[ARC5] "Re-Banding" SCR-274N

[Dennis Monticelli]

Michael,

Why would one end up with half the power?   There is a center-tapped
secondary on the osc coil.  One half drives the paralleled grids of the
1625's, the other half drives the neutralizing cap, and the center tap
develops the class C bias.  The mod would only require moving one of the
grid wires to the neutralizing cap side of the secondary. The total drive
power and the voltage drive level to each grid would remain the same.   The
only difference is that instead of the 1625's summing their cathode pulses
in the same phase of the osc cycle, each delivers its cathode pulse (of the
same magnitude as before) twice per cycle.  Am I missing something?

Dennis AE6C


On Tue, Mar 25, 2014 at 8:16 PM, Michael <k3mxo.hi at gmail.com> wrote:

> -----Original Message-----
> From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net]
> On
> Behalf Of Dennis Monticelli
> > The best way to double is to move the secondary connections of the osc
> > transformer to drive the 1625's in push-push.  I've always wanted to try
> > that.
>
> This works however you also wind up with half the output power.  This is
> one
> of the disadvantages of a push-push doubler.
>
> Best Regards,
>
> Michael, K3MXO, CBLA #6, BL01hx15np24 ... or there abouts
> Sometimes I pretend to be normal but it gets boring so I go back to being
> me.
> http://www.nationalmssociety.org/chapters/NTH/index.aspx
> http://wh7hg.blogspot.com/
> http://kludges-other-blog.blogspot.com
> Hiki Nô!
>
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