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E&MM Drum synthesizer
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zeitghost



Joined: Mar 11, 2014
Posts: 4
Location: swansea

PostPosted: Tue Mar 11, 2014 6:24 am    Post subject: E&MM Drum synthesizer
Subject description: Looking for a circuit diagram
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Apologies if this isn't the place to post this.

A colleague has a fairly ancient drum synth that he built decades ago from a design from (he thinks) E&MM.

It has a pcb which looks to me like it was made by Maplin, with the code GA60Q.

Would anyone know if this is indeed from E&MM, & if so, where might one find a schematic for it?

All the googling in the world hasn't produced much in the way of info, I'm afraid.

It has a Texas SN76477 ic, 3 x 4071, 1 x 4016, 6 x 741, and 3 x MC3340.
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bubzy



Joined: Oct 27, 2010
Posts: 594
Location: United Kingdom
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PostPosted: Wed Mar 12, 2014 12:49 am    Post subject: Reply with quote  Mark this post and the followings unread

http://experimentalistsanonymous.com/diy/Schematics/Full%20Synths%20Drum%20Synths%20and%20Misc%20Synth/

theres some e&mm drum stuff under syntom.

hard to say exactly, you might be lucky and find someone who knows the module you were talking about. you could of course, trace the pcb and make your own schematic Smile

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zeitghost



Joined: Mar 11, 2014
Posts: 4
Location: swansea

PostPosted: Wed Mar 12, 2014 2:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Very Happy Thanks for the reply!

I don't think I'm really motivated enough for the track tracing option.

But I'll bear it in mind.

Very Happy
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magman



Joined: Feb 04, 2009
Posts: 363
Location: Liverpool, UK

PostPosted: Thu Mar 13, 2014 4:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Zeitghost,

I've got a full set of E&MM. I should be able to have dig through them this weekend to see if I can find the project you are looking for.

I'll get back to you soon hopefully.

Regards

Magman
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zeitghost



Joined: Mar 11, 2014
Posts: 4
Location: swansea

PostPosted: Fri Mar 14, 2014 2:45 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks a lot.

If I didn't have the hardware in front of me, I'd have thought this project was totally imaginary by now. Very Happy
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magman



Joined: Feb 04, 2009
Posts: 363
Location: Liverpool, UK

PostPosted: Fri Mar 14, 2014 7:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Found them. It's a series of 5 articles in E&MM (as you had already surmised), from November 1981 to July 1982.

It will probably be early next week before I can get round to scanning them, but they are my stack now - so I'll get to them sooner or later. Can you drop me a PM with your email address, so that I can send the scans when they are ready?

All the best

Magman
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zeitghost



Joined: Mar 11, 2014
Posts: 4
Location: swansea

PostPosted: Mon Mar 17, 2014 2:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Very Happy

So it's not a fantasy after all.

Many thanks for your time.

Very Happy

My colleague will be pleased.
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new voodoo



Joined: May 06, 2013
Posts: 94
Location: RVA USA

PostPosted: Thu Mar 20, 2014 8:25 am    Post subject: Reply with quote  Mark this post and the followings unread

magman wrote:
Found them. It's a series of 5 articles in E&MM (as you had already surmised), from November 1981 to July 1982.

It will probably be early next week before I can get round to scanning them, n


Could you post them here as well or PM me too?
ive got some sn74677's that im shopping for a project to use them in,

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strategy



Joined: Jan 03, 2009
Posts: 87
Location: portland, oregon

PostPosted: Wed Apr 16, 2014 9:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

There are some scans from these issues floating around online, i've downloaded a few - but the quality is really terrible, like tiny jpgs of torn magazine pages...impossible to read the text & layouts. If you get new versions up, you'll be a drum synth hero!

I've always been really curious about these projects, many of them similar to Coron DS7, DS8 and Synare circuits, like strange cousins

Strategy

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