Hammond XK3 direct keyboard connection

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Re: Hammond XK3 direct keyboard connection

von happyfreddy » 29. Apr 2021, 12:23

@christian
perhaps it will be the same configuration as at FATAR 6 octave keys.
The rubber contact boards just begin with their matrix at lowest key -
anyway if this is a negative preset key or normal key..
In my HX 3 in B3 look I used such 6 octave FATAR keys and it was necessary to use
for the HX 3 keys 5 octave rubbercontact boards an a separate 1 octave rest
for the preset keys.

I expect at the HAMMOND XB key that because there is a 16 pol and 20 pol plug
that the rubbercontacts just begin at lowest key of the 6 octave keyboard

The used FATAR Keys in HX 3 have only two 16 pol plugs to connect the 61 dynamic rubber contacts.
For the XB Key with 20 + 16 = 36 plug pins for 72 keys this will mean that only 4 pins are reserved for the
12 preset keys.
That makes no sin so her we will have a other configuration of the matrix.

Easiest way just post a pic from the XB keys how it´s made there with the matrix ...

Re: Hammond XK3 direct keyboard connection

von Christian » 29. Apr 2021, 11:28

Paul, do you also have access to a schematic of the XB-5 keyboard matrix? If it is the same matrix, we may have a solution. The inverse keys must be separated anyway and wired to a Preset12-2 or an Extend16 board, the latter allowing to use four more digital inputs for switches or buttons.

Re: Hammond XK3 direct keyboard connection

von happyfreddy » 20. Apr 2021, 13:17

If You want to use this control properly the polarity of the diodes !!!
I know that the same Fatar keys used in VISCOUNT drawbar Organs have opposite
polarity of the diodes !!

If You use Hammond Suzuki keys You have to buildt up a interface corresponding to
the micromatch plugs and their number of pins

Re: Hammond XK3 direct keyboard connection

von clp560 » 20. Apr 2021, 11:57

One final question before I go the Fatar keyboards route — I found the Hammond-Suzuki XK3 keyboards matrix diagram (the lower keyboard is the same). Is it possible this could attach to the Fatar scan board? The first connector is 16-pin but the second connector is 20-pin presumably because of the preset keys. Possible or should I give up the idea?

Paul

Re: Hammond XK3 direct keyboard connection

von happyfreddy » 29. Sep 2016, 15:49

There is no way to connect any keyboard directly to HX3 mainboard.
For using FATAR keys You need the FATARscan2 board, which supports two keyboards ( upper and lower manual )

If any other key with simple contacts You can use the normal scanboards like Scan61-inline.

Only in case of SAME MATRIX and Connections of named XK3 Hammond keys You can try it at own risk.
We don´t know how these keys are constructed

Hammond XK3 direct keyboard connection

von clp560 » 29. Sep 2016, 15:00

Is it possible to directly connect the Hammond-Suzuki XK3 keyboards to the HX3 instead of using midi? Is there a latency difference i.e. faster without midi?

Paul

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