Search found 1580 matches

by Joe Malone
Sun Jan 12, 2020 10:14 am
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 248
Views: 261482

Re: JLM 60Watt Power AMP Kit

Yes regurg kit is made to do bal in to bal out with up to 18dB gain. The 60w amp kit is a slave amp hi made to take high line level. Most guitar amps are actually a preamp with amp. If using our 60w amp kit you can get more gain from the amp by making the 1k resistor small value. Also if not using t...
by Joe Malone
Sun Jan 12, 2020 10:07 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 88
Views: 83760

Re: Regurgitator kit Build Thread

Yes regurg kit is made to do bal in to bal out with up to 18dB gain. If using our 60w amp kit you can get more gain from the amp by making the 1k resistor small value. Also if not using the volume control on the amp kit use the volume+/- as the audio input instead to get a few dB more gain from the ...
by Joe Malone
Tue Dec 17, 2019 12:46 pm
Forum: JLM Audio Kits
Topic: LA500A opto comp leveling amp BUILD THREAD 500/51X
Replies: 151
Views: 107932

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

Hi there! I built a LA500 and to my amazement it worked straight away. It sounded fantastic, I was super happy with it and was gleefully using it as my main vocal compressor on the way in. I had it up and running for about 3 weeks. Since then I've had some issues. At some point the Rupert Neve R6 c...
by Joe Malone
Sun Dec 15, 2019 4:20 pm
Forum: JLM Audio Kits
Topic: Tardigrade Build Thread
Replies: 7
Views: 880

Re: Tardigrade Build Thread

survivorsound wrote:For gains between 6dB and 12dB, one would add a resistor across the gain pads, correct?


Yes correct add 6k8 across the gain pads for 10dB.
by Joe Malone
Tue Dec 10, 2019 9:57 pm
Forum: JLM Audio Kits
Topic: Talkback Comp Build Thread
Replies: 16
Views: 6636

Re: Talkback Comp Build Thread

I'm sorry Joe, i ment to update my post... Mic worked fine using the standard (2 x 6k8) supply as on the pcb. It's an Astrada conference mic 952.353UK (just the gooseneck mic part) All working nicely on our Calrec. I added a 1k Log pot across the output for volume and a cheap OEP a262a2e transforme...
by Joe Malone
Tue Dec 10, 2019 8:19 pm
Forum: JLM Audio Kits
Topic: Talkback Comp Build Thread
Replies: 16
Views: 6636

Re: Talkback Comp Build Thread

So i couldn't find a high brightness LED that would work so i made a little TL072 buffer circuit to drive an GR LED. Works well. Next question.. How would i go about powering an Electret (TB) mic with this circuit? Can i just remove one of the 6K8 resistors and put a 9V zener across the PP to ON ju...
by Joe Malone
Tue Dec 10, 2019 7:55 pm
Forum: JLM Audio Kits
Topic: Micro Passive Mixer Build Thread
Replies: 2
Views: 7744

Re: Micro Passive Mixer Build Thread

Miko wrote:I need a simple 8 into 1. Would any additional resistance be required for tying L to R?


No extra resistors needed. Just link L+ to R+ and L- to R- and you have 8 to 1.
by Joe Malone
Thu Dec 05, 2019 1:18 pm
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 29
Views: 19389

Re: POWER PLANT BUILD THREAD

Hi Joe, I CHanged the Regs and everything works fine now. Thank you for your help. I have a question too. In the power plant page, its written that can feed 4 modules. Even those telefunken or neumann cards with 2 channels per module?? Thank you! Cool great to hear you got it working ok. As long as...
by Joe Malone
Tue Dec 03, 2019 9:03 pm
Forum: JLM Audio Kits
Topic: ADM 1540 EQ MOD INPUT to BALANCED IN
Replies: 6
Views: 7785

Re: ADM 1540 EQ MOD INPUT to BALANCED IN

I think i worked it out by myself. There's a huge pad on the input, 40db. It's extremely hard to read from the schematics. What i ended up doing is this. A new pad in front of the input transformer (Lundahl LL2603 1:1) thats attenuating 25dB.The secondary of the 2603 is terminated via 2k plus 1,6nf...
by Joe Malone
Sat Nov 30, 2019 7:40 am
Forum: JLM Audio Products
Topic: VUPPM 500 Meter Calibration ?
Replies: 3
Views: 170

Re: VUPPM 500 Meter Calibration ?

Hello Joe, Oh ! Then I have decalibrate my new VUPPM :oops: I'm not in my studio this week so I can't recalibrate it now but when I try the first time, my problem was that the VU/PPM trimpots had no action. (The green VU level didn't move) Is it possible ? I will try again ASAP and tell you ! Thank...
by Joe Malone
Wed Nov 27, 2019 10:05 am
Forum: JLM Audio Products
Topic: VUPPM 500 Meter Calibration ?
Replies: 3
Views: 170

Re: VUPPM 500 Meter Calibration ?

Hello Joe, I just received your wonderful VUPPM 500 Meter, thank you very much ! I have tried to calibrate the VUPPM as describe : Send in 1k tone at 0dFS or +18dBu to 500 Input for left and Output for right. Set mode to VUPPM mode RED PPM with GREEN VU over the top. Adjust Left and Right level tri...
by Joe Malone
Wed Nov 13, 2019 10:45 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 29
Views: 19389

Re: POWER PLANT BUILD THREAD

Hi thanks for your reply. I cleaned the pcb with isopropilic, but is dificult to take a picture showing the traces, cause it shines with the light I hope you can see something. So I have to change one of the regs, or better both? one or both The trim for the 24v now doesn't works, I dont know if I ...
by Joe Malone
Tue Nov 12, 2019 9:34 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 29
Views: 19389

Re: POWER PLANT BUILD THREAD

Oh, I thought I sent it attached. Let me try again The bottom of the pcb needs a good clean with isocol or iso prop and toothbrush to see properly but I can see that one centre leg on the trimpot has never been soldered so will not work. Since the 3 x 120R burnt the 48v reg is likely to be dead sho...
by Joe Malone
Wed Nov 06, 2019 10:10 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 29
Views: 19389

Re: POWER PLANT BUILD THREAD

Hi! Im having some problems with my second power plant. Some 120r resistors got burned and I changed them with new ones. Now the 48v rail marks 24v And 24v. Rail marks 35,6 v. Im sending you a photo if hepls. Thank you very much! Ok yes attach some photos of the top and bottom of the pcb here or em...
by Joe Malone
Thu Oct 31, 2019 9:52 pm
Forum: JLM Audio Kits
Topic: AC/DC & POWERSTATION KIT BUILD THREAD
Replies: 319
Views: 277626

Re: AC/DC & POWERSTATION KIT BUILD THREAD

Hi Joe, Here is my sad tale: I built a v3 AC/DC with 48v and +/- 28v and it worked great for many months powering a DIY mic pre. Then one day it blew a mains fuse, I disconnected from the mic pre, replaced the fuse, and 48v had turned into 5v. I then replaced R7 because it was blown up and D10 beca...

Go to advanced search