Rightrik wrote:

Hello, i need a little, low power (about 500 mA) step up converter from 12 v
dc to 24 v dc to operate correctly a 4 ways coaxial switch.
I have found project on the net, but i wonder if there is a ready, little,
not ott expensive kit or ready-to-go-module to obtain this 24-26 v dc
voltage from 12 (13,8) dc volt input.

Thank you,
73 de Riccardo IK5WQO




They are available. There are some for mobile police computers for example.
Also look for a 12 to 12 volt with isolated 12 volt output. You can use
the output in series
with the input to get the 24 volt. And a 12 to 8 or so may be OK as many
relays
will work with less than the full 24 volts.

Good luck.
Bill K7NOM