http://elecraft.85.s1.nabble.com/Matching-resonant-antennas-tp7663149p7663367.html
death. Walt and his sons were/are some of the finest gentlemen that you
could ever meet. Walt was the type of person who was friends with
everyone he meet. It was a great loss to mankind and amateur radio when
> M. Walter Maxwell, W2DU (SK) passed away in 2012 at the age of 93. He was still active.
>
> ARRL has a brief bio here:
>
>
http://www.arrl.org/news/walt-maxwell-w2du-sk-wrote-reflections>
> 73
> Lyn, W0LEN
>
>
> -----Original Message-----
> From:
[hidden email] [mailto:
[hidden email]] On Behalf Of Lyn Norstad
> Sent: Saturday, July 18, 2020 1:10 PM
> To: 'Ted Roycraft'; 'Elecraft List Server'
> Subject: Re: [Elecraft] Matching resonant antennas
>
> The 428 page "Reflections III" from 2010 is available here in PDF format:
>
>
http://www.w3pga.org/Antenna%20Books/Reflections%20III.pdf>
> 73
> Lyn, W0LEN
>
>
> -----Original Message-----
> From:
[hidden email] [mailto:
[hidden email]] On Behalf Of Ted Roycraft
> Sent: Saturday, July 18, 2020 10:22 AM
> To: Elecraft List Server
> Subject: Re: [Elecraft] Matching resonant antennas
>
> Walter Maxwell’s interesting book, “Reflections”, has an in-depth
> discussion on non-resonant antennas and tuners. Highly recommended.
>
> 73, Ted, W2ZK
>
> On Sat, Jul 18, 2020 at 10:05 AM Lyn Norstad <
[hidden email]> wrote:
>
>> Exactly.
>>
>> -----Original Message-----
>> From: W2xj [mailto:
[hidden email]]
>> Sent: Saturday, July 18, 2020 7:37 AM
>> To:
[hidden email]
>> Cc:
[hidden email];
[hidden email]
>> Subject: Re: [Elecraft] Matching resonant antennas
>>
>> What is changing is the radiation pattern. As the frequency increases the
>> pattern becomes more sidelobes. Some of those sidelobes are bigger than the
>> main lobe and they radiate ‘somewhere’.
>>
>> Sent from my iPhone
>>
>>> On Jul 17, 2020, at 21:19, Lyn Norstad <
[hidden email]> wrote:
>>>
>>> Barry -
>>>
>>> +1
>>>
>>> I use nothing but 600 ohm OWL (True Ladder Line) and a short piece of
>> coax connects to a 1:1 / 4:1 hybrid balun to allow matching the impedance
>> perfectly with my KAT500.
>>> The antenna is a 360' center fed EDZ (design frequency of 3.5 MHz). The
>> KAT500 matches it on all bands 160 - 6m (on 15m, it bypasses).
>>> The measured performance indicates excellent radiation on all bands.
>>>
>>> 73
>>> Lyn, W0LEN
>>>
>>>
>>> -----Original Message-----
>>> From:
[hidden email] [mailto:
>>
[hidden email]] On Behalf Of Barry LaZar
>>> Sent: Friday, July 17, 2020 7:44 PM
>>> To:
[hidden email]
>>> Subject: Re: [Elecraft] Matching resonant antennas
>>>
>>> Wes,
>>>
>>> You're correct that open wire/ladder line transmission lines are
>>> not a panacea. But, in the average ham stations, open wire does overcome
>>> high losses with high SWR, or not so high SWR. What is needed is a look
>>> at the ARRL Antenna book for transmission line loss/100 ft. as a
>>> function of SWR. You see that on 10 meters running 10:1 SWR the total
>>> loss is around 1 db. And, as you go to the lower bands, losses become
>>> less. Typical 400 Ohm ladder line has a loss of 0.2 db at 10 MHz and 0.6
>>> db at 100 MHz. Using these data and a little interpolation, I would use
>>> 0.4 db on 10 meters and a 10:1 SWR for this to be 0.8 db of additional
>>> loss for a total of about 1.2 db. Yes, I do use a balun and recommend
>>> them so add another 0.5 db. Add another 0.5 db for a good tuner and we
>>> end up with a total of 2.2 db. on 10 meters and less on 20 and it
>>> decomposes to an academic exercise on 40 and down.
>>>
>>> Coax on 10 starts out with a higher loss/100 feet. I will use what
>>> I use here in K3NDM, Times LMR400. That represents 0.4 at 10 MHz. and
>>> 1.4 db at 100 MHz. That will yield about 1.2 db/100 ft on 10 meters. Add
>>> 0.25 db for a 2:1 SWR and 0.5 for tuner loss and you end up with about
>>>
>>
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