[HomeBrew] 833 grouned grid?

Wed, 23 Jan 2002 22:19:25 -0600

I totally agree with the comments from others that the 833 is not a good
candidate for grounded grid operation.  However, I must disagree with the
comment that the tube is impractical over 40 meters.  Many moons ago (circa
1962) I ran one of these tubes on 20 meters.
Dick W5TA

----- Original Message -----
From: "Eric Hughes" <[email protected]>
To: <[email protected]>
Sent: Tuesday, January 22, 2002 6:09 PM
Subject: [HomeBrew] 833 grouned grid?

>
> 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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