Search found 2 matches

by scissor
Wed Oct 07, 2015 3:45 pm
Forum: JLM Audio Kits
Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
Replies: 221
Views: 216086

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

...Like previous posters my comp works but appears to be suffering from the side chain oscillation problem....How would you suggest I proceed from here? First make sure you have C8 47pF fitted on the LA500 pcb under the JLM99v opamp. Second make sure you have C2 100pF fitted on the MAC pcb. If osci...
by scissor
Tue Sep 29, 2015 11:35 am
Forum: JLM Audio Kits
Topic: LA500 opto comp leveling amp BUILD THREAD 500/51X
Replies: 221
Views: 216086

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

Hi Joe, my name is Greg. I've just built my first LA500 and am experiencing a small problem. Like previous posters my comp works but appears to be suffering from the side chain oscillation problem. Voltage on audio out @ 1kHz is 1.23VAC. GR meter shows about -2dB (I'll let it warm up next time I re ...

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