27-11-2016, 05:41 PM
To use the meter, you turn the mA/V control to the gm from the valve data book. The Set Zero control on the other side is then turned until the needle goes onto zero. To test the valve, the central "joystick" is pushed to the left, and the needle goes up to indicate the condition of the valve. Push it the other way and it indicates the cathode insulation.
So why do they have mA/V write on the scale?
When I got it, the needle was off zero, as you state, and could not be corrected by the manual control on the front. I took the movement out and found the needle was bent. I straightened it out (in fear and trembling) and put it back. It now rests exactly on zero!
Bob
So why do they have mA/V write on the scale?
When I got it, the needle was off zero, as you state, and could not be corrected by the manual control on the front. I took the movement out and found the needle was bent. I straightened it out (in fear and trembling) and put it back. It now rests exactly on zero!
Bob
