Grant,
A very interesting setup on that vertical!
I'm extending an existing 43-foot vertical to get a marginally better
and easier to feed antenna for 80/75 while still being suitable for 40m,
which at present is my favorite band. I don't know what top loading the
53-foot vertical would do to 40m performance and I worry about feeding
it on 40m. I'll model that to see. Its an intriguing possibility.
Its true that the smaller values of the CDV16 line are somewhat current
challenged. But it looks like I could put some higher valued parts in
series to overcome that.
I appreciate your input.
--
Art Greenberg
WA2LLN
art@artg.tv
On Mon, Aug 14, 2017, at 10:24, Grant Saviers wrote:
> I match my top loaded 160m T with switched series capacitors and PCB
> relays. I run QRO (SSB QSO's with ZL's yesterday, - yea for conditions).
> My match covers most all the band in four steps, no inductors, 3 series
> switched 4000pf values. It wouldn't take much top loading to get your
> 53' vertical resonant at 3.55MHz or so and use the same idea for tuning
> the entire band. I'll send off line a note I wrote about this.
>
> CDE CDV16 are higher rated current silver micas.
> http://www.cde.com/resources/catalogs/PULSE-MICA.pdf However, for the
> low end of that range currents are well below QRO or circulating current
> levels. You might try ebay for some ex military transmitter doorknob
> silver micas from Eastern Europe.
>
> Grant KZ1W
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|