Thanks Dave,
I also found a write up about it in the October 1968 HP Journal. I suspect
that the oven on the A5 board is for one (or both) arms of the thermocouple
used for the RMS conversion. I've had one of them on for about 1 hour, and
the Zero set has moved around a *lot* as it warmed up, but the oven doesn't
appear appreciably warm to touch ??? but the PSU - now that DOES run pretty
darn warm!
Accuracy +/- 0.5dB in AC mode (over most of the range 0.5Hz - 100kHz), +/-
0.25dB in DC mode
You're right they will make very nice project boxes :-)
Dave
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-----Original Message-----
From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of ArtekMedia
Sent: 23 September 2009 17:21
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] 7562A Log Voltmeter/Converter
All discreet transistors and a few IC's ...Nice little power supply ...must
be highly accurate as it has a "heater" (A5 Board) recommends 20-30 minute
warm up. Converts AC/DC -IN to LOG out 80dB dynamic range, auxiliary scope
monitor . Hook two of them in series get LOG-LOG out
I'll send you a private email with scan of the description page.
Nice case for a project box
Dave & Lynn Henderson
ArtekMedia
Out-of-Print Technical Manuals
www.ArtekMedia.com
manuals@...
651-269-4265
David C. Partridge wrote:
Pending anyone turning up a manual for these, what are these good for
and for that matter are they worth anything?
On another tack - are there any interesting things inside them (there
looks to be an ovenised "something" in there)?
Cheers
Dave Partridge
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