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Simple electronic keyer
Speed range of 5 to 30 wpm operates in either iambic A or B mode, with B being the default 2 message memories
post 11 Nov 2024
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Antan un analyseur d'antennes compact
The best analysis of an antenna, for a correct adjustment, is done at its feed point, without passing through the cable or the power line
Antenna height measurement made easy
First we must understand the triangle: if the angles are like this 90 and 45 then length A and B are equal
Antenna YAGI 3X3 Cross SATELLITI
Questa antenna e' un miglioramento della mia antenna YAGI+TURNSTILE per traffico satelliti
Antenna Construction Hints
Homemade Satellite Antenna
a small 70cms antenna that could be pointed at the satellite
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The best analysis of an antenna, for a correct adjustment, is done at its feed point, without passing through the cable or the power line
First we must understand the triangle: if the angles are like this 90 and 45 then length A and B are equal
Questa antenna e' un miglioramento della mia antenna YAGI+TURNSTILE per traffico satelliti
a small 70cms antenna that could be pointed at the satellite
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