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grigsby-g: Schematic 60, 70 & 80

Martin Renz Ernst Erb Vincent de Franco Martin Bösch Mark Hippenstiel Bernhard Nagel Otmar Jung Heribert Jung Eilert Menke 
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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » grigsby-g: Schematic 60, 70 & 80
Leland Hilburg
Leland Hilburg
USA  Articles: 2
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11.Jun.13 22:12

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Dear Members:

I am restoring a Majestic Model 70, with an 7P6 Power Unit which is giving me

problems!  Does anyone know the Ufarad values of the 6 electolytic capacitors

used in the "Condenser Bank " ??  I know they all connect to B-


Alan Scott Douglas † 16.11.15
Alan Scott Douglas † 16.11.15
USA  Articles: 49
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13.Jun.13 04:03

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They're paper, but you could use electrolytics.  The schematics are in Rider vol.1, two variations.  The older one uses values of 2, 6, 2, 2 and if there's a bypass across the 71A cathode resistor that is 1 microfarad.