Hi Dave,
Your conversions look good.
That said, I would not operate your 10W transmitter with the 20dB pad into the SA44B. +20dBm is a hard limit. I would add another 10-20dB of attenuation as well. I would try to stay below +10 dBm, the SA44B goes into 1dB compression at about 16dBm for some frequencies.
We also sell an RF limiter you might be interested in, the VLM-63-2W-S+. If you knock the input down to +10 and then add this +12dBm limiter to the front end, I think you would be safe from costly front end RF damage.
Regards,
Andrew
