The B&W 850 and 850A inductors are designed for medium to high power
pi-net final amplifiers. They are designed for a plate load impedance
value from 2000 to 4000 ohms, which includes the 4-1000.
The inductances you have quoted are correct.
In a shunt fed circuit, the input cap C1 is 40-170 mmfd @10kv and the
load cap C2 is 1500 mmfd @2kv. RFChoke 1 on the B+ side is a B&W 800 or
equivalent and the protective RFChoke 2 is a 1MH @300 ma.
In a series fed circuit, the input cap C1 is 40-170 mmfd @20kv and the
load cap C2 is 1500 mmfd @10kv. Choke values remain the same.
Hope this helps, if you need the data sheet I can scan it and email it
Bob - K8NY
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