Country of Manufacture:UK
Release dates:1960 - 1963
Speeds: 1 7/8, 3 3/4
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:( 3 dB): 3¾ ips: 30 - 16,000 c
Wow and Flutter:0.12% at 3¾ ips
Signal-to-Noise Ratio:Signal noise ratio: better than 55 db
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
The KM22 half and KM33 quarter-track mono recorders appeared in early 1960 and were two-speed (3¾ and 1 ips) machines utilising a single Papst motor-driven Elektron TB491 deck.
Fitted with Bogen heads they boasted a true Hi-Fi frequency response of 30-16,000 cps at 3¾ ips.
Features included superimpose, pause, monitor and input mixing. A small internal speaker was incorporated but facilities were provided for connecting an external hi-fi speaker for superior reproduction.
Prices (when new) were 54gns for the two-track KM22 and 62gns for the four-track KM33.
Speed tolerance: better than 0.75% / Signal noise ratio: better than 55 db / noise ratio: better than 55 db / Rewind time: less than 2 minutes / Bias oscillator: approx. 50,000 c / s / Speaker(s): single internal / Dimensions: 14 x 12 x 8 inches (356 x 305 x 203 mm) / Weight: 17½ lbs (7.952 kg) / KM22: half-track mono KM33: quarter-track mono