[R-390] Regulated filament voltage

[David C. Hallam]

Please read Dallas Lankford's notes on R-390 filament voltage regulation.

http://www.kongsfjord.no/dl/dl.htm

David
KW4DH

On 2/20/2011 2:20 AM, Henry Mei'l's wrote:
> Good morning (8:19 UTC), R-390A connoisseurs  and other good folk ;0)
>
> If you really want stabilized, constant filament voltage then why not
> just a add a dc regulator circuit, set to 12.6V or thereabouts?
>
> This wouldn't take up much space and is entirely retro-able.
>
>
> I know others have done this for other receivers using ballast
> tube filament stabilization.
>
> Henry,
> OZ3O  N2NR
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