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Crystal (Quartz) FT-241

Crystal FT-241; MILITARY U.S. (ID = 785731) Radio part Crystal FT-241; MILITARY U.S. (ID = 785732) Radio part
Crystal FT-241; MILITARY U.S. (ID = 785733) Radio part
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Crystal FT-241; MILITARY U.S. (ID = 785731) Radio part
MILITARY U.S.: Crystal FT-241 [Radio part] ID = 785731 933x787
Select picture or schematic to display from thumbnails on the right and click for download.
For model Crystal (Quartz) FT-241, MILITARY U.S. (different makers for same model):
FT-241 in box, fitted in BC-604
 
Country:  United States of America (USA)
Manufacturer / Brand:  MILITARY U.S. (different makers for same model)
Year: 1943 ? Category: Radio part (not a module) 
Wave bands - without
Details
Power type and voltage No Power needed
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: Crystal FT-241 - MILITARY U.S. different makers
Material Various materials
Shape Miscellaneous shapes - described under notes.
Dimensions (WHD) 29 x 39 x 12 mm / 1.1 x 1.5 x 0.5 inch
Notes FT-241 crystals, black series, were used in the BC-604 with a working frequency 20-27,9 MHz, 80 "channels" numbered 0-79.
Their fundamental frequency is 370,370 - 516,666 kHz, to be multiplied by 54.

FT-241 crystals, brown series, were used in the BC-684 with a working frequency 27-38,9 MHz, 120 "channels" numbered 270-389.
Their fundamental frequency is 375,000 - 540,277 kHz, to be multiplied by 72.
This crystal type is far not as indestructible as the FT-243 type; the small silvered crystal-plate is welded-connected with two spring-type wires, but these connections are often broken after many years.
These crystals have a very interesting fundamental frequency range to compose sharp IF- filters around 450-475 kHz.
Net weight (2.2 lb = 1 kg) 0.010 kg / 0 lb 0.4 oz (0.022 lb)
Source of data - - Data from my own collection

Model page created by Jan Terranea. See "Data change" for further contributors.



All listed radios etc. from MILITARY U.S. (different makers for same model)
Here you find 352 models, 304 with images and 168 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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