[VHFcontesting] FN55 - Transverter drive control?

[Mark Spencer]

Hi All.   I've started down this road (my radios with dedicated  transverter  connections don't put out out enough power from the transverter ports to run the transverters I want to use, plus I have a radio I want to use as an IF radio that doesn't have a transverter port.)

I've used coax plus a medium sized power attenuator to drive a transverter with the IF radio at more or less full power.  I'm reluctant to rely on the power level control on the IF radio for this application and have been told by others that the "spectral purity" of some radios may suffer if they are run at lower than designed power levels.   

Over the years I've picked up a number of coaxial relays (mostly used at swap meets for less than $20.00 each) so switching the attenuation out during receive isn't a major issue for me.   

(Coaxial relays may be over kill for switching attenuators in and out  at a 28 MHz IF frequency but I'd rather use what I have at this point.  There are articles on the web about using in expensive relays for RF switching.)

Good luck

Mark S

VE7AFZ

> On Feb 4, 2017, at 2:10 PM, Jonesy W3DHJ via VHFcontesting <vhfcontesting at contesting.com> wrote:
> 
>> On Sat, 4 Feb 2017, Mike (KA5CVH) Urich wrote:
>> 
>>> On Sat, Feb 4, 2017 at 1:04 PM, N1BUG <paul at n1bug.com> wrote:
>>> 
>>> High power attenuators are expensive and I don't like to be generating 100W
>>> on the IF frequency.
>> 
>> I've never done this myself but I've heard of people using a run of
>> high LOSS feedline between the two to act as an attenuater.
> 
> The attenuation needed would make for a very quiet receiver operation.
> 
> Jonesy
> -- 
>  Marvin L Jones     | W3DHJ      | W3DHJ  | https://W3DHJ.net/
>   Pueblo, Colorado  |  @         | Jonesy |     __
>    38.238N 104.547W |   jonz.net | DM78rf | 73  SK
> _______________________________________________
> VHFcontesting mailing list
> VHFcontesting at contesting.com
> http://lists.contesting.com/mailman/listinfo/vhfcontesting
>