[Heathkit] SB-634 Clock counts 12 hrs, NOT 24

[Ian Wilson]

Looking at the schematic (all I have) there is a diode + jumper that
connects from pin 5 of IC201 - which appears to be the clock device.

Perhaps that is a 12/24 hour selection jumper?

73, ian K3IMW

On Thu, Feb 18, 2016 at 12:29 PM, Alexander N. Gerli <ac1wye at gmail.com>
wrote:

> Hi, gang!  My new-to-me SB-634 doesn't act right. The digits all seem to
> count correctly, BUT the main Hours digit only counts to 12, not 24.
>
> I cannot find anything in the Manual about this. Like there's no choice of
> wiring the Hours digit for 12- or 24-hour operation. Nothing in the ICOD
> section either.
>
> Anyone know how to fix this?
>
> 73,   Sandy AC1Y
>
>
> --
> Sent from Sandy'sGmail Mobile
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