MJE5731A [resolved]

proud indian · 3160

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Offline proud indian

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on: April 26, 2023, 03:37:36 PM
The MJE5731A on my sex 2.1 has failed. Checked with mouser etc and they say that it is outdated. Is there a sub for this? Thanks. Shreekant
« Last Edit: June 04, 2023, 05:24:28 AM by Paul Birkeland »

system 1. oppo, quickie,SEX 2.1 ( V cap), Decware DFR8 in ZOB cabs
System 2. Tascam cd200, Terra Dac,Zbox,Decware Zen amp(V cap) Lowther PM6A in Acousta horns.
Maple rack, Brass footers,Power conditioner, dedicated treated room, iso pads, plenty of tubes. All cables DIY.

Offline Paul Birkeland

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Reply #1 on: April 26, 2023, 04:20:14 PM
Can you be more specific about what's up with your kit?  Typically a failure like this will have a cause that's external to the transistor itself.  The MJE5731AG and MJE5731G are acceptable subs.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline proud indian

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Reply #2 on: June 04, 2023, 05:12:51 AM
Hi Paul,
Got the transistors and put them in. The led's too were not working. Now everything is fine.
I did notice the the centre area of the c4s pcb had a black discolouration. I added more height to the stand offs, and so far itis working fine.
Thanks formthe help.

Shreekant







system 1. oppo, quickie,SEX 2.1 ( V cap), Decware DFR8 in ZOB cabs
System 2. Tascam cd200, Terra Dac,Zbox,Decware Zen amp(V cap) Lowther PM6A in Acousta horns.
Maple rack, Brass footers,Power conditioner, dedicated treated room, iso pads, plenty of tubes. All cables DIY.

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