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Flagpole ant:
Needs a good radial system to work. Slit grass with some type of spade and tuck in radials to avoid detection.
Needs an insulated feed to avoid ugly feed gizmo.
Also needs a tuning network right at the base. It could be buried if it had to.
R29 -j66 is not what I suspected as being the problem. That is a very low impedance for a tuner to deal with and is made worse because of the 4:1 balun ratio.
Just lose the coax and see what happens.
Make up a 1:1 ugly balun just for the low bands. You can swap between the 4:1 and 1:1 to get...
The symptoms might be there if the combination of feedline and doublet puts the load at the tuner at a very high impedance.
Try adding or subtracting feedline OR doublet length. Add 8 feet to the feedline OR 16 feet to the doublet as a starting point.
The extra feedline can be managed by...
If you google "T network tuner" a whole bunch of stuff shows up.
Here's something worth looking at
Impedance Transforming T-Networks - Antenna Tuner Application
If you look on rigpix and ebay at 90 percent of the hammyhambone tuners made in the 70s or 80s it will be this configuration...
There's a number of ways to do this depending on what you are willing to put up with.
All the vertical elements on one side of the mast will torque the rotor when the wind blows.
Some elements on either side will indroduce the vertical mast's interaction and influence tuning and gain. On...
Make a list of all the channels that don't work or are way off frequency.
You can check using another radio nearby in ssb mode. Zero beat the carrier to check frequency.
Yup. Build a highpass T network. 2 variable caps are needed. SO-239 into one side of one variable cap. Output of cap to the inductor. The other end of the inductor goes to chassis ground. Juncture of first inductor and input cap to one side of output cap. Other side of output cap to output...
That pic is a Comstat 25 which is pretty rare. It had channel 22A AND channel 22B as well as enough crystals to get all the A channels. That was a big deal back then and could get you noticed by Uncle Charlie pretty quickly.
The Comstat 25A is a regular 23 channel job and can be modded for...
I was present at two FCC inspections of ham stations. Both times they had the licensees transmit right over ragchew communications. They said to identify as an FCC test + callsign.
That's true but there are limitations. Old rigs like the Johnson Ranger will tune into just about anything but you can actually load up on the second harmonic if you aren't careful.
Modern linears are usually not designed to work into a VSWR over 2:1.
Solution?
No bux?
Build a tuner...
If all the laws that make freebanding illegal were lifted there would be little or no freebanding as it works now.
The hams would converge on those frequencies and pound the living s#1T out of the freebanders.
The normal way to resize any antenna is find out the freq for best SWR.
Calculate the desired frequency's percentage of the best SWR freq.
Multiply the existing antenna length by the percentage.
I don't know any of the players and sure have seen a lot of B.S. when it comes to gizmos sold to CB types BUT the information about P.E.P. being useless under certain conditions of distortion is right on the money.
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