>
>
>> Many questions were asked about the construction and cicuitry in the
>> amplifier (actually it's an oscillator at the moment). I will try to
>> start at the input. There is 4 inches of RG-174 coax feeding a .01 cap
>> going directly to the cathode/heater pin of the tube socket. There is
>> another .01 across the filament of the tube and it is mounted directly
>> to the pins of the Eimac socket. All of the grid pins are shorted
>
>Is there an antenna relay? What type?
>
>BTW, you get a lower impedance driving the filament if you split the
>two .01 capacitors to a common point and feed it there, instead of
>having one across the filament and one in series with the source. I
>hope that coax is grounded at the socket, and you do need a tuned
>input near the tube that is a low-pass or band-pass type with a low
>VHF impedance at the cathode. That means a C-L-C pi or a
>parallel tuned network.
>
? Mr. Rauch: Is a parallel resonant circuit a low pass filter?
>> ...
>...
cheers
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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