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Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

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VHF ATU

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ANTENTOP- 01- 2017 # 021

Several Universal ATUs for the Whole Amateur HF Band

 

 

 

Figure 9 The universal ATU with 2-pole 3-position switch

 

 

The C part of L1 should have up to 15 turns for more effective ATU work on 1.9 and 3.5 MHz. To match antenna in most effective way it needs vary the tap from L1 to C1. This tap should be tapped from 5 to 10 turns from ground as it shown in Figure 10. Any of the ATUs do good matching job. However, the ATU selected for operation on the ham radio station will depend on the matching requirement for the Band of operation chosen and the antenna used. The most universal ATU is shown in Figure 10.

 

 

 

Figure 10 Universal ATU

 

 

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Last Updated:

December 17, 2017 13:56

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