[Amps] 'gettering 572B'
vk6apk at bigpond.com
Thu Jun 25 15:19:36 PDT 2009
Ha ha. Try 7.1V for the AL-811H.
No wonder there's such a good market for 811A and 572B tubes here in Australia.
At 12:53 AM 26/06/2009, donroden at hiwaay.net wrote:
>I think it is more important to keep filament voltage at or below 6.3vac.
>Before modification, mine on a 30L-1 was over 6.9 standby and 6.7 under load.
>Quoting Roy <royanjoy at ncn.net>:
> > Svetlana states its 572B has getter on the plates. Needs only to
> be operated
> > under power.
> > 73, Roy K6XK
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