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"By the way, I'm using an MFJ 872 Grandmaster watt meter. Reads AVG/PEAK, not pep." "Was told that the 31 watts I'm seeing on my meter (avg/peak) is actually around 54 watts pep, is that right?" 31W modulated AVG power = 82W PEP from the mfj872, 873 & 874 instruction manual: "Forward RF...

downloaded both of them and views were not recorded.

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nothing about it in the nanovna users manual. search = no results for "sawtooth" the original avanti astroplane patent with images...

resonance is adjusted by lengthening or shortening the top vertical element. swr on the feedline is adjusted by moving the 13" fiberglas spacer bar up and down between the two legs of the quarter wave matching section. you have to read the patent to actually figure this out, this information is...

This is a rather broad statement, yet there beyond the Capital of the nation stands a little portable house, the oak tree, a small receiving set and a couple of enlisted men and an officer on duty; and the curious may, with permission, hear for themselves that the signals so received are neither...

phased 20 meter 1/4λ verticals @ 1/8λ spacing & 135° feed. produces an inline cardioid pattern w/ 4.1 dB. of forward directivity & good to excellent (deep null) front-to-back signal rejection. cardioid azimuthal radiation pattern looking down from directly overhead of the array. according...

you can fool an swr meter just by increasing and decreasing transmitter power. let's face it. they're not laboratory grade precision measuring instruments. you can bring ground / loss resistance down (thereby increasing antenna radiation efficiency) by eliminating losses in your installation...

"But SWR? It is in the Feedpoint." Standing Waves are ON THE TRANSMISSION LINE. only two types of resistance and reactance (representing a complex impedance) are present at the feedpoint of the (load) antenna in the case of a non-resonant antenna. neutralizing the reactance at the feedpoint...

now things are beginning to make sense.

for J the (minus) - = capacitive reactance, no sign = inductive reactance. there is no "+". remember this? https://www.worldwidedx.com/attachments/20211115_124429-jpg.48392/

if you haven't seen 0.00J you haven't seen resonance. there's only two ways to proceed, either find the frequency where resonance occurs or change the length of the vertical element to find it. the first method will be easier. we can come back to swr when you find the frequency where (X)...

you're welcome.

hopefully you haven't made any antenna changes since 27.200000. show me 27.190000. when i say "antenna changes" that includes moving the vehicle or parking other vehicles in close proximity to your antenna.

muf us boulder right now is 25.54 mhz.. the muf right now is quite a bit higher over south america than it is here.

the answer to that question is solely dependent on the radiation efficiency, (or lack thereof) the spacing and the predominance of constructive interference over destructive interference between the individual antennas forming the final pattern based on the first two parameters listed above as...

from october to december of 1957 the sunspot number hit a record high* of 332. from january to march of 1969 the sunspot number hit a high of 170. from october to december of 1979 the sunspot number hit a high of 257. from october to december of 1989 the sunspot number hit a high of 220. from...

when using swr measuring equipment that requires a set reading calibration prior to measurement, USE ONLY THE MINIMUM AMOUNT OF POWER NECESSARY TO OBTAIN A SET METER READING. overall this procedure will produce a lower and more accurate measurement of the swr existing on the feedline. in the...

here you go. https://nanovna.rf.pl/Manuals/NanoVNA-User-Guide-English-reformat-Dec_9-19.pdf

just lower the set tuning frequency 10 khz. @ a time until J = +/- 0.00. that set frequency is the resonant frequency of the antenna. if you don't have a copy of the users manual let me know.