Lexicon Effects Processor Potentiometers

[r2d2]

Hello

need help about get potentiometer spares for a Lexicon Alex
the pots are :

- Input
- Mix
- Output
images about on the next posts , check about.

any help is welcome
Thanks in advance
R.
(just contacted Lexicon that don't give support for discontinued products .... as Gyraf say "don't let Harman run your company"...)

 

[r2d2]

image 1
(click for enlarge)

 

[r2d2]

image 2
(click for enlarge)

 

[r2d2]

ok
2 X 50K each
1 X 10K

all double deck

question : are they linear , log, antilog , etc... ?

more thanks in advance
r.

 

[pvision]

The pots are marked on the back - the suffix (B, etc) shows the law

The input & output pots are not a problem but the mix pot may be impossible to find. From memory it's a dual-gang 10K log / antilog pot.  The pots are smaller than most you find and the front panel mounting holes are smaller than those for current pots from most manufacturers. Also the range of operation (in degrees of rotation) is different so the end stops don't line up

The encoders on most Lexicons of this era are prone to failure as well..


Edit:

I looked out the info I assembled for an LXP-5. The descriptions are from the parts list from the Lexicon manual


POTS
1 POT RTY PC 50KBX2 6MM FLAT 16MM
2 POT RTY PC 50KAX2 6MM FLAT 16MM

ENCODERS
3 SW RTY BCD 16 POS


There is (or was) a disparity in pot nomenclature between Europe and the US but Omeg use the following:

Resistance Laws (Taper):

Linear: A
Non linear: B - Log (Audio) or C - Antilog (Reverse Audio)
Other laws: Please refer to Sales office


If anyone has suggestions for a suitable encoder for these devices I am all ears. It is, more than likely, a generic part and the physical mounting will decide whether it is suitable


Nick Froome