en:e-603
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
— | en:e-603 [2018/10/31 18:13] (aktuell) – angelegt - Externe Bearbeitung 127.0.0.1 | ||
---|---|---|---|
Zeile 1: | Zeile 1: | ||
+ | ====== Air Attack Alarm Receiver E-603 (E45)====== | ||
+ | **Alarmempfänger 45** (Air Attack Alarm Receiver 45), **E45**; developed and produced by [[Autophon|Autophon AG, Solothurn]]. | ||
+ | The **E45** has been used as an Air attack Alarm receiver by the Swiss Airforce and Anti-Aircraft troops. A special transmitter transmitted tone coded signals to switch the receiver loud from standby operation when when an air attack message was transmitted. | ||
+ | |||
+ | There has been a possibility to switch the receiver to one out of five "Alarm Groups" | ||
+ | There has been the possibility to control the receiver frequency from crystals stored in a compartment of the power supply case. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ===== Technical Data ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Modes]]: [[A3|AM (A3)]] | ||
+ | * [[Frequency range]]: 3 - 15 MHz in eight frequency ranges, **turret tuner** for band selection; crystal controlled fixed frequency operation | ||
+ | * **Analog dial**, nonlinear | ||
+ | * [[Sensitivity]]: | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Mains]]: 110, 125, 145, 160, **220**, 250 V with matching power supply E45Z | ||
+ | * [[Accumulator / Batteries]]: | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | * Receiver case **E45**: 425 x 320 x 320 mm, 31.5 kg | ||
+ | * Mains power supply and audio amplifier **E45Z**: 425 x 320 x 320 mm, 36 kg | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | * Standard antenna is a long wire antenna | ||
+ | * Antenna tranformer AT45 used when the receiver is fed through a coaxial cable from a remote antenna | ||
+ | |||
+ | ---- | ||
+ | |||
+ | {{: | ||
+ | ===== Operation ===== | ||
+ | The receiving equipment consists of the Receiver E45 in one case / container and EZ45 in a second case, this one containing a separate mains power supply and an integrated audio stage with volume control (with a EBL-21 AF tube) and speaker. Both sets are connected by a heavy multipole cable. | ||
+ | |||
+ | The front panel is divided in two sections by the horizontal linear dial of the turret tuning arrangement. | ||
+ | Above the dial, you find from the left hand the coaxial antenna connector and the sockets for connecting longwire antenna and earth, the crystal socket and switch for fixed frequency operating using speciyl crystals, then the clock (many of these neat Swiss clocks have been taken away by station personnel when these receivers have been taken out of duty), and the signal strength meter. At the right upper corner, you find the switch for the Alarm groups (tone coded) and the socket for the multipole cable (caution: the receiver is almost useless without this cable) and some fuses. | ||
+ | |||
+ | Underneath the frequency dial, You find the rotary band switch operating the turret tuner - find the corresponding dial in the dial window - and at the right hand the main tuning knob with a mechanical blocking arrangement. Two pushbuttons allow to switch the receiver " | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | Many thanks to Daniel Jenni, who sold this set in mint condition to me. | ||
+ | |||
+ | ===== Technical Principle ===== | ||
+ | {{: | ||
+ | The antenna signal has to pass two RF preamplifier stages ([[de: | ||
+ | THe "Alarm Section", | ||
+ | |||
+ | ==== Valve setup ==== | ||
+ | The receiver itself uses only battery valves of the type [[de:D1F]], only the final audio amplifier stage in the power supply cabinet uses two [[de: | ||
+ | |||
+ | ==== Development ==== | ||
+ | |||
+ | ==== Field use ==== | ||
+ | From the Airforce and Anti - Aircraft Units, 87 receivers E45 have been ordered. The selective call unit has been removed in 1974, after this year the receiver was still used to monitor air raid alarm messages, but as it provided no squelch operation, very often, the volume was turned down and the messages ended unheard. | ||
+ | |||
+ | {{gallery>: | ||
+ | |||
+ | ==== Manuals ==== | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | |||
+ | ==== Additional information ==== | ||
+ | * [[http:// | ||
+ | * [[http:// |
en/e-603.txt · Zuletzt geändert: 2018/10/31 18:13 von 127.0.0.1