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HH Scott LK-60

Solid-State Stereo Amplifier (1968)

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HH Scott LK-60

Specifications

Power output: 40 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.6%

Damping factor: 20

Input sensitivity: 3mV (MM), 500mV (line)

Signal to noise ratio: 55dB (MM), 75dB (line)

Output: 500mV (line)

Year: 1968

Downloads

B operation/assembly manual   English - maraakate

B schematic corrections   English - maraakate

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Comments

re: LK-60

I got the LK-60 (non-B) manual and there are two changes compared to the original circuit:

* The 1000/65 can may be replaced by a 2000/75. The LK-60B mentions this in the manual with the asterisk. However, in the LK-60 there was a typed letter stapled to the page mentioning it may be different and the polarity.
* The mylar caps by the speaker outputs have been upgraded from 200V to 250V. I'm guessing it was an error on their part with compensating for outside of the US. The LK-60 manual calls them tubular capacitors, but the LK-60B calls them mylar.

Besides the faceplate mentioning LK-60B on the front and saying "VOL/COMP" instead of "V/L" for the loudness switch the rest of it is the same. Down to the wiring colours, the schematic (same revision and date), alignment instructions, and even the specs. Part numbers are exactly the same, with the exception of the mylar cap mentioned above. You can also see in the LK-60B manual I posted it mentions that dc is not "DC" but "dc" in the glossary (and a few other terms). The LK-60 manual does not mention this.

Beyond that, any regular LK-60 users out there can safely use the LK-60B manual with no issues.

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