Hi all:
Just brought home a "Regulated H.V. Power Supply" that I found on Craigslist for $100. I brought along my DMM and tested the B+ HV supply, which delivered around 404 VDC. I didn't bother to test the other outputs, since they are redundant to my needs.
A quick search of the Eevblog forum yielded this thread, which got me a little nervous:
https://www.eevblog.com/forum/testgear/do-you-have-any-test-equipment-in-your-lab-that-uses-vacuum-tubes/msg2676798/#msg2676798In that thread, user Martin.M pointed out a potential pitfall, stating:
"Set it to 12 Volts or 15 Volts to feed any small transistor experiment,
Then press STANDBY and look what the voltage output will do before shutting down finally.. (a typical 30V Transistor will be RIP )
Heathkit made a bullshit there, it may be better to remove "Standby" and type there "WORST CASE SWITCH""
I'm guessing that he refers here to some kind of voltage spike which will result from switching either the HV B+ 0-400V supply or the C- 0-100V supply from the "On" position to the "Standby" position while the DUT is still attached to the output terminals?
My question is, couldn't a person simply disconnect their DUT before switching from "On" to "Standby" to avert this problem, or is there another aspect to this potential pitfall which I'll need to look into before I start testing and using the new power supply?
BTW: the photo posted in that original thread depicts a device which appears identical to the one I have, except mine is labeled not "Heath/Zenith" but "Heath/Schlumberger".
Thanks for reading. Any comments, jokes, suggestions or criticisms will be greatly appreciated.