[Amps] Chinese FU-724F

gdaught6 at stanford.edu gdaught6 at stanford.edu
Wed Nov 27 11:53:23 EST 2013

Hsu wrote...

> I found a Chinese cheap triode for industry, filamnet 6V/50A;
> Pamax=2.5kW; Grid diss=150W;Umax=6kV;
> u=70, you know most industrial triodes are low/ meidum u tubes, but
> this one is high u tube.
> As it is  idustial tube , so the  price is cheap.Any suggestion?does
> it  fit hamradio well?

Look at the mu (amplification factor) for the 3-500Z, or the 8877, for example:  160 
and 200.  With a mu of 70, it will take considerably more drive power than what is 
usual for amateur service.


George T Daughters, K6GT
CU in the California QSO Party (CQP)
October 4-5, 2014

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