I want to work with amateur, low power, and/or pico satellites. I would like to use an Eggbeater or Turnstile antenna with my UHF 433 MHz radio, since those antennas are very cheap and easy to build and I don't have to care about yagi rotors. The space for the antennas is also limited.
I would also like to use an LNA next to the antenna, but I don't know how to bypass the LNA when transmitting. I know I need some sort of switch or relay, but I can't seem to find something useful in Google. I don't mind soldering something and building some filters!