en:e-641
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+ | ====== E-641: Telefunken E 148 Uk/2 ====== | ||
+ | **E-641**, **Telefunken E 148 Uk/2**; developed and produced by [[Telefunken D|Telefunken, | ||
+ | The VHF receiver [[Telefunken d|Telefunken E 148 Uk/2]] had the designation E-641 in the Swiss Army, six sets were purchased for the " | ||
+ | |||
+ | {{: | ||
+ | ===== Technical Data ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Modes]]: [[A1|CW (A1)]], [[A3|AM (A3)]], [[F3|FM (F3)]] | ||
+ | * [[Frequency range]]: | ||
+ | * **Analog dial**, accuracy 25 - 50 kHz | ||
+ | * [[Sensitivity]]: | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Mains]]: 110 - 240 V AC | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | * 550 x 202 x 384 mm, 40 kg | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | |||
+ | {{: | ||
+ | ===== Operation ===== | ||
+ | The Telefunken E 148 Uk/2, which was used in the Swiss Army under the designation E-641, was developed around 1957 and acquired in 1960, six receivers have been purchased for use of the " | ||
+ | |||
+ | The 16 tubes single conversion superhet consists of a tuner insert (RF unit), with the frequency determining parts and the E 148/149 basic unit, in which the IF 10.7 MHz is processed. | ||
+ | |||
+ | In the middle of the front panel, the frequency-determining insertion is located. In case of the E 148 this is the 25 - 84 MHz unit. With the switch " | ||
+ | |||
+ | The mode selector switch is located on the left of the front panel; in the positions "A1 / A3 Hand", the RF gain can be set manually. At the top is the switch for the low-pass filter. | ||
+ | |||
+ | On the right you will find the volume control (AF control), which is combined with the power switch, the switch to set the measuring instrument to indicate the RF or AF line level and below the monitor speaker. | ||
+ | |||
+ | ===== Technical Principle ===== | ||
+ | {{: | ||
+ | In the E-641, the tuning unit 25 - 84 MHz is used, the entire frequency range is covered in one band. | ||
+ | |||
+ | After two tuned HF preamplifier stages ([[de: | ||
+ | |||
+ | In the basic unit, the IF of 10.7 MHz is amplified in six stages (all [[de: | ||
+ | |||
+ | After this, the signal is forwarded for demodulation, | ||
+ | |||
+ | A further [[de: | ||
+ | |||
+ | The set operates on mains voltages of 110 - 240 V, which are stabilized ([[de: | ||
+ | |||
+ | ==== Valve setup ==== | ||
+ | V1 ([[de: | ||
+ | |||
+ | ==== Development ==== | ||
+ | |||
+ | ==== Field use ==== | ||
+ | The Telefunken E 148 Uk/2, which was used in the Swiss Army under the designation E-641, was developed in around 1957 and acquired in 1960; six receivers were used as independent receivers for the " | ||
+ | |||
+ | {{gallery>: | ||
+ | |||
+ | ==== Manuals ==== | ||
+ | * {{ : | ||
+ | |||
+ | ==== Additional information ==== | ||
+ | * [[http:// | ||
+ | * [[https:// |
en/e-641.txt · Zuletzt geändert: 2019/04/07 20:11 von 127.0.0.1