one thing about using my contest station only a couple times a year, everything has to be checked and fixed..........
in running 5 watts output without modern instrumentation, i chose to measure what i could measure accurately, input power to the final tube (6W6). not being able to check SWR at this level, i stoked up the ol' worm warmer (single 211 PA) and configured the antenna tuner for a full voltage feed, tapped down the tuner coil to where i had a 1:1 SWR. this did require an extra variable cap in parallel with the one in the tuner. now to set power, as there is no intrinsic power adjustment, so i dipped the final, link coupled to the link coupled antenna tuner, and added resisters to the 6W6 plate circuit. at about 190 volts on the plate i had about 40 mills plate current, so assuming a 70% efficient plate tank........................5 watts output I do have a second method of checking output power, as i have an EICO 725, which measures 4 watts on the x1 scale and 5 watts on the x10 scale at this (or any other) power antennas are vital, i plan to use the station 120 up 130 over 1/2 wave inverted L, with a 5/16 wavelength counterpoise connected to the bottom of the antenna tuner coil. running QRP means less worry about receiving a jpg of the rig is available upon request mike w7dra ____________________________________________________________ 53 Year Old Mom Looks 33 The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried http://thirdpartyoffers.juno.com/TGL3141/4eb78ae3474d411a66e4st04vuc _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
