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Re: Low output signal on LDC

Joe D — Sat, 04 Jul 2009 16:44:51 GMT

OK - - got it working - - Thank you guys! Sounds really great now. The layout I used is wrong compared to the schematic. Should have checked it out

Re: Low output signal on LDC

Scott Helmke — Sat, 04 Jul 2009 12:37:04 GMT

In that case just start removing stuff after the 6.8K resistor until the voltage pops back up. Maybe it's a shorted capacitor. -Scott ... -- ... And you'll

Re: Low output signal on LDC

Joe D — Sat, 04 Jul 2009 06:46:19 GMT

I checked all the diodes & electrolytes - everything fine. I have 30vdc right before the 6.8k resistor and then it drops off to 0.74vdc right after the

Re: Low output signal on LDC

Eric Benjamin — Sat, 04 Jul 2009 05:49:41 GMT

... My best guess is that you have installed the 1n4740 backwards.

Re: Olympus DS-30 electret mic pad...

Rob Danielson — Sat, 04 Jul 2009 03:03:02 GMT

... Hi Joe-- When I scanned through the DS-30's owner manual a while back, I don't think I came across any mention of manual gain for this recorder. I think it

Re: Low output signal on LDC

Joe D — Sat, 04 Jul 2009 02:55:46 GMT

OK ....will check it,Thanks ... From: Scott Helmke Subject: Re: [micbuilders] Low output signal on LDC To: micbuilders@yahoogroups.com

Re: Low output signal on LDC

Scott Helmke — Sat, 04 Jul 2009 02:46:15 GMT

A reasonable assumption. Make sure you don't have a zener or electrolytic in backwards, and look for other possible shorts. You should be seeing a healthy

Re: Low output signal on LDC

Joe D — Sat, 04 Jul 2009 02:08:38 GMT

Thanks for the reply Scott---I'm new at this but I assume I have a short to ground someplace? ... From: Scott Helmke Subject: Re:

Re: Low output signal on LDC

Scott Helmke — Sat, 04 Jul 2009 01:48:45 GMT

That works. You should be seeing more like 10 vdc in the "power supply" section - at the + of the 10uF electrolytic, etc. Basically you're not getting any

Re: Low output signal on LDC

Joe D — Sat, 04 Jul 2009 01:45:24 GMT

[img]http://s248.photobucket.com/albums/gg176/jmdonahue/?action=view¤t=Readings7-3.gif[/img] maybe a link will work? ... From: Joe D

Re: Low output signal on LDC

Joe D — Fri, 03 Jul 2009 22:00:05 GMT

So I found out you can't attach files -------- ... From: nicmitch2003@... Subject: [micbuilders] Low output signal on LDC To:

Low output signal on LDC

nicmitch2003@... — Fri, 03 Jul 2009 21:52:28 GMT

Hi - I recently built a mic using a TSB-2555 with a 2n4416 j-fet.This is my 1st DIY mic & the output is extremely low. I've gone thru it a couple & can't get

Re: Olympus DS-30 electret mic pad...

Joe Diliberto — Fri, 03 Jul 2009 20:39:53 GMT

There is no line unfortunately. EMAILING FOR THE GREATER GOOD Join me To: micbuilders@yahoogroups.com From: m.chang@... Date: Fri, 3 Jul 2009 10:03:38

Re: Olympus DS-30 electret mic pad...

Michael Chang — Fri, 03 Jul 2009 20:31:46 GMT

Ignore my previous reply, Joe. Line input obviously won't supply PIP.. :-)

Re: Olympus DS-30 electret mic pad...

Michael Chang — Fri, 03 Jul 2009 20:29:21 GMT

Joe, it'd be tricky to recommend values for a resistive pad without knowing the associated circuitry in the mic and preamp especially when you're relying on