>Key-down tuning for QRO is a no-no, as is RTTY. They spec the power supply at 22 amps -->> 25% duty cycle <<-- or 5 amps continuous. 12.5 volts times 5 amps is 62.5 watts. If one figures in the usual 50% efficiency of transistor rigs, that's 31 watts brick on key, a figure that will be need to set as a tuning power limit in an auto-tuner rig. Probably better to say 25 watts continuous and enough to drive an amp that drives with 50-60 watts, IF the amp can be tuned at half power. Otherwise, tuning the amp would require a pulser or string of dits. > >For a suitcase situation it would be ideal, just back the power off.
I have been using the small supply with my K3 all the time. No distortion or clicks heard or reported on SSB and CW at 100 watts out. A very neat package when combined with the SPE 1KFA lineal amplifier, that needs so little input power that even RTTY at 500 W out is of no consequence to the Gamma Research power supply limitation. 73 Reinaldo, YV5AMH ______________________________________________________________ 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
