[Amps] Radio Shack MTA-20 power meter

[Martin Sole]

I have seen this meter mentioned on here a couple of times before but 
cannot locate any information. The user manual talks about calibration 
and the need for 'special equipment' and the procedure being in the 
service manual. Did anybody on here ever see a service manual for this 
product or know what the calibration procedure involves.

I do like this meter, it shows I have more power than some of my other 
meters!

Thanks
Martin, HS0ZED