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Wavemeter and Filter 247 (247-W)

Wavemeter and Filter 247 ; General Radio (ID = 52612) mod-pre26 Wavemeter and Filter 247 ; General Radio (ID = 334780) mod-pre26
Wavemeter and Filter 247 ; General Radio (ID = 334781) mod-pre26 Wavemeter and Filter 247 ; General Radio (ID = 334782) mod-pre26
Wavemeter and Filter 247 ; General Radio (ID = 334783) mod-pre26 Wavemeter and Filter 247 ; General Radio (ID = 334784) mod-pre26
Wavemeter and Filter 247 ; General Radio (ID = 1153667) mod-pre26 Wavemeter and Filter 247 ; General Radio (ID = 1153668) mod-pre26
Wavemeter and Filter 247 ; General Radio (ID = 1153681) mod-pre26 Wavemeter and Filter 247 ; General Radio (ID = 1585839) mod-pre26
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Wavemeter and Filter 247 ; General Radio (ID = 52612) mod-pre26
General Radio: Wavemeter and Filter 247 [mod-pre26] ID = 52612 400x284
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For model Wavemeter and Filter 247 (247-W), General Radio Company; Cambridge (MA)
 
Country:  United States of America (USA)
Manufacturer / Brand:  General Radio Company; Cambridge (MA)
alternative name
 
GenRad
Year: 1923 ?? Category: Radio module pre 1926 (not a part, not a key)
Main principle RF-Circuit or wave trap (separate, can also be an antenna with amp.)
Wave bands Broadcast only (MW).
Details
Power type and voltage No Power needed
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: Wavemeter and Filter 247 - General Radio Company;
Material Various materials
Dimensions (WHD) 8 x 6 x 4 inch / 203 x 152 x 102 mm
Notes

Condenser in metal can, coil body made of Bakelite. The Variable Condenser is marked "Wavemeter", its max. capacity 456 µµF. The wavelength is given as 200 to 600 meters.
There are extension coils avalable for the following ranges:
247-W2 for 400-1200 meters,
247-W1/2 for 100-300 meters,
247-W1/4 for 50-150 meters.
 

Price in first year of sale 10.00 $
External source of data Konrad Birkner

Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.



All listed radios etc. from General Radio Company; Cambridge (MA)
Here you find 211 models, 194 with images and 81 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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