Palomar 500 meter
 

Does anyone know how to calibrate this meter. There are three
adjustments on the back, (10w, 100w, and 1000w).

Rocky

Does anyone know how to calibrate this meter. There are three
adjustments on the back, (10w, 100w, and 1000w)

Rocky-

What is a Palomar 500 Meter? If it is an RF power meter, then you appear to
have answered your own question.

If you are asking for a way to use those adjustments, you obviously need an
accurate power meter or standard, an RF power source and a dummy load good for
the maximum power.

Do you have an oscilloscope with a built-in calibrator? If you know its rated
bandwidth, you can use it to measure the voltage of a somewhat lower frequency
signal, to sufficient accuracy to be within about a dB. If the scope is DC
coupled, you could use a DC voltage to calibrate it against an accurate DC
voltmeter.

Then, the scope would be connected by a short cable to the dummy load using a
co-ax "T". As long as you stay below the scope's upper frequency limit,
measurements should be accurate. Just remember that you are looking at
peak-to-peak voltage, which is 2.83 times the RMS value.

73, Fred, K4DII

Does anyone know how to calibrate this meter. There are three
adjustments on the back, (10w, 100w, and 1000w)

Rocky-

What is a Palomar 500 Meter? If it is an RF power meter, then you appear to
have answered your own question.

If you are asking for a way to use those adjustments, you obviously need an
accurate power meter or standard, an RF power source and a dummy load good for
the maximum power.

Do you have an oscilloscope with a built-in calibrator? If you know its rated
bandwidth, you can use it to measure the voltage of a somewhat lower frequency
signal, to sufficient accuracy to be within about a dB. If the scope is DC
coupled, you could use a DC voltage to calibrate it against an accurate DC
voltmeter.

Then, the scope would be connected by a short cable to the dummy load using a
co-ax "T". As long as you stay below the scope's upper frequency limit,
measurements should be accurate. Just remember that you are looking at
peak-to-peak voltage, which is 2.83 times the RMS value.

73, Fred, K4DII

Does anyone know how to calibrate this meter. There are three
adjustments on the back, (10w, 100w, and 1000w)

Rocky-

What is a Palomar 500 Meter? If it is an RF power meter, then you appear to
have answered your own question.

If you are asking for a way to use those adjustments, you obviously need an
accurate power meter or standard, an RF power source and a dummy load good for
the maximum power.

Do you have an oscilloscope with a built-in calibrator? If you know its rated
bandwidth, you can use it to measure the voltage of a somewhat lower frequency
signal, to sufficient accuracy to be within about a dB. If the scope is DC
coupled, you could use a DC voltage to calibrate it against an accurate DC
voltmeter.

Then, the scope would be connected by a short cable to the dummy load using a
co-ax "T". As long as you stay below the scope's upper frequency limit,
measurements should be accurate. Just remember that you are looking at
peak-to-peak voltage, which is 2.83 times the RMS value.

73, Fred, K4DII