1976 LOMO UP-25 Vintage tube microphone preamplifier [Very rare]Made in the USSR

Description

Here is the rarest Soviet microphone preamplifier. Based on three Soviet tubes: 1PCS 6G32P [analogue of EF86] and 2PCS 6N3P [ECC85 / 6L12]. The up25's signature features are clearly defined
At low frequencies, making them sound fat
And give a warm sound.
UP-25 LOMO YP-25 / UP-25 PREAMP . A very rare Soviet tube microphone preamplifier LOMO UP-25 is on sale. Very good condition. Full set with original lamps. 1976 Tube preamplifier LOMO UP-25 [very rare] Made in the USSR.  Designed to amplify signals from microphones. Such a preamplifier, in this design you will not find anywhere else, these are the Latest from Mohicans, only Old school ))) In connection with the cancellation of air travel, delivery may take 2-3 months. Kovid-19
The amplifier    has 4 stages. The first stage is assembled according to the resistor circuit on the pentode L1-6G32P. Two subsequent resistor cascades on the left and right triodes of the L2 6N3P lamp, the last stage is a complex cathode follower with sequential switching on of the triodes of the L3 6N3P lamp in which the second triode serves as a controlled dynamic cathode load for the first triode. The use of the pentode 6G32P in the first cascade made it possible to obtain, firstly, a small level of interference when operating the MICROPHONE, and secondly, a large gain factor. The latter requires deep feedback.