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Rehoused Polymoog Resonator

Posted: Sun Jul 29, 2012 4:53 pm
by HideawayStudio
I've spent the last three days rehousing and wiring up an original Formant Resonator pcb rescued from a scrapped Polymoog. This has been done before but I decided to go a few extra miles and rescue the 8 preset formant filters as well as the triple resonator.

This involved building a suitable power supply to generate +15V, -15V and 5V DC and something to drive the 3 to 8 decoder to select the fixed formant modes. I followed the belt and braces route in the end and built up a wafer switch that counted in binary from 0 to 7!

I cut down the remains of the front panel leaving just the resonator controls and built a wooden box to house it and the pcb. I then built the power supply into the rear of the cabinet.

The output of the fixed formant circuits was not buffered so I retasked one of the now unused op amps to act as an output buffer. The two sections are being fed with the same output but end up on different outputs. I fitted a bypass switch and the 8 way fixed formant mode switch to the rear panel.

After three days of toil I powered it up and it didn't do anything useful... just lots of put put put put put noises...

Then I discovered that a wire had fallen off one of the front panel sliders and hey presto the whole thing jumped into action....

Even the fixed formants worked... well 7 of them... one of them was making perculiar noises and I suspect I ended up fixing a fault that the Polymoog had before it was scrapped! One replacement op amp later and 100% functionality.

There is some noise I need to tackle - mainly due to cable routing.

Here is a quick demo:

Firstly a drone sound made whilst moving the front panel controls fed from a JUNO-106. Then some strings from the SY77.... which are turned into a choir by the resonator! Then a brass patch on the Minimoog made a little more brass like, then a nylon guitar made with the Minimoog and the resonator, then a series of formants using a JUNO-106 as the source.

Download Here:
http://www.sendspace.com/file/usxcdn

Image

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It needs a little more experimentation but definitely an interesting piece of kit.

Re: Rehoused Polymoog Resonator

Posted: Sun Jul 29, 2012 5:38 pm
by adhmzaiusz
TOTAL AWESOMENESS!!!
Outstanding job!

Re: Rehoused Polymoog Resonator

Posted: Sun Jul 29, 2012 7:38 pm
by Bitexion
Lovely stuff, that resonator sure is sweeter than my Smallstone Phaser.

I find it IMPOSSIBLE to not strike some Jarre chords whenever I play strings through a phaser/resonator.

Re: Rehoused Polymoog Resonator

Posted: Sun Jul 29, 2012 8:59 pm
by sam
Nice one.. :D

Re: Rehoused Polymoog Resonator

Posted: Sun Jul 29, 2012 9:09 pm
by dubold
oh great, another thing I didn't know i needed.

joking aside, that's incredible, great work rescuing the resonator.

Re: Rehoused Polymoog Resonator

Posted: Sun Jul 29, 2012 10:12 pm
by Bitexion
Dubold, at least you can comfort yourself with the fact that you can't get a thing like this. So you don't need to GAS over it, really.

Re: Rehoused Polymoog Resonator

Posted: Mon Jul 30, 2012 5:22 am
by Carey M
So, what would be a nice analogue alternative to the Polymoog resonator? MAM RS3 any good for shaping the source like this?

Because that was awesome.

- CM

Re: Rehoused Polymoog Resonator

Posted: Mon Jul 30, 2012 10:17 am
by pflosi
Awesome work as usual Dan, very impressive! Keep up the nice work.

Re: Rehoused Polymoog Resonator

Posted: Mon Jul 30, 2012 5:16 pm
by dubold
Bitexion wrote:Dubold, at least you can comfort yourself with the fact that you can't get a thing like this. So you don't need to GAS over it, really.
I think that might be making it worse, actually!

Re: Rehoused Polymoog Resonator

Posted: Mon Jul 30, 2012 7:43 pm
by Bitexion
I know what you mean, I had to take a few years rest from this forum because it made me buy so fricking much gear. Couldn't stuff it all into my apartment.

Now I have a couple synths sitting in a closet, a couple in the basement, one on the livingroom table, and 3 on a stand next to a wall. Plus a modular system next to my PC.

Re: Rehoused Polymoog Resonator

Posted: Mon Jul 30, 2012 7:48 pm
by rhino
Awesome!! If I am ever so lucky as to own a PolyMoog, I'll hire you to make a new cabinet for it.

Re: Rehoused Polymoog Resonator

Posted: Mon Jul 30, 2012 10:06 pm
by HideawayStudio
This thing is already becoming quite addictive in the same way my Minimoog is turning out.

Actually the two together make for an interesting combo.

It's very effective on all sorts of material but I really must clean those 35 year old sliders!!

Another quick demo - complete with genuine crackles :roll:
http://www.sendspace.com/file/3z94b1

It was made with the Blofeld (patch D058 Mantovani) feeding the resonator - It kind of reminds me
of my Novachord 8-)

Re: Rehoused Polymoog Resonator

Posted: Wed Aug 01, 2012 8:22 am
by Analogic Synths
hi Dan,
i am really impressed with the work you have done. probably the nicest stand-alone resonator in the world.

and it's another testimony of what a great machine the Polymoog is. in this way, parting one out still makes sense.

i am sorry about the sliders, and i'm afraid it's the same old 'Moog synth that outlives its foam'-syndrome. As found on the Rogue, Opus3, Liberation and what have you.
But if i look at what you have made of it, in just a few days, cleaning the sliders will be a piece of cake.

Enjoy!

Re: Rehoused Polymoog Resonator

Posted: Wed Aug 01, 2012 9:18 pm
by HideawayStudio
Thanks Leo - and a big thank you for finding the raw materials to make it possible in the first place.

A big thank you must also go to Ken Elhardt who inspired me to do this project after I saw his superb demo on YouTube of his rehoused resonator:



It's worth pointing out to all that may be thinking we collectively destroyed a Polymoog in the process of making this resonator that she was simply too far gone and has been a great source of parts for other's treasured beasts.

Re: Rehoused Polymoog Resonator

Posted: Thu Aug 02, 2012 6:11 pm
by Cybercardinal
OMG...nice one. That is so sweet sounding

I really must continue repairing my Polymoog. (Well, it's soon winter :) )