Search found 408 matches

by Dr. Phibes
Mon Sep 28, 2015 1:23 pm
Forum: General Synthesizers
Topic: Akai Analogue Polysynth: Timbre Wolf
Replies: 125
Views: 65713

Re: Akai Analogue Polysynth: Timbre Wolf

I think it sounds alright. I can see it being something you hook up to a load of effects pedals and muck around with.
by Dr. Phibes
Fri Aug 21, 2015 7:52 pm
Forum: General Synthesizers
Topic: Were analog computers the real ancestors of synthesizers?
Replies: 26
Views: 7666

Re: Were analog computers the real ancestors of synthesizers

^ I was reading about that a few days ago. Strange looking things when opened up.
by Dr. Phibes
Thu Aug 20, 2015 11:31 pm
Forum: General Synthesizers
Topic: CS-40M - Can't change sound
Replies: 6
Views: 1261

Re: CS-40M - Can't change sound

Which components?
by Dr. Phibes
Thu Aug 20, 2015 10:37 pm
Forum: HELP!
Topic: JUNO-6 PROBLEM!
Replies: 3
Views: 949

Re: JUNO-6 PROBLEM!

Check the trace and connector that link the switch to the CPU board for connectivity. A trace may be broken or the old molex connector is loose.
by Dr. Phibes
Mon Aug 17, 2015 5:20 pm
Forum: HELP!
Topic: jx-3p + not what to do when buying a jx-3p
Replies: 17
Views: 7665

Re: jx-3p + not what to do when buying a jx-3p

Save up for a mid-range desoldering station, seriously. Everything else will just be pain.
by Dr. Phibes
Thu Aug 13, 2015 4:18 am
Forum: Buyer's Guide
Topic: places to sell vintage synths (UK)
Replies: 5
Views: 5260

Re: places to sell vintage synths (UK)

Sound on Sound readers' adds. You need an account but it's free.
by Dr. Phibes
Mon Aug 10, 2015 10:40 pm
Forum: General Synthesizers
Topic: Buying under-priced vintage synths
Replies: 61
Views: 19338

Re: Buying under-priced vintage synths

I changed my mind. I'd hit him and then steal what I wanted.
by Dr. Phibes
Tue Aug 04, 2015 7:08 pm
Forum: HELP!
Topic: Crumar Performer String Section not working
Replies: 11
Views: 6721

Re: Crumar Performer String Section not working

The trilogy I'm fixing at the moment (uses lots of the same circuits) had a few dead op-amps that caused similar problems.
by Dr. Phibes
Tue Aug 04, 2015 3:29 pm
Forum: Gear Services & Other Goods
Topic: Found
Replies: 0
Views: 1110

Found

...
by Dr. Phibes
Wed Jul 08, 2015 10:25 pm
Forum: General Synthesizers
Topic: The Incredible Longevity of Old Tube Equipment!!
Replies: 4
Views: 1590

Re: The Incredible Longevity of Old Tube Equipment!!

Now that is pretty damn cool.
by Dr. Phibes
Wed Jul 08, 2015 1:46 pm
Forum: HELP!
Topic: Bad Juno 106 voice, NOT chip related??
Replies: 3
Views: 928

Re: Bad Juno 106 voice, NOT chip related??

I suspect that one of the demux chips (4051) that feeds control voltages to the affected chip, or one of the associated voltage buffers, has failed. If it's the VCF on voice 5 that's playing up then I would focus on IC23 (the demux) and IC18a (quad op-amp) on the module board. With a multimeter try ...
by Dr. Phibes
Wed Jul 08, 2015 12:55 pm
Forum: General Synthesizers
Topic: Yamaha Reface
Replies: 407
Views: 101746

Re: Yamaha Reface

Forgive me if I don't immediately s**t myself with excitement.
by Dr. Phibes
Sun Jun 21, 2015 4:32 pm
Forum: HELP!
Topic: SH-101 with issues
Replies: 10
Views: 1999

Re: SH-101 with issues

Yeah, the thing with power switch is that one of its poles actually controls the reference voltage for the D/A. If the contacts get poor (as can often happen) that mucks up the rest of the circuit. This post on analogue-heaven describes a way of calibrating the VCO with just a guitar tuner. Even if ...
by Dr. Phibes
Sun Jun 21, 2015 4:54 am
Forum: HELP!
Topic: SH-101 with issues
Replies: 10
Views: 1999

Re: SH-101 with issues

Ok cool - come to think of it the fact that D/A is sending out the correct control voltages ought to rule out the power switch problem. Do you have access to an oscilloscope for VCO calibration procedures?
by Dr. Phibes
Sun Jun 21, 2015 1:09 am
Forum: HELP!
Topic: SH-101 with issues
Replies: 10
Views: 1999

Re: SH-101 with issues

Have you tried any of the calibration procedures detailed in the service manual? You can make sure the digital/analogue converter is accurately configured just with a basic multimeter.