[HomeBrew] 833 grouned grid?

Tue, 22 Jan 2002 20:38:08 -0500

  No.  The 833 Mu rating is too low for cathode drive
operation. That tube is pretty much worthless above
about 6 or 7 Mhz anyway, better off making a lamp out of it.

73,  Mark  WB8JKR

On Tue, 22 Jan 2002 19:09:41 -0500 "Eric Hughes" <[email protected]>
writes:
> 
> Hello all,
> Has anyone on the list built or used the 833 tube in
> a grounded grid amp? I cant find any information on
> the data sheets or circuits in old issies of CQ, QST and
> 73. I need some advise from someone who has experience using this 
> type of
> triode in GG service. I have
> plenty of tubes and a 30 amp filiament transformer. My idea was to 
> use two
> tubes in grounded grid to simplify the construction.  But, I am 
> worried that
> the tube will not be happy without the -70 volts bias specified in 
> the data
> sheets? I dont want to destroy the tubes on first power
> up. Will GG operation be possible with the 833?
> Thanks, Eric
> 
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