VLF - HF Receiver E 1800 A; manufactured by AEG - Telefunken, Ulm.

There are various versions of the E1800 receiver system existing:

At the top right are the LED bar displays, the left one can be used to display the signal and the carrier (marked in red), the right one shows the HF or LF signal strength.

Below this, to the right of the main tuning knob of the monitor speakers, are the rotary controls for volume control (AF Level), then two multifunctional rotary controls and the monitor speaker switch. The keys above the left rotary control activate the function as BFO or RF Gain, the right rotary control not only selects the Operation mode (DEMOD) and bandwidth (BANDW) as described above, but also, with the keys above it, the notch filter (NOTCH) to suppress an interfering signal and the passband tuning (PASSB), with which the IF filter passband curve can be shifted. This is even indicated on the LED chain above.

The main switch is designed as a small On / Standby toggle switch on the far right.

The set is completely solid state and modular.

The Telefunken E1800 was launched in 1985 and was soon considered by experts to be the world's best receiver. This was followed by the E1800/3 version with an improved HF front end and, around 1994, the E 1800/A version with digital signal processing in the second intermediate frequency, the IF filters can be programmed in software in this DSP technology and replaced the mechanical filters on the 200 kHz IF of the E 1800.

A slimmed-down version of the E1800 is the Telefunken E800.

The receiver exists with different company names on the front panel, from Telefunken, to AEG - Telefunken, DASA, EADS - the company has had different owners over the last twenty years.

• Telefunken E 1800 on the website of www.radiomuseum.org