astatic 600 mod meter advice..

[Splash1]

dont have a clue how to use the modulation meter on this unit..

 

[Moleculo]

I used to have one of those meters a looooooong time ago.


A.M. Modulation Check

1. Operate MOD SET Control Switch to SET position.
2. Turn MOD RF Level Control to Min.
3. Key transmitter and turn MOD RF Level Control
clockwise to give a full scale meter reading to Set on the
Modulation Meter
4. Operate MOD SET Control Switch to MOD
position. Key transmitter and talk or steadily whistle into the
microphone. Read Modulation percentage directly on the
modulation meter
NOTE: A.M. modulation check functions must be performed
on each wattage range, to prevent possible damage to the​

meter movements.


You probably won't find a manual online for that meter, but you can use the manual for the Dosy. They're basically the same meter:

http://www.dosy.com/pdf/tc3001.pdf

 

[Beetle]

I used to have one of those meters a looooooong time ago.


A.M. Modulation Check

1. Operate MOD SET Control Switch to SET position.
2. Turn MOD RF Level Control to Min.
3. Key transmitter and turn MOD RF Level Control
clockwise to give a full scale meter reading to Set on the
Modulation Meter
4. Operate MOD SET Control Switch to MOD
position. Key transmitter and talk or steadily whistle into the
microphone. Read Modulation percentage directly on the
modulation meter
NOTE: A.M. modulation check functions must be performed
on each wattage range, to prevent possible damage to the​

meter movements.


You probably won't find a manual online for that meter, but you can use the manual for the Dosy. They're basically the same meter:

http://www.dosy.com/pdf/tc3001.pdf

There's that silly note about doing the checks on "each wattage range" again. I'm pretty sure it means to start on the highest "wattage range" and work your way down, if necessary, to get a reading within the meter scale.

ON EDIT: Yep. The Dosy link shows:

"NOTE: If power output is uncertain, use the highest range
and work down until the range is appropriate to prevent​

possible damage to the meter movement."

...for the wattmeter function. It lapses into the "each wattage range" for the other functions.