Treg'rs. I have Bowmar Return Loss Measuring Set, Model 481A. Can anyone give me an idea where I might obtain a copyof Operators Manual and/or a service manual for this device? I've tried contacting Bowmar in Acton, Mass,where it was built, but they are no longer there.
I purchased it a year ago for a low price and it does not look like it was ever used. I can use it in all modes except with an external complex impedance and external oscillator. It would be very nice to use it in these modes to confirm the calculated return loss measurements of the DAA's I'm designing for various countries. Thank you in advance. Regards, Duane
