[Premium-Rx] WJ 796216 VHF-UHF Preselectors for sale
Terry O'
watkins-johnson at terryo.org
Fri Nov 2 10:52:51 EDT 2018
I'd like to sell four Watkins-Johnson 796216 voltage tuned 20-1000 MHz
preselector modules. They are voltage switched and tuned. These were
front end modules for SIGINT surveillance receiving systems developed
for Iran and Germany. They come from the estate of the lead engineer at
WJ for the German iteration of this system (WJ-9049).
They are five band units, each band with a separate SMA input and a
common SMA output through the attached K&L Microwave 1 GHz low pass
filter. Bands are controlled by +15 / -15 VDC. The bands are:
Low Band 1 - 20-50 MHz
Low Band 2 - 50-125 MHz
High Band 3 - 125-250 MHz
High Band 4 - 250-500 MHz
High Band 5 - 500-1000 MHz
The low and high bands have separate tuning control voltage inputs and
both are tuned linearly with 2-28 VDC.
Two modules are missing the metal side plates. The other two are
complete. I'd like $100 each for the complete units and $60 each for
the ones without side panels. I will supply the schematic, block
diagram and operation description from the WJ system manual with each
module. Shipping by USPS Priority medium boxes ($13.65). This box could
handle up to four modules.
Photos and more information upon request.
Thanks for reading,
Terry O'
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