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Brewery / Re: Brexit
« Last post by tands on Today at 01:48:59 PM »
What do you guys think will be the outcome of the French election? All the polls were saying Clinton was going to win over here, so I'm not all that convinced by them this time. Were the polls saying Remain would win, too?
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Drawing Board / Re: GME-20 Melcor EQ
« Last post by RSRecords on Today at 01:26:41 PM »
Yea, that's what I thought. My idea was to install an amp without the transformer and try and wire it as a differential line input. This would be inplace of using a line input transformer to "un-balance" the signal.  It be kinda cool to be self contained but I haven't studied the schematic to see how exactly it could or could not work. I could forego creating any new holes in the escutcheon.
Maybe somebody more familiar with these and AE-20 might have some insight.
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Drawing Board / Re: GME-20 Melcor EQ
« Last post by mjrippe on Today at 12:06:08 PM »
Yes, there are holes for the additional opamp and input transformer to make it into an AE-20, but the escutcheon would need holes for the gain switches  ;)
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help...
Remove the pre from the rack and measure DCR between gold fingers 8 and 10. Do this in mic mode with all other pushbutton switches out. Next do the same with the phantom switch engaged.
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Drawing Board / Re: GME-20 Melcor EQ
« Last post by RSRecords on Today at 11:46:25 AM »
Sweet! "musical  'A'"

It's officially. All front panels will hence forth be referred to as "escutcheon".

that's good to know.  So any opinion on the edcor options above? I picked up a couple 2623 for the output.

 I was also thinking of doing a diff. input for unbalancing. There's even a spot in the module for another opamp. I assume that was for the AE-20 with a mic preamp but it seems like it could be re configured by cutting a couple traces. Not sure if it's a good Idea to do that to a vintage pcb though.

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Drawing Board / Re: 4301p compressor question...
« Last post by JAY X on Today at 11:37:54 AM »
Hi Iprovlek!

Ok!. I corrected the layout...Pin6 stereo link!!

Quote
All CW are PIN 3 on potentiometer so that mean that every GND is PIN 3 on potentiometer!!!

On Treshold, Compression on Gain 3 PIN is marked with DOT....

let's see... Pin3  viewing the pot from the front...right?  so left pin 1 is  INPUT,  middle Pin2 is output and righ pin 3 is GND. ┬┐right?... ???



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The Lab / Re: SSL 9k Balancing Boards
« Last post by Majestic12 on Today at 11:34:04 AM »

It's a pair of SL542 EQ's - I bought them used from someone that had racked them, but I realized they never balanced them.

It's a shame this guy has discontinued the balanced output boards though...they're a neat solution.

Well, my balancing boards could be the easierst solution for your EQs. Just put them in the empty sockets and add two missing Jfets and you have perfectly balanced in and outputs.
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Thanks for the nice words, user: Foots (ha!!)

I spotted a discrepancy in the Gambaholic Rev 1&2 '68 Urei layout vs the '68 scheme and the original recpro layout.

R35 (220k screen grid2) is connecting to the filter cap instead of to pin 6 directly.

I'm wondering if it is addressed in the "all things" thread?  I haven't gotten that far yet!  I am somewhere on like page 50  :o


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The Lab / Re: SSL 9k Balancing Boards
« Last post by Siegfried Meier on Today at 11:22:56 AM »
Well, I'll use these for output, and I just bought a couple of these for input:

https://www.diyrecordingequipment.com/products/balanced-input

It's a pair of SL542 EQ's - I bought them used from someone that had racked them, but I realized they never balanced them.

It's a shame this guy has discontinued the balanced output boards though...they're a neat solution.
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