GK / Mag switch function.

Started by KeldAmpworks, April 17, 2014, 08:50:50 AM

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KeldAmpworks

Hi.

I want to experiment with an alternative cable to replace the 13 pin atari cable. Both legit and 'kenwood' style cables seem to die on me too often (6 months or so), so I'm trying DIY.

My idea is to use http://uk.farnell.com/jsp/search/productdetail.jsp?sku=1390183 and http://uk.farnell.com/jsp/search/productdetail.jsp?sku=1390178

Which are 12 pin connections.

I'm thinking of omitting the GK/MAG switch (pin 9). But I notice that the GK3 schematic has a resistive divider with a DC level on this pin. Its not present on the GK2 schem. What's it for?

I use GK2a and Graphtech ghost with a GR-55 currently, but I don't want to shut myself off from using GK3 internal in future.

Thanks guys!

Elantric

#1
QuoteI'm thinking of omitting the GK/MAG switch (pin 9). But I notice that the GK3 schematic has a resistive divider with a DC level on this pin. Its not present on the GK2 schem. What's it for?


Read here for details

GK-2 vs GK-3
https://www.vguitarforums.com/smf/index.php?topic=5605.0

and for alternate 13 pin cable ideas - read here
RMC PolyDrive install on a Dean ML
https://www.vguitarforums.com/smf/index.php?topic=6247.0





Suggest re-examine the idea of using less pins - the big problem with Roland Gk 13 pin cables is the fact there is only ONE common Ground connection for All Analog Ground reference, Digital Control Ground Reference and Cable RF shield- which is prone to failure

details here:
Roland GK 13 pin Cable Maintenance Tips.
https://www.vguitarforums.com/smf/index.php?topic=3132.0


KeldAmpworks

Thanks Elantric,

I've replied to the resistive question on one of the linked threads so that all useful info is together.

I actually looked at a hirose connector first, but theyre quite bulky compared to the neutrik offering.

I've had the GND go on one of my GK cables (the one that came with my first foray into 13pin - GK2a/GR33 combo). But it appeared to be a bit of a shoddy connection anyway. The others (2 right angle kenwood cables) have been faulty sig pins.

Do you not think that a properly Pb high temp soldered stranded connection and good strain relief should fix this GND reliability issue?

Elantric

#3
Quote
Do you not think that a properly Pb high temp soldered stranded connection and good strain relief should fix this GND reliability issue?
Many folks are using a Roland US-20 Switcher - then they modify the US-20 to reallocate Pin#9 as a separate Ground Pin - which improves the GK-13 cable reliability for live gigs dramatically. ( modify the GK-3  / GK-3B and tie Pin#9 to Ground, then Modify the US-20 GK Input jack's Pin#9 and tie to Ground, and then modify the US-20 GK Output jack Pin#9 as a "No Connect" open pin) Remember that only the GK-3 / GK-3B employ the use of Pin#9  - All other 13 pin pickups (RMC, Ghost,Yamaha, Axon)  Leave Pin #9 as a "no connect" and list the pin as "N.C. Spare".