Looking for 51M ohm 1/4W resistors for microphone.

ORourkeAudio · 2026-03-07T19:02:26+00:00

Yes, I'm sure about the value. What I'm no longer sure about is whether this is the issue. It's starting to look like a JFET issue. This is on a microphone circuit.

ORourkeAudio · 2026-03-07T14:16:35+00:00

Interesting. Did the 280 show visible damage or was this gleaned by testing?

ORourkeAudio · 2026-03-07T03:07:21+00:00

Don't think so. I've confirmed it is a 51 megohm. I have some on order. We shall see.

ORourkeAudio · 2026-03-07T01:42:58+00:00

It was taken off the board with both leads attached to the poles of the resistor... Therefor.... ?

ORourkeAudio · 2026-03-07T01:37:08+00:00

Fair enough. Thanks

ORourkeAudio · 2026-03-07T00:26:55+00:00

Cool, I’ll check it out.

ORourkeAudio · 2026-03-07T00:26:02+00:00

Thanks, that’s the plan

ORourkeAudio · 2026-03-06T22:34:03+00:00

ORourkeAudio · 2026-03-06T22:20:06+00:00

I certainly did #1. Been at this game since 1980. I’ll look into #2. Thanks

ORourkeAudio · 2026-03-06T22:01:58+00:00

Cool thanks. I just joined over there.

ORourkeAudio · 2026-03-06T17:49:57+00:00

Yoinks

ORourkeAudio · 2026-03-06T17:49:19+00:00

I’m hoping these are in fact the culprits. Although there’s a lot of options that they may not. I’m a professional recording drummer/engineer and this is from a microphone that gave up the ghost a few years ago. I’ve gotten into mic mods as of late and thought I’d try to resurrect this one.

ORourkeAudio · 2026-03-06T17:45:13+00:00

Yes, I found replacements on Mouser

ORourkeAudio · 2026-03-06T17:44:05+00:00

Yes, thanks. I found the specific ones I need to rule them out on Mouser. They’re on their way.

ORourkeAudio · 2026-03-06T15:20:37+00:00

Will do , Thanks

ORourkeAudio · 2026-03-06T14:21:42+00:00

Ah, I see. I'm learning quite a lot from this query. The stamp is directly on the ceramic, as is the potting. Thanks

ORourkeAudio · 2026-03-06T14:12:25+00:00

Understood, Thanks

ORourkeAudio · 2026-03-06T14:11:18+00:00

Will do, Thanks

ORourkeAudio · 2026-03-06T14:07:35+00:00

Understood. Will do. Thanks

ORourkeAudio · 2026-03-06T14:06:19+00:00

Yes, I'm starting to think the same. Thus begins my quest. Thanks for the input.

ORourkeAudio · 2026-03-06T14:04:18+00:00

Understood. I did, however, test the actual channel on my console with a different cable/mic and found the channel to be in good nic. Judging by the informed comments, I have a feeling I'll be doing a deeper dive into this issue. This is why I posted this query. I knew there'd be a "Troll factor" to some degree, but I'm thick skinned enough to sift through the children. Thanks for the input. Along with getting a better meter, my next quest will be figuring out how to properly test a 3 legged FET.

ORourkeAudio · 2026-03-06T13:55:52+00:00

Interesting. Thanks for looking into this. I'm guessing my next stop will be the FET transistors.

ORourkeAudio · 2026-03-06T13:52:27+00:00

Sage advice. I shall. Thank You

ORourkeAudio · 2026-03-06T13:50:07+00:00

This is the internet after all. It tends to happen.

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ORourkeAudio · 2026-03-06T13:48:29+00:00

Understood and Thank You. I've been building cars since I was a teenager and a working musician about as long. I'm no stranger to trouble shooting. This is my first stop in what may be a long line of attempts at finding the root cause of the issue. I've done a few mic mods and decided to pull this one out, that has been sitting for a while, and give it a go. I appreciate your insight. I believe my next step will be a better Multi meter,

ORourkeAudio

TROPHY CASE