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Old 10th August 2013, 07:15 PM   #1231
bcmbob is offline bcmbob  United States
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Thanks William, but after Googleing a bit, and even with your diagram - it appears the only way to get the needed +/0/- is using two four leg items. As the neutral and ground wires (U.S three prong AC plug) in my home are tied back to the same bus bar in the service box, it seems one quad should be enough. But unless someone has actually successfully used such a configuration in an amp, I best stick to the Pass PS diagram.

TNX

Diode Bridge Theory.
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Last edited by bcmbob; 10th August 2013 at 07:21 PM.
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Old 10th August 2013, 08:32 PM   #1232
6L6 is offline 6L6  United States
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Bob - if you arrange your secondaries as a centertap, you can use one bridge for a +/0/- supply --

Click the image to open in full size.

Most of the factory Pass Aleph amps were wired this way.
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Old 10th August 2013, 09:05 PM   #1233
bcmbob is offline bcmbob  United States
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You'r my hero !! I'll do some fiddlin' and post what I find.
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Old 11th August 2013, 01:04 AM   #1234
bcmbob is offline bcmbob  United States
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Completed today's assignment Professor 6.

A fun exercise just different enough from what Iv'e done in the past to make it a good lesson. Getting + 25.5 and -25.5 to center.

Thanks !!!
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Old 11th August 2013, 01:43 AM   #1235
6L6 is offline 6L6  United States
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Awesome! I'm glad it's working as expected.
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Old 11th August 2013, 05:37 AM   #1236
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hi all
can we use semisouth r100 here to replace irfp240 in the se output stage and using 1 x pair per side

Sheafer

Last edited by slr 5000; 11th August 2013 at 06:02 AM.
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Old 11th August 2013, 08:16 AM   #1237
Itsmee is offline Itsmee  England
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Quote:
Originally Posted by slr 5000 View Post
hi all
can we use semisouth r100 here to replace irfp240 in the se output stage and using 1 x pair per side

Sheafer
Have a look at the Aleph Jango post #13.

Note, the pot on the LTP is 500R not 500K.

The Aleph Jango
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Old 11th August 2013, 09:14 AM   #1238
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OK thanks
so by the looks of it they can only be used in the pp output stage to replace the irfp9240 with a change in the bias adjustment

not really worth the trouble correct? as we still need to use the irfp240

cheers Sheafer
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Old 11th August 2013, 09:42 AM   #1239
Itsmee is offline Itsmee  England
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The circuit is a modified Aleph J which is a single ended output, the IRFP240 form the classic Aleph modulated constant current source, fitting R100 here could be done but would probably be a waste.

Keep the other R100's as spares, or wait until the J2 is out of production and the schematic becomes available.
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Old 11th August 2013, 10:48 AM   #1240
tinitus is offline tinitus  Europe
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Juma's reg supply for his 2sk2013/2sj313 F5 version
( hope he won't mind this )
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