pucho812

emt 140RK schematic request.
« on: March 09, 2020, 12:52:03 PM »
Anyone have legible schematic of the remote control unit for an EMT 140.  I have found some on the web but they are hard to read...

You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


fazer

Re: emt 140RK schematic request.
« Reply #1 on: March 09, 2020, 01:31:54 PM »
Is this it?

pucho812

Re: emt 140RK schematic request.
« Reply #2 on: March 09, 2020, 03:12:55 PM »
Yes that is the one... thank you. Hard to read some values. What is the meter value on that?

Basically we found in the studio storage the motors  for remote control. We have everything, they just plug in and play but we do not have the remote unit, where the 5 pin xlr connects so I am building one.

I can see the momentary switches and the 2 X 200Ω resistors along side the .1uF capacitors.  but am I reading the meter value correctly 311.5uA or is it 377.5uA? I may just skip the meter on it as we adjust them by ear but would be pretty cool to have it just to look at it.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

fazer

Re: emt 140RK schematic request.
« Reply #3 on: March 09, 2020, 04:50:24 PM »
Meter is 377.5 uA

pucho812

Re: emt 140RK schematic request.
« Reply #4 on: March 09, 2020, 05:50:29 PM »
Meter is 377.5 uA

cool thanks...  that is an odd number but will get us where we need to go. now the follow up AC or DC?
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

fazer

Re: emt 140RK schematic request.
« Reply #5 on: March 09, 2020, 08:05:40 PM »
Ac dc? 

I don’t know for sure but just looking at the circuit I would say DC.   I don’t have the remote .   I installed one Back in the 80s. That studio is long gone.   

pucho812

Re: emt 140RK schematic request.
« Reply #6 on: March 10, 2020, 12:16:48 AM »
Ac dc? 

I don’t know for sure but just looking at the circuit I would say DC.   I don’t have the remote .   I installed one Back in the 80s. That studio is long gone.

yes I thought DC too  but I'll test it and find out. thanks.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

jensenmann

Re: emt 140RK schematic request.
« Reply #7 on: March 10, 2020, 05:03:30 AM »
It´s DC
Jens
Quote from: PRR
The tubes of course don't care what frequency they distort

Rob Flinn

Re: emt 140RK schematic request.
« Reply #8 on: March 10, 2020, 06:39:03 AM »
The original meters sit up at 1 second when they are switched off.  See attached pic
regards Rob

pucho812

Re: emt 140RK schematic request.
« Reply #9 on: March 10, 2020, 01:15:13 PM »
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


pucho812

Re: emt 140RK schematic request.
« Reply #10 on: March 10, 2020, 01:16:36 PM »
The original meters sit up at 1 second when they are switched off.  See attached pic

 cool, thanks for the heads up.   originally was asked to skip meters altogether, but no way, I want meters.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

jensenmann

Re: emt 140RK schematic request.
« Reply #11 on: March 10, 2020, 01:28:49 PM »
I have an original meter/remote right here on the bench. If you want to know any specifics then let me know.
Jens
Quote from: PRR
The tubes of course don't care what frequency they distort

Rob Flinn

Re: emt 140RK schematic request.
« Reply #12 on: March 10, 2020, 01:35:01 PM »
I have a rempote here that someone gave me that has been made using a standard generic meter.    It's not massively complex, I could probably reverse engineer it if it's a help ?
regards Rob

pucho812

Re: emt 140RK schematic request.
« Reply #13 on: March 10, 2020, 11:33:49 PM »
I plan just a standard dc uA meter.  We adjust by ear anyway, meter is jus to look pretty 😎
« Last Edit: March 11, 2020, 02:27:02 PM by pucho812 »
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

pucho812

Re: emt 140RK schematic request.
« Reply #14 on: March 14, 2020, 07:38:27 PM »
Was at the local surplus place today and found these beauties. They max at 500uA dc which will fits the meter descriptions in the schematic . Picked up other parts too, caps, resistors and switches.  The game plan is a dpdt  momentary toggle switch and one side wired for increase in reverb time and one side decrease in reverb time.   
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

mjrippe

Re: emt 140RK schematic request.
« Reply #15 on: March 14, 2020, 09:50:12 PM »
Oooooh, I have some bi-directional leaf switches that I want to send you for this if you can make a square cut-out for the toggle.  They would look so good.  Like the talkback switch on our Neve 5316. 

And I have dozens of them if anyone else would like some  :)
« Last Edit: March 15, 2020, 12:54:30 PM by mjrippe »

pucho812

Re: emt 140RK schematic request.
« Reply #16 on: March 15, 2020, 05:55:13 PM »
thanks but we got some nice big ass toggle switches. the meters for whatever reason have a red line marker between 300-400uA,  complete fluke that we can use to our advantage....
keep your leaf switches, I am sure someone else will have need for them but very generous to offer.  I owe you a pint or abewverage of your choice next time I am in NYC
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


 

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