The R353 Proton is intended as a long range radio station, over 4000 km.
Although some authors consider it to be a predecessor of the R354, this is not true, it is a separate design.The R353 is designed as a full duplex radio. The storage of the broadgram is on a tape recorder made of thin steel plate.
Ranges
receiver 2,98 to 16,2 MHz (3 subranges)
transmitter 3,47 to 16 MHz (11 subranges)
Sensitivity 1 microV
Power 50 W
Power supply mains 90 to 240 V, 12 V AgZn battery
Dimensions 270 x 90 x 330 mm
Weight 12.8 kg
Source own collection
Although some authors consider it to be a predecessor of the R354, this is not true, it is a separate design.The R353 is designed as a full duplex radio. The storage of the broadgram is on a tape recorder made of thin steel plate.
Ranges
receiver 2,98 to 16,2 MHz (3 subranges)
transmitter 3,47 to 16 MHz (11 subranges)
Sensitivity 1 microV
Power 50 W
Power supply mains 90 to 240 V, 12 V AgZn battery
Dimensions 270 x 90 x 330 mm
Weight 12.8 kg
Source own collection