Stupid problem on my new Mark IV ...

[Dror520]

the lead drive knob doesn't have a end to the turning .... in other words i cant know when it's at 0 and when it is on 10 because when i'm turning to knob it doesn't stop at 0 and at 10 i can just keep turning it ... what can i do about it ?

 

[trem]

Does it feel loose? If yes, pull the knob off to reveal the shaft of the potentiometer. There should be a nut in front of the potentiometer. Tighten it up.

EDIT: DOH! It may be not as complicated as I thought it was. The knob itself maybe loose. There's a small screw on the side of the knob. Tighten that up.

 

[Dror520]

Thx again trem u r very helpful !!! the problem was the knob ... i Tighten it up and now it stops ... but the zero is 7 and 10 is 5 ...
how can i change that ? thx again !!!

 

[metalmm785]

Try loosening it up and realigning it to stop at 0.

 

[6L6C]

You might want to pull the chassis so you can grab the pot and hold it still while your tightening it down

 

[trem]

With the knob off, turn the pot shaft completely counterclockwise. Now position the knob on the shaft with 0 on top, then tighten up the knob. You're welcome.

 

[Dror520]

thx !!! you are very nice !!!