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Sound Rating: 5 / 10 # Owners: 1
Relaibility Rating: 5 / 10 Views: 216

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Technical Details

Brand: Grundig

Model:TK 25

Category:Mid High Fidelity




Country of Manufacture:Germany

Release dates:1959 - 1962

Tracks:1/4 Rec/PB

Speeds: 1 7/8, 3 3/4

Max Reel Size("): 7"

Number of heads: 2

Head Composition: Permalloy

Head Configuration: full-track-mono

# Motors:

Auto Reverse?:No

Voltage(s): 110-120v

Outputs: RCA

Frequency Response:(+ 3, -5 dB): 60Hz - 15kHz at 3¾ ips. 60Hz - 8kHz at 1 ips

Wow and Flutter:less than 0.25 % at 3¾ ips. less than 0.4% at 1 ips

Signal-to-Noise Ratio:better than 45 db

Sound quality rating:5 / 10

Long-term reliability rating: 5/ 10

Additional Details


The TK 25 was from the same family as the TK20 and TK24. It was meant to offer that little bit extra over the TK20, a single speed (3¾ ips) mono machine.  The TK 25 had two speeds plus a fader control, enabling mike to be faded to either diode or radio input. It also featured a superimpose button for sound-on-sound. In addition, the TK 25’s motor was multi-pole and driven from a 42V AC winding on the mains transformer. In most other respects though, the recorder was identical to its classmates. 5¾-inch spool capacity, 3-digit counter, EM84 magic ribbon level indicator, 2½ watt audio output, and 3¾ x 5½” high flux internal speaker. Unfortunately, the TK25 wasn’t very popular and did not sell widely. which explains why it is seldom seen today. Price when new in the UK was £65 2s.

Additional Info

Bias frequency: 75kHz / Valve complement: EF86, ECC81 (12AT7), 2 x EL95, EM84 and 2 metal rectifiers / Audio output power: 2½ watts / Inputs: microphone (2mV / 500Kohm) diode (8.5mv / 44Kohm) radio (80mv / 1Mohm) / Outputs: external speaker 3-7 ohms external amplifier (high impedance output, 700 mV / 10 Kohm / Speaker(s): 1 x high flux permanent magnet moving coil 3¾ x 5½” / Dimensions: 14 x 12½ x 7½” (355.6 x 317.5 x 190 mm) / Weight: 25 lbs (11.36 kg) / half-track mono


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