the 'in' position is the calibration position. you press it in, turn the
knob to set the needle to the right side south stop, then release the
button. some models had a knob that locked in the 'in' position so you
pressed it in and released it to engage the calibrate circuit then pressed
again and released to turn it off.

"Dick, AA5VU" wrote in message
...
I am having fits with my old Ham IV control head readings. The controls
(CCW and CW) work but the meter is flakey. I tried the Cal procedure int
he manual but that does not seem to work.

Regarding the manual is is useless on the purpose of the Calibrate
control. I know it has an IN and OUT position and should be used to set
the meter in the full CW postion.

What is the 'In' position and what is the 'Out' position?

It does not seem to have a great deal of control over the needle. The
needles seem to like staying in the far right South postion.

Help!

Dick - AA5VU