JLM AUDIO

Thanks for your help!

Finished up this rack of 2 Fairchild EQ's with your gain PCB's for make up gain, sound great., kinda like a LANG.

THANK YOU - you have been incredibly helpful. Much appreciated.

Joe sorry to bother you again.

Jensen here in the US has no supply, backordered for long time on the JT-16-A.

Could you let me know same info, RLoad, RZobel, CZobel for this model recommended substitute.
https://www.jensen-transformers.com/wp- ... 15K-e1.pdf

Thanks,

Joe

Hi Joe,

I'm planning on feeding (2) GAIN kits from (2) Jensen JT-16-A for MIC pre input.
https://www.jensen-transformers.com/wp- ... -16-a1.pdf

Can you tell me what to fit for CZ,RZ,RLoad,CLoad?

Thanks,

Joe

Ok! So I bought multiple GAIN PCB, so I did up another from scratch and works correctly.
Thanks for your help with my 1st DIY.

***One question regarding connecting power to (2) units.

Series or parallel from your: 48v 25w 520mA Switch Mode Power Supply. ??

Thanks!

Joe

RLOAD is 600Ω, what the EQ wants to see.

I little messy on this test unit from larger parts I had in stock, but I checked every connection, I must one missing something.

Thanks for the help, I get one right, I can do the other 5...

Still not getting Gain, but voltage readings V+, 1/2V, 0V, Out now look correct.

Ok, Should V+ be the total voltage? I set to 22v, should that be 44v to get +/- 22 to the DOA? -- the DOA is your Flick.

Struggling a bit with this PCB but I know I'm close. I have the Gain PCB voltage set to DOA @ 22vdc 1k resistor in RGAIN 10k rev log pot: GAIN to wiper, 0v to outer lug So, with no DOA inserted I read from the DOA PCB pins: +V=22vdc, 1/2=11vdc, Out=10.29vdc? This correct? It'll pass audio with the D...

JLM Twenty Five Twenty can run on this PCB +/-24, correct?
Just Link C to E?

I assume the 2520 note for the DOA 32v +/-16 rails for this PCB is just for Api-Originals, right?

Thanks!

Does IC1 need to be fitted at all if using unbalanced out?

Which 33R & 47pF are not needed if unbalanced out?
The ones closer to IN/OUT
or
The ones closer to GAIN/POWER

Joe

Hi - Looking similar application with passive EQ makeup gain. A little confused-- RGain - fixed resistor setting the max gain from DOA? GAIN - 10k Rev log applied to control/trim the gain. Do I need to have a resistor value inserted into "RGain" if I just hook up the the C10K pot to "Gain" and that ...