No, you're just replacing broken parts with new ones.
Blown mje350 and led [REPAIR VID AT END] [resolved]
- Thread starter Mr. Self-destruct
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Mr. Self-destruct
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Mr. Self-destruct
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Should I replace all four mje350 on both boards in both amps?
I would take the heatsinks off the high voltage rectifier diodes, as they dissipate nearly no heat. Likewise on the remaining MJE350 in the Paramount.
Mr. Self-destruct
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Paul Birkeland said:
Ok I will. I am also going to replace the old A side mje with mje5731AG on both amps. Also both on the center board in the foreplay. I will only heatsink the MJE5731ag on the B side only? . I assuming the MJE5731ag will work on both the A and B side. Any other prevention upgrades I should do?
Also, why in the manual ,A side calls for MJE5731a and B side mje350? Thanks.
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.
Mr. Self-destruct
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how about the B side? I've installed the MJE5731a. On the B side. Can I put mje5731AG on both A and B?
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.
Mr. Self-destruct
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So then I'll leave alone side A in paramount, but upgrade side B in foreplay center board?
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!
Mr. Self-destruct
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Thank you