41

AB528 Microphone preamplifier / AB528 DI not working

« Last post by Ritualknive on February 06, 2026, 02:17:46 AM »

Just put together one of these. Mic and line work well along with the phantom power. DI all I hear is hiss and the front LED doesn’t work either. Any ideas? Thanks! 

42

DI503J Triple DI and Re-Amp / Re: DI503J triple DI output buffer

« Last post by TheWoodman on February 04, 2026, 06:55:54 PM »

Thanks very much for your answer. Depending on levels/impedance this possibly thins out the instrument signal a little when another load (amp for example) is connected to the unbuffered TS output. Which can easilly be handled by placing my own buffer before the input. So thanks again, this is just good to know.

43

DI503J Triple DI and Re-Amp / Re: DI503J triple DI output buffer

« Last post by JPK on February 04, 2026, 06:49:49 PM »

It is just in parallel with the input, without buffering.

44

DI503J Triple DI and Re-Amp / DI503J triple DI output buffer

« Last post by TheWoodman on February 04, 2026, 06:30:55 PM »

Is the output TS jack of the Triple DI buffered (when not in reamp mode, so just paralleling the input signal).

45

MC624 Monitor Controller / Re: 12 year old manual recommendations outdated

« Last post by JPK on February 04, 2026, 08:57:06 AM »

Hi,
We use this one.
We couldn't find a TV model that worked 100% so we programmed the MC624 manually for this remote.

46

MU524 Vari-Mu Tube Compressor / Re: Initial AC voltage jump

« Last post by JPK on February 04, 2026, 08:46:32 AM »

Check that the input potentiometer is working by measuring the resistance between pins 7 & 10 of the input transformer. The value should vary from 0 to 200 ohms when rotating the input potentiometer.

47

MC624 Monitor Controller / 12 year old manual recommendations outdated

« Last post by Steveng on February 03, 2026, 02:33:10 AM »

JPK, 
as per a previous communication almost a year ago, you said you were going to update the section that spoke to the unit being controlled by TV remote and update suggestions, as to specific unit(s) that would work, I never got that info back from you. 
I've already gone thru a programmable remote that didn't work well, and I would like this advertised function to use.
Thanks, 
StG

48

MU524 Vari-Mu Tube Compressor / Re: Initial AC voltage jump

« Last post by CGMix on February 01, 2026, 05:16:02 AM »

Ok I hit all of those pads again, but still the same issue. The good news is now the issue is consistent and not intermittent anymore. but I should mention this happened before I re-soldered the pads. The issue is also on my right unit, so when I link both of my units together, it will pull the heavy compression on the left unit as well. 

49

MU524 Vari-Mu Tube Compressor / Re: Initial AC voltage jump

« Last post by JPK on January 30, 2026, 04:25:52 PM »

It looks like a sidechain gain issue.
Check the solder joints of R22, R23, R28, D4.

50

MU524 Vari-Mu Tube Compressor / Re: Initial AC voltage jump

« Last post by CGMix on January 30, 2026, 01:59:12 PM »

Yes it does. It’s still responding to signal, but it’s almost as if something is driving the input way up