modded naim nac 92 -TKD motorised pot upgrade

[bazzweb]

Hi,
i got fed up with a manual pot so took the plunge with TKD 2cp-2511 motorised one instead and im VERY glad i did, this is one of those 'i wish id done it years ago moments ' not just from a convenience point of view but sound also, to me a staggering improvement over the Blue alps it replaces, greater clarity, tighter sound stage and a vice like grip on the bass also better replay of dynamics less 'shouty -aggressive'.I removed the IR sensor from the Glasshouse remote control module and mounted it in a separate box on flying leads as my amp is in a different room, the module works extremely well controlling the motor with gradual increments.Now im looking at that balance Pot ! any suggestions for a quality 10k non motorised balance pot please ?

 

[analog_sa]

I have not felt the need for a balance control over the last 35 years. It is probably there just to overcome the balance issues of the Alps volume, especially at low settings.

Have you considered the improvement bypassing/disabling it would bring?

 

[bazzweb]

Hi yes its worth a go, the only thing is i always seem to have it slightly panned to the right, not sure if its the room or my ears !,but i guess its replaced with a few resistors ? what value should they be ?

 

[Ian Finch]

There is a detailed explanation of the elements of balance controls here and elsewhere on the net - Google is your friend. This will give the requirements. The actual resistance values to substitute for the pot can simply be measured with a multimeter from either end to centre of the pot, for left and right channels with the power off. That is, the front and rear sections of the dual ganged pot. Substitute 1/4 Watt, nearest value, metal film resistors at these same pin locations, after the pot is removed. Absolute precision values are not necessary so choose standard E12 resistor values.

 

[PB2]

Nice work, I've been wanting to do this on a few preamps.