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a 5/8 antenna is incapable of self resonance (X ≠ 0) because of the excessive level of capacitive reactance present at the feedpoint and requires an L network at the input to dump the reactance and provide an input impedance compatible with 50 ohm feedline. 3/8 wl., 1/2 wl,, 5/8 wl., 7/8 wl, & 1...

"Ever hear of an anionic chamber? Guess what one of the things they can do with such a device... Thats right, measure direct antenna gain, and they can do it without knowing the antenna's efficiency and directivity. To say this can't be done is just plane wrong. Also, you can get the antenna's...

antenna gain is not determined by calibrated field strength measurements, only directivity. antenna gain can only be determined if both antenna directivity and radiation efficiency are known values. stay away from anyone talking about the gain of an antenna and not referencing both of these...

in this case (X = -6.11 ohms) the antenna is capacitively reactive @ 27.185 mhz.. the antenna is resonant somewhere ABOVE 27.185 mhz. the antenna is TOO SHORT for X=0 @ 27.185 mhz.. capacitive reactance can be cancelled and X set to 0 by adding inductance, i.e., lengthening the antenna and...

"The transistor Uniden used before the 1969 was the 2SC1307. It should work in that radio, and that's what you'll find in most 23-channel SSB CB models. Unless it's so old the final is in a metal package." here are the driver / final combinations that i have had success with over the last...

"Power to the amp and radio are direct to the battery with 8 ga wire." eliminate the ground line from equipment to the battery and ground the equipment directly to the nearest vehicle ground inside the cab. make sure there is no excess length in the positive line from the equipment to the...

M0GVZ posted: "20dB or almost 7 S points...." 6 dB. = 1 S Unit +60dB. = -13dB. +40dB. = -33dB. +20dB. = -53dB. 9SUnit = -73dB. 7SUnit = -85dB. 5SUnit = -97dB. 3SUnit = -109dB. 1Sunit = -121dB. 20 dB = 3.33 S Units.

antenna specialists / avanti PDLII antenna instruction manual http://www.cbtricks.com/ant_manuals/avanti/av122/graphics/pdl-2_av122_om.pdf

sp5it: those are not "loops," they're folded dipoles. looks like a variation of the .625 wl. DP-275-27, DEVANT SPECIAL manufactured by mosley.

with 25WPEP "INPUT" @ 48% efficiency the ensuing "OUTPUT" would be 12WPEP.

SUN SDR2DX Anyone out THERE!?- KB2UKA - Live Stream 10/20/21 KB2UKA http://websdr4.sdrutah.org:8904/index1a.html?tune=14248usb

"Is there a true wideband antenna that will go from 0 to 1200 mhz? Or will I need two, one that can pick up 24 mhz and up...." antenna specialists / avanti av-801 astro scan covers 25 - 1200 mhz..

better on 10m than 11m..

never say never.

the straight line distance is 1,631.92 statute miles.

skywave ionospheric propagation of high frequency radio (TEM) signals.

if you're looking for openings into specific areas of the country or the world you may want to try monitoring the 10 meter beacons in and around the areas you are interested in. 10 METER BEACON LIST TEN METER PROPAGATION BEACONS 2 October 2021 14:02 UTC https://www.qsl.net/wj5o/bcn.htm Ham...

not likely.

RM Italy KL 503 Mobile Linear Amplifier Frequency - 20-30 MHz Input current - 12-14 A Input power - 1 - 6 W Input power SSB - 2-12 W Output power - 250 W Max Output power SSB - 450 W pep Max Mode - AM-FM-SSB-CW

the "power knob" introduces different values of resistance between the amplifier input and the transistors to selectively pad or reduce the input from the radio or exciter. a lower power setting usually eliminates the crunch.