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  Topic: 25539 replacement chip?
rjd2

Replies: 4
Views: 5180

Post Posted: Sat Jul 06, 2019 8:20 am    Subject: 25539 replacement chip?
Forum:  DIY Hardware and Software
PM me if you do! I could totally go for a few. Glad to pay shipping too.
  Topic: Connectors on XR2206 PCB
rjd2

Replies: 8
Views: 10123

Post Posted: Sun Jul 27, 2014 10:10 am    Subject: Connectors on XR2206 PCB
Forum:  DIY Hardware and Software » Thomas Henry designs
Good friend! Would you mind DMing me the connection notes please? I too cannot translate the cn codes on the pcb... Thanks!
  Topic: some trouble with the LFO on Living VCO's
rjd2

Replies: 1
Views: 6929

Post Posted: Wed Jun 18, 2014 4:58 am    Subject: some trouble with the LFO on Living VCO's
Forum:  DIY Hardware and Software » Jürgen Haible designs
hi all, i'm building these out now, and having a little trouble. should the LFO be showing up at the "right" pin of DRVOUT when turning up the vibrato depth pot? i'm not getting the FM or PW ...
  Topic: Input tap points on a Freeman String Symphonizer
rjd2

Replies: 0
Views: 1221

Post Posted: Mon Apr 21, 2014 4:36 pm    Subject: Input tap points on a Freeman String Symphonizer
Subject description: help?
Forum:  DIY Hardware and Software
hi all, so maybe i'm crazy, and if it's not smart, just tell me....but i'd like to run audio inputs to both the reverb driver and "animation"(chorus) driver on my FSS, cause they would be re ...
  Topic: Help on a capacitor substitution
rjd2

Replies: 1
Views: 3826

Post Posted: Fri Dec 06, 2013 1:49 pm    Subject: Help on a capacitor substitution
Subject description: can a .047uf bypass go up or down?
Forum:  DIY Hardware and Software
hi all, hopefully a quick question.

restoring a Yamaha CS-40M. on the attached board, there are a bunch of .047uf poly caps that look like they function as bypass caps to the -15V rail, and are toa ...
  Topic: where should I be seeing 36V start in this circuit?
rjd2

Replies: 9
Views: 3889

Post Posted: Fri Jun 14, 2013 5:03 am    Subject: where should I be seeing 36V start in this circuit?
Forum:  DIY Hardware and Software
thanks so much, everybody. very helpful.

something is pulling impedance measurements low in the front section of this. from CR7 thru R56, im not reading what i should across almost any of the compo ...
  Topic: where should I be seeing 36V start in this circuit?
rjd2

Replies: 9
Views: 3889

Post Posted: Thu Jun 13, 2013 8:12 am    Subject: where should I be seeing 36V start in this circuit?
Forum:  DIY Hardware and Software
OK-making progress. one quick follow-up question:

Q11 was blown. when i got the unit, it was blown. so something downstream of it is likely causing it to repeatedly blow. i happen to have several o ...
  Topic: where should I be seeing 36V start in this circuit?
rjd2

Replies: 9
Views: 3889

Post Posted: Thu Jun 13, 2013 4:14 am    Subject: where should I be seeing 36V start in this circuit?
Forum:  DIY Hardware and Software
Yea, I know that a resistor will not always read it's value in circuit. i do, however, have 2 of these preamps, a perfectly working one, and the one im fixing. on the good one, R56 and R57 read their ...
  Topic: where should I be seeing 36V start in this circuit?
rjd2

Replies: 9
Views: 3889

Post Posted: Wed Jun 12, 2013 6:27 pm    Subject: where should I be seeing 36V start in this circuit?
Forum:  DIY Hardware and Software
AHA! thanks so much for this. super helpful. i focused on that area, and found that R56 and R57 don't read their proper values when in circuit. i know for a fact that they should. i now need to try to ...
  Topic: where should I be seeing 36V start in this circuit?
rjd2

Replies: 9
Views: 3889

Post Posted: Wed Jun 12, 2013 9:14 am    Subject: where should I be seeing 36V start in this circuit?
Forum:  DIY Hardware and Software
Hi folks, I'm hoping you can give me some insight into reading this schem:

http://wikigear.org/wiki/images/f/fd/M441m-schematic3_assembled.jpg

particularly, this: in the upper right hand corner, ...
  Topic: Moog 901 DIY, or skip it and look elsewhere?
rjd2

Replies: 4
Views: 3672

Post Posted: Fri Jan 25, 2013 6:26 pm    Subject: Moog 901 DIY, or skip it and look elsewhere?
Forum:  DIY Hardware and Software
got it. thanks for the info. so, if you were to suggest a DIY VCO that you think would be most suitable who was shooting for the closest SOUND to an original moog VCO, what would it be?

im tempted ...
  Topic: Moog 901 DIY, or skip it and look elsewhere?
rjd2

Replies: 4
Views: 3672

Post Posted: Fri Jan 25, 2013 1:14 pm    Subject: Moog 901 DIY, or skip it and look elsewhere?
Subject description: advice welcome
Forum:  DIY Hardware and Software
hi folks, im wondering if you may have any suggestions. i can't tell if listening to too many records that used moog modulars has corrupted my brains, or if those VCO's are actually worth DIY-ing. aft ...
  Topic: Moog modular ring modulator w/ transformers?
rjd2

Replies: 4
Views: 3243

Post Posted: Fri Dec 14, 2012 2:04 pm    Subject: Moog modular ring modulator w/ transformers?
Forum:  DIY Hardware and Software
thanks!
  Topic: Moog modular ring modulator w/ transformers?
rjd2

Replies: 4
Views: 3243

Post Posted: Fri Dec 14, 2012 12:46 pm    Subject: Moog modular ring modulator w/ transformers?
Forum:  DIY Hardware and Software
hey folks, i stumbled across this ebay auction:

http://www.ebay.com/itm/Vintage-Ring-Modulator-Unit-for-Moog-Modular-System-Analog-Synthesizer-Rare-/170957157600?pt=Keyboards_MIDI&hash=item27cd ...
  Topic: female wire harness, pre-stripped?
rjd2

Replies: 5
Views: 2368

Post Posted: Mon Oct 29, 2012 1:20 pm    Subject: female wire harness, pre-stripped?
Forum:  DIY Hardware and Software
yes-thanks!!!
  Topic: female wire harness, pre-stripped?
rjd2

Replies: 5
Views: 2368

Post Posted: Sun Oct 28, 2012 4:23 pm    Subject: female wire harness, pre-stripped?
Forum:  DIY Hardware and Software
thanks-close! now imagine that those wiring assemblies had harnesses only on ONE side, not both. if the other side were stripped wire, then that's exactly what i was hoping for.

or, i could just bu ...
  Topic: female wire harness, pre-stripped?
rjd2

Replies: 5
Views: 2368

Post Posted: Fri Oct 26, 2012 8:28 am    Subject: female wire harness, pre-stripped?
Subject description: see folks using these. can't find 'em.
Forum:  DIY Hardware and Software
hey all, so there are these male pcb connectors that you can solder into a pcb for connecting to panels. example:

http://www.mouser.com/ProductDetail/TE-Connectivity/640456-2/?qs=%2fha2pyFaduhbIktX ...
  Topic: Can you help me find an equivalent transistor? 2SC1212A
rjd2

Replies: 2
Views: 1706

Post Posted: Mon Jul 09, 2012 8:13 am    Subject: Can you help me find an equivalent transistor? 2SC1212A
Forum:  DIY Hardware and Software
thanks!
  Topic: Can you help me find an equivalent transistor? 2SC1212A
rjd2

Replies: 2
Views: 1706

Post Posted: Sun Jul 08, 2012 7:42 am    Subject: Can you help me find an equivalent transistor? 2SC1212A
Forum:  DIY Hardware and Software
hi all, i need to replace this power transistor:

http://pdf1.alldatasheet.net/datasheet-pdf/view/270759/SAVANTIC/2SC1212A.html

mouser doesnt show it as available, so i need a working sub. its fo ...
  Topic: How to wire a Power-One HBAA-40w-A for 15v?
rjd2

Replies: 6
Views: 2607

Post Posted: Thu Jan 19, 2012 5:53 am    Subject: How to wire a Power-One HBAA-40w-A for 15v?
Forum:  DIY Hardware and Software
yup, got it-jumpers were named VW1 and VW2. thanks!

fyi, that particular model, ideal for modulars w/ its +15,-15,+5,-5 VDC outputs, seems to be cheap on teh ebays. i just got two of them for unde ...
  Topic: How to wire a Power-One HBAA-40w-A for 15v?
rjd2

Replies: 6
Views: 2607

Post Posted: Sat Jan 14, 2012 5:35 pm    Subject: How to wire a Power-One HBAA-40w-A for 15v?
Subject description: cause yea, i....forgot
Forum:  DIY Hardware and Software
hey folks, do any of you know how to wire one of these for +/-15v instead of 12? the datasheet says it can be done, and i have one in my modular wired as such, i just dont remember how i did it. need ...
  Topic: Best way to do+/-15V psu AWAY from your modular?
rjd2

Replies: 9
Views: 3902

Post Posted: Thu Dec 22, 2011 10:55 am    Subject: Best way to do+/-15V psu AWAY from your modular?
Forum:  DIY Hardware and Software
hey folks, so i decided that some of the modules ive got stuffed, i dont want to put in my modular. want em for my live room(CP80 thru a phaser sounds so good). i'm leaning towards either doing them & ...
  Topic: Elka Synthex PSU; help w/ schems and measurements
rjd2

Replies: 3
Views: 2590

Post Posted: Fri Sep 02, 2011 9:06 am    Subject: Elka Synthex PSU; help w/ schems and measurements
Forum:  DIY Hardware and Software
thanks mych, mongo.

fyi, here is another link to view or pull down the schems, these should be a higher resolution and much easier to look at:

http://manuals.fdiskc.com/flat/Elka%20Synthex%20Sch ...
  Topic: Elka Synthex PSU; help w/ schems and measurements
rjd2

Replies: 3
Views: 2590

Post Posted: Wed Aug 31, 2011 7:07 am    Subject: Elka Synthex PSU; help w/ schems and measurements
Forum:  DIY Hardware and Software
hey folks, so i am trying to get the PSU on this synthex up and running. it currently has the +12v and -12v rails working, the +2.5v, +5v and +6.8v rails are down. 2.5v and 5v rails both read +1.5v.
...
  Topic: Help tracing a problem in a DIY pedal
rjd2

Replies: 2
Views: 1554

Post Posted: Sun Jul 17, 2011 3:02 pm    Subject: Help tracing a problem in a DIY pedal
Forum:  DIY Hardware and Software
cool, thanks. i replaced the transistor, as i was getting some continuity to several legs and the 9v rail.

its passing signal now, but its NOTICEABLY quieter on, than in bypass. is yours about th ...
 
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