Technical Details
Brand: Grundig
Model:TK 8/3D
Category:Vintage
Application:Portable
Electronics:Tube
Equalization:IEC
Country of Manufacture:Germany
Release dates:1957 - 1960
Tracks:1/2 Rec/PB
Speeds: 3 3/4, 7 1/2
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
# Motors: 1
Voltage(s): 220-240v
Frequency Response:(all 3 dB): 7½ ips: 50Hz - 13kHz
Wow and Flutter:0.2% at 7½ & 0.5% at 3¾ ips
Signal-to-Noise Ratio:>40dB
Sound quality rating:5 / 10
Long-term reliability rating: 5/ 10
Additional Details
Description
A half-track, two speed (7½ & 3¾ ips) mono recorder with two heads (erase and record/playback) made for the UK and US market. It was identical (but for the colour scheme) to the TK 7 which appears to have been manufactured for the local (European) market only.
The drive mechanism consisted of an outer rotating cage split-phase induction motor and capstan with rubber pressure roller. The TK 8 had three speakers built in to the cabinet, one oval forward facing and two smaller round ones on either side. A three digit tape position indicator and an automatic stop mechanism
utilising metal sensing foils were incorporated into the design.
Additional Info
Valve complement: EF86, ECC81, EL84 (output), EL 42 for the oscillator & metal rectifier / Rewind speed: approximately 1½ minutes / Inputs: microphone: 2mV / 500K. radio:2mV / 20K. diode: 100mV / 1M / Audio output power: 2½ watts / Speaker(s): three built-in speakers – one 6″ elliptical & two 2½” HF / Dimensions: 15½ x 14½ x 8″ (394 x 368.5 x 203 mm) / Weight: 32 lbs (14.5 kg) / half-track mono