Products > Test Equipment
Marconi 2022E RF signal generator repair and refurb
bd139:
Have attached gerbers, BOM, schematics and sample picture to this post
tggzzz:
--- Quote from: bd139 on August 10, 2022, 08:52:39 pm ---Anywhere here it is pretending to be an RF signal generator. I de-stickered and cleaned it when I was on a conference call last week. Multi tasking FTW.
--- End quote ---
Old joke; "Why do women knit while they talk?" "To give their minds have something to do".
I think the comparison is obvious :)
bd139:
Exactly that :-DD
artag:
I started reading this thread again and had an idea. Of course, it's all water under the bridge since you've got a good fix but I can't help wondering ..
As I understand it, the problem you had with the supply was that the 5V wasn't high enough current and you didn't have anywhere to heatsink the regulator you'd need from the 12V rail. But .. many oven controllers use the dissipation of the series pass transistor controlling the heater to add to the heat sourcew (since they don't dissipate anything when the heater is inactive) - indeed, I've seen a design where just a transistor is used as a controllable heater.
So, what if you heatsink the regulator to the OCXO can ? It will increase the thermal gain a bit, admittedly, but should keep itself at a low temperature.
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