At 3/3/2010 14:19, you wrote: >skipp025 wrote: > > The more famous surplus commercial radio 224 MHz conversions > > replace the PA with a Hybrid RF Amplifier Module... wonder if > > they also include SWR Protection?
>In the case of the GE MASTR II, power control is done with a simple pot, >and all SWR protection, leveling, etc. is bypassed/eliminated - at least >with this interface board. Maybe someone has hacked the MASTR II PA to >allow for the incorporation of its protection in a 220 conversion - but >I have never saw it if it has been done. > >Kevin Custer Most RF power modules sold today are spec'd to withstand 20:1 VSWR. That's a lot of reflected power, probably more than what you'd ever see if your repeater antenna opened or shorted due to the feedline & duplexer losses. Bob NO6B
