Hi All.
I now have the HP 117A but I find it has been modified for a 12 volt
antenna. Looking inside I find a 3 terminal regulator that could be a
factory mod except it is on perf board. Judging by the wires that come out
of the harness I would say there used to be something in that place. The
voltage coming to the regulator is about 33 volts but the seller informs me
that there is an antenna voltage adjustment. I suppose the voltage was set
to minimum to reduce dissipation in the regulator. I am wondering what went
where that regulator is now. Maybe a thermistor to limit the inrush current
to the antenna? I am hesitant to just take out the regulator and solder the
ends of the wires together, excluding the ground of course. If anyone has a
manual you have already scanned I would appreciate receiving it.
Regards.
Max. K 4 O D S.
Email: [email protected]
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----- Original Message -----
From: "Mark Sims" <[email protected]>
To: <[email protected]>
Sent: Saturday, May 02, 2009 7:24 PM
Subject: [time-nuts] Chart recorder consumables (was HP 117 paper)
Don't know what it fits, but it's cheap.... Ebay item 120412680477. It is
apparently 6" wide, trac drive.
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