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Duplexer 144-430
Il duplexer e' un circuito che permette l'uso contemporaneo di piu' frequenze utilizzando una sola discesa di cavo
post 24 Jul 2024
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144 & 432 MHz High IIP3 PA3BIY LNAs
When I first saw the article in , I was very impressed with the data and quality of the construction
222 Mhz Transverter for the FT-817
The transverter can be configured to work with the Flex-1500 SDR and other transceivers with transverter ports
50Mhz high gain antenna and masthead preamplifier
An efficient antenna system is a prerequisite for more successful six metre operationv
A Motor Drive for your Variometer
Everyone who has set up a low frequency base loaded antenna is aware of the very narrow bandwidth of the antenna system, and the seemingly constant need to retune the antenna
170
When I first saw the article in , I was very impressed with the data and quality of the construction
The transverter can be configured to work with the Flex-1500 SDR and other transceivers with transverter ports
An efficient antenna system is a prerequisite for more successful six metre operationv
Everyone who has set up a low frequency base loaded antenna is aware of the very narrow bandwidth of the antenna system, and the seemingly constant need to retune the antenna
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
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground