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J-Pole Problem: Great at Low Pwr, No-Go at High Pwr
I have a rather odd problem with a J-Pole "copper cactus" antenna that I
just installed this evening. I can transmit and hit local repeaters w/o any problems w/ an HT on LOW power ( 1.5W) but can't bring up even the closest repeater on HIGH power (4.5W). The SWR for the antenna is 1.1:1 to 1.3:1 across the entire 2m band (direct antenna reading - not w/ the transmitter in the loop) and I've got a 5-coil balun right at the feedpoint to trap any return RF. Any suggestions? It wasn't my intention to build a QRP rig.... Perplexedly, Scott Drumm N3XFD |
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