Johnson vfo 122 manual

The way Johnson set it up, the screen voltage for the tube is regulated and connected directly to the 0A2 regulator which is fed by the B+ supply. If you are willing to change the value of R51 (the VR tube current limiting resistor) downward then you should be able to go as low as volts or so which is the recommended minimum "firing.  · Johnson Viking VFO Model I use the Latest Laser High Quality Printer. Instruction Manual. This Manual is Printed on 8 1/2" X 11". Reprint is from the scanned www.doorway.ru: Johnson Viking VFO Assembly Manual. This is the manuals page for Johnson. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. If you have some stuff that not is listed here you can donate this by contact www.doorway.ru Note that .

The manual states volts for B+. Has anyone experimented to find the lowest voltage the VFO will operate reliably with? Johnson VFO external power. EF JOHNSON MANUALS **All Manuals are copies and are made-to-order unless otherwise noted.** EF Johnson VFO VFO. Add (PUB) EFJ-VFO EF Johnson. Re: Johnson vfo help «Reply #22 on: Aug, PM» Hey Geoff, I'm in my 35ft fifth wheel in Rockmart Ga. you ought to see the viker II next to the NC station.

This is the manual page for Johnson. Here you will find instruction manuals, service manuals, user guides schematic, Viking VFO zip, Kbytes. You can use the original Viking VFO or a modern synthesized digital VFO for wider frequency Here are two extracts from the Johnson Viking II manual. Instruction Manual. 3 • The Variable Frequency Oscillator is patterned. a:fter the:famous JOhnson 1tt:>del. , employing a series tuned Colpitts circuit.