Q821~Q824 on MAC4100

If I had to guess, the originals as well as the subs have both been discontinued and so we would be looking at subs, for subs for the originals.

However Christmas is for hanging out and spoiling grandkids, not hanging out with schematics and parts lists.

If the replacements have not been posted in this forum previously it will have to wait until Weds.
 
132-183 is FT317A
132-184 is FT417A

They are obsolete and replaced by MJE15028 (for 317) and MJE15029 (for 417) selected type (not ordinary components )

what is the problem on your MAC4100 ?
 
132-183 is FT317A
132-184 is FT417A
They are obsolete and replaced by MJE15028 (for 317) and MJE15029 (for 417) selected type (not ordinary components )

WOW
Merci beaucoup monsieur... I was just thinking about the part to get some datasheet and see If I have a something here on stock, but this is awesome & I have some MJE150XX on stock.

what is the problem on your MAC4100 ?
A muppet over tight and soldered the whole screw on Q822 and I can see a small fracture, the transistor seem to function well, but I don't trust them.

Many many thanks

CIMG0737.JPG
 
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Patrice,

How come my memory says they were replaced by Toshiba devices that were then replaced by Sanyo devices......I want to say from memory 132-237 and 238 but won't be able to confirm until Weds.
 
132-237 is 2N5415 TO5 Package
132-238 is 2SC3281 TO3-PL Package

I don't believe that these transistors will fit and work there ..

I think that the best is to use MJ15028 and MJ15029 in TO220 Package (same as original)
Replace the both micas !
 
I never claimed my memory is anything but partial.......I think I was thinking of 132-248/249 which are the drivers used in later production amps and are Sanyo devices.....with the wrong pin out.

I know I have some in stock to experiment with when the other pin out is needed.
 
MJE devices already installed and unit is working fine... Thank you very much Patrice, this was pure gold and it will help others in the future as well

:beerchug:
 
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