[Radio1950]

Just going back to the original request.

Steve,
I cant help thinking that the info in posts #2 and #3 is most helpful for home cal at HF.


We still dont know what type of meter you have for cal??


If you want a very good paper on some of this, HP published this -

"Fundamentals of RF and Microwave Power Measurements
Application Note 64-1B".

And a few photos of my power meter and some 1960s Vintage gear-
1 - I calibrated this power meter with Sig Gen, CRO, HF TX.
2 - Inside a Vintage Tenco SWR meter
3 - Inside a Vintage Osker SWR200 meter.

Both the Tenco and Osker meters test at 20% power accuracy from 5-30 MHz, and are hopeless below 4 MHz as the line coupling is too low (too short a line).