04-09-2015, 04:18 PM
UPDATE:
I went to Maplins yesterday and bought a potentiometer. I was surprised it wasn't expensive at all. One guy was clueless as to what a 500 K Pot is so I tactfully helped him to find out what was in stock.The only one that came close was a 470 K, single gang breaker and potentiometer at 400 volts DC tolerance. It wasn't totally sure it would be O.K. but it was only £3.50 and I just bought it. It really ought to say double gang??
Soon as I got home, I tested resistances between the power supply points in on and off positions. So, if I were to connect the 2 transformer leads to two tabs and two mains leads to the two other tabs, the circuit would close on switch on. In "off" there was no circuit between either of the transformer leads and either of the live or neutral mains leads. I always tend to pull the plug anyway.
Not sure how to accommodate the screened leads. I am aware what's needed is a bias on the double diode grid which I now located. I tested the Ohms up to 470 K on the pot and all was well. All in all, it seems an easier job that I imagined.
Again, this is a much more difficult set to work on than a GEC. It's less spaced out and far more cramped.
I went to Maplins yesterday and bought a potentiometer. I was surprised it wasn't expensive at all. One guy was clueless as to what a 500 K Pot is so I tactfully helped him to find out what was in stock.The only one that came close was a 470 K, single gang breaker and potentiometer at 400 volts DC tolerance. It wasn't totally sure it would be O.K. but it was only £3.50 and I just bought it. It really ought to say double gang??
Soon as I got home, I tested resistances between the power supply points in on and off positions. So, if I were to connect the 2 transformer leads to two tabs and two mains leads to the two other tabs, the circuit would close on switch on. In "off" there was no circuit between either of the transformer leads and either of the live or neutral mains leads. I always tend to pull the plug anyway.
Not sure how to accommodate the screened leads. I am aware what's needed is a bias on the double diode grid which I now located. I tested the Ohms up to 470 K on the pot and all was well. All in all, it seems an easier job that I imagined.
Again, this is a much more difficult set to work on than a GEC. It's less spaced out and far more cramped.
