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Schematic 60, 70 & 80

Schematic 60, 70 & 80 ; Grigsby-Grunow - (ID = 244714) Radio
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Schematic 60, 70 & 80 ; Grigsby-Grunow - (ID = 244714) Radio
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Country:  United States of America (USA)
Manufacturer / Brand:  Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)
Year: 1928 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 8: UX226 UX226 UX226 UY227 UX226 UX171A UX171A 280
Main principle TRF without regeneration; Neutrodyne
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC) / 115 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Radiomuseum.org Model: Schematic 60, 70 & 80 - Grigsby-Grunow -Hinds Co.
Material Metal case
Shape Chassis only or for «building in»
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Literature/Schematics (1) Gernsback


All listed radios etc. from Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)
Here you find 200 models, 118 with images and 156 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


 


Forum contributions about this model
Grigsby-Grunow -: Schematic 60, 70 & 80
Threads: 2 | Posts: 4
Hits: 1184     Replies: 1
grigsby-g: Schematic 60, 70 & 80
Leland Hilburg
15.Jun.13
  1

Dear Alan Douglas and other members:

I am looking for a dial string guide for my

Majestic 70 chassis<  Any Help ?

Alan Scott Douglas † 16.11.15
19.Jun.13
  2

There's nothing in the service manual showing the assembled drive, only photos of the individual parts.  You could buy the drum drive cable for 50 cents in 1929.

 
Hits: 1125     Replies: 1
grigsby-g: Schematic 60, 70 & 80
Leland Hilburg
11.Jun.13
  1

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-

Lee

Alan Scott Douglas † 16.11.15
13.Jun.13
  2

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.

 
Grigsby-Grunow -: Schematic 60, 70 & 80
End of forum contributions about this model

  
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