15-02-2017, 01:57 PM
Mike, I keep referring to 270° of rotation but it occurs to me that I'm wrong as that figure allows 30° for the switch operation of a switched pot which, of course, you don't have so 300° is the correct figure.
180° travel will correspond to 30k - to be accurate - but I suppose 25k is close enough under the circumstances!
In that case, the earlier graphs I produced will be suitable - just re-scale the horizontal axis from 270° to 180°.
As we don't know for certain exactly what law the original pot followed, I wonder if it would be a good idea to get the set working again without the extra resistor - just leave a pair of flying leads on the pot is access is awkward - and then try a variety of resistor values to see which one performs the best.
180° travel will correspond to 30k - to be accurate - but I suppose 25k is close enough under the circumstances!
In that case, the earlier graphs I produced will be suitable - just re-scale the horizontal axis from 270° to 180°.
As we don't know for certain exactly what law the original pot followed, I wonder if it would be a good idea to get the set working again without the extra resistor - just leave a pair of flying leads on the pot is access is awkward - and then try a variety of resistor values to see which one performs the best.
