Search found 5 matches
- Fri Feb 24, 2012 11:08 pm
- Forum: JLM Audio Kits
- Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
- Replies: 223
- Views: 635689
Re: LA500 opto comp leveling amp BUILD THREAD 500/51X
Hi Joe. So I've just got around to checking that the 2 units are tracking correctly when linked. I decided to re-calibrate first, but came across a strange problem - I'm sending a 1khz tone through my desk, meters are hitting 0db on the desk, patching the compressors to the master bus. I'm unable t...
- Mon Feb 13, 2012 4:32 am
- Forum: JLM Audio Kits
- Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
- Replies: 223
- Views: 635689
Re: LA500 opto comp leveling amp BUILD THREAD 500/51X
Hi Joe. So I've just got around to checking that the 2 units are tracking correctly when linked. I decided to re-calibrate first, but came across a strange problem - I'm sending a 1khz tone through my desk, meters are hitting 0db on the desk, patching the compressors to the master bus. I'm unable to...
- Tue Feb 07, 2012 7:46 am
- Forum: JLM Audio Kits
- Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
- Replies: 223
- Views: 635689
Re: LA500 opto comp leveling amp BUILD THREAD 500/51X
got it sorted. one of the solder joints had been pulled up off the board - probably when I pushed the cable in with too much force
on another note, the 2 compressors aren't compressing the same amount when linked.. Pretty sure they are calibrated correctly but I will check.
on another note, the 2 compressors aren't compressing the same amount when linked.. Pretty sure they are calibrated correctly but I will check.
- Sat Feb 04, 2012 9:22 pm
- Forum: JLM Audio Kits
- Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
- Replies: 223
- Views: 635689
Re: LA500 opto comp leveling amp BUILD THREAD 500/51X
Yes, it's the transformer. the Ohmmeter readings are ok but swapping the transformers over between units results in the problem moving also. Switched ribbon cables as well but that seems fine.
- Sat Feb 04, 2012 12:05 am
- Forum: JLM Audio Kits
- Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
- Replies: 223
- Views: 635689
Re: LA500 opto comp leveling amp BUILD THREAD 500/51X
Thanks for the info Joe, i've finished building my 2nd LA500 but there's a problem. Compression works, but with compression 'in', the low freqs rolls off around 1khz and there's a level drop around 7db. In bypass the signal is normal. I've swapped over the red pcb with my good unit and the problem i...