Harman Kardon - HK 610 / TU 950 - Multiple models - - Catawiki
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Tuner Information Center - Tuner Reviews H-L
Harman Kardon TU909Digital Synthesized Quartz Locked FM Tuner | eBay
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Vintage Audio Exchange
Harman/kardon TU 970 tuner - Catawiki
stereonomono - Hi Fi Compendium - 13 years on-line: Harman/Kardon T403
