In the late sixties Lenco released the Lenco Silvretta HF-TR* receiver. The power amplifier electronics was designed and produced by Lenco Switzerland. It had a built in loudspeaker from Audax that Lenco also used in some of their portable record player. There was a socket for a tape recorder, a socket for a record player and a socket for an external loudspeaker. The HF-TR receiver module 6839.02 was manufactured by Sondyna AG**.

Lenco Silvretta

front view

Output power:

Distortion:

Frequency response:

Input sensitivity DIN sockets:

4 W into 5 Ω

Lenco Silvretta

rear side

Lenco Silvretta

inside view

Sondyna HF-TR

module 6839.02

* HF-TR was a 6 channel RF distribution system that run over the telephone network from the Swiss PTT - the only Swiss telephone company at that time.

**Sondyna AG was a Swiss manufacturer, importer and distributor for home electronics.