[R-390] Role of the 3TF7 in PTO frequency changes

[David Wise]

I offered a similar plug-in replacement (proudly
named the "3DW7" after my initials) a few
years ago and was mostly ignored.  My design
does not need grounding.  I regulate RMS current
(necessary to avoid the ground pin) by switching
individual cycles of AC.  I figure that Kurt
rectifies, and then regulates the output with
a high-frequency switcher.  This has been done
before, but not in a 3TF7-size package.  Is your
output smooth DC, Kurt, or pulsating DC whose
RMS value is 12.6?

Dave Wise

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] On Behalf Of sigmapert
Sent: Wednesday, July 22, 2009 5:55 AM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Role of the 3TF7 in PTO frequency changes

Hi,

the following link describes the the plug-in in more detail:

http://schmid-mainz.de/Flyer.pdf.

am Mittwoch, 22. Juli 2009 um 14:15 schrieben Sie:

> Kurt, so what is your plug in all about??  Can you detail what it is??
> Schematic??  Do you sell it??

> -73-  Peter K2LRC
> www.k2lrc.com
> In God we Trust !



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