Same thing happened to our SB-220,-- after 35 years regular use, the front
panel power switch failed in the 'ON' state. Couldn't find exact
replacement switch. Inserted a wall switch box in the power cord, has
worked fine for last 5 years. The outboard power switch also controls an
auxiliary fan module which previously was being turned on separately
anyhow....
73 Don N7EF
On Thu, Oct 16, 2014 at 8:50 PM, Charles Henry <k4vud@hotmail.com> wrote:
> My 76pac has had front panel switch failures. Pushing the off button did
> not turn it off. Other time, the Gang Of Four, failed.............. all
> these are a bear to replace because Alpha current parts stock do not quite
> fit and require some bending and so on. 73, Charly
> PS. Thanks to my good friend for doing the change outs.PSS, someday too
> soon, the replacement switches will not be available and their design does
> not allow a good old simple toggle switch, bat or ball handle, to be put in
> place easily. Many of all kinds of commercial amps outlive their unique
> replacement parts. Look at the square sw on the Titan, etc. Hey, mfgs.
> come back to toggle switches, good enuf for Mercury capsule, and very good
> for hams!!!!
> Does anyone remember ordering rotary switch wafers in wide choice of
> positions ... just the wafers!!!!
>
>
>
> > Date: Thu, 16 Oct 2014 23:21:11 -0400
> > From: cchedrick@gmail.com
> > To: amps@contesting.com
> > Subject: [Amps] Alpha 76pa shutdown
> >
> > I put the amp in Standby while I set the antenna tuner up for 75 meters
> on
> > the balanced Line (real ladder line). Then I went to it and it was off.
> > Would not go on so I pull it out and but my built Amp with two 3-500ZG
> > in. It is fine.....
> > So, I did look at the fuses and all 3 are fine. I checked all the
> > resisters, diodes, but not the electric caps. I'll do check them on this
> > weekend. But they are only 14 months since I put them in.. Off to
> bed...
> > Any ideas for me, let me know.
> > Thanks,
> > Cam
> > WA4JKW
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> > Amps@contesting.com
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>
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