Search found 100 matches

by toneman
Wed Apr 15, 2015 7:07 pm
Forum: PAiA Jabber
Topic: Cap replacement - off topic
Replies: 2
Views: 12963

Re: Cap replacement - off topic

Hey PaiaBill! imo, tantalums usefullness are over hyped/overrated. For power supplies, electros are just as good as tantalums. Electros might be a little larger for the same capacity and voltage, but, don't think size is an issue in PAiA stuff. 10mfd is 10mfd. In stompboxes, folks like to replace 1u...
by toneman
Fri Mar 20, 2015 9:34 pm
Forum: PAiA Jabber
Topic: Hugh LeCaine
Replies: 3
Views: 15172

Re: Hugh LeCaine

this is amazing stuff!!!

never knew this guy existed, and I thought I was into electronic music tech.

i didn't start electronic stuff until about 1975.

8-)
by toneman
Wed Feb 11, 2015 6:55 pm
Forum: PAiA Jabber
Topic: Digitizing a 2720-8 keyboard with EK-3 board
Replies: 11
Views: 34492

Re: Digitizing a 2720-8 keyboard with EK-3 board

just noticed the addition of a new KEYBOARD manual in the manuals section. Post K37/61 Series V Universal Keyboard Controller a quick peruse shows that there is a phantom view of the K-37 encoder pcb. Looks almost just like the EK-7 with diodes!!! I remember these keyboards when they came out. Had f...
by toneman
Tue Feb 10, 2015 5:13 pm
Forum: PAiA Jabber
Topic: dead Korg DW8000
Replies: 4
Views: 16822

Re: dead Korg DW8000

still working on that dead korg, I see. Give it a GOOD lookover with a large magnifying glass. maybe there's still a solder blob from the explosions crossing some traces? I use my index finger to feel the tops of the chips to see/feel if any are running hotter that the others. Feel the traces also. ...
by toneman
Sat Jan 31, 2015 10:51 am
Forum: PAiA Jabber
Topic: Digitizing a 2720-8 keyboard with EK-3 board
Replies: 11
Views: 34492

Re: Digitizing a 2720-8 keyboard with EK-3 board

yep. this is the pcb referred to in figure 8 in the 8782A digital keyboard assembly supplement manual. Figure 7 of the same manual shows the up-side-down keyboard and the 2 buss bars and the pieces of support tubing needed after the rear buss bar is cut. Figure 6 shows the mounting position of the t...
by toneman
Fri Jan 30, 2015 11:29 pm
Forum: PAiA Jabber
Topic: Digitizing a 2720-8 keyboard with EK-3 board
Replies: 11
Views: 34492

Re: Digitizing a 2720-8 keyboard with EK-3 board

found a another pic of an 8782A keyboard pcb.

it has the INfamous PAiA blue board.

http://2.bp.blogspot.com/-QqLFxUGCdBY/U ... 1600/4.jpg
by toneman
Mon Jan 26, 2015 11:17 pm
Forum: PAiA Jabber
Topic: Digitizing a 2720-8 keyboard with EK-3 board
Replies: 11
Views: 34492

Re: Digitizing a 2720-8 keyboard with EK-3 board

U didn’t realize there was a “diode board”(?) It’s easy to see why…..read on…. For the following comments, please refer to the EK-3 article and the “Friendly Stories…” article. Pages and figures referred to are the actual page numbers at the bottom, not the pdf page number. OK…..? ok... It’s easy to...
by toneman
Sun Jan 25, 2015 10:35 pm
Forum: PAiA Jabber
Topic: Digitizing a 2720-8 keyboard with EK-3 board
Replies: 11
Views: 34492

Re: Digitizing a 2720-8 keyboard with EK-3 board

well, I just quickly scanned that PaiaGroup pdf, but there were a lot of repetitions that I got brain flooze. Re-re-looking at the jpgs of the keyboard, I don't see the diode matrix pcb(?) Also, the keyboard buss looks like it has NOT been split into octaves since there is no clear tubing supporting...
by toneman
Sun Jan 25, 2015 3:24 pm
Forum: PAiA Jabber
Topic: Digitizing a 2720-8 keyboard with EK-3 board
Replies: 11
Views: 34492

Re: Digitizing a 2720-8 keyboard with EK-3 board

Hey Dan! Have U read "Friendly Stories About Computers/Synthesizers" by Simonton? The multi-part article explains how the (digital)keyboard scanning is accomplished and how it is implemented. It's a must read. Don't know if Scott posted it at this site somewhere(?) Long time ago, I uploaded pdf's of...
by toneman
Thu Jan 15, 2015 4:13 pm
Forum: PAiA Jabber
Topic: Cable construction for CV's in and out of the 9700?
Replies: 7
Views: 22877

Re: Cable construction for CV's in and out of the 9700?

Scott wrote me that "When connecting with external equipment, a patch cable which joins or establishes a ground between the devices is needed, ie just a standard patch cable with tip to tip and sleeve to sleeve wiring between the plugs." so I guess that's that. My experience with other synths says ...