More power for K2

I came into a cheap old Yaesu FP 107E power supply which works fine, except for somewhat low voltage output.  I notice the transformer has several taps, but I'm afraid to mess with it, since I have no manual.  
 
I would be beholden to anyone who has a manual for this unit, and would be so kind as to send info on how to change the taps for higher voltage.  Also, a copy of the schematic would be nice.  
 
Many thanks, George, N4YM
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[Don Wilhelm-3]

George,

I don't have a manual or a schematic, but I would think that is a regulated
supply - if so, changing the transformer taps will only change the bulk
voltage but should not change the output.

There may (or may not) be a pot in the regulator circuit that would change
the output voltage.

73,
Don W3FPR

> -----Original Message-----
>
> I came into a cheap old Yaesu FP 107E power supply which works
> fine, except for somewhat low voltage output.  I notice the
> transformer has several taps, but I'm afraid to mess with it,
> since I have no manual.
>
> I would be beholden to anyone who has a manual for this unit, and
> would be so kind as to send info on how to change the taps for
> higher voltage.  Also, a copy of the schematic would be nice.
>
> Many thanks, George, N4YM
>

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[Trevor Day]

Hi George, your wish is my command :-)
The manual for the FP107 is part of the full manual for the FT107
transceiver.  I have extracted the relevant bits as a pdf and forwarded
them to you separately.

Trev G3ZYY

In message <[hidden email]>,
"[hidden email]" <[hidden email]> writes

>I came into a cheap old Yaesu FP 107E power supply which works fine,
>except for somewhat low voltage output.  I notice the transformer has
>several taps, but I'm afraid to mess with it, since I have no manual.
>
>I would be beholden to anyone who has a manual for this unit, and would
>be so kind as to send info on how to change the taps for higher
>voltage. Also, a copy of the schematic would be nice.
>
>Many thanks, George, N4YM
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com

--
Trevor Day
UKSMG #217
www.uksmg.org

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