10-11-2015, 07:29 PM
Hi gary , anything you have would be helpful , I did look at the 10 turn pots these look very good ( 361420867276) ebay , but if you do leave it
in the on position and forget it takes longer to wind it off more chance of damage to the meter , the other thing that worries me is when in the
off position would there still be any current affecting the ma reading , looks like the old pots lift the wiper from the track to make sure , apparently the mk1 don't test rec valves but ive none to try , the one mk2 I have has a neg grid pot that seems to go out off range you can adjust the pot for 5 volts but when you test it at 1 volt and 10 volts it a way bit out , I'm thinking this should just be the pot , and the second mk 2 is in better condition with just a sticky mu meter £100 to have it rebuilt , ive ordered an analogue mm to check further , the mk1 has three transformers and seems to be put together differently cheers for your help my email is phillydivon@gmail.com
thanks again phil.
in the on position and forget it takes longer to wind it off more chance of damage to the meter , the other thing that worries me is when in the
off position would there still be any current affecting the ma reading , looks like the old pots lift the wiper from the track to make sure , apparently the mk1 don't test rec valves but ive none to try , the one mk2 I have has a neg grid pot that seems to go out off range you can adjust the pot for 5 volts but when you test it at 1 volt and 10 volts it a way bit out , I'm thinking this should just be the pot , and the second mk 2 is in better condition with just a sticky mu meter £100 to have it rebuilt , ive ordered an analogue mm to check further , the mk1 has three transformers and seems to be put together differently cheers for your help my email is phillydivon@gmail.com
thanks again phil.
