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ChrisG ChrisG is offline
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Default Does Anyone have a Schematic for a Sound City Joanna PianoKeyboard?

On 5/13/2019 6:03 AM, Paul wrote:
On 5/13/2019 3:48 AM, Paul wrote:
On 5/12/2019 3:16 AM, Paul wrote:
Mine looks just like this one:

Â*Â*Â*Â* https://www.matrixsynth.com/2017/07/...ty-joanna.html

The power switch LED turns on, but nothing on the output.

A schematic would sure be helpful....


Â*Â*Â* Oh, nevermind.Â* It works.

I used to successfully employ heavy guitar strings on Farfisa and Vox
organs. They would need to be wound with a metal that could be soldered
though, bronze maybe? I later learned that the original busbars and
springs on better quality instruments were often gold plated, so I
probably caused a lot of destructive wear and tear, but I didnt know
and didnt care in those days. I just wanted the thing to work when I
needed it.
Everything corrodes, but gold on gold is pretty good until it wears
through. If theyre gold, it may be worth transplanting old springs from
the upper keys to the midrange to preserve the busbar, and kludge the
lesser-used contacts.


Â*Â*Â* I just need to clean the key springs, and buy new ones
for the ones that are missing.

Â*Â*Â* But a weird sounding keyboard for sure!Â* Nothing like
that old Italian analog sound!


Â*Â* Ok, can I just go to somewhere like Home Depot, and
get stock spring, to replace the old, worn out key
springs?Â* Like get a long length of it, and cut them
to size?

Â*Â* Here is a picture of similar Crumar key springs:


https://xbs111.files.wordpress.com/2...-springs-2.jpg


Â*Â* Thanks for any advice.