If you're talking about the 21-534, it should do fine at least up through 30 MHz.
FWIW, I bought its great-granddaddy back in the 1970's (model 21-502A) and it still works fine. RS meters do everything an SWR meter needs to do, which is register a low SWR at a 50-ohm impedance match. Few SWR meters are very accurate above about 3:1 - even many "high priced" meters. If no one has messed with the power calibration, it'll do just fine for normal Ham use. Mine reads within 10% of more expensive meters from about 2 watts up through 500 watts, which, even among high priced meters is really good! Be sure you're checking for that short at the rear panel connectors on the SWR meter. The usual places for a short in a transmission line are at connectors on the cables, so remove any cables and adapters from the meter before checking. I don't have a schematic of the current bridge circuit, but if it's internal,it's possible the "short" at d-c isn't really a short at RF. If you just bought it, I'd take it back to the store and ask them to swap it or compare that 'short' with another meter. Ron AC7AC -----Original Message----- Im trying to calibrate my k 1 and bought a radio shack swr bridge. With a 50 ohm load I can tune without it but with it I get a dry high swr. I measured the coax connectors and get a short between the two coax centers and the grounds. It recieves ok but I can't get a decent tx reading. Anyone know fit is just too cheap to work for this? Thanks. Mark. N5MF T-Mobile. America's First Nationwide 4G Network. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
