Country of Manufacture:Japan
Release dates:1958 - 1961
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Half-Track
# Motors: 1
Frequency Response:(± 2dB): 7½ ips: 30Hz - 20kHz 3¾ ips: 30Hz - 16kHz
Wow and Flutter:better than 0.1%
Signal-to-Noise Ratio:better than 55 dB unweighted
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Imported from Germany by TSL (Technical Suppliers Limited) of Goldhawk Road, London W.12, the Harting
HM5 series of tape recorders were of extremely high quality.
Drive was via a very large Engel split-phase capacitor motor. The 5-inch diameter indirectly driven flywheel (weighing an impressive 4lbs) was statically balanced to within micro-grams. A very fast mechanical braking
system was employed and all shafts and bearings were precision ground to within micro-inches. As a result, wow and flutter figures were comparable to much more expensive tape recorders. Record/replay characteristics were to C.C.I.R. standards and Input mixing was possible.
Distortion: at 10dB below saturation point – less than 1% at 400Hz / Audio output power: 4 watts (6 watts peak) at 5 ohms / Amplifier input: 1 mV / Valve complement: EF86, ECC83, EL84, ECC81, EM84 and bridge rectifier / Bias frequency: 60 kHz / Fast wind time: 2½ minutes for 1800ft / Inputs: microphone, radio & phono – also socket for remote control / Outputs: external speaker, high impedance (0.5mV 10k) for external amplifier / Speaker(s): Lorenz high-flux 8½ x 6 inch speaker with large ALNI magnet / Dimensions: 12¾ x 15½ x 8½” (320 x 390 x 215 mm) 10½” (265 mm) high with lid closed / Weight: 37½ lbs (17kg) / half-track mono