Search found 9 matches

by ghaudio
Fri May 26, 2017 1:08 pm
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Finally found a moment to get to testing this out. I discovered that the positive power line into Ch 1 dingo had worked itself loose so there was no connection. I corrected that. I removed the 4x 99v opamps and didn't see the VU's go back to -20db on power up. Then I encountered a new problem. Could...
by ghaudio
Tue May 23, 2017 1:14 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Hi Joe, have you had a chance to review the picture? Is there something else I can send to make this easier to resolve?
by ghaudio
Wed May 10, 2017 3:19 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Hi Joe, Picture of the MAC PCB below: I took this into a studio shop here in hollywood. Their tech helped me out. we measured +4dbu in, with all pots fully CCW, and with switches set as described in the calibration procedure. with +4dbu in, +4du came out, on both left and right sides. Both VU meters...
by ghaudio
Sun Apr 30, 2017 1:40 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Hi Joe, I've got the compressor all hooked up, all the lights work as expected, so I'm off to a good start. Now I'm getting into calibration. I'm referencing this page for cal instructions: http://www.jlmaudio.com/MAC/MACSCH.pdf In the first step with all pots CCW and VU switch set to VU, I'm gettin...
by ghaudio
Mon Apr 24, 2017 2:08 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Hi Joe, Might be a couple silly questions, but I'm going to ask anyway since it's not in the pictures. 1) do I solder all the legs from front panel switches onto MaC PCBs? (Only one leg shown soldered in the pics) 2) do I solder tabs from meters onto the extended end of the mac PCBs? Pretty sure it'...
by ghaudio
Tue Apr 11, 2017 11:42 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Hi Joe, can you confirm that the two 120k resistors are not used on the LA500POTv4 pcb? Didn't see them in the instructions, so wanted to verify. Also, on the same LA500POTv4, I see the you have the LED soldered to the underside of the PCB. Do you recommend fitting the LED with the front panel and t...
by ghaudio
Mon Apr 10, 2017 3:13 pm
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Another question for you, I managed to push one of the VU meters out of it's place in the chassis when pulling the unit from the box the other day. I noticed that there seemed to be some adhesive around the edge meant to hold it in place. Since I pushed it out it doesn't seem to stay in quite as we...
by ghaudio
Mon Apr 10, 2017 2:12 pm
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Another question for you, I managed to push one of the VU meters out of it's place in the chassis when pulling the unit from the box the other day. I noticed that there seemed to be some adhesive around the edge meant to hold it in place. Since I pushed it out it doesn't seem to stay in quite as wel...
by ghaudio
Sun Apr 09, 2017 6:18 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 25
Views: 29807

Re: MAC Rack kit Build Thread from October 2016 with slow attack led

Hi Joe, I ripped one of the 3 x blue 100nf mono ceramic caps for one of the dingo kits on the stereo MAC when pulling it out of its cardboard/tape wrapping. Would it be possible to get the exact specs for those so I can order a replacement? Seems like less trouble than asking for a replacement of su...