Product Overview
Dual 2-Watt Audio Power Amplifier in 14-Pin Batwing DIP Package
Condition
New old stock in unopened vintage packaging. The component is sealed inside its original retail blister card with intact pinout diagrams and application schematics on the reverse side. Lead pins and integral batwing heatsink tabs are clean and untinned.
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Product Overview
The Archer 276-630 (marked RS-2277 with date code 7345) is a dual monolithic linear audio power amplifier integrated circuit packaged for Radio Shack / Tandy Corporation. Designed to deliver 2 watts of continuous power per channel into 8-ohm or 16-ohm loads, this linear IC operates across a wide direct-current supply voltage span from 9V to 30V DC (18V nominal). Each internal channel incorporates a Darlington differential input pair offering high input impedance alongside an active electronic ripple filter to minimize hum in low-noise audio applications.
Key Features
- Output power: 2.0 W continuous per channel into 8 or 16 ohms
- Operating voltage range: 9 V DC to 30 V DC (18 V DC nominal)
- Package type: 14-pin batwing DIP with dual integrated copper heatsink tabs (pins 3-5 and 10-12 ground)
- Input impedance: 3 MΩ minimum, 20 MΩ typical
- Open-loop gain: 55 dB minimum, 72 dB typical
- Frequency response: 50 Hz to 20,000 Hz
- Total harmonic distortion: 0.75% typical at 2 W output, 0.05% typical at 0.5 W output (1 kHz)
- Internal capacitance multiplier ripple filter circuitry
Applications
- Servicing period audio electronics including phonographs, tape recorders, and AM/FM receivers.
- Bench repairs for vintage intercom stations and sound projector monitors requiring an RS-2277 or direct equivalent.
- Hobbyist breadboard audio projects, active monitor speaker builds, and custom analog synth amplifier modules.
Frequently Asked Questions
What power supply voltage is required for rated output?
The IC is rated for operation from 9V to 30V DC, with standard test performance documented at 18V DC into an 8-ohm load.
What is the purpose of the center metal tabs on the housing?
The center batwing tabs connect directly to internal circuit ground (pins 3, 4, 5 on one side and pins 10, 11, 12 on the other) to provide chassis or printed circuit board ground heatsinking for thermal management under load.
Are schematic diagrams included with this IC?
A full component application schematic and external pinout diagram are printed directly on the reverse side of the card.
Why buy this unopened vintage IC instead of sourcing bulk pulled stock?
Chasing old linear amplifier ICs often leaves you with pulled parts that have heat damage or clipped leads. This is a single, authentic Radio Shack component in unopened original card packaging with clean factory pins, ready for your restoration or custom audio build. Orders ship for $8 flat rate, qualify for free shipping at $28, and leave our Idaho warehouse the same or next business day.
Nothing revives a classic audio bench like the clean gold pins and honest silicon of an unopened vintage build. Drop it into your chassis, power up the rails, and let the music speak for itself.
