>It has been suggested I add a string of diodes in the
>center tap of the Filament Transformer in my Swan Mark
>1 amplifier for bias. This is a Zero Bias amp but
>bias is suggested anyway to ensure a stable bias
>voltage. The tubes in use are a pair of 3-400Z tubes
>in GG.
3-400Zs have a Mu of c. 190. They have a ZSAC of c. 80mA each at 3kVDC
and 0V g-fil bias. Less ZSAC is ok for CW, but not ok for SSB.
>
>I like to gather a variety of opinions on questions
>like this because I learn so much from the various
>opinions.
>73,
>Bill
>
>=====
>Bill Smith KO4NR
>
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- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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