Realistic STA-780 (1985–1987)
A synthesized AM/FM stereo receiver from Radio Shack’s mid-1980s lineup, offering solid performance and digital tuning in a budget-friendly package.
Overview
The Realistic STA-780 is a synthesized AM/FM stereo receiver produced by Radio Shack under its Realistic brand from 1985 to 1987. Designed for entry-level hi-fi systems, it was marketed as “the perfect choice for your first system” in the 1986 Radio Shack catalog. It combines a digital synthesizer tuner with a musical amplifier section, delivering clean, balanced sound suitable for casual listening in a living room environment. The unit uses microprocessor-controlled precision tuning with a search mode and phase-locked loop circuitry for stable station reception.
Specifications
| Tuning range | FM, MW |
| Power output | 48 watts per channel into 8Ω (stereo) |
| Frequency response | 20–30,000 Hz |
| Total harmonic distortion | 0.04% |
| Signal to noise ratio | 72 dB |
| Speaker load impedance | 40–160 |
| Output | 140mV line |
| Dimensions | 420 x 120 x 270mm (17" x 5.5" x 12.5") |
| Weight | 18 lbs |
| Original price | USD $349.95 (1986) |
Design
The STA-780 features a digital synthesizer tuner with microprocessor-controlled precision tuning, including a station search mode. It uses phase-locked loop (PLL) circuitry for accurate and stable frequency locking across both FM and AM bands.
Market
A current listing on Reverb shows a used STA-780 priced at $149.99, labeled as “New Price,” suggesting residual market presence. Forum inquiries for service manuals indicate that repair and maintenance support may be needed for long-term operation.
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