R-326 (P-326). Soviet military HF radio receiver.

R-326 is a “portable“ tube military HF receiver intended for range 1.0 -- 20.0 MHz. This is divided in 6 bands: Band 1: 1.0 - 1,92 MHz Band 2: 1,92 - 2,8 MHz Band 3: 2,8 - 4,3 MHz Band 4: 4,3 - 8,7 MHz Band 5: 8,7 - 12 MHz Band 6: 12 - 20 MHz Receives in AM,CW and SSB modes. R-326 can be powered by two KN14, 1,2 volt Ni-Cd heavy duty accumulators, or through its external power supply unit WS-2,5M (110 or 220 vac).