I used the Dunestar Triplexer for a while, and it worked great, not a trace of interference between bands at the 100 watt power level. Now I have the 4O3A Triplexer System, and it works fine at 1500
My curiosity got the better of me, so I looked back in the Towertalk archives to try to find out what this is all about. The only thing I could find was one post where Steve complained about the huge
I've had good luck with these: http://www.mgs4u.com/PL-259-connectors.htm The little video is neat: https://youtu.be/6Nz2qRrQdUA Flat-rate-box shipping is $6, so order enough to amortize the shipping
Speaking of "tuning" a choke, couldn't you just run 50 watts into a dummy load, and tee off a choke and a 100 ohm resistor to ground, and calculate the impedance of the choke by measuring the RF volt
I have the same setup to switch my half sloper between 80 and 160. I use a Jennings RF3A Vacuum Relay that a friend gave me. I get the 26 VDC for the coil from one of those little Radio Shack 12V 2.5
This is Fair-Rite part number 2643803802. I checked my usual source, Arrow Electronics, and they are $3.84, with over 1600 in stock. In checking out Arrow, I made this discovery: For a limited time,
I haven't seen any response to this inquiry, so I decided to post the measurements just now taken on my 40 year old 40-2CD, with 80' of RG-213, and a K6NA balun. The antenna is constructed to the ave
For tough insulating material, this stuff is good: http://lists.contesting.com/archives//html/Towertalk/2006-09/msg00158.html Attached is a picture of what it looks like on one of my antennas. Maybe
I've had the 4O3A ones for a few years. They work great, with no issues. I have used it in Multi-2 with two 1500 watt transmitters running at once. (My KT-34XA and RG-213 had no trouble with that eit
I don't know anything about Yaesu rotators, but if this were a CDE unit I would recommend replacing the AC motor capacitor as a first step. The caps are cheap, and if they deteriorate, rotator torque
I just installed the very same system at W7WW's last Friday. He also got the 100 cfm fan on the 10 Meter BPF because his antenna has a 2:1 SWR at 28.0, and he is a RTTY guy. He also has the system in
I have seen an increasing number of posts such as the one below, where the text is all compressed into one hard-to-read paragraph. Anyone know what's going on? Maybe it's something on my end? I don't
Maximum force in the rope is 743 pounds. This is a "sum of the moments" problem. The tower won't start to move until the rotating force in foot-pounds about the hinge in the upward direction exceeds
10' out on the tower to a pulley 20' up would be awkward as the tower approaches vertical, because you would have almost zero leverage. Now, if you were to attach the rope to the tower 20 feet from t
Now multiple steppir antennas would work. Terry KI7M -- For many years, W7WW ran a tribander and a 2 el 40, with a Steppir Dipole between the two for SO2R. That setup worked great! A nice straight d
Do NOT send your rotor to RK Radio Electronics, owned by Richard Kitchens, KD4NMI, in Knightdale, NC. I sent a Tailtwister there about 18 months ago, and I will probably never see it again. Dave Hach
Actually, the amp could have a parasitic even with a dummy load, but it wouldn't show up as SWR, because the dummy load would be 50 ohms at the parasitic frequency. Dave Hachadorian, K6LL Yuma, AZ Ou
Let's discuss these shunt chokes a bit. I am feeding my tower on 80 and 160 with a half-sloper fed near the top of the tower. The sloper length is changed with a vacuum relay to cover both bands. SWR
On the control unit, jumper terminals 5-8 to bypass the limit switch. Dave Hachadorian, K6LL Yuma, AZ It sounds like the CW limit switch is stuck open. You can wire around the limit switch at the con
I bought a 10-footer once from Texas Towers. They cut 1 foot off to make it UPS shippable. That was a long time ago though. Dave Hachadorian, K6LL Yuma, AZ Hi All - Could someone point me to a source