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KPA-1500 failed!

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Don Wilhelm

Re: Removing/connecting PL-259s

Drew and all,

I have changed the subject line to something more akin to the current
discussion.

Have you considered adding a coax switch? Turning to switch to an open
position (or better yet to a dummy load) when the radio is not in use
will provide protection and is a lot easier than removing the connectors.

73,
Don W3FPR

On 2/16/2019 6:07 PM, Drew AF2Z wrote:
> FWIW, I use NO-OX-ID contact grease on my PL259 connectors. This allows
> very tight snugging by hand, no need of wrenching.
>
> During lightning season I frequently connect/disconnect my rig and tuner
> cables. The fine film of lube on the connector threads makes a big
> difference. Without it? A real PITA, not to mention wear and tear on the
> the SO-239's.
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riese-k3djc

Re: KPA-1500 failed!

In reply to this post by Peter W2IRT

https://en.wikipedia.org/wiki/UHF_connector

On Sat, 16 Feb 2019 14:19:48 -0700 Wes <[hidden email]> writes:

> Thousands of people; without issue.
>
> Wes N7WS
>
> On 2/16/2019 1:55 PM, John Stengrevics wrote:
> > Who uses PL-259s?
>
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Gary K9GS

Re: KPA-1500 failed!

In reply to this post by stengrevics

That's about the silliest thing I've ever heard.Really, DIN connectors on a radio?73,Gary K9GS
-------- Original message --------From: John Stengrevics <[hidden email]> Date: 2/16/19 2:55 PM (GMT-06:00) To: [hidden email] Cc: [hidden email] Subject: Re: [Elecraft] KPA-1500 failed! Who uses PL-259s? They suck. I ordered my K3S with Ns and really should have specified DINs. But, that is a retrofit project for another day.JohnWA1EAZ> On Feb 16, 2019, at 2:47 PM, Jim Brown <[hidden email]> wrote:> > On 2/16/2019 9:39 AM, Bob McGraw K4TAX wrote:>> Do not trust PL-259 connectors installed only "finger tight". Today many of those PL-259 connectors "look good" but are really poor quality connectors.> > If you live in North America, the ONLY good PL-259 connector is one that labeled Amphenol 83-1SP. Most others are JUNK. I'm told there are some other decent brands sold in EU.> >> ALWAYS snug the PL-259's with a pair of 4" channel lock pliers.> > RIGHT. And always be VERY careful about how you solder them, especially the shield.> > 73, Jim K9YC> > ______________________________________________________________> 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 jstengrevics@comcast.net______________________________________________________________Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:[hidden email] list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to [hidden email]
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Jim AB3CV

Re: KPA-1500 failed!

In reply to this post by stengrevics

Google DIN 4.3/10.

https://blog.pasternack.com/rf-components/coaxial-connectors/what-is-so-special-about-the-4-3-10-coaxial-connector/

jim ab3cv

On Sat, Feb 16, 2019 at 7:09 PM Gary K9GS <[hidden email]> wrote:

> That's about the silliest thing I've ever heard.Really, DIN connectors on
> a radio?73,Gary K9GS
> -------- Original message --------From: John Stengrevics <
> [hidden email]> Date: 2/16/19 2:55 PM (GMT-06:00) To:
> [hidden email] Cc: [hidden email] Subject: Re:
> [Elecraft] KPA-1500 failed! Who uses PL-259s? They suck. I ordered my K3S
> with Ns and really should have specified DINs. But, that is a retrofit
> project for another day.JohnWA1EAZ> On Feb 16, 2019, at 2:47 PM, Jim Brown <
> [hidden email]> wrote:> > On 2/16/2019 9:39 AM, Bob McGraw
> K4TAX wrote:>> Do not trust PL-259 connectors installed only "finger
> tight". Today many of those PL-259 connectors "look good" but are really
> poor quality connectors.> > If you live in North America, the ONLY good
> PL-259 connector is one that labeled Amphenol 83-1SP. Most others are
> JUNK. I'm told there are some other decent brands sold in EU.> >> ALWAYS
> snug the PL-259's with a pair of 4" channel lock pliers.> > RIGHT. And
> always be VERY careful about how you solder them, especially the shield.> >
> 73, Jim K9YC> >
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Bob McGraw - K4TAX

Re: Removing/connecting PL-259s

In reply to this post by Don Wilhelm

Don et al:

That is the best idea! Plus if one has a adequate outside lightning
protection system, properly bonded to the AC mains, and then disconnects
inside where they use a coax switch with gas discharge tubes and a
grounding position, they are negating part of the system protection.

73

Bob, K4TAX

On 2/16/2019 5:24 PM, Don Wilhelm wrote:

> Drew and all,
>
> I have changed the subject line to something more akin to the current
> discussion.
>
> Have you considered adding a coax switch? Turning to switch to an
> open position (or better yet to a dummy load) when the radio is not in
> use will provide protection and is a lot easier than removing the
> connectors.
>
> 73,
> Don W3FPR
>
> On 2/16/2019 6:07 PM, Drew AF2Z wrote:
>> FWIW, I use NO-OX-ID contact grease on my PL259 connectors. This
>> allows very tight snugging by hand, no need of wrenching.
>>
>> During lightning season I frequently connect/disconnect my rig and
>> tuner cables. The fine film of lube on the connector threads makes a
>> big difference. Without it? A real PITA, not to mention wear and tear
>> on the the SO-239's.
> ______________________________________________________________
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>

john@kk9a.com

Re: KPA-1500 failed!

In reply to this post by Peter W2IRT

Right Gary, a 7/8 EIA flange would be a much better radio connector:)

Actually I have a few 4.3-10 connecters, they should be an easy swap with
SO-239/N jacks but I have yet to use one and I certainly would not do this
on my K3S.

73,
John KK9A

Gary K9GS wrote:

That's about the silliest thing I've ever heard.Really, DIN connectors on a
radio?73,Gary K9GS

From: John Stengrevics <jstengrevics
Date: 2/16/19 2:55 PM (GMT-06:00)

Who uses PL-259s? They suck. I ordered my K3S with Ns and really should
have specified DINs. But, that is a retrofit project for another day.

JohnWA1EAZ

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Drew AF2Z

Re: Removing/connecting PL-259s

In reply to this post by Don Wilhelm

No, a bit paranoid perhaps but I disconnect the rig entirely, including
p/s cable. It's not too bad since I'm mostly a CW operator and don't
usually have a lot of other peripherals, SDR, computer, etc. connected
to the K3.

BTW, I don't trust the Amphenol name particularly after getting a bad
plug that wouldn't thread correctly (only realized after soldering the
thing on the coax and trying to use it. Arggh!). Amphenol is offshore
product now.

73,
Drew
AF2Z

On 02/16/19 18:24, Don Wilhelm wrote:

> Drew and all,
>
> I have changed the subject line to something more akin to the current
> discussion.
>
> Have you considered adding a coax switch? Turning to switch to an open
> position (or better yet to a dummy load) when the radio is not in use
> will provide protection and is a lot easier than removing the connectors.
>
> 73,
> Don W3FPR
>
> On 2/16/2019 6:07 PM, Drew AF2Z wrote:
>> FWIW, I use NO-OX-ID contact grease on my PL259 connectors. This
>> allows very tight snugging by hand, no need of wrenching.
>>
>> During lightning season I frequently connect/disconnect my rig and
>> tuner cables. The fine film of lube on the connector threads makes a
>> big difference. Without it? A real PITA, not to mention wear and tear
>> on the the SO-239's.
>

K9MA

Re: Removing/connecting PL-259s

I use a single PL-259 for all the transmitting antennas as a lightning
disconnect. I can attest to the fact that trouble ensues if I forget to
tighten it with the pliers. I crashed my computer during the contest
today. Twice, before I caught on.

73,
Scott K9MA

On 2/16/2019 21:40, Drew AF2Z wrote:

> No, a bit paranoid perhaps but I disconnect the rig entirely,
> including p/s cable. It's not too bad since I'm mostly a CW operator
> and don't usually have a lot of other peripherals, SDR, computer, etc.
> connected to the K3.
>
> BTW, I don't trust the Amphenol name particularly after getting a bad
> plug that wouldn't thread correctly (only realized after soldering the
> thing on the coax and trying to use it. Arggh!). Amphenol is offshore
> product now.
>
> 73,
> Drew
> AF2Z
>
>
> On 02/16/19 18:24, Don Wilhelm wrote:
>> Drew and all,
>>
>> I have changed the subject line to something more akin to the current
>> discussion.
>>
>> Have you considered adding a coax switch? Turning to switch to an
>> open position (or better yet to a dummy load) when the radio is not
>> in use will provide protection and is a lot easier than removing the
>> connectors.
>>
>> 73,
>> Don W3FPR
>>
>> On 2/16/2019 6:07 PM, Drew AF2Z wrote:
>>> FWIW, I use NO-OX-ID contact grease on my PL259 connectors. This
>>> allows very tight snugging by hand, no need of wrenching.
>>>
>>> During lightning season I frequently connect/disconnect my rig and
>>> tuner cables. The fine film of lube on the connector threads makes a
>>> big difference. Without it? A real PITA, not to mention wear and
>>> tear on the the SO-239's.
>>
>
>
> ______________________________________________________________
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--
Scott K9MA

[hidden email]

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Jim Brown-10

Re: KPA-1500 failed!

In reply to this post by Drew AF2Z

On 2/16/2019 3:07 PM, Drew AF2Z wrote:
> This allows very tight snugging by hand, no need of wrenching.

What's the logic behind that?

73, Jim K9YC

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Gary K9GS

Re: KPA-1500 failed!

In reply to this post by Jim AB3CV

Exactly my point. A panel mount version is $25.Do you really want to see that on K3?Very silly.73,Gary K9GS
-------- Original message --------From: Jim Miller <[hidden email]> Date: 2/16/19 6:48 PM (GMT-06:00) To: Gary K9GS <[hidden email]> Cc: John Stengrevics <[hidden email]>, Jim Brown <[hidden email]>, Elecraft Reflector <[hidden email]> Subject: Re: [Elecraft] KPA-1500 failed! Google DIN 4.3/10.https://blog.pasternack.com/rf-components/coaxial-connectors/what-is-so-special-about-the-4-3-10-coaxial-connector/jim ab3cvOn Sat, Feb 16, 2019 at 7:09 PM Gary K9GS <[hidden email]> wrote:That's about the silliest thing I've ever heard.Really, DIN connectors on a radio?73,Gary K9GS
-------- Original message --------From: John Stengrevics <[hidden email]> Date: 2/16/19 2:55 PM (GMT-06:00) To: [hidden email] Cc: [hidden email] Subject: Re: [Elecraft] KPA-1500 failed! Who uses PL-259s? They suck. I ordered my K3S with Ns and really should have specified DINs. But, that is a retrofit project for another day.JohnWA1EAZ> On Feb 16, 2019, at 2:47 PM, Jim Brown <[hidden email]> wrote:> > On 2/16/2019 9:39 AM, Bob McGraw K4TAX wrote:>> Do not trust PL-259 connectors installed only "finger tight". Today many of those PL-259 connectors "look good" but are really poor quality connectors.> > If you live in North America, the ONLY good PL-259 connector is one that labeled Amphenol 83-1SP. Most others are JUNK. I'm told there are some other decent brands sold in EU.> >> ALWAYS snug the PL-259's with a pair of 4" channel lock pliers.> > RIGHT. And always be VERY careful about how you solder them, especially the shield.> > 73, Jim K9YC> > ______________________________________________________________> 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 jstengrevics@comcast.net______________________________________________________________Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:[hidden email] list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to [hidden email]
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Christopher Hoover

Re: KPA-1500 failed!

In reply to this post by stengrevics

Argh. Wish I had known that an option!

On Sat, Feb 16, 2019, 12:56 PM John Stengrevics <[hidden email]
wrote:

> Who uses PL-259s? They suck. I ordered my K3S with Ns and really should
> have specified DINs. But, that is a retrofit project for another day.
>
> John
> WA1EAZ
>
> > On Feb 16, 2019, at 2:47 PM, Jim Brown <[hidden email]>
> wrote:
> >
> > On 2/16/2019 9:39 AM, Bob McGraw K4TAX wrote:
> >> Do not trust PL-259 connectors installed only "finger tight". Today
> many of those PL-259 connectors "look good" but are really poor quality
> connectors.
> >
> > If you live in North America, the ONLY good PL-259 connector is one that
> labeled Amphenol 83-1SP. Most others are JUNK. I'm told there are some
> other decent brands sold in EU.
> >
> >> ALWAYS snug the PL-259's with a pair of 4" channel lock pliers.
> >
> > RIGHT. And always be VERY careful about how you solder them, especially
> the shield.
> >
> > 73, Jim K9YC
> >
> > ______________________________________________________________
> > 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]
>
> ______________________________________________________________
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Drew AF2Z

Re: KPA-1500 failed!

In reply to this post by Jim Brown-10

Stiction of non lubricated threads can give a false sense of tight
connection. PL259/SO239 in particular can have poor contact through the
ground conductors while the thread seems tight.

When the threads are lubricated stiction does not occur and hand
tightening always ensures that the front ring of the plug is butted
against the mating surface on the SO239; and that the rear lip of the
shell is firmly butted against the short threaded section at the back of
the plug. These two narrow ring surfaces with relatively small contact
area are essential to good ground connection in the PL259.

73,
Drew
AF2Z

On 02/16/19 23:22, Jim Brown wrote:

> On 2/16/2019 3:07 PM, Drew AF2Z wrote:
>> This allows very tight snugging by hand, no need of wrenching.
>
> What's the logic behind that?
>
> 73, Jim K9YC
>
>
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Bill Clarke

Slip on adapters on PL259s

Here comes the flames: I use slip on adapters on my PL259s that connect
my rigs/tuners/etc. to the outside world on my bulkhead. I have been
using this method for over 30 years and NEVER had a connector associated
failure. It allows for quick connect/disconnect when shutting down for
thunderstorm related issues. I use RG8X for all indoor coax duties and
run the KPA500 - so no power levels requiring heavier cable. I do snug
PL259s on equipment slightly with pliers.

Fact is, the only coax failure I have had of recent note, was the poor
quality patch cable between the P3 and K3. It was long ago replaced with
a Mil Spec cable from my junk box.

I do use a number of Daiwa 2-position coax switches for various
purposes. Any comments on coax switches?

Bill W2BLC K-Line

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John Simmons

Re: Slip on adapters on PL259s

Yeah! I have a Daiwa CS401 that I wanted to use to switch an antenna
between to K3s. The isolation is so poor that 95 watts from one radio
activates the high RF receive level on the other. Substituting a DELTA-4
solved the problem.

73,
-John NI0K

bill wrote on 2/17/2019 8:23 AM:

> Here comes the flames: I use slip on adapters on my PL259s that
> connect my rigs/tuners/etc. to the outside world on my bulkhead. I
> have been using this method for over 30 years and NEVER had a
> connector associated failure. It allows for quick connect/disconnect
> when shutting down for thunderstorm related issues. I use RG8X for all
> indoor coax duties and run the KPA500 - so no power levels requiring
> heavier cable. I do snug PL259s on equipment slightly with pliers.
>
> Fact is, the only coax failure I have had of recent note, was the poor
> quality patch cable between the P3 and K3. It was long ago replaced
> with a Mil Spec cable from my junk box.
>
> I do use a number of Daiwa 2-position coax switches for various
> purposes. Any comments on coax switches?
>
> Bill W2BLC K-Line
>
>
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john@kk9a.com

Re: Removing/connecting PL-259s

In reply to this post by Don Wilhelm

I had that happen once too many years ago with an Amphenol PL-259. Since
then I make sure that they fit together before soldering!

John KK9A

Drew AF2Z wrote:

No, a bit paranoid perhaps but I disconnect the rig entirely, including
p/s cable. It's not too bad since I'm mostly a CW operator and don't
usually have a lot of other peripherals, SDR, computer, etc. connected
to the K3.

BTW, I don't trust the Amphenol name particularly after getting a bad
plug that wouldn't thread correctly (only realized after soldering the
thing on the coax and trying to use it. Arggh!). Amphenol is offshore
product now.

73,
Drew
AF2Z

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Eric Swartz - WA6HHQ

Re: PL-259 threads closed.

Administrator

In reply to this post by Jim Brown-10

Folks, let's close the PL259 threads now in the interest of reducing list email overload for the rest of our readers.

73,
Eric
moderator, even on my days off..
elecraft.com
_..._

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Eric Swartz - WA6HHQ

Re: Removing/connecting PL-259s

Administrator

In reply to this post by john@kk9a.com

Folks, let's close the PL259 threads now in the interest of reducing list email overload for the rest of our readers.

73,
Eric
moderator, even on my days off..
elecraft.com
_..._

> On Feb 17, 2019, at 8:58 AM, <[hidden email]> <[hidden email]> wrote:
>
> I had that happen once too many years ago with an Amphenol PL-259. Since
> then I make sure that they fit together before soldering!
>
> John KK9A
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George Danner-2

Re: Slip on adapters on PL259s

In reply to this post by Bill Clarke

Bill,
We used the "slip-ons" to have quick reconfiguration of monitors on a live
remote (TV) truck when we were still using UHF connectors for video.
We had no failures that I remember - remote live trucks live in a very
hostile environment!

We used the UHF slip-ons until the conversion to BNCs beginning in the early
70s

73
George AI4VZ

-----Original Message-----
From: bill

Here comes the flames: I use slip on adapters on my PL259s that connect
my rigs/tuners/etc. to the outside world on my bulkhead. I have been
using this method for over 30 years and NEVER had a connector associated
failure. It allows for quick connect/disconnect when shutting down for
thunderstorm related issues. I use RG8X for all indoor coax duties and
run the KPA500 - so no power levels requiring heavier cable. I do snug
PL259s on equipment slightly with pliers.

Fact is, the only coax failure I have had of recent note, was the poor
quality patch cable between the P3 and K3. It was long ago replaced with
a Mil Spec cable from my junk box.

I do use a number of Daiwa 2-position coax switches for various
purposes. Any comments on coax switches?

Bill W2BLC K-Line

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ny9h@arrl.net

Re: Slip on adapters on PL259s

In reply to this post by Bill Clarke

I soldered metal hose clamps with handles, onto the quick plugs.

1 turn on the handle and odd it comes...
Times 5 cables plus rotor cablr5

Sent from Xfinity Connect Application

-----Original Message-----

From: [hidden email]
To: [hidden email]
Sent: 2019-02-17 9:24:33 AM
Subject: [Elecraft] Slip on adapters on PL259s

Here comes the flames: I use slip on adapters on my PL259s that connect
my rigs/tuners/etc. to the outside world on my bulkhead. I have been
using this method for over 30 years and NEVER had a connector associated
failure. It allows for quick connect/disconnect when shutting down for
thunderstorm related issues. I use RG8X for all indoor coax duties and
run the KPA500 - so no power levels requiring heavier cable. I do snug
PL259s on equipment slightly with pliers.

Fact is, the only coax failure I have had of recent note, was the poor
quality patch cable between the P3 and K3. It was long ago replaced with
a Mil Spec cable from my junk box.

I do use a number of Daiwa 2-position coax switches for various
purposes. Any comments on coax switches?

Bill W2BLC K-Line

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Post: mailto:[hidden email]

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Paul Baldock

Re: KPA-1500 failed!

In reply to this post by Peter W2IRT

Eric -

I know a number of KPA1500s have been returned to you with one of the
output transistors dead. Is there common source for the problem that
the rest of us can try and avoid?

regards

- Paul

At 10:13 AM 2/16/2019, you wrote:

>Hi Peter,
>
>I'm sorry to hear about this failure and deeply apologize for the problem.
>
>I'll follow up with another email to you to diagnose what actually happened.
>
>In any case we'll deal with it quickly and get your amp repaired asap.
>
>Eric
>elecraft.com
>_..._
>
>
>
> > On Feb 16, 2019, at 6:28 AM, <[hidden email]> <[hidden email]> wrote:
> >
> > I was operating in the ARRL-CW contest this morning and on 20m,
> with a 1.2:1
> > SWR on the Yagi, all of a sudden I saw my power drop to about 450-500W with
> > about 40W in. Worked a few stations but not as easily as when I turned
> > everything on this morning. Switched over to phone and made a few contacts.
> > Audio is fine barefoot with 100W out of the K3s-which suffered blown finals
> > itself during CQWW SSB last fall, but with the amp in I got reports that my
> > audio was badly distorted.
> >
> > Before I send it in, is there anything I should look at or any
> diagnostics I
> > can easily perform? For the cost of this, I'd have thought protection would
> > have kicked in to prevent anything untoward from happening. I'm in complete
> > disbelief, to be honest.
> >
> > ---------------------------------------------
> > 73 and Good DX
> > Peter, W2IRT
> >
> >
> >
> > ______________________________________________________________
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> > Post: mailto:[hidden email]
> >
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> > Message delivered to [hidden email]
>______________________________________________________________
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>
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123