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Sony TC-K81

Stereo Cassette Deck (1980-82)

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Sony TC-K81


Type: 3-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.8 cm/s

Heads: 1 x combination record/playback, 1 x erase

Tape Type: type I, FeCr, Cr02, Metal

Noise Reduction: B

Frequency Response: 20Hz to 20kHz  (Metal tape)

Signal to Noise Ratio: 65dB  (dolby B)

Wow and Flutter: 0.04%

Total Harmonic Distortion: 0.8%

Input: 77.5mV (line), 0.25mV (mic)

Output: 0.435V (line)

Dimensions: 430 x 130 x 290mm

Weight: 6.3kg

Year: 1980


service manual   English - Digger747

instruction/owners manual   English Deutsch Francais Espanol - scan80269

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Reviewed Apr 23rd, 2016 by gross_one

I bought mine in 1981, and am currently rejuvenating it after several years in storage. Absolutely the best cassette deck in it's price range at the time, and has stood the test of time well. The only problem I ever had was with TDK SA tape 'shrieking', which I fixed by using Maxell. Overall, an excellent unit!

Reviewed Jan 25th, 2016 by ilkkasuni

One of the most reliable and endurable pieces of hifi gear, I ever had. The TC-K81 humbly served me for two decades in heavy, very heavy use.

The TC-K81 was of Sony's top-of-the-line models, and considering the price tag, this tape deck was a bull's eye.

Very good frequency response, even when using standard ferro tapes. With Sony UCX-S and Metal tapes, excellent results. The multi-color peak hold level meters were almost ideal for recordings. The most critical ear just might have had something to say about the signal-to-noise ratio, or the utmost low tones reproduction below some 30...35 Hz. Still, the TC-K81 was a lean, mean recording machine.

For a 3-head deck, properly dual capstan. Fast and accurate functions, ease of use, even though quite noisy mechanism when switching from wind to playback etc.



re: TC-K81

Thanks a lot from France.
Hifi Engine help is great for audio repair in the world.
Best Regards

re: TC-K81

Thanks for this wonderful site, it's really like a life saver boat! for all of us who try to restore great audio equipment!
I found this deck on a garage sale for 15 bucks! I'll try to bring it back to life with this useful information! Thanks again!
Greetings from Mexico!

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