Anybody with any ideas to locate a schematic wouild be appreciated. :I have searched through the schematics but as i have no model number it is difficult, maybe no us equivalent was made. :Th valve lineup is 6K8GT,6K7GT,6K7GT,6Q7GT,6V6GT, Rectifier and Vibrator pack, it has capacitor tuning. :Hi i have an old car radio built in the uk by world radios ltd london under licence from motorola. Both used a non-synchronous vibrator with either 0Z4 or 6X5 rectifier. Both were also made with either Loktal or Octal valves. I cant find a loose connection but i will try. When i turn on the radio it sounds good for a couple of minutes then it is so garbled or there is no noise. Both use a 6A8 valve instead of the 6K8, and a 6K6 instead of the 6V6. Component checking of higher value resistors with a controlled mid level heated air flow from a blow. I did find two 1939 models that are close. ![]() equivalent for your Motorola licensed World Radios Ltd.radio valve line-up. Learn more about the latest consumer two-way radios. ![]() Motorola walkie talkie radios are designed to provide affordable and dependable communication. NEXT TIME I NEED ADVICE, I WILL TALK TO A PROFESSIONAL.I could not locate an exact U.S. With a wide variety to choose from, our TALKABOUT walkie-talkies are the perfect addition to your needs, whether they’re for adventures, family fun, emergency preparedness or everyday use. :WHAT DO YOU MEAN, IM NOT SHOUTING, YOU ARE. AFTER IT RUNS FOR AWHILE IT'S OK AND EVENS OUT.WHAT HAS TO BE DONE TO CORRECT THIS. THE RADIO GOES ON ALMOST INSTANTLY, BUT THAN THE VOLUME GOES LOWER AND THEN HIGHER. :::I HAVE A 1939 MOTOROLA RADIO, AND IT PLAYS GREAT. On those units, it is possible to be ripping off 125+ WPM. With time, one can be a real speed demon, with the slowing factor only being the response time of the typebox if using an interconnected hard copy being made out on a teletype printer display.īUT when using the last device mentioned, as well as by just engaging the tape perforator( or newer units use memory discs ) Leave it there and see what happens for a while. The normal radio should begin to play about 85 volts. Turn the voltage to -0- and then go up slowly, 10V-20V-30V-40V-50V-60V. There is no transitional upper/to/ lower case shifting, and a person who gets his start on one of those is not encumbered with those additional time consuming considerations. Here is what I know: With a Variac you plug the radio into the unit and the Variac into the wall plug. It's kinda like "find out what all is working, and then what isn't working is the problem" (Sherlock Holmes, I apoligize)Īnd then.there might also be this possibility.ever typed on a teletype or cipher machine? After that, you have a very small part of the radio to fix. As said above, the AVC will tell you if the RF part is working, the B+ will eliminate the power supply, then you have the RF and IF stages to worry about. Measure the B+, the AVC, and the plate Voltage of the output stage, and insead of looking at a whole radio, look for the part of the radio that is causing the trouble. The radio has three seperate sections: the power supply, the RF and the Audio. ![]() Using any other meter on the AVC circuit will cause it to perform improperly, and voltages you see may not tell you much (though a normal 20,000 ohms per volt meter will tell you a bit about the AVC circuit-whether it's performing at all or not.results just won't be accurate, and the RF circuitry might overload with strong signals). Check to see if B voltages change, or AVC, though properly monitoring AVC requires a very high impedance meter, like a digital meter or a vacuum tube volt meter. ![]() :Monitor voltages during the performance changes you note.
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