JLM AUDIO

Hey Joe, Sorry for the delay. I was doing a bunch of tests. I think I have it figured out, but I want to run this by you. Here's what I observed: -On the right channel, both the PAD and Phase switched caused issues. Sometimes one would cut the signal, sometimes the other, and sometimes in combinati...

Hi Joe, A strange new problem has started happening. The right channel works fine normally (although there's more hum than I remember with the gain turned up high), but once I engage the PAD, there is a lot of crackling and distortion, and when I disengage the PAD, the signal is gone entirely. The ...

Warbler wrote:Turns out this mic pre is totally fine. There was a combo of diagnostic stupidities, on my part, leading me astray. My apologies, and thanks for your willingness to help.

Finally back to work today for start of 2019. Great to to hear the mic pre is working

You are so helpful! I really appreciate that. https://i.ibb.co/9NypBXm/IMG-2355.jpg Build looks good. Start with the below and answer the questions and we should be able to get you going ASAP. OK check the 10pin plug going into the GO between input as it doesn't look fully plugged in. Sitting out a...

Thanks. That’s what I thought. I have a very low gain issue. Wondering what I did wrong. I’ll have to do some diagnosis, and potentially get back to you. Thanks again. OK Make sure if no DI fitted that you have the dummy plug fitted to the 3 header on the cable otherwise there is hole a on the audi...

Hi! Can you tell me how to wire the JLM1:4 to the go between board? The PCB is color coded for all the wires except the black. Thanks, Sean HI Sean black wire is not used. We cut it short and fold it back into the heatshrink tube at the bottom of the JLM14 or put a small piece of heatshrink over it...

I just received my LA500A kit and instead of a black relay labeled P-12, I got a white one labeled P-24. Does anyone know if this a part substitution? Sorry for the stuff up. Seems to be a one off mistake hopefully as all the rest of that batch here have P-12. Sending correct part out today to you....

If I wire a pair of 600 ohm/600 ohm transformers to the outputs of DAC, can I use a log volume pot of 50k or higher? Or I should still use a 5K to 10K pot? I like the effect of the transformer. OK. Thanks. I have another question. I ordered these kits as a make up gain for a stereo volume pot which...

Hi. I just ordered a large quantity of the these pcb´s which are going into a vintage Neve that i built a custom VU bridge for. There will be 16 small Simpson VU´s and 5 larger ones. My question is if i can omit the parts on the pcb that relates to the peak LED? I will most likely not use this feat...

Hey Joe, Noticed there is foot prints for 2520 DOA for this as well. How does that all work? Thanks! Yes the main audio path for the EQ is made of 4 x opamps which can be dual DIP8 running in parallel or 4 x discrete opamps with 990 or 2520 pinouts like our JLM99v. Awesome! I'm assuming this means ...

Blackdawg wrote:Hey Joe,

Noticed there is foot prints for 2520 DOA for this as well. How does that all work?

Thanks!

Yes the main audio path for the EQ is made of 4 x opamps which can be dual DIP8 running in parallel or 4 x discrete opamps with 990 or 2520 pinouts like our JLM99v.

Or i could take another LED and try it outside the meter? By the way - is there an easy way to open the meter and change the LED? Thanks a lot for your help, Joe! Yes as long as you wire the led the correct way around that will work. The round section of the meter unclicks from the square section o...

Thank you for the fast reply Joe. But I‘m a bit confused now. When will we use the regulator (and corresponding caps)? I understood how the control port works and would have gone to feed my dc in Version 1 exactly there-because of four linked pads on each side.In version 2 it seems to be two pairs ...

Hello Joe, I‘ve ordered one of these kits (12vdc version),it is on its‘ way to me now. I see there are two versions now and don‘t know which one I will receive.I‘m happy with either one. Just in case it is V2: 1.:The added regulator is to add more stabilty (I‘m a bit concerned about 78xx type regs,...

Hello Joe, the meter light of my MAC has gone dead and i wondered if there's voltage on or if it's the light in the meter. Took the multimeter to it and got +30 volts ... :? So there's additional wondering if something on the board crapped out. 30 volts seem a bit high and maybe that blew out the l...