| ::I have a Majestic radio model 70B with 7P6 power supply. The voltages are present for the 5Vpower, 1 1/2 V A.F, 2 1/2 det and 1 1/2 RF, but no +50, +96 or +260. All of the tubes light up and the radio is in very good shape (the old wiring has been replaced). :: ::I suspect the transformers that generate these voltages or a "common" feed to these transformers. :: ::I would appreictae any information that anyone can share. I have .pdf files of the chassis showing graphics as well as a schematic. :: ::Grigsby-Grunow Co. ::Model: 70B ::Power: ::Chassis: ::Circuit: ::Year: Pre 1932 ::IF: ::Tubes: ::Bands: ::Resources ::Riders Volume 1 - MAJESTIC 1-5 ::Riders Volume 1 - MAJESTIC 1-10 ::Riders Volume 1 - MAJESTIC 1-24 ::Courtesy Nostalgia Air ::Courtesy Nostalgia Air ::Courtesy Nostalgia Air ::Courtesy Nostalgia Air :: ::I am persistent and not ready to give up on bringing this radio back to life. :: ::Thanks in advance for all of your help. :: ::Terry : :Hi Terry, : :One of the first things I would check would be continuity of the speaker field winding. If it is open you will not get any +B voltages. : :Radiodoc : Terry, I should have said in my previous post that you would not get the +96 or +50 volts if the field coil was open. Norm had the better idea in his post about checking the plus voltage on the rectifier and checking for continuity through the 400 ohm choke. Radiodoc |
| Majestic Model 70B | |
 Terry | |
  Norm Leal | |
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| Thomas Dermody | |
| Terry | |
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| Terry | |
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| Radiodoc | |
| Thomas Dermody | |
| Terry | |
| Thomas Dermody | |
| Thomas Dermody | |
| Thomas Dermody | |
| Terry | |
| Thomas Dermody |
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