>
>Hi Gang:
>I should get this thing going. But first, I need:
>
>Filament xfmr, p/n 54-238
When a tube grid/fil. shorts in a SB-220, the unfused 5v filament/relay
110v PS transformer usually melts down. To prevent this possibility with
the new transformer, convert the cutoff bias method from voltage-cutoff
to resistor-cutoff, [see article on my Web site]
>Multimeter, p/n 407-146
>(I think the plate current meter, p/n 407-145, has the same specs)
>
They are both 200uA movements. The same movement was also used in other
Heathkits.
>...
good luck, Ralph
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
end
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