HF-60 mono EL34 power amplifier. Serial # 4021. Has the legendary Acrosound TO-330 output transformer.

Amplifier is in very good cosmetic and operational condition.

All tubes test good. Tube compliment- Philips EF-86; Raytheon 6SN7;
Svetlana winged-C EL34; vintage Japanese 5AR4.

Cosmetics---
--The amplifier is very clean.
--No user modifications, no extra holes drilled, etc.
--Paint & printing very good. A few scuffs/chips here and there.
--No signs of corrosion. Hardware (screws, fittings) is clean and shiny.
--Has it's bottom plate, but no top cage.

This amplifier has been serviced---
--All transformers DC resistances checked. All are within spec, no open or shorted windings.
--Original power supply HV electrolytics tested and re-formed; all within spec.
--All signal capacitors replaced with new or good vintage caps.
--NOS, mil-spec, hermetically sealed PIO caps (Vitamin-Q type) used in output section.
--All caps passed leakage tests.
--All out-of-tolerance resistors replaced.
--Bias rectifier replaced with modern silicone diode.
--All controls and connectors cleaned and lubricated.
--Bias controls adjusted. Comes with schematic.

This amplifier is in full, operational condition---
--Power consumption- 1.15 amp @ 115VAC.
--Audio power checked (input- 1.6Vrms 1kHz sine wave)- ~56 watts into 8 ohm load before clipping.
--Output sine wave is clean; clipping is symmetrical with no ringing or artifacts.

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