[Amps] 160 output problem

[John T. M. Lyles]

Sorry about that, last amplifier in this freq range I built had the 
pi network for 500 ohms at the anode, so I remembered using 20,000 pF 
or something in that range. Rich is correct that for a 2K-3K plate 
load, the blocker can be smaller in value. Also the current through 
your cap is probably lower than the 40 Amps of plate current I was 
using.

Goodluck Lynn, look for something else. give it time and maybe smoke 
will eminate from your problem.

John
K5PRO


>Sounds like output coupling is not happening, if grid current is
>  >higher on 160 and output is lower. Calculate the reactance of your
>>blocker capacitor, for one thing. I get about 49 ohms at 1.8 MHz,
>>which is excessive.
>
>**  In a 2000-ohms or so circuit, 49 reactive ohms is hardly significant,
>John.
>
>>One ususally sees about 10 x this value of
>>capacitance as an anode blocker for high power at 1-2 MHz.
>>
>>73
>>K5PRO
>  >John