Today HK is still making high end equipment and computer / auto audio components. The 330 and 330A were all transistor, but in the mid 1970's 330B incorporated one integrated circuit, a Motorola IF amplifier unit. The HK 330 series was an entry level receiver (20 watts/channel) and Harman Kardon was always you get what you paid for company so extras were few in number yet quality was maintained. The model you see below was a high school dream when I got interested in electronics. In early 1960's Fisher Radio would incorporate true multiplex stereo which we have today. Brochure, Version 1, sales brochure, shirt pocket size, 8 pages folded: Re-Mastered reprint in color: 25.00: Original in very good condition 40.
In Los Angeles there was a classical music station was KFAC and they were in am and fm broadcasting the same material for this simulcast stereo. RCA-Victor R32, RE-45 & R52 Radio-Electrola. From the latre 1950's until the end of the 1960's many station would be am and fm for simulcast stereo. Harman Kardon first implemented simulcast stereo by having separate am and fm tuning sections so you can hear the am on one channel and fm on the other channel. Harman Kardon began during the late 1950's at the beginning of high fidelity tube am/fm equipment.
Harman Kardon (HK) 330 series stereo receivers. Not really a transistor radio but one of the last all transistor receivers.
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