I have the book. It is among the first antenna books I bought in 78 when I was
first starting in this hobby.
The book is The Amateur Radio Vertical Antenna Handbook by Capt. Paul H. Lee,
USN retired N6PL SK.
I built one of the 1/2 over 1/4 wave that you gentlemen are talking about for
20m
I have an antenna that I originally built for 75m. It is 72 feet tall which is
.280 wavelength instead of 1/4 wavelength. This gives a resistive feed point of
52 ohms and an inductive reactance tuned out by a series capacitor.
On 160m I use 34 feet of linear loading and a coil to make up the
I contacted George A. Sanford about the oil used in the variable cap in the
HP4815a and he replied that the oil was used for a shock absorber effect for
frequency stability in the instrument and not for any other reason. I had a
need for a vac variable and have a large air variable that I had
I have a question about using the noise bridge. I have used it cut stubs to 1/4
wavelength using 52 ohm cable with no problems. I now need some stubs using 75
ohm cable which I have on hand.
Will the same procedure work for 75 ohm that works for 52 ohm cable, or will
the different impedance
I just wanted to thank everyone who answered my question about coax impedance
and how it would affect 1/4 wave stub length found and cut using a noise
bridge. It won't. I though that was the way it worked, but I was not sure. I
reasoned this group would have the answer. It did!!
Another
I have noticed a wide range of experience that people are reporting on the life
of the black braided Dacron polyester rope. I have had extremely good life and
strength use on a wide range of antennas and other uses, such as holding a
cover on a 24 ft. diameter above ground pool. The pool was
