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Old 27th January 2003, 03:03 AM   #1
jleaman is offline jleaman  Belgium
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Default Fred Boards

Ok im stumped. I have 4 fred boards. for 2 x aleph 2's. Now normaly you use 2 rectifiers witha dual secondary tranny. well i have a dual secondary tranny 1kva but i dont know how to wire up 2 boards per trany is it possible with this transformer and fred boards or do i have to use 2 rectifiers.

See immage below.
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Old 27th January 2003, 03:29 AM   #2
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Old 27th January 2003, 03:31 AM   #3
jleaman is offline jleaman  Belgium
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what is it you want it to show.?
i was just useing it as a example.
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Old 27th January 2003, 03:42 AM   #4
jleaman is offline jleaman  Belgium
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here ya go.
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Old 27th January 2003, 04:13 AM   #5
jam is offline jam  United States
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Wire a pair of secondaries to one board and the other pair to a second board. Attach the positive of one board to the negative of the other board and attach this to ground, leaving you with positive and negative rails.

Jam

P.S. You are using four diodes per board to make a bridge.
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Old 27th January 2003, 04:18 AM   #6
fcel is offline fcel  United States
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You mentioned you have dual secondary for your transformer - you're building a stereo Aleph 2 on one chassis. You will need 1 "Fred" board with 4 diodes per board for each set of secondary.
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Old 27th January 2003, 04:45 AM   #7
jleaman is offline jleaman  Belgium
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no im building mono block's aleph2's usine a 1kva transformer from Peter daniel. it has dual secondary's.
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Old 27th January 2003, 04:59 AM   #8
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Those boards are not different than a regular bridge rectifer. You use 2 boards per toroid, using only one board for primary setup. You connect ea set of secondaries to ea board. One board creates positive rail, the other negative, with the other two sides conected together to ground, as jam explained already.
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