Ortofon TM-7
Not much is documented about the Ortofon TM-7. The record comes down to a single 1984 equipment directory entry: a stereo moving-magnet cartridge with an elliptical diamond stylus. HiFI-Stereo (1984, p.108) listed it alongside Ortofon's Concorde series models, which suggests it was part of the company's mid-1980s lineup. No production years, original price or detailed design notes have survived in the usual sources.
Known specifications from that directory entry:
- Type: Stereo cartridge, elliptical diamond stylus
- Frequency response: 20–20,000 Hz
- Output: 5 mV at 1 kHz, 5 cm/sec
- Separation / balance: 22 / 2 dB at 1 kHz
- Tracking force: 1.25 g
Beyond that listing, almost nothing else is recorded. If you own a TM-7 or have a manual, the Archive would welcome the details.
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