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Autophon AG, CH - Solothurn

Shortwave Receiver E - 76

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überarbeitet am 17.10.2010

Autophon E - 76,
the "Civilian brother" of the E - 627

Single conversion, I.F. 455 kHz

Analog dial, non linear

AM, SSB (BFO)

1,5 - 32 MHz

Sensitivity

Selectivity -6 dB
ca. 4 / 6 kHz

Attenuator, AGC, Crystal Filter
Bedienungsanleitung

The successor of the all wave battery tube receiver E-44 the famous E-627, has been sold to civilian users under the designation E-76.

Typenschild E-76 Typenschild des E-76

The receiver comes in a gray metal cabinet, a protective front cover while cover up the whole front panel during transports and can be attached to the back, when the receiver is in operation.
The front panel's width is 44 cm, with both carrying handles at it's sides, the complete receiver has a width of 51cm, height of 27cm, depth of 26cm and a weight of 19,8 kg. There are two more carrying handles mounted to the front panel giving additional protection.

The left side of the front panel can be divided in three sections: on the top the antenna / earth connectors and the signal strength meter, in the middle the dial, the bandswitch and the main tuning knob and a bottom row with various controls.
On the right hand, You find the speaker protected by a metal speaker grille, the mains voltage selector and the mains cable connector. A separate connector allows using the Z627/1 vibrator pack 6/12V DV power supply.

The antenna connector is of SO-239 type, underneath You find the earth socket and two BNC connectors with protective lids giving You access to the receiver's intermediate frequency and acting as a second antenna connector.
Next to the antenna connectors, some fuses and a socket for crystal controlled fixed frequency operation, is a round signal stregth meter switchable to display the plate / B+ voltage. A round knob allows to dim the dial lights.

Below You find the dial of the turret tuning assembly. Due to the construction of the set, the analog dial is not linear, so on higher frequencies, the 100 kHz lines are much nearer then in the low band segments - thus dial accuracy is better low frequencies. Dial calibration has been made at the manunfacturer: using a crystal controlled calibrator providing a spectrum of known frequencies, the frequency marks have been engraved individually on each set's dial.
The big rotary control at the left acts as bandswitch and operates the turret tuner, the right knob is the main tuning control, that can be locked mechanically on a tuned frequency. The shortwave band segments are 1,5-2,5 MHz, 2,5-4,1 MHz, 4,1-7 MHz, 7-11,5 MHz, 11,5-19,2 MHz and 19,2-32 MHz.

The controls below are used for RF and AF signal processing: The switch "Anti - Fading" next to the headphone sockets activates the automatic gain control (AGC), the RF-Gain control (called "Empfindlichkeit / Sensibilité") is usually turned fully clockwise for standard operation with AGC on. The BFO knob is called "Telegraphie - Überlagerer" (Telegraphy heterodyne) and is used for CW and SSB reception. The bandwitch switch, which follows next on the right hand, has a wide (+/- 3,5 kHz), narrow (+/- 2 kHz) and a "Filter" position. This will enable a +/- 100 Hz crystal filter, the "Kristallfiler" control will be operational only in this position and can be used to shift the passband of the filter to fade out a nearby interfering signal. Further right, You find the volume control, called "Laustärke/ Puissance" in german/french language.
I'm not absolutely sure whether the civilian version has been equipped with a clock like the military version did. Three little holes below the speaker grille allow to mount a Revue mechanical clock like the one usually found in (or usually taken away from) the E-627.

The E-76 is identical with the military E-627, the latter has usually been modified with an additional switch to use the meter for oscillator voltage control - the military version is far more common in Switzerland and is consideres one of the classics military receivers.
Many thanks to OM Hans Schertenleib, who sold me his E-76 for a very fair price.

further reading:
d: das Fernmeldematerial der Schweizer Armee, 7. Folge, R. J. Ritter
d: www.radiomuseum.org

© Martin Bösch 10.6.2007