Search found 6 matches

by hasbeen
Fri Jul 28, 2017 6:45 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 150
Views: 106173

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

The transformer in one of my pair seems to be too fat to fit comfortably in a rack with other modules. The other unit seems fine. Has this been a problem?


BTW I sent you a PM on another matter. Thanks
by hasbeen
Thu Jul 27, 2017 11:08 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 150
Views: 106173

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

Why haven't the build instructions been updated to inform the builder that it is okay to use the other holes? Am I missing another set of instructions somewhere? I just finished my pair today. The holes are not for the kit but will work. They are for our built production LA500A modules so we can pl...
by hasbeen
Wed Jul 26, 2017 11:16 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 150
Views: 106173

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

Can you clarify what exactly all the jumpers are for in the builds?

Also confirm that there is no need to calibrate as a stereo pair if I ordered 2 units as a pair. I received the specially marked optos and installed as indicated.
by hasbeen
Wed Jul 26, 2017 11:10 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 150
Views: 106173

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

Okay, sorry I refer that was as the Mac. Had to de-solder the meter to remove PCB and get shots of the board. I've attached photos and will send the voltages from the op amp on the LA500SC PCB after re-assemby. IMG_5285.JPG IMG_5286.JPG This photo shows the opto leads have been soldered in to the &...
by hasbeen
Wed Jul 26, 2017 4:03 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 150
Views: 106173

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

Okay, sorry I refer that was as the Mac. Had to de-solder the meter to remove PCB and get shots of the board. I've attached photos and will send the voltages from the op amp on the LA500SC PCB after re-assemby. IMG_5285.JPG IMG_5286.JPG This photo shows the opto leads have been soldered in to the &...
by hasbeen
Sat May 14, 2016 9:39 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 150
Views: 106173

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

In some of the pictures the builder is holding the component in place with a thumb and soldering with the other hand. I am curious as to how one can apply the solder in such a manner. I usually have solder in one hand and iron in the other while PCB is laying on a flat surface. Thanks. :?: :?: :?:

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