Many thanks to both Chuck and Lynn on this one. He has a lot of experience with these particular radios and is willing to help out if needed. I had not noticed the retaining ring prior to his message. It is the best schematic diagram I have ever found for the standard Johnson Viking Ranger. When it is free simply take a pair of needle nose pliers and reset the ring by squeezing it. Discovered charred plate resistor wires under the chassis. This Viking I was purchased at a hamfest.
The 829B was cheap war surplus and was what Johnson used and recommended, I have the factory documentation on that change. Signal reports were all favorable. January 5, 2009 Monday : The Hy-Power 80 meter dipole antenna arrived. I touched it with a soldering iron for a temporary fix. Many people have problems getting accurate plate current and correct modulator current, as well as grid current.
The Viking has a non-original hole in the front panel. February 7, 2009 Saturday Erect 80 meter dipole antenna. Rewire the first three stages as shownin the schematic above. So, there it sat for roughly 20 years, until he offered it to me for 35 bucks. The normal operating plate current at full power mostly includes only plate and screen current.
The modulation issue did not seem to be tied to the loading caps, but the weakness of these original caps was good knowledge for future reference. Was able to hear the zero beat signal on all bands except 80 and 160. The tank coils looked much brighter afterwards, you'll agree. Parametric eq-Limiter combo The limiter detector was modified for asymetry 100% negative, 150% positive modulation 5. The operating manual can give important operating information that will allow the owner to get the most out of the equipment, and it is next to impossible to repair and restore a piece of equipment without the schematic diagram.
If it moves up or down too much, the ball bearings can fall out of the switch on the top side. I had read that it was desirable to slowly heat up a radio that had not been energized for years — maybe decades. Note that there is a limit to the number of files you can download. After straightening that out, I fired the rig up and it came to life nicely. They were both still white! This sounds fine and given the relatively low average power of speech its really quite efficient if a little low-tech. Feeding 3 of these transformers in parallel at the 52V winding and then hooking the 3 240V windings in series gave me about a 1:14 Voltage stepup with good frequency response from 40Hz-10kHz and very low distortion.
The three units would need 7 inches of rack space so I bought a pair of 7 inch rack rails from to hold them all together. If you leave it in this position and try to operate all the other bands, you will have major problems tuning the final dip and load etc. It appears to be close to original, no obvious mods or hacks. A cordless drill made a pilot hole for the insulator. The two types can be mixed in use. With a 40 meter crystal plugged in, the meter and a frequency counter were used to test the oscillator first and then the buffer. The receiver was deaf and drifted all over the place.
The front panel has what looks like very fine pock marks on the paint. Several of the guys tried to free up the band selector switch to no avail. There is probably no way to fix that other than a replacement tube. After some difficulty removing the knobs, I succeeded in removing the front panel. These recordings are made with a software defined radio.
It is working now and I have been enjoying it on the crystal controlled frequencies of 3. He said it sounded good. As much as I would love to have a new silk screened panel I am going to experiment with cleaning with some 0000 steel wool followed by a rubbing compound and then a paste wax. Attach dummy load Cantenna and solder leads to the antenna relay. Starting at 3:30 proved to be a good idea once again. This is just conjecture, so try it at your own risk.
. I was impressed with the results of this experiment. Also lubricated the pivot point of the actuating bar with light oil the oil was designed for model trains. His photos are reproduced here with his permission. The pair closest to the choke in the top of the photo are series connected to pass the audio from the modulation transformer to the reactor. In some of my research I read about a simple test bench where the author had a milliamp meter inline between the Variac and the radio. In principle, a choke a.