[Amps] 3-500ZG brands

[Clay W7CE]

I apologize for the delay in completing this thread, but life has been very
busy lately.  What appeared to be a bad tube, was actually just a bad
contact with the tube socket.  The amp had been sitting for some time.  I
removed and re-inserted the tubes into the sockets, and everything is
working fine now.  I'm getting about 1200-1300W PEP out and am quite happy.
Thanks to all for the advice and thanks Rich for offering to look at the
tube for me.

Clay  W7CE


----- Original Message -----
From: "R.Measures" <r at somis.org>
To: "Clay W7CE" <w7ce at curtiss.net>
Cc: <amps at contesting.com>
Sent: Thursday, August 12, 2004 3:45 AM
Subject: Re: [Amps] 3-500ZG brands


>
> On Aug 11, 2004, at 7:04 PM, Clay W7CE wrote:
>
> > I've just acquired a Kenwood TL-922A which needs a new pair of finals
> > (one
> > of the filaments doesn't light up).
>
> Clay -- Please mail me the tube with the open filament.  I will repair
> it if possible, or, if not, autopsy it and post the picture of the guts
> on my Web site.
>
> > Does anyone have experience using the
> > Taylor or RF Parts branded 3-500ZG tubes in this amp?  Does the
> > cathode bias
> > need to be changed when switching to the 3-500ZG?
>
> Not if the ZSAC is 75mA to 90mA per tube.  However, the stock 7.5v

> zener in the 922) will usually be too much bias V.  -- i. e., not
> produce enough ZSAC.
> -  end
>
> > Any recommendations will
> > be appreciated.
> >
> > Thanks,
> > Clay  W7CE
> >
> > _______________________________________________
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> >
> >
> Richard L. Measures, AG6K, 805.386.3734.  www.somis.org
>