Photos
of a JRC commercial transmitter after being reconditioned.
550 khz - 30 mhz continuous auto tuning.
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JRC
- Fully restored complete with spares, manuals and diagrams
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Front
of unit with RF deck door open and exciter draws open - With draws and doors
open no HT can be turned on
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Two
large variable inductors and knife switches that switch in the capacitors
- 100 watt driver - right side
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Front
panels removed - left - main circuit breakers and contactors - right - Screen,
grid & control power supplies
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The
1 horsepower 3 phase blower next to the 3 phase HT transformer - Note the
air operated mercury switch to protect tube
Full
manual for the JRC Transmitter (19MB file)
Specs
Power
output level settings - 5kw, 2.5kw & 500 watts SSB output
8F75R
tube
HT
9KV @ 4 amps
Filaments
7V @ 64 amps
Drive
power 150, 50 & 15 watts
3
Phase power @ 60 amps per phase
1.6
mhz to 30 mhz continuous coverage
Memory
tune between .55 mhz to 30 mhz
Full
linearity control & processing
Full
limiting and over drive ALC
Can
be used on SSB, CW, Data & AM
The
tube is capable of 30KW PEP
.
The
unit has been reconditioned,
It
has been tested on a dummy load.
It
can also be used as a tube test jig
It
is not currently in service
Mainland
Broadcasting Technical Dept