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Heat-sinks are not really necessary.  If you do decide to add them make certain that they do NOT touch anything else - other heat-sinks, chassis, components, etc....  There is more than enough room to breathe.  We at times used them on the M600 series modules, and that is about all I can recall.  Transistor slip-on heat sinks were not a regular stock item when I did things there.  Yes we made some for the TIP29 and TIP30 units as they regulated voltage, but not for audio transistors.  And of course the transistors for power supplies, and amplifyers were fastened to our custom designed and made heat-sinks.

yes the eqs are 22uf / 25 v

heat sink... if there's room go for it

they get hot, but there's room to breath

So, I don't have a schematic for my eq's.  Are the 22uf caps in the eq's in the power rails or are they in the audio path? 

Also, is there any reason to put heat sinks on or to not put any on the transistor on the 809 and 409 cards.  I've got a huge bag of them so it would cost me nothing at this point.

I have already beefed up my power supply with bigger caps and i will say I think it made a sonic difference.  they must have been worn out.

For Power-Supply filter-caps, I agree with Tony... Go with the cheaper Mouser ones.

Power Supplies do not rely on super high quality capacitors... and if they do, then I suggest rebuilding the supply!

A very crude and simple way to think of it... the capacitors in a supply help keep power at a high level... better caps might give you a larger power-level, yes...

but the voltage regulators cut off all that extra power, and give you perfectly clean and consistent power!


No matter how much reserve power you have, or how little... you'll get the same out-come.
As long as the caps are working at the minimum that the regulators need, you'll be fine!

And for WB stuff, I've concluded that the power-supply system is over-engineered!  Well, compared to modern equipment!

The cheaper of the two

Hey guys, I'm wondering what the difference is between these two caps?

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=4068PHCT-ND

and

http://www.mouser.com/ProductDetail/Vishay/MAL202138229E3/?qs=VJtzl2NKxc02eaKF4yzv7g%3d%3d

Which one are the caps to get?

Thanks

Hello everyone!
I got recently a t1202 console in good working condition, but I would like to get it checked out cause there is 1 or 2 channels that may need some repairs.
Does anybody knows about a reliable technician that could work this out  the Montreal area?
Thanks for you help!
s.

wow. this is probably the best sounding Beck ever made...

I'm not experienced with the 462...  but from looking at the schematic... i can tell you that it has a lot of chips!

The bulk of the signal passes through the main board... but the daughter board also processes the signal!

If you want to completely upgrade the module, you will have to change every chip...

but I think you should experiment!  Try just the main board in one, try the daughter board in another, and try everything in the next!


When I changed the IC's in some LA-4's, I changed the ones that the sound past through... and left the compression-processing ones alone.
The output is clear, without the normal dark-sound that you'd expect....
but the way that it compresses still has a dark vibe to it...


when you get into changing chips, it really is simply a matter of personal preference!
Don't follow someone else's suggestions just because they say it's amazing!

Thanks Tristan. I thought I understood you correctly but I just wanted to make sure.  Now the question is do I change the IC's on just the main board or do I change the IC's on the 4-126 daughter board as well?