[HAM] Key contact resistance wire availability

[Kon Zissis]

On 1/3/07, David Wells <dwells1970 at hotmail.com
<http://www.zeni.net/cgi-bin/mailman/listinfo/hammond> > wrote:
> Lads is it possible to get that stuff by the spool? I'm only adding
the
> highest tones ,..so I'll  need only one grade of wire...yes?
> Can someone remember off-hand the specs of that wire?
 
Brad Baker replied :
>You can use fixed resistors and standard mag wire for these
>connections. Somewhere I have the manual tapering resistances, sent to
>me by ? (Don, Kon, Mike).
 
Hi Brad and David.
I sent you the  tapering resistances as part of the TG & Tapering data
spreadsheet. Mike Fulk has also created and posted on to the internet a
manual tapering diagram called "Standard Manual Keycircuit Tapering" 
Most of the console organs including the BC organs  with serial numbers
above 5075 , the later era D , the later era E organs with serial
numbers above 8000  , the BV , CV , G , B2 , C2 , B3 , C3, A100 , RT3 .
D-152 etc all had  the manual tapering scheme.
 The Model A and the earlier  BC organs with serial numbers below  5075
, the Model D , and the earlier Model E organs with serial numbers below
8000 as well as all the spinets and a few late era  console organs such
as the R-100 series and I think also the H-100 series and perhaps also
the X77  did not have the manual tapering scheme  but instead they all
had 16 ohms resistance wires in the manuals . 
For the organs that do not have  the manual tapering scheme  you can use
normal wire  with 16 ohms resistors soldered  on to one end in order to
add the additional TG notes 92 to 96.
 
For the organs that do have the manual tapering scheme  the following
resistance ohms values apply: 
The final keyboard note on the 2 2/3 drawbar can be the TG note 92 with
a 50 ohms resistance.
The TG notes 92 to 96 added to the  last octave of the manuals with the
2 ft drawbar , the 1 3/5 drawbar and the 1 1/3  drawbar can  have 34
ohms resistances.
The 1 ft drawbar  used 24 ohms resistance wires for the TG notes 85 to
91 on the second last ( fourth ) octave of the manuals and 50 ohms
resistance wires  on the last ( fifth ) octave  of the manuals. The TG
notes 92 to 96 will be repeated  on the fourth octave and the fifth
octave of the manuals with the 1 ft drawbar so therefore you can use 24
ohms resistances  on the fourth octave and 50 ohms resistances on the
fifth octave of the manuals.
 
All the best.
Kon