Re: LA3A 500 BUILD
« Reply #500 on: March 21, 2015, 05:08:31 PM »
Will these pots work?
100K-Ohm Audio-Taper Potentiometer : Potentiometers | RadioShack.comhttp://www.radioshack.com/100k-ohm-audio-taper-potentiometer/2711722.html
Link doesn't work for me, but 100k audio taper appears correct. Check dimensions for fit.

Ok next question. Do the EL Panels have to light up green???? I found blue but I want to be sure before I pull the trigger


Re: LA3A 500 BUILD
« Reply #501 on: April 20, 2015, 10:17:53 PM »

I got my El panel finally working. ended up having a short. That is now rectified, but I am struggling with an other issue.

The Squish (comp) pot will adjust the output of the panel, but so will the Output pot. I can have the "squish" all the way up, but if I back off the output the El Panel will dim. I am also not seeing compression of the signal, but I do see a change when engaging the Comp/Limit switch.

Any thoughts?

dmp

Re: LA3A 500 BUILD
« Reply #502 on: April 22, 2015, 05:41:57 PM »
Quote
The Squish (comp) pot will adjust the output of the panel, but so will the Output pot. I can have the "squish" all the way up, but if I back off the output the El Panel will dim. I am also not seeing compression of the signal, but I do see a change when engaging the Comp/Limit switch.

I don't think the gain pot should not affect the EL panel at all.

If you aren't seeing compression, be sure the EL panel / cells are enclosed from room light! This thing doesn't work if you can see the EL panel lighting up.

Quote
Do the EL Panels have to light up green???? I found blue but I want to be sure before I pull the trigger
The cells should react to blue as well, I don't know how the EL panel you have will behave though.
Here's a source from a groupdiy'r if you don't know of it:
https://sites.google.com/site/diypartsstore/catalog/new-t4b-opto-el-panels



Re: LA3A 500 BUILD
« Reply #503 on: April 22, 2015, 09:55:16 PM »
Quote

I don't think the gain pot should not affect the EL panel at all.

@dmp

That's a double negative, hopefully you mean that the gain pot should not affect the EL panel?  Thanks for replying. .. I will look into it more.

dmp

Re: LA3A 500 BUILD
« Reply #504 on: April 23, 2015, 09:31:34 AM »
Oops- that is not how I meant to write that.
The gain pot is after the gain reduction, so it should not affect the EL panel.

Re: LA3A 500 BUILD
« Reply #505 on: September 16, 2015, 12:55:41 AM »
hey all did any one else have issues will the comp/limit switch not making any difference and also did you find that the input gain seemed low so you didn't get much compression like only 5db  on max squash??
thanks
dave

Hummingwire

Re: LA3A 500 BUILD
« Reply #506 on: May 13, 2019, 10:48:51 AM »
Any chance this project will get some new life blown into it again?
I'd love to build one of these  ;D

Rob Flinn

Re: LA3A 500 BUILD
« Reply #507 on: May 13, 2019, 12:15:55 PM »
Any chance this project will get some new life blown into it again?
I'd love to build one of these  ;D

Not likely from LAZpro.  Peter disappeared off the radar a few years ago.    The last contact I had with hm was a few beers in London about 6 years ago.
regards Rob

Hummingwire

Re: LA3A 500 BUILD
« Reply #508 on: May 13, 2019, 04:00:06 PM »
Not likely from LAZpro.  Peter disappeared off the radar a few years ago.    The last contact I had with hm was a few beers in London about 6 years ago.

Too bad, I hope he's ok  :)

Can you (or anyone) recommend another DIY opto comp on here? I tried searching but this was the only one I found.

Fuzz Face

Re: LA3A 500 BUILD
« Reply #509 on: May 14, 2019, 09:55:29 AM »
Too bad, I hope he's ok  :)

Can you (or anyone) recommend another DIY opto comp on here? I tried searching but this was the only one I found.
DIYRE has an optical compressor kit

https://www.diyrecordingequipment.com/products/ola5-opto-compressor-kit


Serpent Audio has some LA3A boards
https://serpentaudio.com/product/sa-3a-pcb-blank/


 

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