Russian 6C4P-EV kenotron tube, two-anode. Designed for rectification of alternating current of industrial frequency 50Hz. Equivalent to: 6Z4, EZ90, 6Z31, SV4005
A very rare Russian audiophile GM-70 triode output tube with a copper anode. Manufacturer: ULYANOVSK. Excellent sound quality, high power! Almost equivalent to an 845 tube. NOS.
Triode tube 6S3P-DR - HF amplifier in input stages. Low noise level and long service life. Close analogs of tubes: W417A, EC86, PC86 (different pinout)
Russian tetrode tube GU-74B are direct replacements for use in some of the best-built RF power amplifiers, including Alpha 99, 91B, 8100; ACOM 1000, 1006, 1010, 2000A. Fully equivalent to the modern 4CX800A tube
Russian tube 6P3S REFLECTOR factory, output beam tetrode. Best quality, the sound is nice - authentic vintage tone. Near equivalent: 6L6, 6L6GT, 6L6GC and 5881
