This is a fantastic little vintage mono tube amp. Really nice condition for its age. Great for mono records, or to complete your monoblock stereo pair.
Production
1957-60
Condition
7/10
Orig. MSRP
$35.50
Restoration
- Full service check
- Cleaned controls and switches
- Repaired power supply and checked capacitors
- Repaired signal path capacitors
- resoldered poor connections
- New Knobs
- Detailed
Factory Specs
Power output 20 watts per channel into 8Ω (stereo)
Frequency response 20Hz to 20kHz
Total harmonic distortion 1% (at 3 db below rated output)
Input sensitivity 10mV (mic), 7mV (MM), 80mV (ceramic), 600mV (line)
Bass Controls 15db boost, 15 db cut (at 30 cps)
Treble Controls 15db boost, 20 db cut (at 15 kc)
Valve complement 12AX7, 12AU7 (2), 6L6G, 5V4G (rectifier)
Dimensions 14 x 8 7/8 x 7 3/8 inches
Power Requirements 110-125 volts AC at 50/60 cycles
Weight 23lbs
The History of Heathkit
The Heath Company was founded as an aircraft company in 1911 by Edward Bayard Heath with the purchase of Bates Aeroplane Co, soon renamed to the E.B. Heath Aerial Vehicle Co. Starting in 1926 it sold a light aircraft, the Heath Parasol, in kit form. Heath died during a 1931 test flight. The company reorganized and move...
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Liner Notes
The Heathkit model A-9C Amplifier offers you the least expensive route to real high fidelity performance. It employs push-pull 6L6 tubes to provide full 20 watt output. The preamplifier, main amplifier, and power supply are all on one chassis. Thus one compact unit fills the need for a good high fidelity amplifier with only a minimum cash investment. Designed primarily for home installations, the model A-9C is also capable of fulfilling public address requirements. It has excellent gain characteristics and full 20-watt power output. The preamplifier section features four separate inputs, each properly compensated and selected by panel-mounted selector switch. It has separate bass and treble tone controls, each offering 15 db boost and cut. It employs twin-triode miniature tubes in preamplifier, tone control, and phase splitter stages for low hum and noise levels. The output transformer is tapped at 4, 8, 16, and 500 ohms to match most any speaker system. The power transformer is shielded and is one of the heavy-duty "potted" type. A detachable front plate is employed on the model A-9C so that the plate can be removed and installed on the outside of the cabinet where the shafts protrude through, for custom installations. Ease of kit assembly has been assured by supplying a detailed step-by-step instruction manual with the kit. A specialized knowledge of electronics or wiring techniques is not required. This amplifier is a true high fidelity unit, covering 20 to 20,000 CPS within ± 1 db. Total harmonic distortion is less than 1% at 3 db below rated output, and the quality of audio output available is excellent. A fine unit with which to start your own hi-fi system.
Stock No.
6618214105256
