This antenna started out as an Archer 21-902 'Super Maxim' (Radio Shack) half wave antenna made by HyGain. Found it at a garage sale and bought it for $20; it didn't work when I tested it out.
http://www.cbtricks.com/ant_manuals/archer/21_901/ad/index.htm
I found the assembly instructions for the CLR-2 on a thread here on the forum that was posted by unit_399 a few days ago. Looked to be similar to the Super Maxim. Hmmm....
http://www.worldwidedx.com/threads/hy-gain-clr-2.23496/
Someone had given me a bunch of scrap aluminum tubes they were going to throw out awhile back. Three long pieces were long enough to be 1/4 wave radials. Hmmmm. So armed with the spec sheet on the CLR-2 antenna and scrap aluminum, I could then turn it into a 5/8 wave antenna; so I thought.
I removed the upper/top tube and replaced it with a 9 ft long 7/16" OD tube. Slid it into the tube after opening up the end enough for it to fit and then measured the overall length to 19 ft 10in and then cinched it down with a sheet metal screw and a hose clamp. Added a threaded insert that I got from Home Depot at the top end of the tube, which had a 1/4-20 inside thread. Then I cut three pieces of aluminum tubes from scrap TV antenna, drilled a hole in the end of each one, installed them at the top of the antenna with a bolt, and finally cut them to a finished length of 8 1/2 inches long. It now had a capacitive hat built to spec.
This antenna didn't have the flat disc circuit board like the CLR-2, it has a coil on a form with the tuning tap.
Didn't work at first. Analyzer readings were waaay off. Since I knew that the rest of the dimensions/specs I did to it were right, I reasoned that it had to be the tuning of the coil inside. Turned out that the tap wire on the coil was soldered to the SO-239 connectors center.
It then struck me -
that isn't right.
Just the way that I got the antenna when I bought it at a garage sale
. So I reversed the two bottom wires (tap wire of coil to ground/shield), fired up the analyzer, and found it was spot-on. Mission accomplished.