【Product Overview】 The ORC-44 is a vacuum tube RC low-frequency oscillator manufactured in 1966. It features an analog meter and output terminals. It uses vacuum tubes and provides a unique sound quality. 【Technical Features】 Manufactured by Kikusui Electronics Corporation, it is characterized by a reliable design. It is also equipped with a power on/off switch, designed for ease of use. 【Applications】 Suitable for adjusting audio equipment, etc., and is especially ideal for audio enthusiasts seeking a retro sound quality. - Model: ORC-44 - Manufacturing Year: August 1966 - Serial Number: No. 202 - Manufacturer: Kikusui Electronics Corporation - Power: Power on/off switch - Output Terminals: Output terminals available - Meter: Equipped with an analog meter - Vacuum Tubes: Uses vacuum tubes Although some model numbers are unidentifiable? It is composed of 4 tubes. 12BH7A 12AU7 6AU6----Low noise type ??6E---12AX7 U7 T7 type Operation is confirmed by connecting alligator clips to the components in the photo and outputting to the aux terminal of an audio amplifier, and then checking the oscillation sound. Output from the 600-ohm output terminal is also OK. Waveform confirmation has not been performed with an oscilloscope, etc. The ground terminal is damaged. The contact of the frequency selector switch is sometimes poor. The output volume has some scratchiness. The frequency dial turns smoothly. (The shaft has been cleaned and maintained) Thank you for viewing. 36000→29850→25500→23800→21800→19500