Blown mje350 and led [REPAIR VID AT END] [resolved]

Rob C · 10520

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Offline Paul Birkeland

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Reply #45 on: November 30, 2023, 06:27:33 AM
You want the 5731A on the A side where it's exposed to more voltage and cooks off a little more heat (in the Paramount).  In the Foreplay, the center board just gets a little warmer than the outer boards and the 5731A will more gracefully handle the load in that position.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Rob C

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Reply #46 on: November 30, 2023, 06:45:55 AM
how about the B side? I've installed the MJE5731a. On the B side. Can I put mje5731AG on both A and B?
« Last Edit: November 30, 2023, 06:49:01 AM by Rob Capizzi »



Offline Paul Birkeland

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Reply #47 on: November 30, 2023, 06:53:01 AM
You can do that in the Paramount.  I personally don't find it worth the risk of damaging a PC board that we don't produce anymore to do this, but it's certainly an option.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Rob C

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Reply #48 on: November 30, 2023, 07:00:17 AM
So then I'll leave alone side A in paramount, but upgrade side B in foreplay center board?



Offline Paul Birkeland

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Reply #49 on: November 30, 2023, 07:23:30 AM
Yes, you are correct.  For whatever reason, I remembered the higher current/voltage side of the Paramount C4S being the A side (a convention which we did adopt at some point), but it appears that the B side is where you want the 5731As.  Such things happen on a product that hasn't been around in a while!

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Rob C

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Reply #50 on: November 30, 2023, 07:25:05 AM
Thank you