Heathkit AJ-2520
Not much is documented about the Heathkit AJ-2520. The one solid period record in the Archive is an equipment profile in Audio (March 1990, p.80), which reproduced the manufacturer's specifications for the model. From that listing, the AJ-2520 was an AM/FM tuner, with the FM and AM sections rated separately.
The known specs from that profile:
- FM usable sensitivity, mono: 10.8 dBf
- AM sensitivity: 15 µV
- AM signal-to-noise: 53 dB
- AM alternate-channel selectivity: listed, but the figure is cut off in the surviving scan
Past those figures, the material available to the Archive has no production years, original price, design details, or independent bench-test measurements. The magazine file also holds a High Fidelity "Currents" page from February 1989. That page covers video gear and doesn't mention the AJ-2520, so it adds nothing concrete here.
If you have a manual, catalog page, or review of the AJ-2520, the Archive would welcome the record.
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