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Broadwave
Joined: Feb 16, 2007 Posts: 347 Location: Manchester UK
Audio files: 6
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Posted: Mon Mar 24, 2014 2:25 am Post subject:
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Kipling wrote: |
The original front panel design shows an arrow between the two sockets suggesting that they are perhaps linked by the switched contacts of one or both sockets so it feeds back into the external vibrato input if no plugs are inserted in either socket. The service manual does not show any connection between the two on the schematic nor mention it in the text. It's a simple job to connect them if required.
I also presume the Lower Voice Output (CV) goes via the lead to the 2600/TTSH as the main CV output, and the Upper Voice Output goes to both Upper Voice Output sockets on the front panel.
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Hi Kipling… Correct on both accounts. The delayed vibrato output goes to the 3.5 socket switch side, and the external vibrato goes back to the CV mix, that will disconnect the delayed vibrato when using an external modulation input.
The upper voice is a separate socket on the panel, and the lower voice is outputted along with Gate & Trigger (and of course the +/-/0v supply), via a 6 core cable to the main console. |
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Kipling
Joined: Jan 12, 2014 Posts: 20 Location: England
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Posted: Mon Mar 24, 2014 10:32 am Post subject:
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AndyR1960 wrote: |
Hi Kipling… Correct on both accounts. The delayed vibrato output goes to the 3.5 socket switch side, and the external vibrato goes back to the CV mix, that will disconnect the delayed vibrato when using an external modulation input.
The upper voice is a separate socket on the panel, and the lower voice is outputted along with Gate & Trigger (and of course the +/-/0v supply), via a 6 core cable to the main console. |
Thanks for the prompt response Andy - a great help. |
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skanker
Joined: Apr 24, 2014 Posts: 4 Location: Manchester
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Posted: Thu Apr 24, 2014 8:52 am Post subject:
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Hi Andy.
Very impressed with your build. it looks fantastic.
Im very interested in the keyboard you've made as my 2600 is crying out for one as well as a new case as mine a little tatty.
Can you tell me where you got the materials for your case build please?
Cheers! |
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mosc
Site Admin
Joined: Jan 31, 2003 Posts: 18197 Location: Durham, NC
Audio files: 212
G2 patch files: 60
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Posted: Thu Apr 24, 2014 12:05 pm Post subject:
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I just came across this thread.
What a beautiful project. Your craftsmanship is splendid. Bravo!
I used to have a 2600 in the '70s. Yours is a dead ringer for sure.
_________________ --Howard
my music and other stuff |
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isak
Joined: Dec 13, 2009 Posts: 847 Location: Israel
Audio files: 18
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Posted: Fri Apr 25, 2014 3:42 am Post subject:
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skanker wrote: | Hi Andy.
Very impressed with your build. it looks fantastic.
Im very interested in the keyboard you've made as my 2600 is crying out for one as well as a new case as mine a little tatty.
Can you tell me where you got the materials for your case build please?
Cheers! |
Hi there
If you read the first page you'll find the info about the faceplate and the cabinet.
Cheers,
Isak E. _________________ http://www.myspace.com/mgmtrance |
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skanker
Joined: Apr 24, 2014 Posts: 4 Location: Manchester
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Posted: Fri Apr 25, 2014 3:53 am Post subject:
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Hi.
I've read the whole thread and theres no mention of where he got the tolex or metal case fittings from? |
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isak
Joined: Dec 13, 2009 Posts: 847 Location: Israel
Audio files: 18
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Posted: Fri Apr 25, 2014 4:28 am Post subject:
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AndyR1960 wrote: | I did all the panel graphics in Adobe Illustrator - 3 layers:
1. Laser cuts
2. Orange graphics
3. White graphics
I had the panel Laser Cut in 1.5mm Mild Steel, by Cutting Technologies in Barnsley, UK (£120.00). Then it was powder coated in satin black by Ashton Powder Coating, Manchester (£35.00), and finally a two colour screen print by MRT in Stockport (£145.00).
MDF was cut at B&Q (£28.00), Tolex, glue and case hardware came in at £53.00
So, the cabinet and panel alone came in at a total of £381.00
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How about that _________________ http://www.myspace.com/mgmtrance |
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skanker
Joined: Apr 24, 2014 Posts: 4 Location: Manchester
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Posted: Fri Apr 25, 2014 5:10 am Post subject:
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Hi & thanks but as i said, I've read the thread through and theres no mention of where to buy the Tolex or the metal case fittings.
Not sure if you have B&Q in Israel but they do not sell Tolex |
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Broadwave
Joined: Feb 16, 2007 Posts: 347 Location: Manchester UK
Audio files: 6
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skanker
Joined: Apr 24, 2014 Posts: 4 Location: Manchester
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Posted: Fri Apr 25, 2014 7:24 am Post subject:
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Hi Andy, Thats great.
Many thanks for the heads up mate. Hopefully i can get mine looking just as good very soon! |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Fri Apr 25, 2014 11:14 am Post subject:
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I'd stay away from hide glue, Andy. It's a right mess.
Maybe white wood glue like titebond? You'd need to compress it while drying though. |
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Broadwave
Joined: Feb 16, 2007 Posts: 347 Location: Manchester UK
Audio files: 6
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Posted: Fri Apr 25, 2014 2:49 pm Post subject:
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LFLab wrote: | I'd stay away from hide glue, Andy. It's a right mess.
Maybe white wood glue like titebond? You'd need to compress it while drying though. |
Thanks for the tip... I'll try the Titebond |
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diablojoy
Joined: Sep 07, 2008 Posts: 809 Location: melbourne australia
Audio files: 11
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Posted: Sat Apr 26, 2014 1:17 am Post subject:
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hmm a sprayable contact should be the best if used correctly
sprayed on both surfaces and allowed to dry till only slightly tacky before pressing together , of course you only get one go at it that way, no second chances !
titebond would be my second choice, hide glue probably not so great
but easily re- glues with some heat. _________________ In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any |
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Kipling
Joined: Jan 12, 2014 Posts: 20 Location: England
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Posted: Thu Jun 26, 2014 12:59 pm Post subject:
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Well after ages of PCB tweaking and panel making (by hand apart from the slider slots which I used a router for), not to mention many hours wiring up the very fiddly Kimber Allen keyboard contacts with resulting burnt finger tips, I've finally finished the 3620 clone PCB, lead, panel and keybed, All I need to do now is build and tolex the case for it, and have done the CAD drawings in preparation.
Oh, and finish building the TTSH which has taken a back seat while I build the 3620, so I can plug it in and test/calibrate it.....
It is built to the original ARP circuit (right down to IMF3958 dual J-FETs) and 2N4392 replacements for two of the 2N5459s as per factory change note, on a single PCB to which everything is mounted apart from three sockets. I managed to get some 0.47uF polycarbonate capacitors (Philips MKC344 series) from an ebay member in Poland so hopefully S/H will work fine. I made the PCB compatible with those and the polystyrene brick capacitors I already had from Rush Online.
If I were to start again, I'd get all the ceramic capacitor lead spacing correct (did all of them as 7.5mm instead of 5mm) and the Bourns trimmers which I wrongly thought were on a 0.2 x 0.2" grid. They're 0.2 x 0.1" but thankfully the wiper lead is long enough to bend to reach the pad.
If it all works, and if anyone were interested, I have three spare PCBs so would be open to sensible offers for them (circa £30 each plus postage), and can supply CAD files for the panel, screen printing and case.
Thanks to those who've offered help in getting this far, especially AndyR1960, without whom I'd probably not have started the project.
Will post pics of the finished article ASAP.
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diablojoy
Joined: Sep 07, 2008 Posts: 809 Location: melbourne australia
Audio files: 11
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Posted: Fri Jun 27, 2014 2:04 am Post subject:
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orsm work
Oh and hell yeah, really interested in getting one of those boards
I did get my keyboard temporarily going with one of ray wilsons
single buss keyboard circuits as I had it lying around so my TTSH is running for the moment with that , but this would be so much better.
my case is done but I allowed space for another panel for keyboard controls, a sequencer plus a bit more ( actually it's almost the same size again as the TTSH panel )
just let me know how much you want for one including postage to OZ.
Is paypal ok ?
cheers _________________ In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any |
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Kipling
Joined: Jan 12, 2014 Posts: 20 Location: England
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Posted: Fri Jun 27, 2014 10:39 am Post subject:
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diablojoy wrote: | orsm work
Oh and hell yeah, really interested in getting one of those boards
I did get my keyboard temporarily going with one of ray wilsons
single buss keyboard circuits as I had it lying around so my TTSH is running for the moment with that , but this would be so much better.
my case is done but I allowed space for another panel for keyboard controls, a sequencer plus a bit more ( actually it's almost the same size again as the TTSH panel )
just let me know how much you want for one including postage to OZ.
Is paypal ok ?
cheers |
Thank you kindly.
I'll check out the postage costs and get back to you in due course, but I really want to be able to test it successfully first for your peace of mind.
My panel design is 170(W) x 230mm(H) - 5mm all round larger than the PCB. I had to guesstimate the original panel size from the original PCB dimensions, and mine might actually be a little larger than the original.
It has to be said if you can pick up a genuine 3620 for less than £500 GBP then you'd be better off with that as this is not a cheap project - the keybed alone cost me £360. Obviously if you can lay your hands on a good 2-contact/key keybed for a song then it makes it worthwhile, plus the enormous satisfaction of doing it yourself.
The IMF3958s came in at £19 GBP each (and I hope they're genuine - they test OK) but 2N3958s should also work fine (not quite so rare or expensive but still not cheap) and I recall AndyR saying he used two 2n5459s instead for each. I used 0.1% 100R precision resistors for the keyboard but you could probably get away with 0.5 or 1% without any noticeable difference. |
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diablojoy
Joined: Sep 07, 2008 Posts: 809 Location: melbourne australia
Audio files: 11
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Posted: Fri Jun 27, 2014 11:30 pm Post subject:
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Quote: | It has to be said if you can pick up a genuine 3620 for less than £500 GBP then you'd be better off with that as this is not a cheap project |
That would be cheating
No seriously I just prefer DIY
keybed shouldn't be too big an issue I believe I have a workable solution to add a second buss to the existing one
I have mostly everything else including the polystyrene (bricks )
very apt description _________________ In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any |
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patroche
Joined: Feb 26, 2012 Posts: 16 Location: montelimar
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Posted: Sat Jun 28, 2014 12:17 am Post subject:
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2n3958 - 2N3958s are same than IMF3958s
You can purchase its on ebay china , they run ! _________________ http://www.crazy-patroche.com/ |
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Kipling
Joined: Jan 12, 2014 Posts: 20 Location: England
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Posted: Sat Jun 28, 2014 1:07 am Post subject:
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I bought two 2N3958s from a supplier on ebay from south east Asia months ago and when I eventually got round to opening the package (well beyond the return period) there was something entirely different in there - not even transistors!
Lesson learned. |
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patroche
Joined: Feb 26, 2012 Posts: 16 Location: montelimar
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Tue Nov 11, 2014 8:02 am Post subject:
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LOL! that's one way way of adding speakers to a 2600 clone
Great idea! |
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patroche
Joined: Feb 26, 2012 Posts: 16 Location: montelimar
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Solar1
Joined: Mar 25, 2007 Posts: 14 Location: Michigan
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Posted: Wed Jul 22, 2015 5:47 pm Post subject:
ARP 2600 clone PDF |
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Quote:
"I may put a PDF together with complete details and PCB foils for all the "carrier" boards and 40 series modules (along with corrections to the ARP service manual - quite a few mistakes there!)"
Hello Andy, Did you ever put together that PDF you refered to?
If so, Is it something you will be sharing? I am interested, especially in the panel file and service note revisions
Thanks,
Solar1 |
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Broadwave
Joined: Feb 16, 2007 Posts: 347 Location: Manchester UK
Audio files: 6
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Posted: Sun Jul 26, 2015 10:45 pm Post subject:
Re: ARP 2600 clone PDF |
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Solar1 wrote: |
Hello Andy, Did you ever put together that PDF you refered to?
If so, Is it something you will be sharing? I am interested, especially in the panel file and service note revisions
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Hi Solar1, No I'm afraid I didn't manage to get the docs together. Patroche (see his signature link just above your post) did a much better job - All the PCB's, layouts etc. are on his web page _________________ Kronos 2-88, Kronos 61, Studiologic Sledge V2/SL, Broadwave ARP 2600EX, Broadwave 18U ARP based Eurorack Modular, Broadwave Minimoog Clone, GEM S2 Turbo.
Synth DIY Projects
Musical Doodlings |
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Solar1
Joined: Mar 25, 2007 Posts: 14 Location: Michigan
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Posted: Mon Jul 27, 2015 1:23 pm Post subject:
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Thanks Andy, I appreciate the heads up. One question though, How do I translate the web page to English?
Added: just figured out how to translate...what can I say, I'm an analog guy living in a digital world"!. |
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