Elecraft

Antenna Analyzer

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John Harper

Antenna Analyzer

>Elecraft rigs, including the KX2, have an indicator for SWR that the rig
>sees. Resonance can be clearly seen by moving up and down the band to
>find it.

Not necessarily. Resonance and point of lowest SWR do not always coincide.

John AE5X
https://ae5x.blogspot.com
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Bob McGraw - K4TAX

Re: Antenna Analyzer

Agreed.   I've always said hams cut an antenna a bit long and then trim
it to get the lowest SWR at the desired frequency. This does not
necessarily make for a resonant antenna.    My 75M antenna is resonant
at 3.8 MHz as determined using a Grid Dip Oscillator, but the impedance
is about 35 ohms giving a SWR of about 1.4:1 . At 3.9 MHz the SWR is
1:1. The length is actually 123 ft. But the SWR 1:1 point indicates
the antenna is 119.8 ft in length.

The resonant electrical length of a 1/2 wave dipole antenna is defined
as Length being = (492 x K) / Frequency [MHz.]    This does not assure
it will have a 1:1 SWR at the design frequency, but only that it will be
resonant at that frequency.   {K = ratio of 1/2 wavelength to conductor
diameter. Typically for wire HF antennas a value of 0.95 is used.}

Just remember, the radiation resistance of the antenna will vary
according to height above ground. Thus a 1/2 wave dipole at resonance
will have its center feed impedance vary from some 20 ohms at 1/8
wavelength above ground to over 90 ohms at 3/8 wavelength above ground.
And at 1/2 wavelength above ground the impedance is near 70 ohms. Of
course ground conductivity will affect the actual results.

73

Bob, K4TAX

On 12/1/2017 1:54 PM, John Harper wrote:

>> Elecraft rigs, including the KX2, have an indicator for SWR that the rig
>> sees. Resonance can be clearly seen by moving up and down the band to
>> find it.
> Not necessarily. Resonance and point of lowest SWR do not always coincide.
>
> John AE5X
> https://ae5x.blogspot.com
> ______________________________________________________________
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Don Wilhelm

Re: Antenna Analyzer

Bob and all,

The "classic" formula for a wire half wave dipole (known to most hams)
is 468/F (length in feet and frequency in MHz), and your "492 x K"
factor is correct. Sorry for those who use metric, you will have to
convert)

However, that may not lead to a resonant antenna due to a number of
factors - height above ground, proximity to other objects, diameter to
length ratio of the wire among the most obvious factors.

In his years on this planet, L.B. Cebik long preached that "cutting
formulas" such as 468/F were only an approximation.

Armed with an antenna analyzer and a calculator plus measuring tape, you
can cut an antenna to be 'resonate' at the shack end of the antenna
feedline in two tries. The following technique appeared in QST
Technical Correspondence for May 2017 (yes, it was my contribution).

The steps are as follows:
- Cut the antenna according to the 468/F formula and add 10%. Write
down the length.
- Put it into its final position and with the antenna analyzer, measure
its resonance point (take your pick of whether that is point of lowest
SWR or the point where the reactance goes to zero).
- Multiply the length of the antenna by the frequency you picked to call
the resonant point. That will yield a number to replace the "468" in
the cutting formula.
- Use the resulting number and divide by the frequency where you want
resonance to be. That is the new length of the antenna.
- Cut the antenna to the new length and put it up and operate.

This works well for HF. VHF may have other factors involved, so you may
have to check the results again after the initial adjustment, but the
principle remains the same.
This method takes into account the antenna surroundings and shortens the
"cut and try" process considerably.

73
Don W3FPR

On 12/1/2017 3:22 PM, Bob McGraw K4TAX wrote:

> Agreed.   I've always said hams cut an antenna a bit long and then trim
> it to get the lowest SWR at the desired frequency. This does not
> necessarily make for a resonant antenna.    My 75M antenna is resonant
> at 3.8 MHz as determined using a Grid Dip Oscillator, but the impedance
> is about 35 ohms giving a SWR of about 1.4:1 . At 3.9 MHz the SWR is
> 1:1. The length is actually 123 ft. But the SWR 1:1 point indicates
> the antenna is 119.8 ft in length.
>
> The resonant electrical length of a 1/2 wave dipole antenna is defined
> as Length being = (492 x K) / Frequency [MHz.]    This does not assure
> it will have a 1:1 SWR at the design frequency, but only that it will be
> resonant at that frequency.   {K = ratio of 1/2 wavelength to conductor
> diameter. Typically for wire HF antennas a value of 0.95 is used.}
>

John Perlick

Re: Antenna Analyzer

In reply to this post by John Harper

I have the SARK and have used it around the world. It works great, is accurate, tiny, self contained and easy to use. Only downside is price but mine has easily paid for itself (by reducing the number of times I had to climb my tower!).

John Perlick
Aria Corporation
www.ariacorp.com

> On Dec 1, 2017, at 11:37 AM, "[hidden email]" <[hidden email]> wrote:
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> Today's Topics:
>
> 1. Antenna Analyzer (John Harper)
> 2. Re: Antenna Analyzer (Dave Cole (NK7Z))
> 3. FR - KX2 max output now 12 watts (experimental) (John Oppenheimer)
> 4. Re: Antenna Analyzer (John Oppenheimer)
> 5. Re: Antenna Analyzer (Michael Walker)
> 6. Re: Antenna Analyzer (Jim Sheldon)
> 7. Re: Antenna Analyzer (Bob N3MNT)
> 8. Eleraft list (Paul (Tex) Herson)
> 9. For sale (Sid Leben)
> 10. Re: Antenna Analyzer (Dave Cole (NK7Z))
> 11. Re: Antenna Analyzer (Mike Cox)
> 12. Re: Antenna Analyzer (FA-VA4) (Peter Eijlander (PA0PJE))
> 13. Re: Antenna Analyzers (Mike Lichtman)
> 14. OT - Want to buy SideKar (Paul (Tex) Herson)
> 15. Antenna Analyzer (Dick Dickinson)
> 16. Re: Eleraft list (Charlie T)
> 17. Happiness is a new Elecraft Purchase (Mark Tosiello)
> 18. Re: Antenna Analyzer (Igor Sokolov)
> 19. Re: K3 PRE function question (Edward R Cole)
> 20. Re: K3 PRE function question (GRANT YOUNGMAN)
> 21. Re: Antenna Analyzer (FA-VA4) (Ignacy)
> 22. Re: Antenna Analyzer (FA-VA4) (Mark Goldberg)
> 23. Re: Antenna Analyzer (Doug Person)
> 24. Re: Antenna Analyzer (George Thornton)
> 25. K1 price? (Ken Alexander)
> 26. Re: Antenna Analyzer (Ronnie Hull)
> 27. Re: Antenna Analyzer (Michael Walker)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 1 Dec 2017 06:57:08 -0600
> From: John Harper <[hidden email]>
> To: Elecraft list <[hidden email]>
> Subject: [Elecraft] Antenna Analyzer
> Message-ID:
> <CAPHmH=[hidden email]>
> Content-Type: text/plain; charset="UTF-8"
>
> I highly recommend this one - cost effective, easy to build and compares
> favorable to more expensive models:
> https://ae5x.blogspot.com/2017/10/new-antenna-analyzer.html
>
> More here:
> https://ae5x.blogspot.com/2017/11/a-brief-comparison-of-two-antenna.html
>
>
> 73,
> John AE5X
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 1 Dec 2017 04:58:22 -0800
> From: "Dave Cole (NK7Z)" <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> The AA series from Rigexpert is also very lightweight...
>
> 73s and thanks,
> Dave
> NK7Z
> http://www.nk7z.net
>
>> On 12/01/2017 04:53 AM, John Stengrevics wrote:
>> The RigExpert line is small.
>>
>> 73,
>>
>> John
>> WA1EAZ
>>
>>> On Dec 1, 2017, at 7:49 AM, <[hidden email]> <[hidden email]> wrote:
>>>
>>> just a quick question for the collective group here. I have built up my KX-2 travel kit. The first week of november I took it with me to a cabin I leased outside of Gatlinburg, TN for some portable operating when I wasn?t up in the mountains hiking. I took m y Super Antenna MP-1 plus the parts to throw up a full wave loop for 40M. I did throw the loop up, and it out performed the MP-1 by kudo?s. But it struck me that it might be nice to add a small antenna analyzer to my kit.
>>> I don?t need a big full size MFJ, which I do have. But something small. Any experience here y?all?
>>>
>>> thanks in advance for your answers
>>>
>>> Ronnie W5SUM
>>> ______________________________________________________________
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>>
>> ______________________________________________________________
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>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
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>>
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 1 Dec 2017 07:19:15 -0600
> From: John Oppenheimer <[hidden email]>
> To: [hidden email]
> Subject: [Elecraft] FR - KX2 max output now 12 watts (experimental)
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> Used the new FW during my early morning 40M CW session. Used KX2 #80
> with external LiFePO4 battery and inline W1 Power Meter. Antenna SWR =
> 1.3. The W1 12W LED does turn on. Measured DL1 power is 11.8 watts.
> Ambient operating temperature was 22 C.
>
> Sent many CQs before receiving an answer. Had two long QSOs. Maximum PA
> temperature during CQs and conversations was 41 C.
>
> John KN5L
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 1 Dec 2017 07:23:20 -0600
> From: John Oppenheimer <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8
>
> The SARK 110 is very small with many features:
>
> http://www.sark110.com/
>
> John KN5L
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 1 Dec 2017 08:25:19 -0500
> From: Michael Walker <[hidden email]>
> To: "[hidden email]" <[hidden email]>
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID:
> <CA+33ts5+ghSPiPKe+-36a=-4sQ2FRejg3M6m=[hidden email]>
> Content-Type: text/plain; charset="UTF-8"
>
> I would have to agree. the Rigexpert AA series.
>
> Well made, drop proof and stand alone.
>
> Mike va3mw
>
>
>> On Fri, Dec 1, 2017 at 8:23 AM, John Oppenheimer <[hidden email]> wrote:
>>
>> The SARK 110 is very small with many features:
>>
>> http://www.sark110.com/
>>
>> John KN5L
>> ______________________________________________________________
>> 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: Fri, 01 Dec 2017 13:39:25 +0000
> From: "Jim Sheldon" <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <em942ec99b-08bb-46ae-9d37-bed276b4c44c@jimsdesktop-pc>
> Content-Type: text/plain; format=flowed; charset=utf-8
>
> I was introduced to the SARK-110 several years ago and besides being an
> excellent antenna analyzer, it had one feature that nobody else had
> (when I bought the SARK) and that is called a "Time Domain
> Reflectometer". This allows you to find breaks, impedance bumps and
> other anomalies in cable runs.
>
> During my 20 years in the Army, I was introduced to a hugely expensive
> HP-140A oscilloscope with a TDR plug in. We used it to find cuts in our
> buried coax where the local people were digging it up for the copper
> (back in 1967). From that point on, I always wanted a TDR but they were
> way too expensive (even used) for a poor ham to even consider until I
> was introduced to the SARK by a good friend at the "OzarkCon" QRP
> convention. It paid for itself quickly by finding where a gopher (or
> mole) had chewed mostly through some buried coax I had going to a
> vertical in the back yard. The SARK's TDR pinpointed the break within a
> foot and it was probably more accurate than that as my measurements when
> following the cable were somewhat sloppy.
>
> It also makes a pretty decent signal generator as well, can be
> calibrated against WWV with not too much effort, but the minimum signal
> you can output is 50 microvolts (S9) so a good external step attenuator
> is needed along with double shielded cables to minimize feedthrough of
> the SARK's output signal. Oh yes, I did mention, it's an excellent
> antanna analyzer as well and it will do Smith Chart plots and other
> stuff too. You can control it with a computer via USB too.
>
> No financial interest in the company, just a very happy user.
>
> Jim - W0EB
>
> ------ Original Message ------
> From: "John Oppenheimer" <[hidden email]>
> To: [hidden email]
> Sent: 12/1/2017 7:23:20 AM
> Subject: Re: [Elecraft] Antenna Analyzer
>
>> The SARK 110 is very small with many features:
>>
>> http://www.sark110.com/
>>
>> John KN5L
>> ______________________________________________________________
>> 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: 7
> Date: Fri, 1 Dec 2017 07:06:20 -0700 (MST)
> From: Bob N3MNT <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=us-ascii
>
> I have had good luck with this one. Very small and works well.
> https://youkits.com/products/youkits-fg-01-1-72mhz-antenna-analyser
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
>
>
> ------------------------------
>
> Message: 8
> Date: Fri, 1 Dec 2017 14:15:19 +0000 (UTC)
> From: "Paul (Tex) Herson" <[hidden email]>
> To: [hidden email]
> Subject: [Elecraft] Eleraft list
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=UTF-8
>
> For some reason I am no longer able to post?
> 73 Texka5y
>
> ------------------------------
>
> Message: 9
> Date: Fri, 1 Dec 2017 14:36:50 +0000
> From: Sid Leben <[hidden email]>
> To: Elecraft <[hidden email]>
> Subject: [Elecraft] For sale
> Message-ID: <D646C521.337F6%[hidden email]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I have a Sark 110 Antenna Analyzer for purchase. Used twice....
>
> Cost, incl. fgt. $ 250.00 CONUS
>
> Sid Leben
> KC2EE
>
>
> ------------------------------
>
> Message: 10
> Date: Fri, 1 Dec 2017 06:46:31 -0800
> From: "Dave Cole (NK7Z)" <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Having a graph of the entire band is so helpful, The AA series make for
> a single button test... You adjust, then hit the go button. You then
> see exactly what happened to your SWR dip. Did it go too far, not far
> enough, etc.
>
> Others, you have to fuss with knobs to find the dip, then remember the
> last reading... Seems like a small item, but it is massively helpful
> when tuning up an antenna. Takes me 20 minutes to tune a 6BTV now. For
> an example of charts the AA series puts to computers see a short blog
> post I did on tuning up a 6BTV at:
>
> http://nk7z.net/notes-on-tuning-a-6btv/
>
> 73s and thanks,
> Dave
> NK7Z
> http://www.nk7z.net
>
>> On 12/01/2017 05:25 AM, Michael Walker wrote:
>> I would have to agree. the Rigexpert AA series.
>>
>> Well made, drop proof and stand alone.
>>
>> Mike va3mw
>>
>>
>>> On Fri, Dec 1, 2017 at 8:23 AM, John Oppenheimer <[hidden email]> wrote:
>>>
>>> The SARK 110 is very small with many features:
>>>
>>> http://www.sark110.com/
>>>
>>> John KN5L
>>> ______________________________________________________________
>>> 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: 11
> Date: Fri, 1 Dec 2017 09:51:05 -0500
> From: Mike Cox <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> These were very useful devices from "back in the day". I see a couple
> available on ebay by searching for "Palomar noise bridge"
>
> Mike, AB9V
>
>
>> On 12/1/2017 7:49 AM, [hidden email] wrote:
>> just a quick question for the collective group here. I have built up my KX-2 travel kit. The first week of november I took it with me to a cabin I leased outside of Gatlinburg, TN for some portable operating when I wasn?t up in the mountains hiking. I took m y Super Antenna MP-1 plus the parts to throw up a full wave loop for 40M. I did throw the loop up, and it out performed the MP-1 by kudo?s. But it struck me that it might be nice to add a small antenna analyzer to my kit.
>> I don?t need a big full size MFJ, which I do have. But something small. Any experience here y?all?
>>
>> thanks in advance for your answers
>>
>> Ronnie W5SUM
>> ______________________________________________________________
>> 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]
>
>
> ---
> This email has been checked for viruses by AVG.
> http://www.avg.com
>
>
>
> ------------------------------
>
> Message: 12
> Date: Fri, 1 Dec 2017 16:08:16 +0100
> From: "Peter Eijlander (PA0PJE)" <[hidden email]>
> To: John Harper <[hidden email]>, Elecraft list
> <[hidden email]>
> Subject: Re: [Elecraft] Antenna Analyzer (FA-VA4)
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> John,
>
> I saw that one on FunkAmateur/Box73, they sell the kit.
>
> What appeals me is the price (155 euro), the simplicity the way it can
> be built, the features, apart form being a nice graphical analyzer it's
> much more like a signal generator from 100 kHz to 100 MHz. It's readable
> in direct sunlight due to it's LCD type (like te one on a K3 even the
> same backlight color) And the power supply: it uses two AA cells.
>
> I have it and I can say: Highly recommended.
>
> 72/73
> Peter - PA0PJE
>
> PS No connection to FA/Box73...
>
>
> Op 2017-12-01 13:57 schreef John Harper:
>> I highly recommend this one - cost effective, easy to build and compares
>> favorable to more expensive models:
>> https://ae5x.blogspot.com/2017/10/new-antenna-analyzer.html
>>
>> More here:
>> https://ae5x.blogspot.com/2017/11/a-brief-comparison-of-two-antenna.html
>>
>>
>> 73,
>> John AE5X
>> ______________________________________________________________
>> 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: 13
> Date: Fri, 1 Dec 2017 07:21:47 -0800
> From: Mike Lichtman <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzers
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=us-ascii
>
> It would be nice if Elecraft had their own branded analyzer. It could be a semi kit like the
> graphing one being sold from Germany. 73 Mike KF6KXG
>
> ------------------------------
>
> Message: 14
> Date: Fri, 1 Dec 2017 15:25:17 +0000 (UTC)
> From: "Paul (Tex) Herson" <[hidden email]>
> To: [hidden email]
> Subject: [Elecraft] OT - Want to buy SideKar
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=UTF-8
>
> Looking for a clean working SideKar or SideKar Plus.? Picture and price to 79852.? Please contact offline ka5y at yahoo
> 73 Texka5y
>
> ------------------------------
>
> Message: 15
> Date: Fri, 1 Dec 2017 10:34:09 -0500
> From: "Dick Dickinson" <[hidden email]>
> To: <[hidden email]>
> Subject: [Elecraft] Antenna Analyzer
> Message-ID: <000601d36ab9$d4f95380$7eebfa80$@windstream.net>
> Content-Type: text/plain; charset="us-ascii"
>
> Thanks folks for the rundown on current small Antenna Analyzers.
>
>
>
>
>
> Dick - KA5KKT
>
>
>
>
>
> ------------------------------
>
> Message: 16
> Date: Fri, 1 Dec 2017 10:35:36 -0500
> From: "Charlie T" <[hidden email]>
> To: <[hidden email]>
> Subject: Re: [Elecraft] Eleraft list
> Message-ID: <003801d36aba$0c55b080$25011180$@erols.com>
> Content-Type: text/plain; charset="us-ascii"
>
> OK, but then, why am I seeing this?
>
> Chas
>
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Paul (Tex) Herson via
> Elecraft
> Sent: Friday, December 01, 2017 9:15 AM
> To: [hidden email]
> Subject: [Elecraft] Eleraft list
>
> For some reason I am no longer able to post?
> 73 Texka5y
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
>
>
>
>
> ------------------------------
>
> Message: 17
> Date: Fri, 1 Dec 2017 10:38:42 -0500
> From: Mark Tosiello <[hidden email]>
> To: [hidden email]
> Subject: [Elecraft] Happiness is a new Elecraft Purchase
> Message-ID:
> <CA+W3KhHJSr4sVsT18=5gG7_31Z3m5L0M5P8cHjvcF9=[hidden email]>
> Content-Type: text/plain; charset="UTF-8"
>
> Hi folks!
>
> Just thought I'd post a note and a quick, hopefully easy question. I'm the
> proud owner of a KX3/PX3 pair, which I built from kit. This is some
> seriously great equipment. I was thinking that I'd LOVE to use the KX3 in
> situations where I need a BIT more than 15 watts (various contests or
> chasing DX). My 100 watt go-to radio is an IC-746 Pro, but I wanted to take
> advantage of the great receiver on the KX3. An amp was surely in my
> future, so I pulled the trigger this morning and purchased the KXPA100 with
> internal ATU!! This one's going to be factory-built. I'm REALLY looking
> forward to using the full 100w system. Mys radios feed a HexBeam, Gap
> Challenger and 80m loop. Can't wait!
>
> Are there any tips, tricks or is there any advice the Elecraft family has
> for using and getting the most out of the KXPA 100?
>
> Thanks!
>
> Mark KD8EDC
>
>
> ------------------------------
>
> Message: 18
> Date: Fri, 1 Dec 2017 20:47:46 +0500
> From: Igor Sokolov <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> +1
>
> 73, Igor UA9CDC
>
>
> 01.12.2017 18:23, John Oppenheimer ?????:
>> The SARK 110 is very small with many features:
>>
>> http://www.sark110.com/
>>
>> John KN5L
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
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>> .
>>
>
>
>
> ------------------------------
>
> Message: 19
> Date: Fri, 01 Dec 2017 06:53:28 -0900
> From: Edward R Cole <[hidden email]>
> To: Elecraft Reflector <[hidden email]>
> Subject: Re: [Elecraft] K3 PRE function question
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Just my observations on 6m with only the internal PRE on my K3
> (purchased circa 2010):
>
> I noticed a lack of sensitivity on 6m. I had a ARR P50VDG preamp
> with 22-25 dB of gain which worked better than the internal
> PRE. That gave me about 12 dB more gain compared with running the
> PRE. Also lower NF (typ. 0.5 dB).
>
> I then purchased a PR6-10 and that helps considerably over using the
> PRE. I have used my K3+PR6-10 for copying 6m-eme signals with a
> single yagi (6-element) so that speaks well of the PR6-10. I use the
> ARR preamp mounted at tower top for eme and it is a little bit better
> (has more gain) on very weak eme signals using JT65. I use DIGOUT-1
> to control my PR6-10 and use the pass-thru connections for the
> ARR. That adds nice convenience for using the two preamps.
>
> I have a second smaller 6m yagi which I use the PR6-10, only. BTW
> this is equal to my KX3 with preamp ON (which says a lot for the KX3).
>
> My opinion is the PR6-10 makes the K3 better on higher bands than the
> internal PRE (which I leave off). If you are considering getting one
> its a good (if not essential) upgrade for the original K3 on 6m and
> 10m. Yes, you will see a small rise in the noise reading on the
> s-meter (due to more gain), but sensitivity is improved more than
> that (due to lower NF). I see about S3-4 noise floor on 6m with the
> PR6-10 and S5 with the ARR. PRE runs maybe S1 (a guess as I haven't
> used it for some time).
>
> 73, Ed - KL7UW
> --------------------------------------------
>
> Date: Thu, 30 Nov 2017 07:25:09 -0500
> From: Randy Lake <[hidden email]>
> To: Elecraft List <[hidden email]>
> Subject: [Elecraft] K3 PRE function question
> Message-ID:
> <CACnmA1PE1UX0MRuU=[hidden email]>
> Content-Type: text/plain; charset="UTF-8"
>
> This is a pretty simple question regarding the K3 PREamp (not PR6). If I do
> not have the PR6 does the PRE on the front panel help with RX on 6m/2m (int
> module) or does it merely increase noise?
> Thanks
>
>
> 73, Ed - KL7UW
> http://www.kl7uw.com
> Dubus-NA Business mail:
> [hidden email]
>
>
>
> ------------------------------
>
> Message: 20
> Date: Fri, 1 Dec 2017 11:03:49 -0500
> From: GRANT YOUNGMAN <[hidden email]>
> To: Edward R Cole <[hidden email]>
> Cc: Elecraft Reflector <[hidden email]>
> Subject: Re: [Elecraft] K3 PRE function question
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=us-ascii
>
> Do you have the KXV3B with the new/improved preamp installed? I not, you should consider it.
>
> Grant NQ5T
> K3 #2091, KX3 #8342
>
>
>> On Dec 1, 2017, at 10:53 AM, Edward R Cole <[hidden email]> wrote:
>>
>> Just my observations on 6m with only the internal PRE on my K3 (purchased circa 2010):
>>
>> I noticed a lack of sensitivity on 6m. I had a ARR P50VDG preamp with 22-25 dB of gain which worked better than the internal PRE. That gave me about 12 dB more gain compared with running the PRE. Also lower NF (typ. 0.5 dB).
>>
>
>
>
> ------------------------------
>
> Message: 21
> Date: Fri, 1 Dec 2017 09:16:53 -0700 (MST)
> From: Ignacy <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer (FA-VA4)
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=us-ascii
>
> The choice of analyzers is not that simple unless cheap price is the only
> factor.
>
> I have four analyzers: Rigexpert 230Pro, FA-VA4, VNWA3 and Mini60.
>
> Rigexpert covers up to 230 MHz and costs about $500. It is the easiest to
> use and has the most functionality. Less accurate because it does not have
> OLS calibration and is pretty big, but new models (Zoom) have calibration
> and are much lighter. Seems rain resistant. Coax testing for short and
> length is a blessing. I use it most of the time.
>
> VNWA3 covers > 1300 MHz and costs about $600 but needs a computer. Often
> requires multiple calibrations requiring an hr. Has two port for filters and
> beam testing. I use it only when nothing else works.
>
> FA-VA4 works up to 100 MHz and is very accurate after good calibration
> (included 50 Ohm load is not too good). Light but not the smallest. Getting
> things done takes many buttons. Not waterproof. Also. soldering is tricky
> and I wonder whether bad soldering will show up one time. I use FA-VA4 for
> portable measurements where accuracy is important. For instance impedance of
> inv L on 160m. Measure impedance, prepare appropriate coil, and no extra
> fine tuning needed. Also very useful to measure properties of toroids across
> frequency.
>
> I also have mini60 that works up to 60 MHz, is very small, can be charged
> via USB, and interfaces with Android phone, and costs $100. SWR accuracy is
> good but X is not. I leave it for travel.
>
>
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
>
>
> ------------------------------
>
> Message: 22
> Date: Fri, 1 Dec 2017 09:52:11 -0700
> From: Mark Goldberg <[hidden email]>
> To: Elecraft Mailing List <[hidden email]>
> Subject: Re: [Elecraft] Antenna Analyzer (FA-VA4)
> Message-ID:
> <[hidden email]>
> Content-Type: text/plain; charset="UTF-8"
>
> I have one more suggestion. I have a MiniVNA Tiny, expensive at about $600,
> but it is a full two port Vector Network Analyzer in a 2.5" X 2.5" X 1" box
> connected via USB. It has both a computer app and a phone app to run it. I
> have taken it out in the field where I would never consider taking a 75 lb
> VNA. I have used it to analyze antennas, filters, transmission lines and to
> characterize caps and inductors over frequency.
>
> 73,
>
> Mark
> W7MLG
>
>> On Fri, Dec 1, 2017 at 9:16 AM, Ignacy <[hidden email]> wrote:
>>
>> The choice of analyzers is not that simple unless cheap price is the only
>> factor.
>>
>> I have four analyzers: Rigexpert 230Pro, FA-VA4, VNWA3 and Mini60.
>>
>> 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: 23
> Date: Fri, 1 Dec 2017 10:04:53 -0700
> From: Doug Person <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> I have several antenna analyzers. The best value I think is the YouKits
> FG-01 <https://www.vibroplex.com/contents/en-us/p190.html> . It's price
> is on the lower end of the scale. It's color display and feature set are
> outstanding. I also have the MFJ 223 which is very compact and highly
> functional. These two are particularly good for travel due to their very
> small size.
>
> 73, Doug -- K0DXV
>
>
>> On 12/1/17 8:34 AM, Dick Dickinson wrote:
>> Thanks folks for the rundown on current small Antenna Analyzers.
>>
>>
>>
>>
>>
>> Dick - KA5KKT
>>
>>
>>
>> ______________________________________________________________
>> 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: Fri, 1 Dec 2017 17:19:00 +0000
> From: George Thornton <[hidden email]>
> To: Jim Sheldon <[hidden email]>, "[hidden email]"
> <[hidden email]>
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID:
> <[hidden email]>
>
> Content-Type: text/plain; charset="us-ascii"
>
> The Time Domain Reflectometer (TDR) is a hugely important feature, and is now available with other brands, including some of the RigExpert models.
>
> I do a lot of field work with both HF and VHF/UHF. In my experience most of the problems I have encountered have been traced to cable defects of one kind or another. The TDR function allows you to quickly and reliably test the integrity of cabling, allowing you to identify the exact location of the defect.
>
> I am partial to the RigExpert models, which have been reliable and accurate, and very easy and intuitive to use.
>
> My only quarrel with RigExpert is that they do not offer water resistant sealed cases. These can get damaged in a wet environment.
>
>
>
> T-----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of Jim Sheldon
> Sent: Friday, December 1, 2017 5:39 AM
> To: [hidden email]
> Subject: Re: [Elecraft] Antenna Analyzer
>
> I was introduced to the SARK-110 several years ago and besides being an excellent antenna analyzer, it had one feature that nobody else had (when I bought the SARK) and that is called a "Time Domain Reflectometer". This allows you to find breaks, impedance bumps and other anomalies in cable runs.
>
> During my 20 years in the Army, I was introduced to a hugely expensive HP-140A oscilloscope with a TDR plug in. We used it to find cuts in our buried coax where the local people were digging it up for the copper (back in 1967). From that point on, I always wanted a TDR but they were way too expensive (even used) for a poor ham to even consider until I was introduced to the SARK by a good friend at the "OzarkCon" QRP convention. It paid for itself quickly by finding where a gopher (or
> mole) had chewed mostly through some buried coax I had going to a vertical in the back yard. The SARK's TDR pinpointed the break within a foot and it was probably more accurate than that as my measurements when following the cable were somewhat sloppy.
>
> It also makes a pretty decent signal generator as well, can be calibrated against WWV with not too much effort, but the minimum signal you can output is 50 microvolts (S9) so a good external step attenuator is needed along with double shielded cables to minimize feedthrough of
> the SARK's output signal. Oh yes, I did mention, it's an excellent
> antanna analyzer as well and it will do Smith Chart plots and other stuff too. You can control it with a computer via USB too.
>
> No financial interest in the company, just a very happy user.
>
> Jim - W0EB
>
> ------ Original Message ------
> From: "John Oppenheimer" <[hidden email]>
> To: [hidden email]
> Sent: 12/1/2017 7:23:20 AM
> Subject: Re: [Elecraft] Antenna Analyzer
>
>> The SARK 110 is very small with many features:
>>
>> http://www.sark110.com/
>>
>> John KN5L
>> ______________________________________________________________
>> 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: 25
> Date: Fri, 1 Dec 2017 12:09:48 -0500
> From: Ken Alexander <[hidden email]>
> To: "[hidden email]" <[hidden email]>
> Subject: [Elecraft] K1 price?
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Hi Folks,
>
> I have a K1 that I'd like to put up for sale. I don't remember what
> they sold for originally and I'd like to price it fairly. It has a
> 4-band filter board and I think I can dig out the original 2-band board
> too. Any help would be appreciated.
>
> Thanks and 73,
>
> Ken Alexander
> VE3HLS
>
>
>
> ------------------------------
>
> Message: 26
> Date: Fri, 1 Dec 2017 11:31:37 -0600
> From: Ronnie Hull <[hidden email]>
> To: George Thornton <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=us-ascii
>
> Yes SMALL and PORTABLE is what I am interested in. I never wanted a TDR. Rig experts are fine analyzes but out of the league of what I want which is something to toss in my "go" bag
>
> Ronnie W5SUM
>
> Sent from my iPhone
>
>> On Dec 1, 2017, at 11:19 AM, George Thornton <[hidden email]> wrote:
>>
>> The Time Domain Reflectometer (TDR) is a hugely important feature, and is now available with other brands, including some of the RigExpert models.
>>
>> I do a lot of field work with both HF and VHF/UHF. In my experience most of the problems I have encountered have been traced to cable defects of one kind or another. The TDR function allows you to quickly and reliably test the integrity of cabling, allowing you to identify the exact location of the defect.
>>
>> I am partial to the RigExpert models, which have been reliable and accurate, and very easy and intuitive to use.
>>
>> My only quarrel with RigExpert is that they do not offer water resistant sealed cases. These can get damaged in a wet environment.
>>
>>
>>
>> T-----Original Message-----
>> From: [hidden email] [mailto:[hidden email]] On Behalf Of Jim Sheldon
>> Sent: Friday, December 1, 2017 5:39 AM
>> To: [hidden email]
>> Subject: Re: [Elecraft] Antenna Analyzer
>>
>> I was introduced to the SARK-110 several years ago and besides being an excellent antenna analyzer, it had one feature that nobody else had (when I bought the SARK) and that is called a "Time Domain Reflectometer". This allows you to find breaks, impedance bumps and other anomalies in cable runs.
>>
>> During my 20 years in the Army, I was introduced to a hugely expensive HP-140A oscilloscope with a TDR plug in. We used it to find cuts in our buried coax where the local people were digging it up for the copper (back in 1967). From that point on, I always wanted a TDR but they were way too expensive (even used) for a poor ham to even consider until I was introduced to the SARK by a good friend at the "OzarkCon" QRP convention. It paid for itself quickly by finding where a gopher (or
>> mole) had chewed mostly through some buried coax I had going to a vertical in the back yard. The SARK's TDR pinpointed the break within a foot and it was probably more accurate than that as my measurements when following the cable were somewhat sloppy.
>>
>> It also makes a pretty decent signal generator as well, can be calibrated against WWV with not too much effort, but the minimum signal you can output is 50 microvolts (S9) so a good external step attenuator is needed along with double shielded cables to minimize feedthrough of
>> the SARK's output signal. Oh yes, I did mention, it's an excellent
>> antanna analyzer as well and it will do Smith Chart plots and other stuff too. You can control it with a computer via USB too.
>>
>> No financial interest in the company, just a very happy user.
>>
>> Jim - W0EB
>>
>> ------ Original Message ------
>> From: "John Oppenheimer" <[hidden email]>
>> To: [hidden email]
>> Sent: 12/1/2017 7:23:20 AM
>> Subject: Re: [Elecraft] Antenna Analyzer
>>
>>> The SARK 110 is very small with many features:
>>>
>>> http://www.sark110.com/
>>>
>>> John KN5L
>>> ______________________________________________________________
>>> 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]
>> ______________________________________________________________
>> 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: 27
> Date: Fri, 1 Dec 2017 12:32:19 -0500
> From: Michael Walker <[hidden email]>
> To: George Thornton <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Subject: Re: [Elecraft] Antenna Analyzer
> Message-ID:
> <CA+33ts7ax8Prqk57mirT82+EGydva7ik=[hidden email]>
> Content-Type: text/plain; charset="UTF-8"
>
> The RigExpert AA-1400 fits perfectly in a $40 Pelican 1200 case.
>
> I have mine, charger, batteries, etc in a nice Red 1200.
>
> I would post a pic, but you can't on this reflector.
>
> Mike va3mw
>
>
> On Fri, Dec 1, 2017 at 12:19 PM, George Thornton <
> [hidden email]> wrote:
>
>> The Time Domain Reflectometer (TDR) is a hugely important feature, and is
>> now available with other brands, including some of the RigExpert models.
>>
>> I do a lot of field work with both HF and VHF/UHF. In my experience most
>> of the problems I have encountered have been traced to cable defects of one
>> kind or another. The TDR function allows you to quickly and reliably test
>> the integrity of cabling, allowing you to identify the exact location of
>> the defect.
>>
>> I am partial to the RigExpert models, which have been reliable and
>> accurate, and very easy and intuitive to use.
>>
>> My only quarrel with RigExpert is that they do not offer water resistant
>> sealed cases. These can get damaged in a wet environment.
>
>
> ------------------------------
>
> _______________________________________________
> 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 164, Issue 2
> ****************************************