Re: [TowerTalk] Fwd: Bandwidth of a 1/4wl 80m vertical

["Rick Karlquist" <richard@karlquist.com>]

I used a 250 pF transmitting mica (WWII surplus).
It gives about 250 kHz shift.
That gave me good enough SWR to cover the whole
band.

Rick N6RK


Glenn Thorne wrote:
> What kind of caps and values did you use?
>
> Thanks.
>
> 73, Glenn/KD0Q
> ----- Original Message -----
> From: "Richard (Rick) Karlquist" <richard@karlquist.com>
> To: <miroslav.sibilja@amis.net>
> Cc: <HansLG@aol.com>; <>; "jimlux" <jimlux@earthlink.net>
> Sent: Tuesday, March 17, 2009 10:04 AM
> Subject: Re: [TowerTalk] Fwd: Bandwidth of a 1/4wl 80m vertical
>
>
>> Mirko S57AD wrote:
>>> Well, how about approach, emtioned even in ON4UN's book - make vertical
>>> resonant in CW part of band, short it with series capacitor to be
>>> resonant in SSB portion of the band. Relay, switching in shortening
>>> capacitor may (at CW portion of band) add piece of phasing line to keep
>>> correct phasing at both portions of the band.
>>>
>>> 73  Mirko, S57AD
>>
>> I have an inverted vee with this setup.  Works great.
>>
>> Rick N6RK
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