How do we over ride the poor reviews from hams who probably have no idea of how to set up a vertical? With only three reviews, the AV-680 suffers because of one bad review for an issue (MFJ/Hy-Gain q
Recent editions of the ARRL Antenna Book contain optimized dimensions for both the 205BA/CA and 204BA as well as the 155BA and 105BA/CA. 73, ... Joe, W4TV Jim is looking for a 20 meter yagi...... Jim
Recent ARRL Antenna Books have contained a series of optimized monoband designs for 40 - 10 meters. Among those is a three element 20 meter design on a 16 foot boom. You may want to get a copy of any
If he is running 200W or less look at the single band filter designs by 5B4AGN - they are modified W3NQN designs and building a single filter without the circuit boards would not be difficult. See: h
Connect a shorted, 1/4 stub across the feedpoint. 73, ... Joe, W4TV Just buy the same ones that mobile antennas have across the feedpoint. Or wind it on a dowel rod . Anyway, you get the idea. Best R
The Butternut coil is used for matching - its impedance is too low to be a useful static choke without effecting the tuning/SWR of the antenna. 73, ... Joe, W4TV On 4/27/2014 11:11 AM, ve4xt@mymts.ne
Unfortunately, it is someone on the list doing the harvesting. The emails containing those "raunchy pictures" always appear in direct response to a new posting/response here. 73, ... Joe, W4TV Nothin
It depends on whether the preamp is generating the intermod or the IC-9100 is generating the intermod. If the intermod is due to mixing in the IC-9100's internal preamp, put the notch filter between
Yes, either Stauff clamps (or the equivalent DX Engineering Resin Support blocks) or boom to element plates cut from inexpensive cutting boards and 2 or 3 U bolts/saddles. Either way one avoids all
Unfortunately many of the component chemicals and processes used 30 years ago are no longer available or are not cost effective thanks to regulations imposed by environmental watchdogs/enviro-nuts (
Why not many serious DX-ers and contesters consider Tri-band or even Five-band quads is a mystery to me. 1) survivability - quads are much more fragile than yagis with regard to icing. 2) survivabili
On 2014-06-22 10:12 PM, Dan Hearn wrote: The coax saw many places on the 3 bands where the feed point impedance was not 52 ohms. That will result in spill over of current from the inside of the shiel
There are commercial antennas which use a quarter wave line with the top near the DE and the bottom connected to the feedline outer shield a quarter wave down the feed line. This should develop a hig
T2FD is essentially the B&W type antenna in a sloping configuration to provide vertically polarized fill in the nulls normally experienced off the ends of a horizontal dipole. The same results can be
It's been 30 years since I had one of those switches. However, it is a stepping relay driving the switch wafer with a second control wafer that opens +12V to the stepping coil when the correct positi
Runs just fine on my Windows 8.1/64 system(s). I don't remember needing to do anything special to make it work although I routinely install amateur related software on a separate drive and therefor n
The rotor series can be identified by the numbers stamped into the base plate. They will typically give series, serial number and month/year of manufacture. 73, ... Joe, W4TV Is there a web site with
If you're willing to do a little fabrication, make your own copy of the Leeson Moxon. Information available a K3LR.com. 73, ... Joe, W4TV Their link: http://www.m2inc.com/index.php?ax=amateur&pg=45 T
The advantage of using insulated elements mounted above/below the boom is that one does not need to correct for the boom. There is no need to adjust the elements for shortening due to passing through
However, if that is the case, a short wire connected from the center of the last director and reflector to the boom will provide the desired connection for top loading on 80/160 without upsetting th