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Question about changing a GA3 to an F-100

Hello, I recently got a GA3 and after looking at it closely and comparing it is the "console version". the F-100, I was wondering if it would pe possible to change out the keyboards to 2 61-note manuals and change the 2 cheek case pieces? It would total…

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Question about changing a GA3 to an F-100

kiaya611

kiaya611
United States

Total Posts: 5
Joined: December 7, 2017

Hello, I recently got a GA3 and after looking at it closely and comparing it is the "console version". the F-100, I was wondering if it would pe possible to change out the keyboards to 2 61-note manuals and change the 2 cheek case pieces? It would totally fit, but I wonder if Technics made the "guts" generic to cover a few different models? The G-100C looks virtuall identical to the GA3 and the button and inside measurements fo the GA3 and F-100 are the same. I have a Yamaha FX-20 that has a ton of extra connectors inside that don't go to anything on that model and wonder if it was cheaper to made one "insides" to fit a few different models? Here is a (donw and dirty) "Photoshopped" GA3 with 2 61-note manuals and also a page out of the GA3 service manual showing the cheek pieces that would need to be changed to the ones the F-100 uses. Your thoughts... Thank you, Steven

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Posted on December 16, 2017 at 4:03 PM
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4 Replies

kiaya611

kiaya611
United States

Total Posts: 5
Joined: December 7, 2017

Re: Question about changing a GA3 to an F-100

It would make a really neat compact F-100 (less the pedals (which might even be able to be changed), but that would take up room real estate and I don't have the space.

Posted on December 16, 2017 at 4:06 PM

davetutt

davetutt
United Kingdom

Total Posts: 160
Joined: January 12, 2015

Re: Question about changing a GA3 to an F-100

Hi

Yes I think it can be done. My friend Lynne is the expert in this as she has plenty of the machines to work with.

Yes the box will take the keys. Main concern is the voice board. I'll check with Lynne and let you know. I have a feeling we discussed this only a couple of months back and that the machine was consequently shipped out of the UK.

Update ASAP!

Dave

Posted on December 16, 2017 at 5:45 PM

kiaya611

kiaya611
United States

Total Posts: 5
Joined: December 7, 2017

Re: Question about changing a GA3 to an F-100

Hi Dave,

That would be great! It is an interesting idea to get a compact F-100 (effectively). I just noticed that so much looked identical between the GA3, F-100 and G-100C that it made me wonder if Technics used the same (or virtually the same) insides for these organs. The 25 pedals would be a great inclusion, but the space it would take up would be problematic, unless they were cut down to be short like the GA3's pedalboard. Something that could be done, but I usually don't like cutting things up, if I can find purpose-built parts that will work.

Posted on December 16, 2017 at 6:14 PM

davetutt

davetutt
United Kingdom

Total Posts: 160
Joined: January 12, 2015

Re: Question about changing a GA3 to an F-100

The Technics from this range are all very similar. Lynne and I have spent quite a lot of time fixing them over the years. Lynne sells all makes of organs so we have an on going saga of these sort of things. Much of our time is spent reverse engineering and trying to figure out the hows and the whys before we find a suitable solution to the problems. With no support from the manufacturers on most organs it is a great shame that these sometimes fantastic instruments will eventually all end up in landfill. Lynne and I intend to keep as many of these things running wherever possible!

As a guide, Technics used the same switching power circuit is almost all their synths / keyboards / organs / pianos and ensembles and they all suffer from the same faults some 20 years down the line.

Many of them used the same class D amplifier circuit which as proven to be extremely reliable.

The FA1, GA3 and several other machines used the same main logic / voice board although there are differences which preclude a straight swap over. There are also a couple of quirks that will cause issues with different versions of the firmware.

Regards

Dave

Posted on December 16, 2017 at 6:32 PM