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This appraisal is provided for informational and educational purposes only and does not constitute a certified, licensed, or formal appraisal.
Appraisal values are estimates based on submitted information, publicly available data, and input from InstAppraisal community, and may vary due to condition, provenance, regional demand, or additional information.
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AI Appraisal: Quick Scan Jan 2, 2026 2:12 PM
🤖 AI-POWERED EXPERT APPRAISAL
Informed by 25+ years of real InstAppraisal history
🏛️ Archive-Informed AI — Powered by InstAppraisal's 25+ years of appraisal expertise
Confidence Level: 85%
Heathkit SB-220 Linear Amplifier Appraisal
Physical Description: The Heathkit SB-220 is a linear amplifier featuring a distinctive green front panel with a textured finish. It measures approximately 14 inches wide, 6.5 inches high, and 10 inches deep. The unit is constructed primarily from metal, with an aluminum front panel and a perforated metal chassis for ventilation. Key identifiers include the Heathkit logo and model designation (SB-220) prominently displayed on the front. The amplifier includes several large control knobs for tuning, load, and band selection, as well as dual analog meters for plate voltage and current readings.
Condition Assessment: The unit appears to be in good working condition, with minor cosmetic wear such as light scratches on the front panel and some dust accumulation on the chassis. The knobs are intact and functional, and the meters are clear and operational. No significant rust or corrosion is observed, indicating it has been well-maintained.
Historical Context: The Heathkit SB-220 was produced in the 1970s by Heath Company, a well-known manufacturer of electronic kits and equipment. Heathkit was popular among amateur radio enthusiasts for its high-quality, user-assembled products. The SB-220 was designed for amateur radio operators and is capable of delivering 2 kW of output power, making it a sought-after model during its production period.
Collector Appeal: Collectors value the Heathkit SB-220 for its robust design, performance capabilities, and the nostalgia associated with building and using Heathkit products. The amplifier represents a significant era in amateur radio history, where DIY culture thrived. Its rarity and the demand among vintage radio collectors contribute to its appeal.
Interesting Facts: The SB-220 was one of the first amplifiers to use a solid-state relay, which improved reliability and performance. Its design allowed for easy modifications, making it a favorite among hobbyists who enjoyed customizing their equipment.
Comparable Sales:
Valuation Range: Based on current market trends and comparable sales, the estimated value of the Heathkit SB-220 is between $500 and $700.
Confidence Score: 0.85
Disclaimers: This is not a certified appraisal and must not be relied upon for insurance, legal, tax, or estate purposes.
💰 ESTIMATED VALUE
$500 - $700
📖 How This Appraisal Was Created
This appraisal was generated using AI analysis informed by InstAppraisal's 25+ years of archived appraisals, market observations, and community expertise. Unlike generic AI tools, our system is grounded in decades of real-world appraisal data collected on this platform.
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