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joesch1999 23rd December 2012 04:37 PM

Help Astron vs 50m
I bought a variable astron power supply that did not have the two main caps in it, I was wondering if anyone new what kind of caps it takes do not have to be orginal, replacements that will work will be fine, looks like they were hooked in series.

DUG 23rd December 2012 07:00 PM

I wouldn't think anyone would take a guess other than say they were electrolytic.

No real help there but a schematic would be very useful.


Clues to make a good guess would be the following:

Bridge (or diode) rectifier part numbers...this would help with average and peak current limits into the filter caps.

Overall output voltage and current rating of the supply.

Transformer secondary open circuit voltage.

Transformer secondary / Rectifier configuration. (there are a few different ones)

Regulator headroom requirements. (this might be difficult)

Hope that helps a little.

joesch1999 23rd December 2012 09:54 PM

Thanks Doug I thought maybe someone might have one and could let me know what to buy yeah they r electrolytic, I guess i could call the company, I am not so good at reading schematics I will put the link up if someone could help me out I would be greatfull I can see one cap says I and one says V but really don't know what that means.

DUG 23rd December 2012 11:39 PM

C1 looks like 2200uF / 35V

Digi-Key has about 40 in stock that meet these just have to pick which size.

Search for capacitors, in stock, 2200uF, 35V

C5 looks like 100,000uF / 25V

Digi-Key has this one that has screw terminals:

And two others that snap in to cct board.

See, schematics are great for figuring things out.

Good luck.

joesch1999 24th December 2012 02:52 AM

Thanks for the help inside the case looks like there were two big caps hooked together because there is clamps at the bottome for two and there are wires that look like they would connect two together I can't see in the schematics were there are two 100,000 uf caps

Einric 24th December 2012 02:56 AM

I have an Astron VS50M with meters at my shop.
I will check the values in the morning and let ya know.
Last time I had it open I don't remember there being a pair of 50kuf's in there.

joesch1999 24th December 2012 03:11 AM

Ok thank you

DUG 24th December 2012 04:09 AM

Schematic shows just one 100,000uF.

Einric, some pictures would help...worth a thousand words.


Einric 24th December 2012 12:15 PM

NP, I will bring my camera to work with me.

Einric 26th December 2012 01:14 AM

Will Post Pics Later.

The Main cap is....
25V, 30Vsurge
-10 - +75%
85deg C.

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