en:e-601
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+ | ====== E-601 (E41) ====== | ||
+ | **Allwellenempfänger Uster** (All Wave Receiver 41), **E41**; developed and produced by [[Zellweger|Zellweger AG, Uster]]. | ||
+ | The Swiss company [[Zellweger]], | ||
+ | The receiver covers a very large part of the spectrum from 100 kHz up to 60 MHz, it uses plug-in coil sets to change wavebands. The frequency marks are quite coarse. | ||
+ | |||
+ | {{: | ||
+ | ===== Technical Data ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Modes]]: [[A1]] with BFO, [[A3|AM (A3)]], [[A3J|SSB (A3J]] with BFO | ||
+ | * [[Frequency range]]: 100 kHz - 60 MHz in ten frequency ranges, **Plug in coil sets** to select frequency range, on the coil sets, a coarse frequency dial is available. | ||
+ | * [[Sensitivity]]: | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Mains]]: Mains power supply operated from 110, 125, 145, **220**, 250 Volts, delivering 6 V (0,47 A, for valve heaters) and 120 V (35 mA, plate voltage). | ||
+ | * [[Accumulator / Batteries]]: | ||
+ | |||
+ | Der Empfänger kann von einem 6V Akkumulator oder vom Netz mittels Netzgerät / Wechselrichter betrieben werden. | ||
+ | Die 6V - Gleichspannung von den Akkumulatoren wird direkt als Heizspannung genutzt, die Anodenspannung von 120V wird von einem Zerhacker “Mallory Vibrator” erzeugt und nachher erneut gleichgerichtet. | ||
+ | |||
+ | Das Netzspeisegerät erlaubt den Betrieb den Empfängers an Wechselspannungen von 110 - 250 V, auch im Netzbetrieb wird die Spannung zunächst auf 6V heruntertransformiert, | ||
+ | |||
+ | Ein Notbetrieb, beispielsweise bei Versagen des Wechselrichters, | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | * Receiver Case **E41**: 410 x 225 x 350 mm, 17 kg | ||
+ | * Coil sets case **E41**: 410 x 225 x 350 mm, 17 kg | ||
+ | * Mains power supply **E41 WR**: 425 x 470 x 260 mm, 20 kg | ||
+ | * two NiFe - Accumulators, | ||
+ | |||
+ | The receiver can be powered from 6V accumulators or from mains. The 6V DC voltage is used directly for valve heaters and via a " | ||
+ | The mains power supply accepts different voltages from 110 - 250 V and delivers an output voltage of 6V DC. This will be used to heat the valves and to feed the " | ||
+ | Only in an emergency, the receiver can be powered with plate voltage from two 60V B+ batteries. | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | * The **Standard antenna** is a 1,8 m Whip antenna (consisting of six elements, which are stored in the lid of the coil sets case) or a long wire antenna. As an alternative, | ||
+ | * **Headphones**, | ||
+ | |||
+ | ---- | ||
+ | {{: | ||
+ | ===== Operation ===== | ||
+ | When the set was introduced, many wireless operators turned out to be discontented: | ||
+ | |||
+ | The receiver system consists of the 41 x 22,5 x 35 cm receiver case (17 kg), a plug-in coils case with the same dimensions with a compartment to store headphones and antenna cables. The mains power supply is twice as high with it's 42,5 x 47 x 26 kg and has a weight of 20 kg, two Fe-Ni accumulators with 17,8 kg each are also needed.\\ | ||
+ | The receiver can be fed from a 1,8 m whip antenna, a long wire antenna or for direction finding purposes from the directional antenna ob the much older receiver E31. | ||
+ | |||
+ | The operation scheme of the Zellweger E41 is very simple, as the engineers at Zellweger did couple certain functions to simplify the operation of the receiver and to keep the number of controls down. | ||
+ | |||
+ | Connect the whip antenna with the antenna socket, the mains power supply with the power supply socket and test the heaters voltage indicated on the instrument of the power supply.\\ | ||
+ | Plug in the coil set with the corresponding band range containing the desired frequency. The main switch is combined with the volume control, turn it to the right side for normal (AM) reception and to the left for reception of morse code (CW) transmissions. Tune to the desired frequeny, there are some quite coarse markings in on the coil sets which allow tuning to the nearest 20 kHz. Use the fine tuning (" | ||
+ | |||
+ | ===== Technical Principle ===== | ||
+ | {{: | ||
+ | The Zellweger E41 operates as a single conversion receiver with an intermediate frequency of 70 kHz in bands 1 - 3: after two R.F. amplifier stages, the signal is mixed to the first I.F. of 70 kHz and fed to the demodulator after another amplifier stage. The BFO is acting on 70,8 kHz which will result in a 800 Hz beat note in CW mode. | ||
+ | In the bands 4 - 7, the receiver acts as a single conversion set, too: after the first two R.F. amplifier stages, the signal is mixed to an intermediate frequency of 465 kHz. The signal is fed to the demodulator after two I.F. amplifier stages, the BFO oscillator' | ||
+ | |||
+ | In the bands 8 - 10, the receiver' | ||
+ | |||
+ | ==== Valve setup ==== | ||
+ | The valves used in this receiver are the battery valve [[KF3U]], as first and second mixer and in the first audio stage, a [[KH1M]] is used; and as final audio tube a double triode [[CB220M]] is used. | ||
+ | |||
+ | ==== Development ==== | ||
+ | The receiver E41 has been developed by Zellweger, Uster, during the years of World War II, they used the kind of battery tubes (made by Tungsram in Budapest), which were for Switzerland still available in those days. | ||
+ | |||
+ | ==== Field use ==== | ||
+ | The Swiss Army bought 138 standalone units of this receiver, another 198 sets made part of complete wireless stations, like the [[FL40]] (Fahrbar Leicht 40), [[TS40]] (Tragbar Schwer 40); in the [[KL43]] (Kurz Lang 43) and the [[M44]] (Motorisierte Funkstation 44), the same receiver has been used with a reduced number of plug in coil sets. Eventually, the [[E41]] replaced the Lorenz E509/I as main receiver of the [[G1,5K]] (“Grossen 1,5 kW Kurzwellenstation”) and has been in use as main receiver in the [[G3L]] and [[G1,2K]] wireless stations of the airforce. | ||
+ | |||
+ | {{gallery>: | ||
+ | ===== Manuals ===== | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | |||
+ | ==== Additional information ==== | ||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | * [[http:// |
en/e-601.txt · Zuletzt geändert: 2018/10/31 18:10 von 127.0.0.1