Re: 8015A Pulse Generator ("Parts or Repair")
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I had an 8015A about ten years ago.? Beautiful machine, should¡¯ve kept it.? Separately variable rise and fall time from nanoseconds to fractional seconds.? I don¡¯t remember it making an unusual amount of heat and certainly no smoke.
The architecture is interesting.? Separate amps for pulse and offset, both wired as current sources and all dumping into a master 50-ohm termination resistor.
I¡¯d look for a fault in a driver causing shoot-through, or maybe a shorted output transistor in the pulse section.
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HTH,
Dave Wise
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From: [email protected] < [email protected]>
On Behalf Of Mark Bielman via groups.io
Sent: Sunday, January 30, 2022 4:52 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 8015A Pulse Generator ("Parts or Repair")
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I'd like to button up this project if possible. It's been on my bench for too long!
I (carefully) brought it up w/o issue. Ran through some testing and it appears to work well. However, the unit creates a LOT of heat, seemingly from the (heavily heat sinked) output transistors. Since the ebay seller said it started smoking, I have not left
it on for more than an hour or so.
So I am wondering if this heat is "normal" or should I keep looking for a problem?
Thanks group!
Mark
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