File:KOYO KTR-1770.jpg

English: Multiband Receiver - KOYO KTR-1770: A multi-band receiver from 1970 in a special version. Size 375 x 250 x 135 mm, weight 6 kg. As standard there are long wave, medium wave, marine band, shortwave, VHF high, AIR radio, FM broadcasting, FM low. In addition, there is a subsequently built-in UHF converter for the frequencies from 398-500 MHz. Adjustable on the right side with a separate regulator. Fine tuning is done using the normal tuning on the front panel. With the BFO control an SSB single sideband signal can be demodulated. The squelch is not adjustable. There are two telescopic antennas, connections for wire antennas and a jack for coaxial cable. A port for audiotape and headphones is on the left. I've tried it and it still works. But apart from a few radio stations, I couldn't hear anything. For the Swiss IBBK radio it is still usable. A 50 year old rarity whose value I cannot estimate. Switzerland, March 4, 2021.