Keydown weights Nord etc.

The Nord Electro 6D has a Fatar TP/80 keybed which is the same as organs like the Mojo 61. However, I was surprised at how stiff the action was. I ended up swapping the key springs with an M-Audio Keystation 61-ES. I think this might use the Fatar TP/9 synth keybed.

That reduced the Keydown by 10g - not huge but it feels a lot better for smears etc.

The Prophet 6 uses a variant of the TP/9

There has been much interest in the UB-Xa and some people are unhappy with the lightness of the keyboard so here are my unscientific results:

Model	No 1ps 3.56g	Weight in grams needed to move key from rest	White Key Length mm	C-C 1 octave mm
Nord E6D	15p	53		To the LH edge of the C key
Prophet 6	14p	49	136	164
UB-Xa	8p	29	136	164
Behringer Odyssey	6p	21	138	164

So the Electro with new springs is very close to the Prophet 6 but the UB-Xa is 20g lighter than the P6. It would definitely be worth replacing the springs if they are the same size as Fatars.