An 813's grid-resonance and screen-resonance are above its f-max of
30MHz, which is probably why I have not yet heard about a parasite with
the 813 in g-g config.
-- (4) 813s is a good choice for SSB.
>
>Aquiring parts for a 160 amplifier. Planning on (4) 813's with a tank
>circuit of 11 mh and 1000pf, but I've seen plate chokes from 47 ohms
>to 220 ohms and 2 turns up to 8 turns. I've also seen Amidon beads.
>Is there a formula for paracitics below 30 Mhz?
>
>Geo W7LFD
>
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>
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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