Model #10 with direct wire, model #20 with a curved wire
Antenna "Isotron" ranges for 14-30 MHz
Table 1
Model # 10 11 12 Height, Width, Depth: mm 406x292x102 406x292x102 533x292x102 The width of the band: 1Mhz * 1Mhz * 450khz * Coaxial cable: 50-75 ohms 50-75 ohms 50-75 ohms Frequency: 28-30 Mhz 40 channel CB The entire range Input power: 1000 PEP** 1000 PEP** 1000 PEP** 
Model #20 with a curved wire
Antenna "Isotron" ranges for 14-30 MHz
Table 2
Model # 15 17 20 Height, Width, Depth: mm 533x292x102 533x292x102 533x203x102 The width of the band: 450khz * 450khz * 350khz * Coaxial cable: 50-75 ohms 50-75 ohms 50-75 ohms Frequency: The entire range The entire range The entire range Input power: 1000 PEP** 1000 PEP** 1000 PEP** 
Sketch the design of the antenna
Antenna "Isotron" 80/40 COMBO
Publication: N. Bolshakov, rf.atnn.ru