>
>Thanks to all who responded to my query. It seems the tubes may be
>TB3/750 which are
>similar to the 3-500Z.
>
? John: Did you notice that the Mu is 25 for the TB3/750?
The Mu of a typical 3-500Z is 130 - 190. A tube with a Mu of 25 is not
going to work in a grounded-grid amplifier.
>I have passed on the info to the ham concerned. Once again tks.
>
>John ZS5JF
- Rich..., 805.386.3734, www.vcnet.com/measures.
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