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Sound Rating: 5 / 10 # Owners: 1
Relaibility Rating: 5 / 10 Views: 118

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Technical Details

Brand: Vortexion

Model:Mk 4



Country of Manufacture:United Kingdom

Release dates:1959 - 1962

Original Price: $£110

Tracks:1/2 Rec/PB

Speeds: 7 1/2, 3 3/4

Max Reel Size("): 7

Number of heads: 2

Head Composition: Permalloy

Head Configuration: half-track mono

Voltage(s): 220-240v

Frequency Response:(all 3 dB): 7½ ips: 30Hz - 12kHz

Wow and Flutter:less than 0.2 % at 7½ ips,  less than 0.5 % at 3¾ ips

Signal-to-Noise Ratio:45 dB

Sound quality rating:5 / 10

Long-term reliability rating: 5/ 10

Additional Details


From the collection of Stuart
Blacklock who bought this recorder from a shop called “Torbay Electronics”
in Devon (England) for £30. This machine came from ( as far as can
now be traced) a small recording studio set up in Newton Abbot (Devon)
in the mid 60’s.  
After the studio closed down, the recorder was kept by one of the engineers.
  Some time later (october 1998) the owner re-discovered it and decided
to sell it.   The recorder was only in the shop for half a day, not
even up for sale when Stuart saw it tucked away in the corner and offered
the gentleman £30 on the spot.

Additional Info

Valve complement: 6BW6, GZ30, EF86 & EL84 / Rewind speed: less than 1 minute / Audio output power: 3.5 watts / Input impedance: less than 22 mV at 30 Ohms / Speaker(s): 15 ohm elliptical 7″ x 4″ permanent magnet / Dimensions: 8¼ x 16¼ x 22½” (210 x 413 x 572 mm) / Weight: 50 lbs (22.7 kg) / half-track mono (could be converted to stereo)


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