Pre-amplifier low frequency `` UP-8/1 ''.
Amplifying and broadcasting equipmentThe preliminary low frequency amplifier "UP-8/1" was planned for release in 1933 by the plant No. 2 NUPP NKPT. The amplifier "UP-8/1" is intended for radio broadcasting nodes with up to 200 radio outlets, has a preliminary and terminal stages and delivers power up to 8 watts to the load. The amplifier is powered by batteries, a two-collector dynamo or a V-8/1 network rectifier. The amplifier can be installed on a table or hung on a wall. The device has a volume control. The preliminary amplifier of the model is assembled on 3 radio tubes of the SO-118 type, and the final one according to the "push-bullet" scheme on 6 radio tubes of the UO-104 type.