I use
> only captive pin male N connectors, avoiding the most severe
> problems. I never use female N connectors on cables, the N sockets
> are much too fragile.
>
>
> Its hard to beat high quality silver plated UHF connectors at HF and
> 6 meters. But its important to use a tool to tighten them. That's a
> small price to pay for a very reliable connector.
>
>
> 73
> Frank
> W3LPL
>
>
>
> ----- Original Message -----
>
> From: "Walter Underwood" <[hidden email]>
> To: [hidden email]
> Sent: Monday, September 17, 2018 11:45:10 PM
> Subject: Re: [Elecraft] loss of RX sensitivity
>
> The next time someone challenges me on why I only use BNC and Type N connectors, I?m going to send them this entire discussion.
>
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
>
>> On Sep 17, 2018, at 4:41 PM, Don Wilhelm <[hidden email]> wrote:
>>
>> Andy,
>>
>> The PL259 to SO239 connector "end face" contact is provided only by pressure - it is not a sliding contact as you would find in a BNC or an N connector. The pressure is provided only by the tightening of the threaded portion of the PL259.
>>
>> I ask you - just how much resistance can be expected if you just touch two ends of wires together without further positive contact?
>>
>> The "insulating spacer" is any oxidation on either the SO239 or the PL259. That is why I like silver plated UHF connectors. They may look a bit corroded, but the silver oxide is conductive even though it can appear brown or black. If you are shopping for UHF connectors at hamfests, avoid all those nickel-plated ones that a not Amphenol, but flock to those that are oxidized, and silver plated with Mil Spec designations on them.
>>
>> 73,
>> Don W3FPR
>>
>> On 9/17/2018 6:39 PM, ANDY DURBIN wrote:
>>> " the threads of the PL259 are providing the only contact with the SO239"
>>> In the connectors that you are mating how do you prevent contact between the end face of the PL259 body and the end face of the SO239 body? You would need an insulating spacer for your statement to be true.
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
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> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
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>
> ------------------------------
>
> Message: 5
> Date: Tue, 18 Sep 2018 00:10:14 +0000
> From: "hawley, charles j jr" <[hidden email]>
> To: Walter Underwood <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset="Windows-1252"
>
> Trouble is I have to put adapters on the equipment and then go to bnc
>
> Chuck Jack
> KE9UW
>
> Sent from my iPhone, cjack
>
>> On Sep 17, 2018, at 6:46 PM, Walter Underwood <[hidden email]> wrote:
>>
>> The next time someone challenges me on why I only use BNC and Type N connectors, I?m going to send them this entire discussion.
>>
>> wunder
>> K6WRU
>> Walter Underwood
>> CM87wj
>> http://observer.wunderwood.org/ (my blog)
>>
>>> On Sep 17, 2018, at 4:41 PM, Don Wilhelm <[hidden email]> wrote:
>>>
>>> Andy,
>>>
>>> The PL259 to SO239 connector "end face" contact is provided only by pressure - it is not a sliding contact as you would find in a BNC or an N connector.  The pressure is provided only by the tightening of the threaded portion of the PL259.
>>>
>>> I ask you - just how much resistance can be expected if you just touch two ends of wires together without further positive contact?
>>>
>>> The "insulating spacer" is any oxidation on either the SO239 or the PL259.  That is why I like silver plated UHF connectors.  They may look a bit corroded, but the silver oxide is conductive even though it can appear brown or black.  If you are shopping for UHF connectors at hamfests, avoid all those nickel-plated ones that a not Amphenol, but flock to those that are oxidized, and silver plated with Mil Spec designations on them.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>>> On 9/17/2018 6:39 PM, ANDY DURBIN wrote:
>>>> " the threads of the PL259 are providing the only contact with the SO239"
>>>> In the connectors that you are mating how do you prevent contact between the end face of the PL259 body and the end face of the SO239 body? You would need an insulating spacer for your statement to be true.
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
> ------------------------------
>
> Message: 6
> Date: Mon, 17 Sep 2018 21:00:22 -0500
> From: Bob McGraw K4TAX <[hidden email]>
> To: Elecraft List <[hidden email]>
> Subject: [Elecraft] KAT500 Antenna Grounding
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> I didn't find the answer in the manual, so I'll ask here.?? I do see in
> the manual where bleed resistors are applied to the unused antenna
> terminals to bleed off static charges.? {page 15, Antenna
> Selector......... etc}
>
> My question, do the relays in the tuner take the center conductor of all
> three antenna terminals to ground when power is removed? I see that it
> switches to ANT 1 when power is off. ?? I suppose I could remove the
> covers and explore for myself, and I'll do just that if no one confirms
> one way or the other.?? Anyone have a schematic?? That would be nice.
>
>
> 73
>
> Bob, K4TAX
>
>
>
>
>
> ------------------------------
>
> Message: 7
> Date: Mon, 17 Sep 2018 22:13:46 -0400
> From: Richard <[hidden email]>
> To: Elecraft Reflector <[hidden email]>
> Subject: [Elecraft] Time Sync Program for Mac
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> What?s a good simple stand-alone application to keep my Mac?s clock razor sharp for FT8?
>
> I find that WSJT-X 1.8.0 is triggering my K3S? transmitter up to a full second late sometimes, typically 0.5 second late.
>
> Cheers!
> Richard ? W4KBX
>
> ------------------------------
>
> Message: 8
> Date: Mon, 17 Sep 2018 22:16:18 -0400
> From: John Stengrevics <[hidden email]>
> To: Richard <[hidden email]>
> Cc: Elecraft Reflector <[hidden email]>
> Subject: Re: [Elecraft] Time Sync Program for Mac
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> Richard,
>
> In System Preferences, input us.pool.ntp.org <http://us.pool.ntp.org/>
>
> Works fine for my Mac.
>
> 73,
>
> John
> WA1EAZ
>
>> On Sep 17, 2018, at 10:13 PM, Richard <[hidden email]> wrote:
>>
>> What?s a good simple stand-alone application to keep my Mac?s clock razor sharp for FT8?
>>
>> I find that WSJT-X 1.8.0 is triggering my K3S? transmitter up to a full second late sometimes, typically 0.5 second late.
>>
>> Cheers!
>> Richard ? W4KBX
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
>
> ------------------------------
>
> Message: 9
> Date: Mon, 17 Sep 2018 22:29:52 -0400
> From: "Peter Dougherty \(W2IRT\)" <[hidden email]>
> To: <[hidden email]>
> Subject: [Elecraft] KPA-1500 and Remotehams.com
> Message-ID: <000301d44ef7$7b8b1c70$72a15550$@net>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi all,
> I'd like to be able to use my KPA-1500 with Remotehams, but I'm not sure how
> to set this up. First off, the baud rate is limited in the RCFOrb server app
> to 115200, and secondly, I'm guessing I have to open a port somewhere??
>
> If the only way to do this is drop the baud rate on the KPA, what else will
> have to change in other software or with the K3s in order to communicate? I
> have the amp running on COM-14, and it is also on my LAN.
>
> Thanks in advance.
>
>  
>
>
> ----------------------------------------------------
>
> Regards,
> Peter Dougherty, W2IRT
>
> DXCC Card Checker/CQ-WAZ Checkpoint
>
> www.facebook.com/W2IRT
>
>  
>
>
>
> ------------------------------
>
> Message: 10
> Date: Mon, 17 Sep 2018 21:31:42 -0500
> From: Bob McGraw K4TAX <[hidden email]>
> To: Richard <[hidden email]>
> Cc: Elecraft Reflector <[hidden email]>
> Subject: Re: [Elecraft] Time Sync Program for Mac
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> I first suggest updating to the most current version of WSJT-X.
>
> On receiving FT8 signals, what is the DT time shown for most received signals?  Should be less than 1 second and typically less than 0.3 seconds.  If so there is nothing wrong with your computer time.
>
> Likely the delay is processing time, computer or interface or a TX delay set in the application.
>
> Bob, K4TAX
>
>
> Sent from my iPhone
>
>> On Sep 17, 2018, at 9:13 PM, Richard <[hidden email]> wrote:
>>
>> What?s a good simple stand-alone application to keep my Mac?s clock razor sharp for FT8?
>>
>> I find that WSJT-X 1.8.0 is triggering my K3S? transmitter up to a full second late sometimes, typically 0.5 second late.
>>
>> Cheers!
>> Richard ? W4KBX
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
>
>
> ------------------------------
>
> Message: 11
> Date: Mon, 17 Sep 2018 20:30:10 -0700
> From: Wes Stewart <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] KAT500 Antenna Grounding
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Unpowered, the input is connected to Ant 1.? Each output has a 1 meg resistor to
> ground, other than that just open relay contacts.
>
> Wes? N7WS.
>
>
>   ?On 9/17/2018 7:00 PM, Bob McGraw K4TAX wrote:
>> I didn't find the answer in the manual, so I'll ask here.?? I do see in the
>> manual where bleed resistors are applied to the unused antenna terminals to
>> bleed off static charges.? {page 15, Antenna Selector......... etc}
>>
>> My question, do the relays in the tuner take the center conductor of all three
>> antenna terminals to ground when power is removed? I see that it switches to
>> ANT 1 when power is off. ?? I suppose I could remove the covers and explore
>> for myself, and I'll do just that if no one confirms one way or the other.??
>> Anyone have a schematic?? That would be nice.
>>
>>
>> 73
>>
>> Bob, K4TAX
>>
>
>
> ------------------------------
>
> Message: 12
> Date: Tue, 18 Sep 2018 11:42:42 +0200
> From: "Bob DeHaney" <[hidden email]>
> To: <[hidden email]>
> Subject: [Elecraft] Entertaining Tales
> Message-ID: <001a01d44f33$f28277b0$d7876710$@gmx.net>
> Content-Type: text/plain; charset="utf-8"
>
> Guys, W4MLE (SK) was just trying to tell me that Propagation and Antennas will always be waiting to surprise me by functioning unexpectedly.
>
>  
>
> For instance, using a light bulb as a dummy load and having a QSO with the light bulb as my antenna.  Or calling CQ in the afternoon on 40m with 75 Watts into a low, more or less tuned dipole, and having I1ER come back to me as my very first Trans-Atlantic QSO.  I think that?s when the DX Bug bit me ?
>
>  
>
> Vy 73 de Bob DJ0RD/WU5T
>
>
>
> ------------------------------
>
> Message: 13
> Date: Tue, 18 Sep 2018 07:26:26 -0500
> From: "George Pasek" <[hidden email]>
> To: "Bob McGraw K4TAX" <[hidden email]>
> Cc: [hidden email]
> Subject: Re: [Elecraft] KX3 encoder dying?
> Message-ID: <CE6AAC7BB1CF4C3380261F867E4F77B7@JRPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> I opted to get a RSA number from Elecraft and ship it out to them.  I no
> longer have my workbench (or keen eyesight/steady soldering hand for that
> matter) so I really don't want taking a chance to do that type of work on
> something as expensive as the KX3.  I told them to replace all 4 of the
> small encorders and I should be good-to-go for many more years.
>
> George
> WD0AKZ
>
> -----Original Message-----
> From: Bob McGraw K4TAX
> Sent: Sunday, September 16, 2018 4:49 PM
> To: George Pasek
> Cc: [hidden email]
> Subject: Re: [Elecraft] KX3 encoder dying?
>
> Encoders can be cleaned. I've done it in several radios, several brands.  It
> is usually necessary to open the radio, remove the encoder.  Then carefully
> open the encoder, clean the wiper contacts and the stationary contacts with
> contact cleaner.   These are simply a stepping switch. Only one moving part.
> Reassemble in the reverse process.
>
> Bob, K4TAX
>
>
> Sent from my iPhone
>
>> On Sep 16, 2018, at 4:39 PM, George Pasek <[hidden email]> wrote:
>>
>> I noticed today that when I tried to fine adjust the mic level with the
>> mic/keyer/pwr encoder that it may display the mic level but won't change
>> it or if it does it's very erratic.  The response is the same with the
>> keyer speed in CW mode and when attempting to adjust the power level.
>> Turning the knob fast usually does nothing, turning it slow may move it a
>> bit and wiggling the knob seems the best way to see results.   I never had
>> a problem with it till today and I have made no changes to it or it's
>> operation.  I have been running it on WSPR at 500mw with a 2 minute Tx and
>> 8 minute Rx for a few weeks now and always tweak the mic gain for the
>> blinking ALC 5th bar when I change bands.  I'm assuming it's the encoder
>> going bad and will have to be sent to the Elecraft Hospital for a part
>> replacement surgery but I thought I'd check here first in case I'm missing
>> something.
>>
>> tnx
>> de George
>> WD0AKZ
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
>
>
>
> ------------------------------
>
> Message: 14
> Date: Tue, 18 Sep 2018 08:15:53 -0500
> From: Bob McGraw K4TAX <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] KAT500 Antenna Grounding
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Thanks Wes.???? I hesitated to un-stack the KPA500 off of the KAT500 and
> disconnect all the cables.??? I suppose I need to look at my
> configuration to reduce the likelihood of any damage to the PIN diodes
> in the KPA500.?? Lightning protection is good on the outside of the
> house but static discharge probably needs review.
>
> 73
>
> Bob, K4TAX
>
>
> On 9/17/2018 10:30 PM, Wes Stewart wrote:
>> Unpowered, the input is connected to Ant 1.? Each output has a 1 meg
>> resistor to ground, other than that just open relay contacts.
>>
>> Wes? N7WS.
>
>
>
> ------------------------------
>
> Message: 15
> Date: Tue, 18 Sep 2018 10:29:41 -0500
> From: "Dr. William J. Schmidt" <[hidden email]>
> To: "'Elecraft Reflector'" <[hidden email]>
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID: <01ed01d44f64$6b467310$41d35930$@wjschmidt.com>
> Content-Type: text/plain; charset="UTF-8"
>
>
> [[The next time someone challenges me on why I only use BNC and Type N connectors, I?m going to send them this entire discussion.]]
>
> Unfortunately this is not perfect either.  If you use an "N" connector on long runs of heliax in a cold climate, you must be aware that the coefficients of expansion of the center conductor and the shield can be different... and on several occasions, I have seen the center pin pull back from the connector (and essentially disconnect) because the center conductor contracted more than the shield.  Nb. This does not happen with all "N" connectors.  This is less of a problem with BNC connectors because the coax used is generally has a somewhat flexible shield.
>
>
>
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
>
>
> ------------------------------
>
> Message: 16
> Date: Tue, 18 Sep 2018 09:40:46 -0600
> From: Ken G Kopp <[hidden email]>
> To: "Dr. William J. Schmidt" <[hidden email]>, Elecraft
> <[hidden email]>
> Subject: [Elecraft] OT: Type N male pin movement
> Message-ID:
> <[hidden email]>
> Content-Type: text/plain; charset="UTF-8"
>
> UG-1185's have captive center pins to avoid this problem.
>
> Caution: There are two ways the Teflon spacers can be assembled.  The
> recessed sides face outward.
>
> 73 !
>
> K0PP
>
> On Tue, Sep 18, 2018, 09:30 Dr. William J. Schmidt <[hidden email]>
> wrote:
>
>> [[The next time someone challenges me on why I only use BNC and Type N
>> connectors, I?m going to send them this entire discussion.]]
>>
>> Unfortunately this is not perfect either.  If you use an "N" connector on
>> long runs of heliax in a cold climate, you must be aware that the
>> coefficients of expansion of the center conductor and the shield can be
>> different... and on several occasions, I have seen the center pin pull back
>> from the connector (and essentially disconnect) because the center
>> conductor contracted more than the shield.  Nb. This does not happen with
>> all "N" connectors.  This is less of a problem with BNC connectors because
>> the coax used is generally has a somewhat flexible shield.
>>
>>
>>
>>
>> ---
>> This email has been checked for viruses by AVG.
>> https://www.avg.com
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
> ------------------------------
>
> Message: 17
> Date: Tue, 18 Sep 2018 11:46:50 -0400 (EDT)
> From: [hidden email]
> To: Elecraft Reflector <[hidden email]>
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID:
> <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> Captivated pin N connectors completely resolve the problem of the
> center pin pulling back in cold weather.
>
>
> 73
> Frank
> W3LPL
>
>
> ----- Original Message -----
>
> From: "Dr. William J. Schmidt" <[hidden email]>
> To: "Elecraft Reflector" <[hidden email]>
> Sent: Tuesday, September 18, 2018 3:29:41 PM
> Subject: Re: [Elecraft] loss of RX sensitivity
>
>
> [[The next time someone challenges me on why I only use BNC and Type N connectors, I?m going to send them this entire discussion.]]
>
> Unfortunately this is not perfect either. If you use an "N" connector on long runs of heliax in a cold climate, you must be aware that the coefficients of expansion of the center conductor and the shield can be different... and on several occasions, I have seen the center pin pull back from the connector (and essentially disconnect) because the center conductor contracted more than the shield. Nb. This does not happen with all "N" connectors. This is less of a problem with BNC connectors because the coax used is generally has a somewhat flexible shield.
>
>
>
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>
>
> ------------------------------
>
> Message: 18
> Date: Tue, 18 Sep 2018 10:50:25 -0500
> From: Gene Sochor <[hidden email]>
> To: [hidden email]
> Subject: [Elecraft] K3/100-F Sold, P3F
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> K3/100-F s/n 6587 has been sold.
>
> P3-F s/n 2191 New, unopened in original packing is available for
> $500.  Shipping included continental US
>
> This had been purchased paired with a K3 for an SO2R station that was
> never configured.
>
> Gene Sochor N9SW   Cell: 630-404-8100
> PO Bo 413
> Wayne, IL 60184
> [hidden email]
>
>
>
> ------------------------------
>
> Message: 19
> Date: Tue, 18 Sep 2018 09:20:54 -0700
> From: Jim Brown <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] KAT500 Antenna Grounding
> Message-ID:
> <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> On 9/18/2018 6:15 AM, Bob McGraw K4TAX wrote:
>> Lightning protection is good on the outside of the house but static
>> discharge probably needs review.
> Bob,
>
> Take a look at the arrestors that Array Solutions sells, which are the
> circuit that were built under the ICE name until the owner died a decade
> or so ago, and that they sold. I'm now using them, and have them mounted
> in a large Hoffman enclosure. I like the circuit because I believe it is
> a better solution to the discharge problem, and I like their
> construction because the GDT is user replaceable. If you lose the GDT in
> a Polyphaser you throw it away and buy a new one.
>
> https://www.arraysolutions.com/surge-and-rf-protection/as-303u
>
> 73, Jim K9YC
>
>
>
> ------------------------------
>
> Message: 20
> Date: Tue, 18 Sep 2018 16:53:25 +0000
> From: Don Schroder <[hidden email]>
> To: "[hidden email]" <[hidden email]>
> Subject: [Elecraft] P3 Panadapter
> Message-ID:
> <[hidden email]>
>
> Content-Type: text/plain; charset="utf-8"
>
> Morning!
>
> I have a kit K2 s/n 7818 that is about 2/3rds complete. I?m a newbie and this is my first radio. I?ve been  looking at additions for my non-existent ham shack and am curious about the Elecraft P3. Looking at the advertising, I see it is for the K3 & K3s, and other radios.
>
> Hence, my question. How many of you consider the P3 to be a must have, and can it be used with a K2 transceiver? As a side note, what other optional equipment to the K2 would you consider necessary?
>
> Thanks, and 73!
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
>
>
> ------------------------------
>
> Message: 21
> Date: Tue, 18 Sep 2018 13:12:42 -0400
> From: Don Wilhelm <[hidden email]>
> To: Don Schroder <[hidden email]>, "[hidden email]"
> <[hidden email]>
> Subject: Re: [Elecraft] P3 Panadapter
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Don,
>
> You can use it with the K3 (the P3 input can be tuned anywhere between
> 455kHz and 21 MHz).
> You will have to add an IF output to the K2.  DX Engineering is now
> selling the Clifton Labs buffer amplifier which can be used for that
> purpose.
>
> I don't know what documentation is being sent with the DX Engineering
> kit, but if you need it, I can supply the original Clifton Labs document
> for the K2.
>
> 73,
> Don W3FPR
>
> On 9/18/2018 12:53 PM, Don Schroder wrote:
>> Morning!
>>
>> I have a kit K2 s/n 7818 that is about 2/3rds complete. I?m a newbie and this is my first radio. I?ve been  looking at additions for my non-existent ham shack and am curious about the Elecraft P3. Looking at the advertising, I see it is for the K3 & K3s, and other radios.
>>
>> Hence, my question. How many of you consider the P3 to be a must have, and can it be used with a K2 transceiver? As a side note, what other optional equipment to the K2 would you consider necessary?
>>
>
> ------------------------------
>
> Message: 22
> Date: Tue, 18 Sep 2018 10:51:45 -0700
> From: Wes Stewart <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] loss of RX sensitivity
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> It's difficult to argue with Frank's experience and expertise.? That said, fools
> rush in...
>
> I own some network analyzers, 1) an N2PK which I built with type N connectors,
> 2) a DG8SAQ VNWA-3, supplied with SMA connectors and 3) a RigExpert AA-55 Zoom
> with a SO239.? Professionally, I've used analyzers with type N, 3.5mm (beadless
> SMA) and K connectors. With the exception of the AA-55, which only goes to 55
> MHz, all of these can be calibrated with "precision" calibration kits that can
> cost thousands of dollars.? So far, Frank is right, not a BNC in the bunch.
>
> But that has changed with the introduction of the DG5MK's FA-VA5, one-port
> vector analyzer.? I am on the reserve list to buy one of these.? The thing to
> note is that it is supplied with a BNC connector.? There has been a lot of
> anguish, heartburn, etc about this on the VNWA Yahoo group but the consensus is
> that it will be fine and BNC calibration kit has been developed and tested
> without issue. https://www.youtube.com/watch?v=X8Z7veGV57o
>
> There are tens of thousands of BNCs on oscilloscopes and other instruments and
> I've seldom had an issue with them in 30+ years of lab work.? For quick
> disconnect I also use short jumper cables with BNCs to break the connections
> between the hardline running to the tower and the cable entrance to the shack
> during lightning season.? Admittedly, I'm only running 500 W.? When I can leave
> them more permanently connected I revert to type N.
>
> Wes? N7WS
>
> On 9/17/2018 5:04 PM, [hidden email] wrote:
>> If you have a vector network analyzer you'll discover that BNC
>> connectors aren't all that great at VHF and above, l oss and
>> impedance vary with connector axial alignment because the bayonnet
>> shell doesn't support aligh the connector body very well. Strain relief
>> is extremely important with BNC connectors. TNC connectors are
>> far superior but not widely used.
>>
>>
>> While professionally installed N connectors have superb RF
>> characteristics, all too often they're improperly installed -- even by
>> professionals -- leading to damaged connectors if the male pin is
>> misaligned, or unreliable contact if the pin or socket depth is just a
>> few millimeters less than the manufacturers specification. I use
>> only captive pin male N connectors, avoiding the most severe
>> problems. I never use female N connectors on cables, the N sockets
>> are much too fragile.
>>
>>
>> Its hard to beat high quality silver plated UHF connectors at HF and
>> 6 meters. But its important to use a tool to tighten them. That's a
>> small price to pay for a very reliable connector.
>>
>>
>> 73
>> Frank
>> W3LPL
>>
>
>
> ------------------------------
>
> Message: 23
> Date: Tue, 18 Sep 2018 17:59:28 +0000
> From: George Thornton <[hidden email]>
> To: "[hidden email]" <[hidden email]>, Don Schroder
> <[hidden email]>, "[hidden email]"
> <[hidden email]>
> Subject: Re: [Elecraft] P3 Panadapter
> Message-ID:
> <[hidden email]>
>
> Content-Type: text/plain; charset="utf-8"
>
> I have owned both the K2 and K3.  Perhaps the most fun I had in HAM radio was building the K2.   I learned a lot about soldering and assembly techniques.
>
> Electronics technology has advanced with miniaturization and surface mount parts.  The skill and equipment requirements for surface mount work is beyond the average amateur.  Elecraft does not offer kits that require surface mount work.
>
> The assembly process for the K3 is much less satisfying than with the K2.   All circuit boards come pre-assembled and you are pretty much just building the box and plugging things in.
>
> I also have worked extensively with the P3.   I find it very helpful.  There is a wealth of knowledge you get from being able to visually see the spectrum you are working.
>
> That being said, some of the advantages of the P3 come from its close integration with the K3.  I would believe that close integration would not be possible with the K2.
>
> There are also other panadapter options including the LP-Pan, which will allow you to view the K2's spectrum.   I much prefer the P3 because of the handy controls that allow you to adjust the image, but some of those other options may be less expensive.
>
> Think also of where you might go with all this.  The K2 is a wonderful rig and more than adequate for HF work.  If yuou get really serious about this you may, as I did, choose to upgrade to either the K3s or KX3.  The P3 could be used with the K3s but the KX3 has a different, smaller unit.
>
>
>
>
>
> -----Original Message-----
> From: [hidden email] <[hidden email]> On Behalf Of Don Wilhelm
> Sent: Tuesday, September 18, 2018 10:13 AM
> To: Don Schroder <[hidden email]>; [hidden email]
> Subject: Re: [Elecraft] P3 Panadapter
>
> Don,
>
> You can use it with the K3 (the P3 input can be tuned anywhere between 455kHz and 21 MHz).
> You will have to add an IF output to the K2.  DX Engineering is now selling the Clifton Labs buffer amplifier which can be used for that purpose.
>
> I don't know what documentation is being sent with the DX Engineering kit, but if you need it, I can supply the original Clifton Labs document for the K2.
>
> 73,
> Don W3FPR
>
> On 9/18/2018 12:53 PM, Don Schroder wrote:
>> Morning!
>>
>> I have a kit K2 s/n 7818 that is about 2/3rds complete. I?m a newbie and this is my first radio. I?ve been  looking at additions for my non-existent ham shack and am curious about the Elecraft P3. Looking at the advertising, I see it is for the K3 & K3s, and other radios.
>>
>> Hence, my question. How many of you consider the P3 to be a must have, and can it be used with a K2 transceiver? As a side note, what other optional equipment to the K2 would you consider necessary?
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
>
> ------------------------------
>
> Message: 24
> Date: Tue, 18 Sep 2018 11:32:48 -0700
> From: Fred Jensen <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] P3 Panadapter
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Congratulations on your K2 Don, I've had #4398 for many years and it is
> a fun radio to operate, and will hold it's own with the "big guns" out
> there.? Don, W3FPR, is your go-to guy for all things K2.
>
> The P3 is basically a tuneable receiver from just below the AM broadcast
> band to somewhere around 20 MHz.? It will "work" with the K2 but you
> have to bring out the IF signal.? I put "work" in quotes because the P3
> will integrate with a K3 to give several modes of operation.? One very
> popular one is "Fixed Tune" where the edges of the display remain fixed
> and tuning the K3 moves a cursor.
>
> With the K2, the only mode available is "Tracking Mode" where the center
> of the screen is always where you are receiving, and as you tune, the
> signals on the band all move.
>
> As far as general P3 usefulness, for me it is huge.? It's all I look at
> when I operate.? I operate W7RN remotely on occasion, I really miss the
> P3, and I hope Elecraft is working on a remote capability for it.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> On 9/18/2018 9:53 AM, Don Schroder wrote:
>> Morning!
>>
>> I have a kit K2 s/n 7818 that is about 2/3rds complete. I?m a newbie and this is my first radio. I?ve been  looking at additions for my non-existent ham shack and am curious about the Elecraft P3. Looking at the advertising, I see it is for the K3 & K3s, and other radios.
>>
>> Hence, my question. How many of you consider the P3 to be a must have, and can it be used with a K2 transceiver? As a side note, what other optional equipment to the K2 would you consider necessary?
>>
>>
>
>
> ------------------------------
>
> Message: 25
> Date: Tue, 18 Sep 2018 14:45:33 -0400
> From: Don Wilhelm <[hidden email]>
> To: "[hidden email]" <[hidden email]>
> Subject: Re: [Elecraft] P3 Panadapter
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> The main difference between the P3 and PX3 is the input.? The P3 has an
> IF input while the PX3 input must be baseband RX I and Q signals.
>
> 73,
> Don W3FPR
>
> On 9/18/2018 1:59 PM, George Thornton wrote:
>> I also have worked extensively with the P3.   I find it very helpful.  There is a wealth of knowledge you get from being able to visually see the spectrum you are working.
>>
>> That being said, some of the advantages of the P3 come from its close integration with the K3.  I would believe that close integration would not be possible with the K2.
>>
>> There are also other panadapter options including the LP-Pan, which will allow you to view the K2's spectrum.   I much prefer the P3 because of the handy controls that allow you to adjust the image, but some of those other options may be less expensive.
>>
>> Think also of where you might go with all this.  The K2 is a wonderful rig and more than adequate for HF work.  If yuou get really serious about this you may, as I did, choose to upgrade to either the K3s or KX3.  The P3 could be used with the K3s but the KX3 has a different, smaller unit.
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: [hidden email] <[hidden email]> On Behalf Of Don Wilhelm
>> Sent: Tuesday, September 18, 2018 10:13 AM
>> To: Don Schroder <[hidden email]>; [hidden email]
>> Subject: Re: [Elecraft] P3 Panadapter
>>
>> Don,
>>
>> You can use it with the K3 (the P3 input can be tuned anywhere between 455kHz and 21 MHz).
>> You will have to add an IF output to the K2.  DX Engineering is now selling the Clifton Labs buffer amplifier which can be used for that purpose.
>>
>> I don't know what documentation is being sent with the DX Engineering kit, but if you need it, I can supply the original Clifton Labs document for the K2.
>>
>> 73,
>> Don W3FPR
>>
>> On 9/18/2018 12:53 PM, Don Schroder wrote:
>>> Morning!
>>>
>>> I have a kit K2 s/n 7818 that is about 2/3rds complete. I?m a newbie and this is my first radio. I?ve been  looking at additions for my non-existent ham shack and am curious about the Elecraft P3. Looking at the advertising, I see it is for the K3 & K3s, and other radios.
>>>
>>> Hence, my question. How many of you consider the P3 to be a must have, and can it be used with a K2 transceiver? As a side note, what other optional equipment to the K2 would you consider necessary?
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
>
>
> ------------------------------
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> http://mailman.qth.net/mailman/listinfo/elecraft
> You must be a subscriber to post.
> Elecraft web page: http://www.elecraft.com
>
> End of Elecraft Digest, Vol 173, Issue 14
> *****************************************

--
73&CU Penna, OH2G, OF2CG
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