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Incognito rewire problem

I have installed the Incognito tonearm rewire on a RB 250 Rega arm with the Origin structural mod.There seems to be an earthing problem as I have a continuous and loudish background hum not present at all previously.Checked the wires in the tonearm and base,they are not broken.Could it be the cartridge? A Sumiko Pearl that now hums when near the Planar 2 motor.Thanks,any help appreciated.stefanl
stefanl
reb1208
518 posts
 
Did you not keep the internal ground wire that was connected at the stub threads. I assure that you are not the first to have this problem with the incognito. Look, I'm sorry to tell you but that kit was the "wrong" move.
stefanl OP
296 posts
 
I have sent the arm back to the dealer and he says he will either repair or use another kit that he has available.I had the elec. continuity checked and there was nothing coming from the blue and white wires in the left channel.This is strange as I was getting signals in both channels but incredibly bad interference also so I will wait and see.
reb1208
518 posts
 
Very bad idea to take that arm apart once yet alone a second time. I can tell you that your arm will most definitely suffer some bearing play from all the handling. You will hear distortion and sibilance in the highs. Been their- done that. I would ask for a new arm and send it to Joe at discovery cable.
stefanl OP
296 posts
 
I believe that installation of the Incognito kit is different for the RB 250 than other arms in the Rega series.You don't have to take it apart just remove the end stub and the base,thread wire through and fix in new base and replace stub.It should be O.K.I am dubious about the wiring itself though, as it was humming like crazy when the tonearm passed over the motor.
reb1208
518 posts
 
Hope the end stub comes off easy on the 250. Because on the 300/600/900/1000 - most of them are glued on very tightly. I don't trust anyone unscrewing those subs w/out putting pressure on the arm. The incognito is a bad design- period.
Best of luck to you.
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