Search found 1727 matches

by Joe Malone
Sun May 16, 2021 8:30 am
Forum: JLM Audio Kits
Topic: VUPPM Stereo Meter Compact Kit Build Thread
Replies: 0
Views: 18

VUPPM Stereo Meter Compact Kit Build Thread

http://www.jlmaudio.com/VUPPM500/VUPPM Stereo Compact.jpg PCB Component Build maps Display PCB http://jlmaudio.com/builds/maps/VUPPM500_display_map.html MAIN CPU PCB http://jlmaudio.com/builds/maps/VUPPM500_map.html COMPACT ANALOG PCB http://jlmaudio.com/builds/maps/VUPPM500_compact_analog_map.html...
by Joe Malone
Wed May 05, 2021 9:04 pm
Forum: JLM Audio Kits
Topic: AUX8 Build thread
Replies: 5
Views: 1328

Re: AUX8 Build thread

The AUX8 and SUM8 pcb is a 8 channel mono or 4 channel stereo depending on pots used with active virtual ground summing and 8 channel mono or channel aux master with inverting stage. So basically it can do 8in x 8out matrix. The pcbs are unbalanced in and out but if you use our palpigrade and tradig...
by Joe Malone
Tue Apr 27, 2021 7:48 am
Forum: JLM Audio Kits
Topic: Palpigrade Build Thread
Replies: 9
Views: 6279

Re: Palpigrade Build Thread

Hi Peter Great to hear you found the build easy. The stripe on the end of the zener diode lines up with the white stripe on the pcb overlay. Yes it is best to mount the zeners up off the pcb as they can run a bit hot. Check the power supply is set to 36 to 37vdc before connecting. The power supply +...
by Joe Malone
Sun Apr 25, 2021 5:23 pm
Forum: JLM Audio Kits
Topic: CBS Audimax ll mod
Replies: 8
Views: 4399

Re: CBS Audimax ll mod

Link555 wrote:
Sat Feb 27, 2021 1:57 am
Thanks again Joe, you Mods worked well. The journey is here:
https://recording.org/community/threads ... bay.65248/
Wow finally got to checkout the link. Nice build. Really like the new front panel look :-)
by Joe Malone
Sun Apr 25, 2021 4:17 pm
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 347
Views: 439109

Re: BA BA2 BA4 BAD Dual99v Build Thread

Ok +20dBu is perfect. Is the noise the exactly the same in both channels?

Does the noise stop instantly when the power switch is turned off?

Can you email me internal photos and power supply photo so I can check the build over.
by Joe Malone
Sun Apr 25, 2021 1:11 pm
Forum: JLM Audio Kits
Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
Replies: 111
Views: 132396

Re: VU BUFFER & PEAK LED KIT BUILD THREAD

Hello again, just finalizing the wiring schematic for my build and have an audio signal wiring related question. I have searched the forums and still need some clarification please. I am powering the VU buffer kit with an ungrounded and dedicated 24 VDC wall wart power supply. I am not powering any...
by Joe Malone
Thu Apr 22, 2021 6:45 pm
Forum: JLM Audio Kits
Topic: +/- 16 and 24V from ACDC vers2
Replies: 2
Views: 114

Re: +/- 16 and 24V from ACDC vers2

If the rail had been set to 48v before once the mod is done there will be a lot of trimpot turns before the level will drop down to 24v.

The 36v shows the mods are working but you will have to turn the trimpot lots of CCW turns before the volt start to drop and be set to 24v
by Joe Malone
Tue Apr 20, 2021 2:49 pm
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 34
Views: 35286

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

Ok! Victory, the rearranging of the opts did the trick. Thanks for your patience! HI Gary Cool great to hear :-) Please if you have any comments and/or photos of your JLM Audio gear in your rack please put them up on our social media page at the links below or send them to us by email as we work co...
by Joe Malone
Mon Apr 19, 2021 11:00 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 34
Views: 35286

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

I tried the realignment a bunch of times. Problem is I don’t know which comp has U1 Optos and which one has U2. Wouldn’t that matter? U1 matched pair and U2 matched pair are often the same. If one set has a slightly longer release time we mark them for U1 but often this is a very small difference.
by Joe Malone
Mon Apr 19, 2021 9:23 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 34
Views: 35286

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

Ok, I believe I have mixed up the opto pairs . 2 U1s in one comp and 2 U2s in the other.. Damn..How can this be rectified? Is there a test procedure I can do to tell which is which? I thought I was being careful but I obviously mis read these instructions. I would try realigning again just to be su...
by Joe Malone
Mon Apr 19, 2021 9:21 am
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 347
Views: 439109

Re: BA BA2 BA4 BAD Dual99v Build Thread

Post Mon Apr 12, 2021 1:18 am MichaelGNunn wrote: ↑ Hi Joe, I got everything together on my dual 99V and it sounds great aside from some noise issues! I looked through the forum, and it seems someone else has had this issue. It sounds like some electrical interference or grounding issue. can this b...
by Joe Malone
Fri Apr 16, 2021 11:40 am
Forum: JLM Audio Kits
Topic: MAC Rack kit Build Thread from October 2016 with slow attack led
Replies: 34
Views: 35286

Re: Mac Rack Calibration

Hello. First time here .I have been assembling a Mac Rack kit for a friend. I have reached the calibration stage and got everything set up perfectly on each channel separately but when I try to link the two channels I have had minor problems. I have a tone generator at 1Kh and 2 Voltmeters setup .T...
by Joe Malone
Tue Apr 13, 2021 11:54 am
Forum: JLM Audio Kits
Topic: Stereo VU meter kit BUILD THREAD
Replies: 92
Views: 83495

Re: Stereo VU meter kit BUILD THREAD

mobtownstudios wrote:
Tue Apr 13, 2021 12:03 am
Perfect!

I put the 3k3 resistor in place of the 680 and it's working WAY better for me!

Thanks Joe!
Cool. Must be very high Mcd LED like 10000. More efficient less power needed :-)
by Joe Malone
Tue Apr 13, 2021 7:31 am
Forum: JLM Audio Kits
Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
Replies: 111
Views: 132396

Re: VU BUFFER & PEAK LED KIT BUILD THREAD

Yes disable the rectifier on the vu buffer and wire the meter direct to the buffer pcb without the 3k6 resistor as the buffer has a 3k3 resistor on it already.

Looking forward to see the finished photos :-)
by Joe Malone
Mon Apr 12, 2021 4:18 pm
Forum: JLM Audio Kits
Topic: BA BA2 BA4 BAD Dual99v Build Thread
Replies: 347
Views: 439109

Re: BA BA2 BA4 BAD Dual99v Build Thread

Hi Joe, I got everything together on my dual 99V and it sounds great aside from some noise issues! I looked through the forum, and it seems someone else has had this issue. It sounds like some electrical interference or grounding issue. can this be fixed by getting a power conditioner that separate...