>>The 4-1000A has an output impedance of 4600 Ohms (according to Eimac) at
>>5KV anode voltage.
>>
>? RL depends on the ZSAC. With higher idle current, RL decreases.
>Using RL=DCV/2 x I-anode, at 0.8A, RL=3.125k-ohms. Designing for a Q of
>15 at 28MHz, a Pi-L with an intermediate Z of 300-ohms, XC1=208 ohms,
>C1=26pF. L1=1.5uH. L2=0.64uH. C-load=129pF. Subtracting 10pF for the
>C-anode + stray C, C-tune is 18pF. The min. C of a UCS-300 is 5pF. Have
>I missed something?
Whoa! You suggest running the ZSAC at 0.8 Amps??? All the specs show it at
100 mA. You are talking about a HUGE amount of bias current and poor
efficiency to boot.
IMHO, 0.8A of ZSAC isn't really realizable.
Did I miss something?
73,
Jon
KE9NA
--------------------------------------------------------------------------
Jon Ogden
jono@enteract.com
www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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