Re: [vintagesynthrepair] AM radios
2012-12-21 by Electronic Battle
... I did this sort of thing in 1977/78 ... firstly a Commodore scientific LED calculator, and then a TI-58 programmable LED display calculator, which I used
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Re: [vintagesynthrepair] AM radios
2012-12-21 by 65 Lotus
Same here. From: MiKelleY To: vintagesynthrepair@yahoogroups.com Sent: Friday, December 21, 2012 11:23 AM Subject: Re: [vintagesynthrepair] AM radios I have
Re: [vintagesynthrepair] AM radios
2012-12-21 by MiKelleY
I have always wondered about the audio results achieved from doing this. If you ever post an mp3 or wav from your older tapes, I would love to hear them.
Re: Roland JX3P Faulty
2012-12-21 by Nick
I think the switching matrix goes straight to the IC-1 cpu.
Re: Roland JX3P Faulty
2012-12-21 by Nick
Thanks for the advice. The seller added that now no preset/bank buttons work at all after he tested it again.
AM radios
2012-12-21 by ChristopherG
... Interesting article! That was one of the ways I used to make electronic sounds in the late 70s/ early 80s before I got my first synthesizer-- just by
Re: [vintagesynthrepair] RadioShack - Cat No. 65-1228
2012-12-21 by MiKelleY
Maybe off subject a bit, but I found this old SYNAPSE mag article a few years back, about using a Novus Mathematician to create electronic music through an AM
Re: [vintagesynthrepair] RadioShack - Cat No. 65-1228
2012-12-20 by boris dumery
Hi DonW You can try with mister pat ALLBRIGHT from Radio Shack at pat.albright@radioshack.com He helped me to fix a lot of problems to to get schematics,
RadioShack - Cat No. 65-1228
2012-12-20 by Doneley Watson
This is a little calculator/calender/ etc. It is made of transparent golden plastic about 1 1/2 by 2 1/2 by 7/16 inches. There is a 1 1/2 by 1 1/4 inch
Re: Roland JX3P Faulty
2012-12-20 by Grant B
Probably crack on the board. Fixed lots of those, not too hard at all if you have a meter and some free time. Also could be a logic chip, should not be hard to
Re: [vintagesynthrepair] Re: Roland JX3P Faulty
2012-12-20 by Jez
I d test it properly first before buying just to make sure it s not got anything else wrong with it - the bank switching issue may just be all the seller has
Re: Roland JX3P Faulty
2012-12-20 by Nick
Oh, I will just add that apart from the aforementioned faults, the rest of the synth works fine - keyboard, audio etc. Thanks
Roland JX3P Faulty
2012-12-20 by Nick
Hello all, Im a newb here and have re-ignited my long since dormant love of synths & electronics, so finding this group is great! Id like to buy a faulty JX3P
Re: [vintagesynthrepair] Arp challenge.
2012-12-20 by Jim Blair
Thanks again, this is very helpful. I have a couple of projects to hit before the ProDGX (M3 output jack to Leslie, noisy Yamaha E30, dead Arp Quartet, broken
Re: [vintagesynthrepair] Arp challenge.
2012-12-20 by Malte Rogacki
The ARP Pro Soloist oscillator control continued: When looking at the schematic it becomes clear that the octave switching is actually happening in two places:
Re: [vintagesynthrepair] Arp challenge.
2012-12-19 by Jim Blair
Very interesting. I will experiment based on this, and report my results. Thanks
RE: [vintagesynthrepair] Re: Arp challenge.
2012-12-19 by Lorne Hammond
Jim The Optigan was Rick May s. I tweaked two minimoogs for him (sold, he regrets that now) one had an elegant LA mod that put an adsr to pitch osc 3. Done
Re: [vintagesynthrepair] Arp challenge.
2012-12-18 by Malte Rogacki
So here are a few more informations about the CV generation in the ARP Pro Soloist and Pro DGX; this is coming from the service manual (theoretically I could
RE: [vintagesynthrepair] Re: Arp challenge.
2012-12-18 by Jim Blair
Man, small world. I ll bet the Optigan with full library was one of mine. I sold one with tons of disks. The doubletron black MkV and Bob s 400SM were
Re: [vintagesynthrepair] Arp challenge.
2012-12-18 by Malte Rogacki
OK, the ARP Pro Soloist and Pro DGX are very special beasts completely different from all other ARP models. Because they are digital. OK, partly. Yes, they
RE: [vintagesynthrepair] Re: Arp challenge.
2012-12-18 by Lorne Hammond
Optigan and two polymoogs here. Another Optigan was around that is ex-la with a full library. The tron I played was a gogo. Nanaimo s doubletron went to
RE: [vintagesynthrepair] Re: Arp challenge.
2012-12-18 by Lorne Hammond
Ah you re the Nakusp guy who has had some interesting things over the years, nice modern stuff coming out of labels up that way. I m in Victoria. There is a
Re: Arp challenge.
2012-12-18 by scituate_mass
Hi Jim, Sorry if I wasnt t clear. I meant the sample hold circuit responsible for remembering the note that you trigger until another note is played. Not an
Re: [vintagesynthrepair] Re: Arp challenge.
2012-12-18 by jammie
get a d550 compact as seeing you have so many boards to midi from theres a great pc editor with a virtual pg1000 controller i use it all the time as seeing
Re: Arp challenge.
2012-12-18 by dwv1957
Hi Jim, I used to live in Aldergrove, I now live in Nakusp. We met 10 or 12 years ago through a mutual friend, Larry Vollans I have been restoring old analog
RE: [vintagesynthrepair] Re: Arp challenge.
2012-12-18 by Jim Blair
Neat. There may be another residing here soon. And possibly a third, if I can source out the missing parts (without getting a second mortgage). I ve owned lots
RE: [vintagesynthrepair] Re: Arp challenge.
2012-12-18 by Lorne Hammond
Jim: I ve only seen one other mellotron, up island from Victoria. Lorne From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com]
Re: [vintagesynthrepair] Re: Arp challenge.
2012-12-17 by Jim Blair
Thanks Kevin, I d love to see your collection. Do you have photos online? Jim
Re: Arp challenge.
2012-12-17 by The Wizard
Totally awesome! Not only your collection of keyboards (mine range from the early 70 s with my ARP 2500 to the early 90 s), but that you re living in/on one of
Re: [vintagesynthrepair] Re: Arp challenge.
2012-12-17 by Jim Blair
Hey thanks Dave. And yes, I do live on Vancouver Island. I operate a small recording studio that specializes in vintage keyboards.
Re: Arp challenge.
2012-12-17 by dwv1957
Since all the other keys work, I would suspect the problem is the key it s self. Does the ProDGX use a resistor or diode keyboard? Either way, check for a bad
Re: [vintagesynthrepair] Re: Arp challenge.
2012-12-17 by Jim Blair
Thanks for your reply, DT. No sample and hold on the ProDGX. The note does not stay at the correct frequency when held. The pitch drop happens immediately on
Re: Arp challenge.
2012-12-17 by scituate_mass
Hi Jim, The fact that the rest of the keyboard works fine seems to rule out that the sample hold function is awry. Does the note stay at the correct frequency
Re: [vintagesynthrepair] Arp challenge.
2012-12-17 by Daniel Forró
Hi, Jim, I ve got also ProDGX, fortunately without problems. I can t help with your problem, so have just one question: do you have Service Documentation? This
Arp challenge.
2012-12-17 by Jim Blair
Hello! Here s an odd one up for discussion. I have a Arp ProDGX. Everything works fine....except.....if I hit the top key (highest note) it briefly plays the
Re: [vintagesynthrepair] K2600 cannot see expansion memory
2012-12-17 by Roger J
There was a guy on Maui(music store in Kahului) and another on Oahu. Try this first, on power up hit exit, cursor to diagnostics, then enter run all and move
K2600 cannot see expansion memory
2012-12-17 by kekaha_heather
All - I have a K2600x which has all the latest updates. Problem - when I purchased the thing, there was memory installed, but it could not be seen by the
Re: juno 60 strange note stealing problem
2012-12-15 by johndaly56
sorry the notes came out wrong for the melody, the spaces are missing. here is how it should go A,C,E,C G,C,E,C F,C,E,C each note is on the beat 1,2,3,4 in a
juno 60 strange note stealing problem
2012-12-15 by johndaly56
Hi everybody, I m hoping some of you can help me out here, trying to repair a Juno 60. whenever i switch the Juno on and play a 3 note melody with a long
Re: Don't know if the original caps were polar or bi-polar (E-II)
2012-12-15 by Gil
The board has the marking... not the non polar caps :/ It has the positive marks near each of the location where the non polar caps should go. This is what
Re: [vintagesynthrepair] Any DX7 gurus in the house?
2012-12-14 by Roger J
Mostly they loose their switching supply, often one of the caps(loop back) go down in value, causing the dirty or no DC voltages. Yamaha is having a service
Any DX7 gurus in the house?
2012-12-14 by Jim Blair
I have a sick DX7S, and am trying to bring it back to life. If there s some DX guys hanging around, I ll post the details. Thanks! Jim
Re: [vintagesynthrepair] Roland SH-7 sync problem
2012-12-13 by Peter Mörck
Never mind. This is apparently the way it works. Found a good explanation in AH archives. It has some sort of soft-like sync which only syncs VCO2 to multiples
Re: [vintagesynthrepair] Re: Kurzweil K2600; keys not triggering
2012-12-12 by Roger J
76 keys. If you just remove the bender/mod cheek blocks 4 screws(smaller with large washer) , lift and unplug after-touch cable. and then all of the screws
Re: Kurzweil K2600; keys not triggering
2012-12-12 by snowleopard
Yes, the 72 key model. Definitely no liquid, though I do live in a fairly humid part of the country. I am guessing it s just age. I ll crack it open and give
Re: Korg Trident MK2 strange behavior
2012-12-12 by alesisfusion8hd
Thanks Gil. I ve checked the service manual you posted to the group. Unfortunatelly, it s the same copy that I already have; the calibration procedure has been
RE: [vintagesynthrepair] Kurzweil K2600; keys not triggering
2012-12-12 by Brian
I ve repaired/replaced hundreds of these contact strips over the years. You can try cleaning them. Remove the rubber strips then clean the PCB and the
RE: [vintagesynthrepair] Kurzweil K2600; keys not triggering
2012-12-12 by Lorne Hammond
It sure sounds like new strips are the cure to me. lorne From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of
RE: [vintagesynthrepair] Kurzweil K2600; keys not triggering
2012-12-12 by Lorne Hammond
If its like the K2000 you will find a number of section of rubber bubbles with carbon inside that bridge two carbons on the pcb. There are a number of nubs or
Roland SH-7 sync problem
2012-12-11 by Peter Mörck
Hi, I m trying to troubleshoot my SH-7 with serial 670xxx (so looks like the first version). I haven t had it for a long time and the first thing I had to do