[Amps] more dangers in our shack

[Steve Thompson]

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