BBC TV/21 Trap Valve Amplifier
BBC TV/21 Trap Valve Amplifier, c.1943. A 2 valve push-pull amplifer used for feeding ring mains and recording rooms distribution. Variable gain. Output up to 4dB into 10 Ohms. Ex BBC Bristol. Full BBC number is TV/12/8. Bristol number is J2181. Dirty and some corrosion on top.