South Midlands Communications Group

TA Series - HF Antenna Matching Transformers

TA Series

The TA series of transformers are rugged and lightweight, ideal for inclusion in transportable HF antenna systems. Combinations of power rating and impedance transformation ratio provide the antenna designer with a wide selection of units to complement most antenna configurations.

  • Broad band 1.5 to 32 MHz
  • Power - 50 Watt to 1 kW
  • Lightweight fibreglass body
  • Transportable application

The transformers are housed in extremely strong fibre glass bodies, hermetically sealed with low loss resin and suitable for any environment. The input coaxial connector is protected within the specially formed body and the transformer itself is grounded as an added protection against static and lightning induced EMF’s. A spigoted version, type TAS, is available for use with the SMC range of masts.

Balance Impedance for TA and TAS Series

av. power: 50 Watt i/p imp: 50 Ohm unbalance
50 Ohm TA5-55
75 Ohm TA5-57
200 Ohm TA5-520
300 Ohm TA5-530
370 Ohm TA5-537
450 Ohm TA5-545
600 Ohm TA5-560
800 Ohm TA5-580
av. power: 150 Watt i/p imp: 50 Ohm unbalance
50 Ohm TA15-55
75 Ohm TA15-57
200 Ohm TA15-520
300 Ohm TA15-530
370 Ohm TA15-537
450 Ohm TA15-545
600 Ohm TA15-560
800 Ohm TA15-580
av. power: 400 Watt i/p imp: 50 Ohm unbalance
50 Ohm TA40-55
75 Ohm TA40-57
200 Ohm TA40-520
300 Ohm TA40-530
370 Ohm TA40-537
450 Ohm TA40-545
600 Ohm TA40-560
800 Ohm TA40-580
av. power: 1kW
i/p imp: 50 Ohm unbalance
50 Ohm TA100-55
75 Ohm TA100-57
200 Ohm TA100-520
300 Ohm TA100-530
370 Ohm TA100-537
450 Ohm TA100-545
600 Ohm TA100-560
800 Ohm TA100-580
av. power: 400 Watt
i/p imp: 50 Ohm unbalance
50 Ohm TAS40-55
75 Ohm TAS40-57
200 Ohm TAS40-520
300 Ohm TAS40-530
370 Ohm TAS40-537
450 Ohm TAS40-545
600 Ohm TAS40-560
800 Ohm TAS40-580
av. power: 1kW
i/p imp: 50 Ohm unbalance
50 Ohm TAS100-55
75 Ohm TAS100-57
200 Ohm TAS100-520
300 Ohm TAS100-530
370 Ohm TAS100-537
450 Ohm TAS100-545
600 Ohm TAS100-560
800 Ohm TAS100-580


Frequency 1.6 - 32 MHz
Input Impedance 50 Ohm unbalanced
Output Impedance See above
Average Power 50 W, 150 W, 400 W, 1 kW
Max Peak 4 X Average power
VSWR Less than 1.3 : 1
Max. load VSWR 3 : 1
Insertion loss Less Than 0.25 dB
Balance ratio Greater than 26 dB
Temperature range -40ºC to +70ºC
Connectors BNC, N, UHF, C
Configuration Fibre glass body Stainless Steel arms (chemically blackened).Low loss resin fill. Drab olive green or light sand epoxy paint finish.


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