Plugged it in and turned it on one time. Front light came on and something lit up on the left side when looking down and facing the unit.

Eico ST70 Stereo Integrated Tube Amplifier. Is tube amp0 was recently rebuilt and has NOS tubes – everything works perfectly. Released in the early 1960s, this 70-watt (35 watts per channel) classic audio component is highly regarded by audiophiles for its warm tone and robust transformers.

Vintage EICO HF-12 12-watt mono tube amplifier, previously modified from its original hi-fi configuration for apparent guitar/instrument amplifier use. This is an interesting restoration or further-conversion project for a tube guitar amplifier builder or vintage audio enthusiast. CURRENT CONFIGURATION – Original EICO HF-12 chassis, enclosure and transformers. Original four-position input selector removed and replaced with a front-mounted 1/4-inch input jack. Three remaining front controls: volume, bass and treble. Original rear audio inputs removed. Rear 1/4-inch speaker output jack added. Original speaker terminal strip remains, with altered connections. The 8-ohm terminal is presently unwired. Original decorative front faceplate is missing. Replacement Mallory electrolytic capacitors installed. Three-prong grounded-style power cord installed, but protective grounding has not been verified as satisfactory. Other previous wiring and component changes are visible. ELECTRICAL TESTING PERFORMED The amplifier has NOT been powered up or audio-tested. Resistance and continuity measurements were performed with a multimeter. Output transformer: – Primary end-to-end: approximately 341 ohms – Primary halves: approximately 187 and 154 ohms – Secondary G-4? : approximately 0.9 ohms – Secondary G-16? : approximately 1.3 ohms Power transformer: – Primary: approximately 40 ohms – Heater winding: approximately 0.4 ohms – High-voltage secondary: approximately 205 ohms total – High-voltage secondary halves: approximately 105 and 98 ohms No open windings were identified in the circuits measured. These are resistance/continuity measurements only and do not establish transformer performance under operating conditions. IMPORTANT ELECTRICAL CONDITION The three-prong power cord was checked for continuity between its grounding pin and the metal chassis. Meter lead resistance: approximately 0.2 ohms – Grounding pin to chassis: approximately 2.5-2.7 ohms The protective chassis-ground connection requires further inspection and verification. The power wiring, capacitors, previous modifications and overall electrical safety have not been fully evaluated. DO NOT CONNECT TO AC POWER UNTIL PROPERLY INSPECTED AND SERVICED BY A QUALIFIED TUBE-AMPLIFIER TECHNICIAN. RESTORATION POTENTIAL The EICO HF-12 originally used a push-pull EL84/6BQ5 output stage rated at 12 watts in its factory configuration. The existing instrument-style conversion offers an interesting starting point for a vintage guitar amplifier project. Actual instrument input characteristics, operating condition, output power and sound have not been verified. The amplifier could also be considered for restoration toward its original hi-fi configuration. This would require sourcing missing controls, connectors and faceplate components, tracing the wiring and making appropriate circuit repairs. Not represented as a working or electrically safe amplifier. Includes the amplifier and installed components as photographed. No additional accessories are represented as included. Please review the detailed photographs of the chassis, underside wiring, transformers, controls and connections.

Photos represent item and condition best. Top tuner model powers on. Bottom unit powers on intermittently. I do not have the capability to test beyond that.

See photos to determine condition.

120 volts AC input US voltage.

Eico HF-87 Stereo Tube Amplifier. Track Page Views With.

Vintage EICO HF-20 Hi-Fi Audio Tube Amp Amplifier. This unit is in fair physical condition for its age. See pictures for details. Review details and photos for the best description. Description is based on previous knowledge, experience and research.

Vintage Eico HF-20 Tube Audio Amplifier – for parts / not working Experience the vintage charm and impeccable sound quality of the Eico HF-20 Tube Audio Amplifier. This tube amplifier is a true classic and is perfect for collectors and enthusiasts who are looking for a restoration project.

Estate Find, older couple downsizing. They said they haven’t used the stereo in years but it was magic when they did. You get the pair of Eico HF-60 power amps. See photos, what you see is what you get. I have a HK Citation IV preamp listed that was part of this stereo. I did not try to plug these in to test. Tubes will be removed and packed securely. Close serial numbers 7379, 7381.