[Amps] 4-250A in Drake L4-B ?

[R.Measures]

With 0v bias, the 4-250A needs about 3500v in g-g in order to have 
enough ZSAC.  If there is enough room for adding a 350V, 1A-rms 
transformer to put in series with the HV transformer's secondary, you 
should have enough V to do the job.  Also, connect a 10-ohm 3w MOF 
resistor between pins 2 - 3, and 3 - 4 to convert the tetrode to a 
triode.

On Jan 12, 2005, at 3:45 PM, G.La Parola, IT9BLB wrote:

> Does someone have any pratical suggestion to use
> a couple of 4-250A in a Drake L4-B amplifier?
>
> Thanks in advance for any help.
>
> Joe, IT9BLB
>  
>
>
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org