Search found 278 matches

by rjd2
Wed Feb 26, 2014 9:25 pm
Forum: General Synthesizers
Topic: So yea...that JP8 that needed some love...
Replies: 20
Views: 3658

So yea...that JP8 that needed some love...

it's done. i scavenged a few IR chips out of a Juno 6. the rest of the parts needed-a couple IC's, diodes, sockets-i all had laying around. i had some leftover black walnut from another project; it was enough to knock up the end cheeks. kenton midi got installed. recapped the PSU. thoroughly cleaned...
by rjd2
Fri Feb 07, 2014 2:10 pm
Forum: General Synthesizers
Topic: To the person who snapped up the Jupiter 8 for 3500
Replies: 37
Views: 6878

Re: To the person who snapped up the Jupiter 8 for 3500

am i detecting a slight element of something along the lines of... "synth bargain pissing contest", or maybe its just me?
by rjd2
Wed Jan 29, 2014 2:53 am
Forum: HELP!
Topic: help with gate issue on a Roland JP8
Replies: 4
Views: 550

Re: help with gate issue on a Roland JP8

thanks! was looking in the wroooong part of the schems altogether.
by rjd2
Tue Jan 28, 2014 10:47 pm
Forum: HELP!
Topic: help with gate issue on a Roland JP8
Replies: 4
Views: 550

Re: help with gate issue on a Roland JP8

Are you seeing a 15V gate on the collector of transistor 16 for that voice when you play a key associated with that voice? no, it's NOT!!! is that where the incoming gate signal meets the module board? on the working voice, it's going 0-10V(assuming the middle pin is the collector), but on the non-...
by rjd2
Tue Jan 28, 2014 9:05 pm
Forum: HELP!
Topic: help with gate issue on a Roland JP8
Replies: 4
Views: 550

help with gate issue on a Roland JP8

hi all, im rehabbing a JP8, and one voice has a gate that isn't opening. at the TP, it shows an offset of about -.9V. (lets call it 1A; 1B works properly). i'm having a little trouble understanding how to trace the source of the gate within the module board. i KNOW the issue is local to the module b...
by rjd2
Tue Jan 21, 2014 7:10 pm
Forum: General Synthesizers
Topic: To the person who snapped up the Jupiter 8 for 3500
Replies: 37
Views: 6878

Re: To the person who snapped up the Jupiter 8 for 3500

some days, the bear gets you. i happened to get the bear that day. for the record, it needs work. voice #5 is dead. the mod button is either shot, or needs an extremely thorough cleaning. the whole thing is massively out of calibration-autotune doesnt get the remaining 7 voices in tune enough to rec...
by rjd2
Fri Dec 27, 2013 3:25 pm
Forum: Buyer's Guide
Topic: Sell everything and grab a CS-80
Replies: 46
Views: 10156

Re: Sell everything and grab a CS-80

Steve Jones hit the nail on the absolute head. I would say the CS80 is the #1 most absolute enjoyable synth to sit in front of and play-of all time. I consider the layout to be on par with the ARP 2600-arguably the most intuitively laid out polysynth ever made. If you want a synth that is a recordin...
by rjd2
Thu Feb 28, 2013 3:32 am
Forum: General Synthesizers
Topic: I Dream of Wires
Replies: 233
Views: 27599

Re: I Dream of Wires

Holy s**t this thread smells like f**k nerd There's nothing you can do that is quite as "f**k nerd" as pointing out how "f**k nerd" a thread is that you're reading, responding to, and which applies in some way to you. :thumbleft: congratulations, you pointed out with stark, pragmatic clarity the na...
by rjd2
Wed Feb 27, 2013 2:06 am
Forum: General Synthesizers
Topic: I Dream of Wires
Replies: 233
Views: 27599

Re: I Dream of Wires

Holy s**t this thread smells like f**k nerd
by rjd2
Wed Apr 04, 2012 2:40 am
Forum: General Synthesizers
Topic: The Wonderful World of Wireless MIDI
Replies: 6
Views: 1692

Re: The Wonderful World of Wireless MIDI

M-Audio wireless MIDI in action:

by rjd2
Tue Jan 31, 2012 4:20 am
Forum: HELP!
Topic: OBXA Tandulum caps.
Replies: 56
Views: 2850

Re: OBXA Tandulum caps.

read the part off the actual part in the circuit board, not the schems. in list form. on here. someone'll help.
by rjd2
Tue Jan 24, 2012 9:53 pm
Forum: HELP!
Topic: OBXA Tandulum caps.
Replies: 56
Views: 2850

Re: OBXA Tandulum caps.

are you calibrating scale because it sounds out of scale to you, or because you think this is something you should do? its a question worth asking. i am going to tell you right now that if you are planning on tuning the voice cards, and you dont have experience tuning synths, i will bet you $100 th...
by rjd2
Sat Jan 21, 2012 11:57 pm
Forum: HELP!
Topic: OBXA Tandulum caps.
Replies: 56
Views: 2850

Re: OBXA Tandulum caps.

are you calibrating scale because it sounds out of scale to you, or because you think this is something you should do? its a question worth asking. i am going to tell you right now that if you are planning on tuning the voice cards, and you dont have experience tuning synths, i will bet you $100 tha...
by rjd2
Fri Jan 20, 2012 4:31 pm
Forum: HELP!
Topic: OBXA Tandulum caps.
Replies: 56
Views: 2850

Re: OBXA Tandulum caps.

AFAIK, C0-C5 typically refers to the actual, physical key.
by rjd2
Wed Jan 18, 2012 5:18 pm
Forum: HELP!
Topic: Data bus line problem on OB-XA. schem help?
Replies: 1
Views: 210

Data bus line problem on OB-XA. schem help?

hey folks, hope you may be able to help me. here's the service manual, the pot board is on page 53: http://www.synthfool.com/docs/Oberheim/Oberheim_OBXa/oberheim_obxa_service_manual_3.pdf and here's the problem: a number of panel switches on my OBXA are inoperable, or intermittent. they ALL lie alon...