VGuitar Forums

GK-13 Reference Knowledge => GK Mag Hex (GK-2A,GK-3) => Topic started by: tjinca1 on August 06, 2008, 12:22:34 PM

Title: What's the difference between a GK2 and GK3 pickup?
Post by: tjinca1 on August 06, 2008, 12:22:34 PM
I've been searching for a roland ready guitar for my VG88, and I see some guitars have the GK2 pickup, where on my current guitar I have the GK3 taped on.  What is the difference between the pickups? 
Title: Re: What's the difference between a GK2 and GK3 pickup?
Post by: Brent Flash on August 06, 2008, 12:26:21 PM
The GK-3 has an adjustable radius. That's about it.
Title: Re: What's the difference between a GK2 and GK3 pickup?
Post by: Schnitz on August 06, 2008, 12:32:59 PM
What's the radius on the GK2?
Title: Re: What's the difference between a GK2 and GK3 pickup?
Post by: Brent Flash on August 06, 2008, 12:46:00 PM
Quote from: Schnitz on August 06, 2008, 12:32:59 PM
What's the radius on the GK2?
I don't know but it is used on this guitar that has a 9.5 inch Radius.

Roland Ready Standard Strat Specifications

Series : Standard Series
Colors :
(306) Black,
(332)* Brown Sunburst add $50.00,
(380) Arctic White, (Polyester Finish)
Body : Alder
Neck : Maple, Modern C Shape, (Satin Polyurethane Finish)
Fingerboard : Rosewood, 9.5 inch Radius (241mm)
Number of Frets : 21 Medium Jumbo
Pickups:
3 Standard Single-Coil Pickups (Ceramic Magnets),
1 Special Design Roland GK-2 Synth Pickup
Title: Re: What's the difference between a GK2 and GK3 pickup?
Post by: vanceg on August 06, 2008, 01:24:49 PM
I don't know what the specific radius is on the GK-2, but I happen to own 4 of them and I use them with great success on a Strat, A Baritone set up a lot like a Jazzmaster, a LesPaul Recording (1970's), and a Honer Steinberger copy.  Using the sensitivity settings I can get the GK-2 to work pretty much everywhere.

Vance
Title: Re: What's the difference between a GK2 and GK3 pickup?
Post by: joerobot on September 07, 2015, 01:46:19 PM
I am hoping to make a 13 pin - 5 pin MIDI multiplexer for my Roland GK-2A pickup, but can't find the right electrical specifications. Looking at the pinout of the Roland 13 pin DIN connector I see that it requires a +/-7V voltage supply.

1) What is a typical current draw of the GK-2?
2) Any ideas for a component that can deliver these requirements? I'm looking at the LT3032..

Thanks
Title: Re: What's the difference between a GK2 and GK3 pickup?
Post by: admin on September 07, 2015, 09:11:04 PM
Schematics
https://www.vguitarforums.com/smf/index.php?topic=73.0 (https://www.vguitarforums.com/smf/index.php?topic=73.0)

Dimensions
https://www.vguitarforums.com/smf/index.php?action=downloads;sa=view;down=41
https://www.vguitarforums.com/smf/index.php?action=downloads;sa=downfile&id=41
(https://www.vguitarforums.com/smf/proxy.php?request=http%3A%2F%2Fwww.snapagogo.com%2Fuploads%2Fsource%2F2822013%2F1381423482_388838483_Mag_Hex_Measurements_zps72792ce4.png&hash=a14a345e85efe163e7728eda6510dfc0322b6489)

The GK-3 has Adjustable Radius, and lower output signal, and transmits a Control voltage on Pin #8 based on the current position of the three way Guitar / Mix / Synth switch.
Title: Re: What's the difference between a GK2 and GK3 pickup?
Post by: joerobot on September 12, 2015, 05:41:22 AM
Thanks for the response.

From Elantric's post, it looks like LM317 and LM337 are a good choice for the voltage regulators.

I couldn't find any information on a typical current draw though? It would be nice to find this out if I eventually move on to powering the unit with batteries. (Admittedly I could measure it myself but I am working with a very minimal setup and not very good equipment)

Thanks
Joe