[R-390] Regulated filament voltage

[Bernie Doran]

If regulated fil voltage is so important, why not just regulate the AC line 
voltage and perhaps drop it down a bit? That pretty much covers everthing.
----- Original Message ----- 
From: "David C. Hallam" <dhallam at knology.net>
To: "Henry Mei'l's" <meils at get2net.dk>
Cc: <r-390 at mailman.qth.net>
Sent: Sunday, February 20, 2011 6:31 AM
Subject: Re: [R-390] Regulated filament voltage


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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