Grundig TK 245 specifications

Grundig Stereo tape recorder TK 245 automatic

General

connectors

Tech nical data

special features

similar models until 1969 for horizontal operation (tubes TK 245 + full transistor TK 247):

models of the perpendicular that is usable in a follow-up series in 1969, in a totally new Design, technical quality (e.g., 3 heads):

manufacturer: Grundig radio-Werke GmbH, Fürth
model: TK 245 AUTOMATIC de Luxe Stereo
type: suitcase-reel tape recorder for horizontal operation with built-in Mono amplifier and twin-speaker
year of construction: 1966 – 1969
Made in: Nürnberg
color: wood grain/walnut, Front wooden lattice
remote control: no
power supply: 110 V – 240 V, 50 Hz (or 60 Hz with conversion kit)
power consumption: 70 W
dimensions: 410 x 200 x 340 mm (W x h x d)
weight: 13.5 Kg
new price: approx. 540 DM without accessories; with original equipment in DEC 1966 in Hannover 640 DM (65 DM: microphone GDM-317+ table tripod; 30 DM: 18 cm/ 730 m-tape; 11 DM: DIN-cable-242)

number of inputs: 4
- 2x micro: 2x 2 – 40-mV / a 1.5 MΩ
- panel: 2x 90 – 1'800 mV / 1 MΩ
- Radio (socket = amplifier output): 2x 4 – 80 mV / 44 kΩ
number of outputs: 3 (including 1 input=output)
- amplifier (socket = input from the Radio): 2x 1 V/ 22 kΩ
- headphone/Amplifier recording monitor: DIN 2x 1 V/ 22 kΩ
- speakers: 5 Ω for the right Stereo channel, or mono playback (Supplement to, or replacement of the 2 built-in speakers)

amplifier (socket = input from the Radio): 2x 1 V/ 22 kΩ
headphone/Amplifier recording monitor: DIN 2x 1 V/ 22 kΩ
speakers: 5 Ω for the right Stereo channel, or mono playback (Supplement to, or replacement of the 2 built-in speakers)

Max. Coil diameter: 18 cm
Drive: 1 motor, friction wheel drive, Fast forward/rewind by belt drive
Heads: 2 heads (extinguishing head and combination recording/playback head)
Tracks: 4 (quarter track)
Tape speeds: 9.5 cm/s / 19 cm/s
Rewind time: approx. 270 sec. for LS-band 18cm coil
(synchronisation fluctuations):
Pitch fluctuations:
- ≤ ± 0,15 % at 9.5cm/s
- ≤ ± 0,12 % at 19 cm/s
Total frequency response:
- 50 – 12,500 Hz at 9.5 cm/s
- 50 – 16,000 Hz at 19 cm/s
Dynamics:
- ≥ 45 dB at 9.5 cm/s
- &# 8805; 46 dB at 19 cm/s

Inertialess level indicator tube (Magic band); from autumn 1967 (radio exhibition) Double-turn-coil pointer instrument with two BC-107 transistors.
Switch-off automatic level control (with this in 1966 for the first time in tape history also for stereo operation).
Both stereo channels are controlled together via A controller.
Multiplay mixing controller for trick recording control.
Without a stereo amplifier, the tape recorder plays the right channel in stereo mode and can play the left channel with a mono radio (amplifier). This already creates a wide stereo base.
Depending on the headphone connection type (2 DIN sockets!) only one channel can be heard for trick editing; when playing, both channels, dual mono or stereo, can also be heard.
Automatic STOP at the end of the belt.

Also as Grundig TK 247, then fully transistor with two built-in 4 watt power amplifiers, without automatic modulation.
All network tape recorders up to 1968/69 carry the name supplement "de Luxe", some devices before 1966 received "Luxus" or "L" as a supplement. From 1969/70 you can see "HIFI" or "HIFI Stereo".
From the very beginning, as early as 1966, "de Luxe" was written on the front cover (AUTOMATIC de Luxe), from autumn 1967 then additionally on the sound head cover (photos), under the network selector switch (as with the Grundig TK 247), as well as in the updated operating instructions in many places, while other passages and photos correspond to the first version. Both stereo channels are still controlled together via a controller, or by automatic.

"de Luxe" is not in itself a sufficient indication of the vintage, as is falsely claimed in some articles. Anyone looking for the more modern double-pointer instrument is dependent on photos or descriptions of the provider in this regard. Sales forums use the same device name for both control variants.

A rare equipment variant has a silver one instead of the gray base plate (on which the tape reels lie/run).

It does not quite meet the HI-FI standard DIN-45500, which was co-developed by Grundig and effectively printed as HIFI on all suitable devices; neither from the TK 245, nor from the TK 247, even if both devices are certified as having high fidelity. Nevertheless, sellers are happy to misleadingly offer both types as HIFI stereo tape recorders.

Note: the mains selector switch has been delivered to 220 volts. Since 1987, however, the power grid has had 230 volts and the selector switch should be switched to 240 volts with a coin (photo) - to protect the device.