Author Topic: 13-pin to 24-pin converter...  (Read 1894 times)

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Offline susbemol

13-pin to 24-pin converter...
« on: March 11, 2017, 05:10:26 AM »
Hey guys,

I've been looking for a converter that would allow me to use my existing 13-pin guitar with old 24-pin systems. Is anyone aware of anyone making them?

It seems that Wayne Jones is no longer making his box and another one I've come across seems to be excessively expensive for what it is. I think I'd only need the basic string signal (no need for the additional controllers signal) to be converted but I was hoping to avoid having to build one myself.

Any comments or suggestions will be much appreciated.
« Last Edit: March 11, 2017, 08:17:05 AM by susbemol »

Offline Brak(E)man

Re: 13-pin to 24-pin converter...
« Reply #1 on: March 11, 2017, 07:18:44 AM »
I want an 24 to  13 , so any suggestions are welcome
swimming with a hole in my body

I play Country music too, I'm just not sure which country it's from...

"The only thing worse than a guitar is a guitarist!"
- Lydia Lunch

Offline chrish

Re: 13-pin to 24-pin converter...
« Reply #2 on: March 11, 2017, 11:29:50 AM »
There's a roland bc-13 currently for sale on reverb.com, but the seller wants around $700 with shipping.

Offline Elantric

Re: 13-pin to 24-pin converter...
« Reply #3 on: March 11, 2017, 01:22:33 PM »
Quote
There's a roland bc-13 currently for sale on reverb.com, but the seller wants around $700 with shipping.

And it would not work anyway

the BC-13 converts 24 pin to 13 pin  - its a one direction interface

same with Waynes versions
http://www.joness.com/gr300/bc13_S.htm
http://www.joness.com/gr300/BX13.htm
Heres Wayne's version



the OP wants to convert 13 pin to 24 pin, a clever hacker could review our schematic library and design one
http://www.marksmart.net/gearhack/gr300/analogmods/cablecut/cablecut.html

Wayne Joness used to offer one  ( and TSC / Proix in Japan did too - 20 years ago ) -  - but its essentially a supply vs demand  problem -VERY  few folks are seeking this type interface. after 9 years and nearly 20,000 members  - this is the first time ever heard of a 13 pin to 24 pin interface being requested
« Last Edit: October 05, 2017, 10:08:41 AM by admsustainiac »

Offline sec6

Les Paul DC Standard (GK Kit), Ibanez RG420GK, Boss GP-10, Ableton 9 Intro, Omnisphere 2, Arturia Synclavier, Arturia VDM

Offline Elantric

Re: 13-pin to 24-pin converter...
« Reply #5 on: March 11, 2017, 01:40:36 PM »


https://reverb.com/item/4342529-roland-gr-13-to-24-pins-converter-for-gr-300-gr-700-gr-100-gm-70-korg-z3


HOMEMADE GUITAR CONVERTER 13 TO 24 PINS
YOU CAN CONTROL GR-300 GR-700 ......
WITH
YOUR GK-2 GK-2A GK-3....
« Last Edit: October 05, 2017, 10:05:35 AM by admsustainiac »

Offline susbemol

Re: 13-pin to 24-pin converter...
« Reply #6 on: March 11, 2017, 01:48:28 PM »
Thanks, guys. I've seen the one from the gent in France before but at £300+, I was hoping I could find another alternative. His offering is quite a bit more expensive than Wayne Jones' box which was much more fully featured.

Still, I will continue to look for another option and if not, maybe I'll try putting something together myself. Mark's original schematic and plans for this don't look so complicated.
« Last Edit: March 11, 2017, 06:11:57 PM by susbemol »

Offline Yohanes

Re: 13-pin to 24-pin converter...
« Reply #7 on: March 12, 2017, 04:04:39 AM »
I have successfully convert my G-707 24-pin into 13-pin guitar previously, so you quest more or less the same journey that I have done.

What unit do you want to control, (a GR-300 or GR-700)?

At www.joness.com/gr300/24pin.htm you can see each pin function. It is relative easy to achieve what you want only if you have the 24 pin connector. The cost of the unit you want is mostly because the connector, if you willing to replace the 24-pin connector into 25-pin printer type connector, it may reduce the unit cost significantly, but then you have to mod your unit 24-pin connector.

If you have decided to built one, and want to discuss, I am more than happy to help.
Yamaha Pacifica 510V
Roland G-707
Godin Freeway SA
Boss GP-10
Roland GR-50

Offline Brak(E)man

Re: 13-pin to 24-pin converter...
« Reply #8 on: March 12, 2017, 04:41:30 AM »
I have a gk1 external laying around somewhere , controller , cable , connector and all
I haven't used it ages
swimming with a hole in my body

I play Country music too, I'm just not sure which country it's from...

"The only thing worse than a guitar is a guitarist!"
- Lydia Lunch

Offline susbemol

Re: 13-pin to 24-pin converter...
« Reply #9 on: March 12, 2017, 02:23:21 PM »
I've already got most of the KORG ZD3 (only without the divided pickup bit) which is the equivalent of a GK1 so I'm hoping that perhaps I'll be able to build an interface box for it.

I plan on using it with a GR-300 if I can eventually find an affordable one (if ever?)!

Offline susbemol

Re: 13-pin to 24-pin converter...
« Reply #10 on: March 16, 2017, 06:38:19 AM »
I am planning to build this little box soon. Could I pick your brains about a couple of details, please?

I am planning to use a GKPX-14 (similar to a US-20 in functionality) made by @CodeSmart which a GP-10 (connected to its GKA input) will provide power for and then use one of the outputs to connect to the 13-pin to 24-pin converter box. It sounds as though the converter will need power to amplify the 13-pin signal so I assume I should still include the -/+15V in the converter box to power the active circuit in here. And also, am I right in that I should not include the +/-15V to +/-7V power conversion or connections back to the 13-pin side?

Mark Smart's original schematic, for reference:


Offline susbemol

Re: 13-pin to 24-pin converter...
« Reply #11 on: March 16, 2017, 07:14:00 AM »
Having thought about it a bit more, I should probably do the voltage conversion as per schematic as you never know if I might want to connect the guitar directly to box, instead of going through the GKPX-14. I think it shouldn't cause any problems since the GKPX-14 will just send those pins to ground.

Sorry for talking to myself for a bit there! :)

Offline CodeSmart

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Re: 13-pin to 24-pin converter...
« Reply #12 on: March 16, 2017, 04:17:08 PM »
I think it shouldn't cause any problems since the GKPX-14 will just send those pins to ground.
Sorry for talking to myself for a bit there! :)

"...send those pins to ground through a 1K resistor", is the correct phrase.
It would be ok.
Hex signals (in & out), +/-7V and ground is also available on a 20 pin header inside the box.
Got more gear than I need...and I like it!


Offline susbemol

Re: 13-pin to 24-pin converter...
« Reply #14 on: July 04, 2017, 10:01:57 AM »
Yeah, that's the same seller who was mentioned earlier in this thread.

Online admsustainiac


Offline Shingles

Re: 13-pin to 24-pin converter...
« Reply #16 on: October 06, 2017, 06:12:59 AM »
I converted my G707 15 or more years ago..

I did it by removing all the 24-pin electronics system, including the pickup, and replacing it with a GK2 internal kit. It works great and is completely reversible. This guitar gives me the best pitch to MIDI tracking of any guitar I've tried with the Axon AX100, including my #1 Godin LGXT, so I guess that stabiliser bar is actually doing what it was advertised to do!

Nik
--------------------------------
GT-Pro, VG99, Axon AX100, Repeater
Godin, PRS, Crafter and Roland guitars
Center Point Stereo Spacestation V3

Offline Brak(E)man

Re: 13-pin to 24-pin converter...
« Reply #17 on: October 06, 2017, 08:10:39 AM »
Yohan Damour makes 24-13 , 13-24 , hex fuzz and much more.
swimming with a hole in my body

I play Country music too, I'm just not sure which country it's from...

"The only thing worse than a guitar is a guitarist!"
- Lydia Lunch

Offline GuitarBuilder

Re: 13-pin to 24-pin converter...
« Reply #18 on: October 06, 2017, 09:43:50 AM »
Yohan Damour makes 24-13 , 13-24 , hex fuzz and much more.

Contact info would be very helpful!

Offline Brak(E)man

« Last Edit: October 06, 2017, 11:29:06 AM by Elantric »
swimming with a hole in my body

I play Country music too, I'm just not sure which country it's from...

"The only thing worse than a guitar is a guitarist!"
- Lydia Lunch

Offline Elantric

Re: 13-pin to 24-pin converter...
« Reply #20 on: October 06, 2017, 11:31:00 AM »

Offline Brak(E)man

Re: 13-pin to 24-pin converter...
« Reply #21 on: October 07, 2017, 05:04:20 AM »
he's also making hexfuzz and a 24 - 13 split box to two 13 outputs


damouryohan @ hotmail.com
http://www.mmattera.com/html/img_2010_owners.html

swimming with a hole in my body

I play Country music too, I'm just not sure which country it's from...

"The only thing worse than a guitar is a guitarist!"
- Lydia Lunch

Offline chrish

Re: 13-pin to 24-pin converter...
« Reply #22 on: October 07, 2017, 04:23:50 PM »
he's also making hexfuzz and a 24 - 13 split box to two 13 outputs
(Image removed from quote.)
interesting. Is he making his own 24 pin connectors in the standard Roland Style? That plug doesn't look like a 25 pin computer cable plug.

Offline Brak(E)man

Re: 13-pin to 24-pin converter...
« Reply #23 on: October 08, 2017, 12:28:25 AM »
interesting. Is he making his own 24 pin connectors in the standard Roland Style? That plug doesn't look like a 25 pin computer cable plug.

I beleive he's making them , I'm using a standard Roland 24 pin with my box, latch and all.
He asked if "same as the pic or two knobs locker plastic /metal" so I guess he makes or has both types of connectors
swimming with a hole in my body

I play Country music too, I'm just not sure which country it's from...

"The only thing worse than a guitar is a guitarist!"
- Lydia Lunch

Offline susbemol

Re: 13-pin to 24-pin converter...
« Reply #24 on: November 15, 2017, 04:55:06 AM »
After much head scratching and leaving it aside for quite some time, I've settled on a fairly simple solution for now - simply because it works great!

In essence, I built a box very similar to the one I used to connect a GK equipped guitar to the FTP (http://www.vguitarforums.com/smf/index.php?topic=8413.msg122194#msg122194) and connected it to a GK1. I replaced the non-working parts of the GK1 and then connected my box to where the GK1 pickup would be.


 

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