[Amps] *** SPAM *** Re: 2 x 4-250A Amp

[Peter Chadwick]

Hsu,
>I have a pair Mulard TB3.5/750( 4-250A), <
As far as I am aware, all the 'T' series numbers from Mullard and Philips are triodes. I can't find a data sheet for TB3.5/750: there is a TB3/750, which is medium mu triode (mu =25).
Using 4-250 instead of 3-500Z means exceeding the plate dissipation for the same maximum power output: the gain may well be different, though.
73
Peter G3RZP