[R-390] Regulated filament voltage

[David Wise]

[Resent with content.  Thanks for the recall note, Bob, I thought I could catch it before it got free of the company server.  Of course not, it's fast when I try to outrun it.]

>-----Original Message-----
>From: r-390-bounces at mailman.qth.net 
>[mailto:r-390-bounces at mailman.qth.net] On Behalf Of Drew P.
>Sent: Sunday, February 20, 2011 10:10 AM
>To: r-390 at mailman.qth.net
>Subject: Re: [R-390] Regulated filament voltage
>
>
>Now, I can envision the wheels of Dave's mind turning as he 
>implements a way to accomplish 2 terminal series voltage 
>regulation in place of current regulation, all with just a 
>software revision to his present design.
>
>Drew

Nope.  Kurt Schmid outlined the possibilities; they all comprise some kind of third wire to ground.

My circuit is too complicated, about 20 parts to the fully-loaded prototype, 15 if you leave out the pretty LED.  I've written code for a 9-part version.  Should I move this "3DW7 Mk II" up the docket?

Dave Wise