Well, it does actually look like it is connected to ground in the schematics?? (See the attached picture)If that 47uf cap negative goes to ground, it'll be fine.It may not though so be sure.
Any components next to it may have a connection to ground as well. Just use your meter to check.
The 100uF negative goes to ground. Tried checking with the multimeter, and there was a connection between the two although the pad fell off...Not sure what you're trying to say. The 100uf cap negative you are saying goes to ground? Or the 47pf cap has a ground? You had mentioned a 47uf cap. Too bad the components on the pbc aren't silkscreened. Would make it a bit easier.
Thank you for the reply anyway! I tried measuring with the multimeter between the cap (where the pad fell off) and the point at the PCB that says GND on the right side of the PCB. And there was a connection, so I'm quite sure that it's okay.Looks like that's a ground connection. If you aren't able to get a good connection to ground because of the damaged pad, you could try connecting the negative side of the capacitor to the bottom leg of that 1k8 resistor right next door (on the schematic). Everything along that horizontal line is connecting to ground, presumably through a ground plane on the board.
EDIT: For some reason, the site only showed me Mugge's first question about this damaged pad until I replied, at which point it suddenly loaded a whole bunch of extra responses lol. Guess this has been answered already.
Hi LinusHello, i have finaly put my ms76 together but i guess i have put in VU meters whit the wrong impedance. It was impossible to callibrate. Does anybody know the right specs?
"way too high" is a little vague.Ok, when i send the 0dBU signal the meter cant reach 0, only -10 or -7 (if i boost the signal way too high).
I dont really have the mindset to do troubleshooting via video, and in my experience, its really a mess for trouble shooting. Maybe someone else reading the thread, who reads video better than me can chime in on that.sorry "way to high" is not so specific
I made a little video to show how the compressor respond to the 1khz sine wave (0:22 mobile phone in to a preamp whit balanced output in to the input of the MS76)
How do i check the 1206 output?
Hi James.Hey all, I'm gonna chime in with my experiences here. Thanks for reading and for any insight anyone is able to offer.
First, just a little overview of my build experience. I'm an amateur builder but have done many small builds and have recapped/troubleshot a bunch of vintage circuits successfully. I dealt with the headache of sourcing many missing parts in my kit (meter hardware, mounting hardware for the power pcb and voltage regulators, missing resistors, the 6pin molex pinouts/cabling, and the default extra pots that were mentioned in the note). I ended up spending quite a lot of money after shipping costs ...and after 'finishing' the build, my unit is having issues. With all this adding up, I'm pretty frustrated but I'm trying to keep focused so that I get this working. Thanks for all the useful links in this thread so far from other users and Gustav - many have been very helpful.
The meter in "VU in" should show you what you have on the output pin of the 1206.the 1206 seems to be ok. Checked the input (3) and output (6) whit my old oscilloscope and the sine wave looked the same.
Also checked the voltage test-points on the pcb and they seems to be ok (diffed 0,1-0,2v on some points)
The needle moves but only to about -10, 0 is impossible. The signal reaches the + on the meter but is weaker when i test it whit the oscilloscope.Does it do that, and does the meter level reflect increases/decrases in level sent to the unit?
Im sorry for being unclear.The needle moves but only to about -10, 0 is impossible. The signal reaches the + on the meter but is weaker when i test it whit the oscilloscope.
This is the type of VU meter i use to the project: 2pcs TN-73 VU Meter Power Verstärker DB Ebene Header Audio Meter Chassis | eBay
Just to be shure, the on-off switches in the blend pots is not connected to the +12v and the pcb, is that a problem?
The TN73 seems to be a 1mA meter, (missing the internal rectifier) , so not a true VU-meter.This is the type of VU meter i use to the project: 2pcs TN-73 VU Meter Power Verstärker DB Ebene Header Audio Meter Chassis | eBay