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Old August 2nd 07, 07:47 AM posted to alt.binaries.pictures.radio
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First recorded activity by RadioBanter: Jul 2007
Posts: 11
Default Design help: Modulator schematic


"Brenda Ann" wrote in message
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"Brenda Ann" wrote in message
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"Jim Mueller" wrote in message
...
As others in the other group have mentioned, you're pushing your luck
with 600V diodes. They have over 700V on them (or they would have if
things were working right). Replace them with 1000V diodes. This also
means you need to replace those capacitors with 1000V capacitors,
preferably AC rated.

As someone else said, you have a major problem with the power supply.
The output voltage should be much higher.

--

I think I have kenned out what that problem IS. It's not a 250-0-250..
it's a 125-0-125 on the secondary.. which would output pretty much what
I'm getting.


change it to a bridge rectifier across the whole 250V winding, and
everything should work fine!


This is my transformer. From Mouser

http://www.hammondmfg.com/pdf/5c0030.pdf #261G6
261G6 45250V C.T.@ 130 ma 6.3V @ 2A 1 4.00 2.50 2.63 3.56 2.0




 
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