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This is a source run for an inverted L antenna for 80m that is 43 feet
vertical and 23 feet horizontal. What would be the simplest matching network to use to produce a flat match. My primary use would be 80m low angle work at 3.7 and 3.5 Mhz, but also want to be able to use it (with a tuner, of course) for a local net at 3.97 megs. While a 1.7:1 vswr at resonance is usable, I would like to get my starting point as low as possible to maintain some sort of reasonable vswr at the band edges, for those times when I need to check into the net. By simple I mean no caps...they are not all that easy to find (in a hurry) any longer. I need power handling of 500w. My two thoughts are some sort of 1/4 wave transformer (although that's a lot of coax), or a simple toroidal transformer. Any suggestions? Core material for the toroid (including availability), turns ratio, etc? Or is a toroid a bad idea for this app? TIA, ....hasan, N0AN EZNEC ver. 3.0 Vertical over real ground 5/28/2005 6:39:29 AM --------------- SOURCE DATA --------------- Frequency = 3.71 MHz Source 1 Voltage = 29.15 V. at 0.61 deg. Current = 1 A. at 0.0 deg. Impedance = 29.15 + J 0.308 ohms Power = 29.15 watts SWR (50 ohm system) = 1.715 (75 ohm system) = 2.573 |
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