1

CP5176 FET compressor / Re: JMP 1

« on: July 08, 2022, 07:13:34 PM »

anyone have any experience of this?

2

CP5176 FET compressor / JMP 1

« on: July 06, 2022, 07:34:27 PM »

Hi,
After soldering JMP 1 on stage 11 of the build, solder one and then check it's vertical then solder the other pins....
Do we trim those pins afterwards?

3

SK25/SK99 Discrete Op-Amp / Re: The glue on Diodes D5 & D6....

« on: July 05, 2022, 07:09:05 PM »

Thanks!

4

SK25/SK99 Discrete Op-Amp / The glue on Diodes D5 & D6....

« on: July 01, 2022, 07:52:21 PM »

When it says to put some instant glue on diodes D5 & D6, is that like any kind of glue? I've got some Gorilla glue around here somewhere...
Or does it have to be special thermal glue or something?

5

LA502 Optical Compressor / Re: 1vac on output

« on: April 26, 2022, 06:35:20 PM »

OK.
For all the other noobs this may prove useful.
My basic assumptions were wrong. A friend and made up some XLR cables for me. He put the live, shield, etc on different pins to what is normally used. He was consistent in the leads themselves but not what is standard. Realised when I took the male and females off. 
Using a standard cable I was able to get a VAC reading.
Made the necessary adjustment (volume not frequency iirc..) to obtain 1VAC on the output.
Then follow the set up instructions as written by JPK.
The potentiometers don't stop turning but don't worry. Just do the 20 turns JPK says and treat that as 0.
I'm writing this in case it helps anyone as basic in their knowledge as me.

6

LA502 Optical Compressor / 1vac on output

« on: April 22, 2022, 06:57:34 PM »

OK, having setup issues.
I'm worried I'm misunderstanding some basic stuff.

First, the potentiometers never stop turning. No matter how many times i turn they can always turn some more. P3 & P4 click after a while but never stop turning. P5 doesn't click and can be turned continuously.

Test point 0V and V+ 15.75v
Test point 0V and V- -16v


input transformer 
1&5 = 2.21ohm
6&10 = 1.81ohm

output transformer 
1&3 = 4.8ohm
6&8 = 5.4ohm
9&12 = 11.5ohm
13&16 = 11.5ohm


I've got Logic as a DAW and a Cranborne R8 as a rack and interface. Worried I'm doing something wrong so if there's anyone else with a similar set up please feel free to advise me!
I've put the extender in slot 1. There are some other units in but I presume that's ok as I'm using the extender.
I've put a sine wave on a Logic channel and set the I/O to 1 on input and output.
The sine can be heard through the speakers. I then connect an XLR lead to the module output on the back on the R8
and tried to get an AC measure against pins 2&3. In fact any pins. Nothing. Then I thought maybe the speaker lead so I disconnected that and measured it. Nothing. Get a reading with one pin but nothing with two.