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JOHNSON VIKING VALIANT TRANSMITTER
E. F. Johnson Model Number: 240-104
Over the years Woody has owned three of these great transmitters.
Woody has owned this particular rig since the spring of 1997.
RF output into an MFJ dummy load via a digital wattmeter shows about xx-watts.
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Built for perhaps six years: 1956 through 1962
the EF Johnson Viking Valiant transmitter
became one of the leading radio transmitters of it's era.
It came in factory-wired or kit-form.
Factory-wired transmitters have riveted in tube sockets.
Kit-form transmitters have screw and nuts securing the tube sockets.
Johnson Viking Valiant
Bands: 160 - 10 Meters
Input Power: 200W-AM, 275W-CW
Final Tubes: Three 6146b in parallel
There are 18-tubes in this rig including:
6AU6 6CL6 5763 6146 6146 6146 6AQ5
12AU7 12AX7 6AL5 6C4 12AU7 6146 6146
6BY5GA 5V4 866A 866A 0A2 0C3 0C3
Modulator: Two 6146b in push-pull
New Price: $349.50 kit and $439.50 wired
Manufactured between 1956-1962
Size: 11.5"h x 21.0"w x 16.25"d
Approx. Weight: 73 lbs
Johnson Valiant PDF Schematic (6.27 MB)
EF Johnson 1957 Color Sales Flyer (7.44 MB)
There are High Voltages with enough punch to easily kill you
exposed all over inside these old rigs
both above and below the chassis.
The capacitors can hold a lethal charge
well after voltage is turned off and the rig is unplugged.
Make sure to bleed off capacitors with an insulated and grounded screw driver
before touching anything
even after the unit is physically unplugged from the AC outlet.
Remember the old ham radio and electronics practice...
Work on the radio one handed leaving one hand behind your back.
If you have both hands inside the unit and accidentally touch a lead or brush a capacitor
current could potentially pass through your body and stop your heart.
Always instruct others to turn off the circuit breaker
or unplug the radio
before touching you if you are bit else they might be electrocuted, too.
OTHER RELATED JOHNSON VALIANT WEB PAGES:
N2AWA Valiant Restoration Page
An excellent technical tutorial of the Johnson Viking Valiant Transmitter
Tutorial on How To Tune Up the Johnson Viking Valiant Transmitter
Since 5 April, 2013:
All personal materials, comments, pictures copyright 1997-2013 R Linwood (4L RANCH)