Grundig TK20 Information wanted.

[Roz]

HELP PLEASE!
I have a Grundig TK20 and the fact sheet with it states the following
¼" open reel analogue recorder
¼ track - ie stereo each direction
Stereo DIN line input & output connections
DIN microphone inputs and speaker outputs
Auxiliary line inputs connections on rear.
Separate input level controls for mic and line
Replay volume, treble and bass controls
4 Speeds: 7.5 / 3.75 / 1.875 / 15/16 ips
= 19 / 9.5 / 4.75 / 2.4 cm/second
Maximum spool size: 7"
Power requirements: 110 / 220 / 245V AC

Have been informed that this is incorrect, I am currently selling it and would really appreciate if someone could clarify the correct spec please.
Many thanks.

[SA-Draadloos]

Unfortunately not much is correct in the info stated above :

The TK20 (which is a TM20 with an output stage) is a single-speed (3 3/4 IPS), two-track tape recorder with maximum spool diameter 5 3/4 in.
Power supply listed above is correct. EF86 - pre-amp ; ECC81 - two stage af amp; el95 - output ; em84 - indicator ; el95 - HF oscillator and a metal rectifier.

I once owned one of these - nothing amazing - it ended up in landfill (after I removed the valves).

James

[SA-Draadloos]

And here are two circuits for the machine! From the Tape recorder service manual :


I bought my machine for R20 which is about 1,8 POunds !!!! It was in excellent condition. But then again we do have Uncle Bob up North - sorry a bit OT

[quantum]

Other specs taken from Hellyer's Tape Recording Servicing Manual which might be of use to you (and of interest to a buyer):

Power supply: AC Mains, 110-120 and 200-250 volts, 50 Hz, 45 watts consumption approx.
Rewind time: 3.25 minutes
Wow and flutter: less than 0.25%
Frequency Response: 60-10,000 Hz
Special features: three digit revolution counter; automatic stop, metal foil operated