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firechief 9th March 2009 06:55 PM

DDD mfg co High Voltage power supply?
2 Attachment(s)
I'm having trouble locating a schematic for this Power Supply

D D D Mfg. Co.
Model 3-150B

uses 6BG6 GA power tubes and is in the 19" rack mount configuration.
any help would be appreciated, I seem to be striking out on with the usual web searches. Also the local ham radio flea market was lot's of fun. I risk being down 25 dollars if I cant fix this.

tomtt 9th March 2009 11:26 PM

Re: DDD mfg co High Voltage power supply?
2 Attachment(s)

Originally posted by firechief

I risk being down 25 dollars if I cant fix this.

Not Really

case work like this would be, 'a bit more ' than $25 new.

make a nice amp chassis.


astouffer 10th March 2009 01:51 AM

Chances are good that if you replace all the electrolytic and/or wax caps this power supply should work fine. Hopefully it was not modified or "repaired" by a previous owner. Give it the same treatment as an old amp or radio being fired up for the first time in years.

firechief 10th March 2009 02:07 AM

Thanks astouffer
The good news is that the unit came with a set of replacement filter caps, witch I think are oil filled paper. I will be digging into it, but it would be nice to have the schematic. Perhaps I will just draw the schematic as I work on it. There are also some electrolytics I spotted. You know the multi section can type. So with something that old, it might take a multi prong attack. I will know more soon. I think that this was not made in any volume, so that could explain the lack of information. This is intended to replace a Fluke 406 witch is on loan from a goooooood friend, and he deserves to get it back.

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