[R-390] Second R-725 on ebay

[David Wise]

Remember, Roger, Servo added a new transformer just to
power the PTO and BFO filaments.  Once the filaments are
disconnected from the normal 25.2 infrastructure, they
can do whatever they want.  Including elevating to a DC voltage.

Absolutely not worth the effort to retrofit, IMO.  Lots of
work for probably no noticeable improvement, and now
it's not stock.

Dave

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Flowertime01 at wmconnect.com
Sent: Monday, May 11, 2009 2:25 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Second R-725 on ebay

Fellows,

Looking at the R390/A schematic is see it would be a night mare to "change" 
the VFO and BFO filaments to get the hum out of the oscillators.

Roger AI4NI
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