NettetThe advertisement refers to Catalog #724 which is available in .PDF format below. This file contains the 5 pages of the Johnson Catalog #724 for the 1954 Ranger mentioned in the 1954 QST magazine … NettetThe EFJ is pretty easy to power with its low power requirement and built in VR tube. If you want to stay with a tube type power supply then for inspiration take a look at the Knight …
A Digital VFO for Vintage Transmitters - Main Page and Exterior …
NettetThe Johnson Viking Rangerby Greg Latta, AA8VCrystal Oscillator Schematic Diagram and Circuit Description. Click here for a higher resolution (larger) schematic. This circuit can function as either a … Nettet2. jun. 2002 · This is an outstanding VFO topology. __ VFO Buffer - In the first design of the receiver, this buffer was used with an FET VFO oscillator followed by a filter and a 2N5109 amplifier. __ Designed by Web David White, WN5Y. VFO from 2001 ARRL Handbook 4.20 - Schematic only __ Designed by Jim Osburn, WD9EYB morning wendy
Siltronix VFO, boosting the drive level. WorldwideDX Radio …
NettetThe Johnson Cherynobyl Resistor. The Johnson Cherynobyl Resistor. - OR -. Fixing the VFO 18K screen resistor (122, Valiant, Ranger, Pacemaker and other) In the Ranger and Valiant, the over heated 18K carbon resistor will eventually fail. With today's higher line voltages and aging equipment operated near its maximum ratings it is inevitable. NettetThis compact Transmitter gives you outstanding flexibility and performance , . . power to punch through terrific QRM! Built-in VFO or crystal controlled, the "Valiant" is completely bandswitching on all amateur bands J6G through 10 meters . . , delivers a full 275 watts input on CW and SS8 [with an auxiliary SSB exciter) and 200 watts on AM ... NettetBelow are links to the only correct schematic for the Johnson 250-122 VFO. It includes R55 (22 ohms) directly at the grid of the 6AU6 oscillator tube to stop VHF oscillation … morning whisker warriors