Weiterführende Informationen:

Very Rare and Collectable, the Holy Grail of Vintage Tube Amplifiers!

Radford Electronics is a British audio manufacturer from Bristol, founded by Arthur Hedley Radford in 1946. Radford’s hifi amplifiers enjoyed a reputation for quality that was “second to none”, especially because of their output transformers.

STA25 Specifications:

Power (1% THD): 36W

Power (0.1% THD): 25W

Bandwidth (-1dB):

1W: 20Hz – 60Khz

25W:  20Hz – 40Khz

36W:  25Hz – 25Khz

Weight: Approx 17Kg

Size (WxDxH): 36x25x22cm

Supported AC voltages: 110, 125, 140, 220, 235, 250

AC frequency: 50-60hz

Impedance settings: 4Ω, 8Ω, 16Ω

Speaker connection: Binding Posts

Rise time: 5μS

Input sensitivity: 500mV

input impedance: 100kΩ

Output impedance (8Ω configuration selected): Approx 0.3Ω

Valves:  GZ34, Mullard E34L, 6U8 / ECF8,  EF86 / 6J32P

Date of manufacture: 1965

Made in England