A Full Wavelength Loop DOES exhibit some gain over a dipole, varying from 0 to 2.7 dB, depending on the height / width ratio as documented in chapter 4 of The W2PV Yagi Antenna Book. For a Square Loo
HUH? The stacking gain for two *straight* half wave elements spaced 1/4 WL (the spacing of a square loop) is 1.0 dB as shown in the ARRL Antenna Book. Turn the ends towards each other and the gain dr
N4KG responses inserted below. Remember, the Matching System must be capable of accepting LOTS of power (often >> 10 KW) N4KG FIXED Direction Loop Antennas are fairly simple to implement and not too
Generally speaking, it is NOT a good idea to drill holes in a (strong) mast. This tends to increase the stress lines around the hole. Pinning a mast to the rotor only transfers the most likely failur
Bob Tail Curtains are vertically polarized arrays, open on the bottom, and used primarily on the Lower Frequencies. For the Higher Frequencies I would guess they went to a Sterba Curtain or other Hor
MY CD44 / TR44 rotors usually came to rest up against the STOP. If I remember right, one internal lever was bent on one such rotor. Tom N4KG __________________________________________________________
I didn't think the CD45 had a brake. You may want to clean the indicator pot and wiper arm. Also increase the tension of the copper strap that engages the top of the rotor and make SURE it is properl
I admit TowerLube sounds like a good idea. OTOH, I've used Lithium Grease from the Auto Department at K-Mart for all of my tower joints and used 3 different towers as shunt fed verticals or elevated
For starters you need to get a copy of the Rohn Catalog (K7LXC sells them for $5? though his Champion Radio Products company and he also has a web site with pictures). Then check the Texas Tower web
For starters you need to get a copy of the Rohn Catalog (K7LXC sells them for $5? though his Champion Radio Products company and he also has a web site with pictures). Then check the Texas Tower web
I admit TowerLube sounds like a good idea. OTOH, I've used Lithium Grease from the Auto Department at K-Mart for all of my tower joints and used 3 different towers as shunt fed verticals or elevated
I didn't think the CD45 had a brake. You may want to clean the indicator pot and wiper arm. Also increase the tension of the copper strap that engages the top of the rotor and make SURE it is properl
How much sunlight can reach a piece of rubber that is " sandwiched between the rotator clamps and the mast" ? Tom N4KG sunlight... ________________________________________________________________ Sig
Another alternative might be to simply model the 3 legs (1.25 inch diameter) at the appropriate positions and connected at the top and bottom. I believe someone reported that a single cylinder of 8?
The only TRAPS in an X9 are in the DIRECTORS. The DE is composed of a 4 element LOG CELL. I've seen some comments about placement of the feedline choke (and the feedline itself) when using LOG Period
A 1.5 volt battery may not be enough to breakdown any contact 'resistance' in the tower joints. I'll bet a KW of RF (or even 100W) does a lot better :-) Someone suggested using a CURRENT SOURCE set t
N4KG comments inserted below. What KIND of Noise? What was the source? I accept your observation. It is ALSO entirely possible that if you had a YAGI on that 70 ft tower that the noise may have disap
I've heard that some AM BC stations (spot?) welded the sections together. Another solution I've seen (supposedly for lightning protection) was to run a large copper wire down one leg with brass groun
I've heard that some AM BC stations (spot?) welded the sections together. Another solution I've seen (supposedly for lightning protection) was to run a large copper wire down one leg with brass groun
MY monoband Yagi's have grounded DE's, and are matched with Gamma Matches (CC & HomeBrew) or T-Mathces (Telrex) or Beta Matches (HyGain, same for HG Tribanders). Tom N4KG ____________________________