Search found 39 matches

by G-Sun
Tue Oct 31, 2017 7:22 pm
Forum: JLM Audio Kits
Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
Replies: 221
Views: 216085

Re: LA500 opto comp leveling amp BUILD THREAD 500/51X

Now, look here:

IMG_20171031_101626965.jpg


Seems like we've found the course.
Remember when soldering that this spot seemed a little weak :)

Fixed. Working perfect again. Thank you!
by G-Sun
Sun Oct 29, 2017 7:05 pm
Forum: JLM Audio Kits
Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
Replies: 221
Views: 216085

Re: LA500 opto comp leveling amp BUILD THREAD 500/51X

Yes first try a wire across the outside terminals of the meter to bypass the led and see if the comp works without led just to check all the wiring is ok. Led is white clear 5mm about 800 to 1000mcd. We have the LED as spare part on our website if you are trying to match other LA500 meter lights ex...
by G-Sun
Fri Oct 27, 2017 11:57 pm
Forum: JLM Audio Kits
Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
Replies: 221
Views: 216085

Re: LA500 opto comp leveling amp BUILD THREAD 500/51X

Email me some clear in focus photos of your build so I can check it over. And answer all of the below questions. The unit has worked perfect for some 3 years. Please tell me if you need the pictures after reading this post. Does the meter light? If NO link over the outside 2 terminals on the meter ...
by G-Sun
Wed Oct 25, 2017 5:05 pm
Forum: JLM Audio Kits
Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
Replies: 221
Views: 216085

Re: LA500 opto comp leveling amp BUILD THREAD 500/51X

Hi! My meter-light died. How may I replace it? Hello G-sun, the squared and the round part can be detached.Take care when doing that,gently tear them apart.No brutal force please,or you might damage the meter or bend the needle. Then gently tear apart the white inlay. After that you can reach the l...
by G-Sun
Sat Oct 21, 2017 2:07 am
Forum: JLM Audio Kits
Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
Replies: 221
Views: 216085

Re: LA500 opto comp leveling amp BUILD THREAD 500/51X

Hi!

My meter-light died.
How may I replace it?
by G-Sun
Tue Apr 26, 2016 4:37 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 86
Views: 82466

Re: Regurgitator kit Build Thread

Yes connect forssell ground to pin 3 and pin 1 on regurg input. yes Pin 1 in and out is connected to 0v power on regurg. So you should only need the +/- power rails as 0v ground is already connect from the output of the forssell to pin 1. Thank you very much! It's really helpful for a not-so-skille...
by G-Sun
Mon Apr 25, 2016 2:08 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 86
Views: 82466

Re: Regurgitator kit Build Thread

I have a Forssell Opto comp with unbalanced out, + (2) and ground (1)
and are going to use the Regurgitator for balanced out.

Do I connect
forssell ground
to
Regurgitator input 3 minus; 1 ground; or not connect?

And on Regurgitator is ground out/in pin1 connected with pcb ground?
by G-Sun
Mon Apr 11, 2016 3:04 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 149
Views: 105671

Re: LA500A opto comp leveling amp BUILD THREAD 500/51X

Joe Malone wrote:
G-Sun wrote:
If pin 1 to pin 3 is shorted then transformer out has a full path so will work full range.

Thanks!
by G-Sun
Thu Apr 07, 2016 7:51 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 86
Views: 82466

Re: Regurgitator kit Build Thread

Is this best mounted utilizing the XLR?
If using terminal blocks only, then?
by G-Sun
Thu Apr 07, 2016 4:57 pm
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 149
Views: 105671

Re: LA500A opto comp leveling amp BUILD THREAD 500/51X

The RNLA is unbalanced in but with TRS socket. So plugging a balanced transformer out into this leaves the output open circuit on one side so you will only get a bit of high frequncy bleeding to the RNLA. Use a XLR to mono guitar jack cable and it will work fine. Thank you! Yes, I've never quite un...
by G-Sun
Wed Apr 06, 2016 9:01 pm
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 149
Views: 105671

Re: LA500A opto comp leveling amp BUILD THREAD 500/51X

Since the fault keeps changing I would be check all your soldering. Clean the bottom of the PCB's with isocol and a old toothbrush and resolder any bad soldering will fix 90% of problems. Bypass and comp in output with makeup & threshold at minimum should be the same level. Thank you! I believe...
by G-Sun
Tue Apr 05, 2016 3:30 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 149
Views: 105671

Re: LA500A opto comp leveling amp BUILD THREAD 500/51X

I put in a dip-socket and Burr Brown OPA 2604 and took out the JLM 99V Worked fine on install, but now it's something wrong. Anything I should watch out for? Voltages or anything that should be connected different? The OPA2604AP can be plugged in with no changes with output transformer. The OPA2604...
by G-Sun
Sat Apr 02, 2016 9:50 pm
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 149
Views: 105671

Re: LA500A opto comp leveling amp BUILD THREAD 500/51X

I put in a dip-socket and Burr Brown OPA 2604
and took out the JLM 99V

Worked fine on install,
but now it's something wrong.

Anything I should watch out for?
Voltages or anything that should be connected different?
by G-Sun
Wed Feb 10, 2016 8:47 pm
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 149
Views: 105671

Re: LA500A opto comp leveling amp BUILD THREAD 500/51X

Joe Malone wrote:You could try a pair of fast optos but you will only be able to run and calibrate one type at a time as each opto type will need a completely different calibration setup.

So no you cannot reuse the ratio switch for this as a lot more switching and parts would be needed.

Ok, thanks!
by G-Sun
Fri Feb 05, 2016 2:42 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 149
Views: 105671

Re: LA500A opto comp leveling amp BUILD THREAD 500/51X

Joe: I'm sure you've tried different optos for the LA500. And, if choosing just one, I'd say you've found a very good all round performer. Yet, if having many LA500, I wonder: Could it be realized with a very fast/ fast opto. And have you considered selling part kits for something like this? Second ...

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