....50 ohm non reactive 1/4 watt axial lead resistor maybe 1% or better. I have a couple of old amphenol bnc 240 ohm terminators that I want to repurpose to 50 ohm. I am having trouble finding a non reactive part thats good up thru 500mhz. Jeff Herr, WW6L 4636 Kelton Way Sacramento, Ca 95838 916.925.6089