H.H. Scott 280 Mono Block Power Amplifier Just Serviced Fully Tested Excellent

The H.H. Scott 280 (or Type 280) is a rare, vintage 80-watt monoblock vacuum tube power amplifier introduced in the late 1950s. As the most powerful tube amplifier produced by the iconic American manufacturer H.H. Scott, it is highly sought after by audiophiles and collectors for its "Laboratory" series build quality and warm, vintage sound. [1, 2, 3, 4, 5]Key Features and Specifications

• Design Type: Mono-block power amplifier (requires a separate preamplifier, such as the matching Scott 121-C or 121-B, and must be purchased/used in pairs for stereo sound). [1, 2, 3, 4]
• Power Output: 80 watts. [1]
• Tube Complement: Uses 11 tubes per unit, typically consisting of:
• • (4) EL34 (6CA7) output tubes
  • (3) 12AX7 tubes
  • (2) 5U4GA rectifier tubes
  • (1) 6BX7 voltage regulator
  • (1) 6AL5 bias rectifier [, 2]
• Notable Features: Features dual-level inputs, a variable damping control, and an early form of "Dynamic Power Monitor" output protection. [1]

Current Status and ValueBecause of its rarity and historical significance to the golden age of hi-fi, the Scott 280 is considered an "ultimate grail" piece by vintage audio collectors. Original models command high prices on the secondary market (often thousands of dollars for a functioning pair), though unserviced units typically require complete electrical restoration—such as replacing old capacitors—to operate safely and optimally today. This was just updated where needed replacing coupling caps as well as others. It was fully tested and operates flawlessly. In great condition considering its age. You won't be disappointed. Its rather heavy so Shipping is $150