Search found 35 matches

by bloodyhell
Thu Aug 15, 2019 11:30 am
Forum: Fractional Rack Modules
Topic: Paia 2720 vco & sine/pwm calibration nightmare
Replies: 10
Views: 1218

What is the watts and tolerance supposed to be? I understand that the brown resistors are metal oxide but the only ones I have I got from Radioshack ages ago, and they appear to be carbon? (beige body) - can I use those kind or should I stick with the kind used on the vco board?
by bloodyhell
Sat Aug 10, 2019 11:54 pm
Forum: Fractional Rack Modules
Topic: Paia 2720 vco & sine/pwm calibration nightmare
Replies: 10
Views: 1218

Thanks a lot! That'll give me a starting point on troubleshooting without doctoring around too much.
by bloodyhell
Sat Aug 10, 2019 10:30 pm
Forum: Fractional Rack Modules
Topic: Paia 2720 vco & sine/pwm calibration nightmare
Replies: 10
Views: 1218

Thanks for the reply, I'll try that when I get back home. It's a 2a, my bad. If the 2a tracks better then there must be something very wrong with mine. Were there any other versions for the sine/pwm module as well? Also, any ideas why the trimmers for adjusting the triangle waves don't work? I alrea...
by bloodyhell
Sat Aug 10, 2019 9:16 pm
Forum: Fractional Rack Modules
Topic: Paia 2720 vco & sine/pwm calibration nightmare
Replies: 10
Views: 1218

Ok, so I finally got around trying to calibrate the vco and sine/pwm modules, following exactly the instructions for calibrating by ear (I don't own an oscilloscope), and repeatedly ran into the same problems: On the vco: when trying to set the triabgle waveform to the mellowest sounding tone, the a...
by bloodyhell
Tue Jul 30, 2019 11:27 am
Forum: Fractional Rack Modules
Topic: Paia 2720 vco & sine/pwm calibration nightmare
Replies: 10
Views: 1218

Yes, the vco doesn't have sine but it's companion, the sine/pwm module does produce a sine wave and cv controllable pulse. On the vco, the trimmers for the triangle wave seem to do nothing, and the pwm doesn't track right. Switching R8 with a 10k trimmer had no effect. My biggest problem right now i...
by bloodyhell
Mon Jul 29, 2019 5:46 pm
Forum: Fractional Rack Modules
Topic: Paia 2720 vco & sine/pwm calibration nightmare
Replies: 10
Views: 1218

Paia 2720 vco & sine/pwm calibration nightmare

I've been struggling to calibrate the vco and sine/pwm modules for some time now, particularly with the pwm range and tracking. I managed to get a reasonably stable pulsewidth across the keyboard but still gets thinner at the higher notes. Replacing R8 with a 10k trimmer had no.effect. I'm also stru...
by bloodyhell
Sat Jul 20, 2019 6:33 pm
Forum: Fractional Rack Modules
Topic: Paia 4700 vcfs affect vco pitch why?
Replies: 2
Views: 852

Took out all but one vco and one vcf. The modules were attached to the power bus with alligator clips, yikes.. I connected both modules as close to the beginning of the supply bus as possible, and started testing as follows: Patch: VCO (saw) > VCF input, VCF output (lp) > headphones Bias 0v-+5v > VC...
by bloodyhell
Fri Jul 19, 2019 9:46 pm
Forum: Fractional Rack Modules
Topic: Paia 4700 vcfs affect vco pitch why?
Replies: 2
Views: 852

Paia 4700 vcfs affect vco pitch why?

So the symptom is that if I patch any of the vco's into any of the filters, the pitch drops slightly (but irritatingly noticeably) near the high end of the cutoff. Granted that my whole system came with a single 2720 type power supply to power some 12 modules, could that be the problem? Or is that a...
by bloodyhell
Mon Jul 15, 2019 12:59 am
Forum: Fractional Rack Modules
Topic: Paia 4700 year of introduction?
Replies: 6
Views: 1053

Paia 4700 year of introduction?

Just out of plain nerdy curiosity, I wonder when the 4700 was introduced. I got 1978 and 1981, then again, manuals for some of the 4700 modules read copyright 1974 and 1976. Which is it now? The 4700 I possess came with a 2720 style power supply, does that mean it's a very early one?
by bloodyhell
Mon Jul 15, 2019 12:22 am
Forum: Fractional Rack Modules
Topic: Paia 4700 with 2700 power supply (how do I kill the hum?)
Replies: 6
Views: 1017

this was supposed to be a separate thread but I accidentally posted it as a reply to this post. Please remove this reply, thanks.
by bloodyhell
Mon Jul 15, 2019 12:13 am
Forum: Fractional Rack Modules
Topic: Paia 4700 with 2700 power supply (how do I kill the hum?)
Replies: 6
Views: 1017

Paia 4700 with 2700 power supply (how do I kill the hum?)

I recently got a Paia 4700 and I love it, but what strikes me odd is that it has a lone 2720 power module, which is inherently dodgy and seems to produce plenty of hum. I do not like that one bit. Did the early 4700's use to come with the old supply instead of the regulated one or the watt bliocks? ...
by bloodyhell
Sun Apr 14, 2019 5:40 pm
Forum: General Gear
Topic: Novation Xio25 as one way usb to midi converter?
Replies: 2
Views: 589

Novation Xio25 as one way usb to midi converter?

My computer went on the fritz so now I'm stuck with an old laptop. I do have a usb-midi cable but it never worked right (switched connectors & won't pass midi cc), so I was wondering if I could hook up my Xio25 in such a way that it acts as something like a one way usb-midi converter? The idea is to...
by bloodyhell
Sat Mar 09, 2019 3:17 pm
Forum: General Gear
Topic: Question about ancient opcode studio 3 and midi setup
Replies: 0
Views: 362

Question about ancient opcode studio 3 and midi setup

I found an opcode studio 3 at a thrift store some time ago. Until then I used to daisy chain two synths and one rack synth together and that worked fine for me. Fast forward to now, the number of gear has more than doubled and I'd like to use the studio 3 together with an equally ancient portman 2x4...
by bloodyhell
Sat Mar 09, 2019 1:34 pm
Forum: General Gear
Topic: clock/trigger DAW sequencer with v-trig (from Boss DR110)?
Replies: 5
Views: 672

That was one way I was thinking of, like hook the accent trigger out to mic in and have that trigger the tracks. Haven't tried that yet tho. Got a lot of gear lately and am trying to figure out the midi routings :hmm: can someone recommend a good foss/Linux based sequencer that can work with this se...
by bloodyhell
Sun Mar 03, 2019 12:45 am
Forum: General Gear
Topic: clock/trigger DAW sequencer with v-trig (from Boss DR110)?
Replies: 5
Views: 672

clock/trigger DAW sequencer with v-trig (from Boss DR110)?

I have a Boss DR110 drum machine. I would like to interface the Boss with my DAW/software sequencer and have some tracks being clocked/triggered by the Boss's v-trig so that everything is nicely synced to the beat. Is there a fairly easy way to accomplish this?
by bloodyhell
Sun Feb 03, 2019 1:21 pm
Forum: Music Tech DIY
Topic: Kurzweil K2000S transplanting sampler option possible?
Replies: 8
Views: 680

Ok, I have another quick question that is a bit off topic but related to another thread I posted some time ago that never got any replies (and I hope it's ok to talk about it here) - Is it even feasible to try and fix the not so dead (zombified? comatous?) K2000S and hunt down chips and components? ...
by bloodyhell
Sat Feb 02, 2019 3:30 pm
Forum: Music Tech DIY
Topic: Kurzweil K2000S transplanting sampler option possible?
Replies: 8
Views: 680

But can I AM mod, sync, wrap, etc the samples like any of the regular waveforms?
by bloodyhell
Sat Feb 02, 2019 2:57 pm
Forum: Music Tech DIY
Topic: Kurzweil K2000S transplanting sampler option possible?
Replies: 8
Views: 680

Ok, good to know that I don't necessarily need the sampler option, but is there any way to real time manipulate loaded samples as part of a sound structure, or: Which options and features am I missing out without the sampler option that couldn't be done on the computer during live play or when creat...
by bloodyhell
Fri Feb 01, 2019 8:32 pm
Forum: Music Tech DIY
Topic: Kurzweil K2000S transplanting sampler option possible?
Replies: 8
Views: 680

Kurzweil K2000S transplanting sampler option possible?

So I have a dead Kurzweil K2000S and a K2000R. One has the sampler option, the other doesn't. Is it at all possible to transplant the sampler hardware from one to another? If not from keyboard to rack, how about from K2000S to a regular K2000? By the way the dead synth is not quite dead. I was able ...
by bloodyhell
Sun Sep 30, 2018 5:17 pm
Forum: General Gear
Topic: Irrational and unexplainable gear phobias...
Replies: 104
Views: 4215

Hey, no hate for the Kawai K4 please! Jk, I forgive you lol but are there any specific Kawai's you dislike or Kawai keyboards in general? Just being curious. The K4 and K3 and Teisco-Kawai SX's are pretty cool synths tho if you ask me. I do share your dissent against gear regarding the reboot, relau...
by bloodyhell
Sun Sep 30, 2018 4:20 pm
Forum: General Gear
Topic: Kurzweil K2000S resurrection - need help/advice
Replies: 0
Views: 200

Kurzweil K2000S resurrection - need help/advice

I have a Kurzweil K2000S that I won online at an auction at Shopgoodwill.com. It was listed as untested so I already knew the risk I was taking but at the price I got it for I think it was worth it IF I can fix what's wrong. Upon arrival when I plugged it in and powered it on, the LEDs of the first ...
by bloodyhell
Sun Apr 15, 2018 2:00 am
Forum: General Gear
Topic: Synths you sold, now miss but are too expensive to get back
Replies: 73
Views: 3144

Synths you sold, now miss but are too expensive to get back

I suppose everybody's been there. You used to have a synth that you got a bit tired of, sold it for whatever reason but now you reminiscence about the good times when you used to enjoy your then beloved synth. Now you so desperately want it back. But you can't. Because the price of it has been blown...
by bloodyhell
Mon Jan 23, 2017 4:24 pm
Forum: General Gear
Topic: If you had to give up most of your synth gear...
Replies: 140
Views: 9809

If you had to give up most of your synth gear...

Let's hope it never comes to this, but if you could only keep one mono, one poly and one drum machine, which would it be?

My picks of the gear I actually have: Ensoniq ESQ-1, Korg 770 or MFB Microzwerg, Korg PMA-5 (technically not a drum machine but I use it as one)

Your picks are...?
by bloodyhell
Tue Jun 07, 2016 10:34 pm
Forum: Music Tech DIY
Topic: Problem with Soundmaster SR-88 drum machine*
Replies: 8
Views: 936

Yeah, I was wondering about that, it confuses the crap out of me. As for test gear, I only have a digital multimeter. I'll have to check what's near those pins that you mentioned. Maybe there's a dead cap or resistor that causes me all the headache. I'd hate to find out that I spent $12 for a chip w...
by bloodyhell
Mon Jun 06, 2016 3:41 pm
Forum: Music Tech DIY
Topic: Problem with Soundmaster SR-88 drum machine*
Replies: 8
Views: 936

Yes, the SR88 uses the 5501, and no, I always used 6V. But I read somewhere that replacing the batteries tends to fill the ram with random noise. Aside of that, as mentioned before, it seems like the sequencer refuses to advance in write mode. I realized that when trying stepping through the pattern...

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