Crystal (Quartz) FT-241
ID = 177437
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MILITARY U.S.: Crystal FT-241 [Radio part] ID = 785731 933x787
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| Year: 1943 ? | Type: Radio part (not a module) |
| Wave bands | - without |
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| 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) |
| Collectors' prices | 1 Collector price (for members Radiomuseum.org) |
| 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 242 models, 200 with images and 101 with schematics.
Collection of Jan Terranea (NL)