I find the ZSAC to run approximately 75 mils at this operating point... A
little higher if you run the higher perveance flavors of the 4CX250 family.
Toll Free
>>Too low. The plate and screen voltages are OK, but the grid bias is too
>>negative for the recommended ZSAC of 100mA... which is *another* thing
>>that's important for linearity.
Tom Rauch wrote:
>
>>The 4CX250B runs up to 400 volts on the screen.
>>
>>I have run 2500 volts on the anode.
>>
>>Runs very well with 2200Kv on plate, 350V on screen and grid between -60
>>to -80V.
>
>What is the zero signal idling current of the tube anode at those
>voltages?
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.com/g3sek
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