zeitler@ibm.net wrote:
>
> When my Swan Mark II is in the xmit mode, I get a high plate current and
> grid current reading as I tune the plate tune and load caps throughout their
> tuning range. Only on 15 and 10 meters. Also with the more plate I that is
> "tuned' the plates of the tubes start to really glow bright red. All this
> happens with NO rf input. What is it? Time for more parasitic osc.
> suppression stuff? It is rock stable on 80-40 and 20.
Probably time for fundamental frequency neutralizing stuff. Use a GDO as an
absorbtion wavemeter to find out, with reduced plate v so as not to damage the
tubes.
73,
Vic, K2VCO
Fresno CA
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|