Nils Petter Pedersen wrote:
> Hi Steve !
> Well... according to a red coloured note I found in the
> original Eimac box when ordering some 4CX250's many
> years ago,- those tubes contained BeO.
> According to that note the premises should be immediately
> evacuated and Eimac called if a tube seal cracked !!!!
Interesting. In the 4CX250s I've opened up, I don't recall seeing
any ceramic in the grid support structures - but these would have
been 60/70s date codes. As you say, maybe the original design was
different.
Steve
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