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Installing a Ladder Line to the house
On Thu, 8 Jan 2009 08:50:33 -0500, "Ed Cregger"
wrote: "Dave" wrote in message om... Bob Miller wrote: I've had good luck bringing 450-ohm line through the window using MFJ's 4602 window feed through board. It has ceramic feed through insulators for the balanced line, more feedthrough's for a random wire, three coax lines and a ground wire. Even includes weather stripping and a burgler bar. Bob k5qwg That's through a window, not through a wall. I use the MFJ myself. If I did want to use non-resonant antennas I would locate a tuner at the antenna feedpoint, not at the generator (transmitter). Then you would cheat yourself of a fair amount of propagation and some of the lower and higher frequencies available with such a set up. You're not going to keep RF out of the shack, regardless of which system you use. FYI my 80 meter dipole with ladder line all way to the indoor tuner does not emit RFI in the shack that I can notice, even when put into all band use. bob k5qwg You might be able to keep some of the hot spots outside, but often times they are close enough to the station that it is really a waste of time. This fascination with resonance is a leftover from CB thinking. How many warships utilize resonant antennas? Yet they communicate the world over. The aversion to transmatches is a ham cultural trait that has no basis in reality, just as the CB'ers are hooked on resonant 50 ohm antennas. It's a characteristic of the culture(s) of both types of operators, with no basis in practical operating engineering. Ed, N2ECW |
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