Search found 1651 matches

by Joe Malone
Sat Sep 19, 2020 10:33 am
Forum: JLM Audio Products
Topic: VUPPM 500 Meter Calibration ?
Replies: 5
Views: 4199

Re: VUPPM 500 Meter Calibration ?

Hello...D9 is discretionary to raise the limit level. You can utilize an arrangement series of diodes and zeners to have switchable limit levels. Ordinarily you would simply short the limit sticks together to empower the comp . Increase pot for best control on front board use is a 10k fire up log p...
by Joe Malone
Fri Sep 18, 2020 9:37 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 107
Views: 120926

Re: Regurgitator kit Build Thread

Driving an unbalanced load, do you leave pin 3 disconnected and the gain range shifts down by 6dB? If pin 3 is grounded at the load (to keep the gain range the same), does it stress the inverting amp by forcing it to drive 51 ohms, or does that pressure get relieved through the gain trim somehow? Y...
by Joe Malone
Mon Sep 07, 2020 10:54 am
Forum: JLM Audio Kits
Topic: 500 Tester Dual and Single Build Thread
Replies: 2
Views: 189

Re: 500 Tester Dual and Single Build Thread

Kifore wrote:
Mon Sep 07, 2020 3:00 am
Thank you for the links, I will order soon 500 Tester Dual Build. Can you deliver to Europe? All September I will by at my parents Munich home
OK cool. Yes we send several parcels every day to Europe :-)
by Joe Malone
Wed Sep 02, 2020 1:02 pm
Forum: JLM Audio Kits
Topic: 500 Tester Dual and Single Build Thread
Replies: 2
Views: 189

500 Tester Dual and Single Build Thread

500 Tester Dual and single Build Thread Dual 500 Tester build map at link below http://jlmaudio.com/builds/maps/500Dual_Map.html Dual 500 Tester build map at link below http://jlmaudio.com/builds/maps/500Single_Map.html https://www.jlmaudio.com/500 Tester/500 TESTER DUAL BACK 640.jpg https://www.jl...
by Joe Malone
Sat Aug 29, 2020 2:04 pm
Forum: JLM Audio Kits
Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
Replies: 125
Views: 148585

Re: 8PAKAMP & 12PAKAMP KIT BUILD THREAD

Does this help? https://emotiva.com/products/xsp-1 Not really but wasted a lot of my time reading all of this. But since they use dBV it will not be pro output level. The balanced out seem to only have the rca output level +6dB due to the balancing. If you have a scope you can check the output leve...
by Joe Malone
Sat Aug 29, 2020 12:12 pm
Forum: JLM Audio Kits
Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
Replies: 125
Views: 148585

Re: 8PAKAMP & 12PAKAMP KIT BUILD THREAD

Hi Joe- So I have the amp working, it’s playing, just not as loud as it should be . To refresh your memory: 8pakamp, bridged Into 2 channels. I am running xlr from a Emotiva preamplifier (Xsp-1). I am also getting audible distortion at moderate volumes. Where would you suggest I begin with my troub...
by Joe Malone
Sat Aug 29, 2020 12:06 pm
Forum: JLM Audio Kits
Topic: LA500A Kit Issue
Replies: 4
Views: 232

Re: LA500A Kit Issue

The build looks fine. The meter LED may have accidentally been blown during the testing which will stop the comp from removing the hard bypass relay. With switch in VU or GR and module powered up measure voltage across the 2 meter LED terminals led A and Led k on the meter should be around 2v. If vo...
by Joe Malone
Wed Aug 26, 2020 10:27 am
Forum: JLM Audio Kits
Topic: LA500A Kit Issue
Replies: 4
Views: 232

Re: LA500A Kit Issue

I purchased and assembled the mentioned limiter kit some time ago, and took it to a friend's audio shop for calibration. We discovered that while the unit was electrically active, the front meter was not lighting up, in fact that entire front circuit panel wasn't responding. Could it be an issue wi...
by Joe Malone
Sat Aug 22, 2020 9:49 am
Forum: JLM Audio Kits
Topic: Talkback Comp Build Thread
Replies: 18
Views: 15736

Re: Talkback Comp Build Thread

I have a slight issue with the TB amp. I'm getting a loud pop when turning the TB on and off. Is there a way to eliminate this? Could it be DC on the relay contacts? HI if built properly there should not be any dc on output. If getting pops make sure you are not sending phantom power into the outpu...
by Joe Malone
Tue Aug 18, 2020 10:57 am
Forum: JLM Audio Kits
Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
Replies: 125
Views: 148585

Re: 8PAKAMP & 12PAKAMP KIT BUILD THREAD

Hi there- I am a bit confused as to where the speaker out wires go. I have bridged to two channels (4 amps per). I am ready to test, with this exception, so any guidance would be appreciated :? :( See attachment for better output detail. The ceramic resistors glue to each other and the any metal pa...
by Joe Malone
Wed Aug 05, 2020 10:57 am
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 170
Views: 152542

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

Mattsoniclab wrote:
Fri Jul 31, 2020 8:55 am
woohoo!
All finished and sounding great. Thanks for the excellent kit and easy to follow instructions Joe. I can see how much work goes into these.
Now to shove some drums through it. ;)

cheers.
Matt
HI Matt
Great to hear you liked building the comps :-) Hopefully the drum tracking went well ;)
by Joe Malone
Wed Jul 29, 2020 10:34 am
Forum: JLM Audio Kits
Topic: Go Between and Go Between Plus kit BUILD THREAD
Replies: 33
Views: 55222

Re: Go Between and Go Between Plus kit BUILD THREAD

Hello! I've used the Go Between kits on several projects now but I just tried adding a Variable Pad kit to the front end of a preamp for the first time and, when phantom power is applied, the variable pad pot is extremely scratchy. With phantom power off, all is well with the world. Is this a known...
by Joe Malone
Wed Jul 22, 2020 1:02 pm
Forum: JLM Audio Kits
Topic: Passive Controller Build Thread Ver 1 & 2
Replies: 47
Views: 35704

Re: Passive Controller Build Thread Ver 1 & 2

Hi Joe I have built the controller along with the tascam breakout pcb and I am not getting any sound out at all. I suspect the issue lies in the ICB connections on the 26 wire ribbon cable and I am in the process of getting more connectors for this. Can you please confirm that I have the dual 10k p...
by Joe Malone
Fri Jul 17, 2020 5:25 pm
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 170
Views: 152542

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

So I just came back to my bench to do some more testing and now everything is fine. I put it back together and all the voltages are correct. I have absolutely no idea why but I guess as long as its working.... From your other posts it will be a opto or other component leg under the sidechain pcb to...
by Joe Malone
Thu Jul 16, 2020 4:15 pm
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 255
Views: 323162

Re: JLM 60Watt Power AMP Kit

Hi. Just curious if there is a way to incorporate a mono sum switch when using two amps, not in bridge mode? I'm building a stereo amp to run a pair of Grover Notting CR1 speakers in my studio, and it would be great to quickly flick a switch to check it in mono. thanks! Matt HI Matt Yes if you link...