>
>Now when EIMAC 3-500Zs are hard to get cheap, a direct replacement has been
>suggested: a hi mu triode connected 4-400A. I can get the PHILIPS and
>SIEMENS equivalents with graphite anodes (RS 1002A etc) and wonder if
>anybody has seen any distorsion measurments for these tubes in grounded grid
>hi mu connected?
With a 4-250A or 4-400A, it takes c. 75mA of ZSAC for good linearity. In
order to obtain 75mA of ZSAC with 0v bias, one needs c. 3500v.
>The whole family of this series can be connected in the same way: 4-250A,
>4-400A and 4-1000A. ...
The 4-1000A is not part of this series.
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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