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Automatic Antenna Tuner Controller for 600 Meter
This article describes a fully automatic antenna tuning system for remote adjustment of a variable element in an antenna matching system
post 30 Sep 2024
Antenna Transmatch tuner Links →
T-match atu
500pf variable capacitors and a e roller inductor the variable capacitors with 3mm plate spacings are well capable of withstanding voltages of several kilo volts
Two versions of the SPC antenna tuner
The nominal values from the article are: C1, 200 pF; C2, 200 pF per section; L1, 28 microhenries, roller inductor
Using Auto-Tuners
When using an autotuner you donÂ’t necessarily have to use a resonant length of wire. In fact if you wish to use one for multiband operation it may be best to pick a length of wire which isnÂ’t resonant on any of the required frequencies
Z Match A Drop-Out Region
The Z match tuner can be resolved as a simple L network of series capacity and shunt inductance combined with an output coupling circuit
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500pf variable capacitors and a e roller inductor the variable capacitors with 3mm plate spacings are well capable of withstanding voltages of several kilo volts
The nominal values from the article are: C1, 200 pF; C2, 200 pF per section; L1, 28 microhenries, roller inductor
When using an autotuner you donÂ’t necessarily have to use a resonant length of wire. In fact if you wish to use one for multiband operation it may be best to pick a length of wire which isnÂ’t resonant on any of the required frequencies
The Z match tuner can be resolved as a simple L network of series capacity and shunt inductance combined with an output coupling circuit
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
Interface-for-digital-broadcasts-with-integrated-audio 4-port HUB, with a TUSB2046. With port 1 of the HUB we drive the FT232RL; with port 2 the PCM2904, furthermore, we decided to leave ports 3 and 4 free