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Sony TC-K700ES

Stereo Cassette Deck (1987-88)

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Sony TC-K700ES


Type: 3-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.8 cm/s

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

Motor: 1 x reel, 1 x capstan

Tape Type: type I, CrO2, Metal

Noise Reduction: B, C

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

Signal to Noise Ratio: 73dB  (dolby C)

Wow and Flutter: 0.025%

Total Harmonic Distortion: 0.8%

Input: 77.5mV (line)

Output: 0.44V (line)

Dimensions: 430 x 125 x 350mm

Weight: 8.4kg


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re: TC-K700ES

I have acquired this deck recently and find it to be a very well built and sturdy unit. I have done some tests with TDK SA tapes and with very slight bias tweaks am getting recordings indistinguishable from the original. Really well impressed with it. I love the solid 'thunk' sound when the transport engages!!

There has been one issue with it though, which I now have thankfully completely sorted. I found that the RW and FF to be quite slow and struggled. I did some searching around and then found that the issue is to do with old grease gumming up the reel motor gears. The transport is very easy to remove from the deck and then you need to unscrew the reel motor and rear transport pcb - allowing the reel motor to be extracted. I sprayed some cleaner into the little pendulum gears followed by some fine machine oil.
Once back together, RW and FF are now free as a bird again and have no probs winding - even on a full reel. That poor little motor must have been under stress for quite some time.

Anyway - just in case anyone else is having the same issue. This is a fairly easy fix.

re: TC-K700ES

I'm contemplating buying a TC-K700ES that seemingly has the same problem.

Did you by any chance take pictures of the disassembled transport, showing the progressive steps to get to the reel motor gears?

If so it would be very helpful if you posted them online, either here or on a site like AudioKarma.

Thanks for sharing your experience.

re: TC-K700ES

Thank you for this information. I had purchased this unit as a demo from a VERY high end stereo shop. (One pair of speakers they have sells at $12,000.0!). I've had the unit for many years of faithful service. Good cassettes provide incredible results.
I have to take the unit in for an overhaul, and am lucky to have a repair shop just down the street. (They even fix VCR's and MD units).
AS I mentioned, I've had the unit for decades of faithful service. You're actually fortunate to find such a device. I hope you enjoy it.

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