The weather is good. Here is another video showing how I use the antenna analyzer to take measurements of the Beverage antenna in the field: https://youtu.be/yiFW_u1CPrs <https://youtu.be/yiFW_u1CPrs
Here is a video of some of the methods I use for problem detection on my Beverage rx system: https://youtu.be/PA67Tz-1TO4 <https://youtu.be/PA67Tz-1TO4> At VE6WZ I have 12 Beverage wires (8 direction
Hi Roger Your tower is too short for a shunt-feed. It needs to be inductive at the QRG of interest, 90 degrees or more (1/4 WL). Your 325 tower is only 57 degrees long on the 630m band. (.15 WL) To s
Scott I am guessing you have some Yagis on top of that tower. Like you there are many towers shorter than 1/4 WL long (including mine!) that are shunt-fed. Its the electrical length that matters. Top
Hi Wes, To be clear, I am referring only to matching a shunt-fed tower using either the traditional Gamma match (a single series capacitor) or the Omega match. If you currently have a shunt-fed tower
Joe.yes, I agree. The tap-point itself is not 50 Ohms, but is transformed to 50 Ohms at the end of the shunt wire. After the inductive reactance is canceled out by the series capacitor, the system is
After 2.5 years of flawless operation, earlier this summer my YCCC 9 circle rx array started to develop some strange inter-mod noise, and random junk showed up on 160m when using the array. I isolate
Today I uploaded a YouTube video showing my YCCC 9 circle HI-Z preamp redesign that uses a relay to ground the vertical during transmit, or when not in use. https://youtu.be/dl-crM5Kb6A <https://yout
Yesterday I decided to measure the actual voltage at base of my short HI-Z verticals while I transmitted on the TX array. Since I first posted about the coupling capacitor failures in these units, I
I found this which might help: http://www.arrl.org/files/file/QEX_Next_Issue/2016/July-August/Hinkle.pdf 73, de Steve Ve6Wz Sent from my iPad _______________________________________________ _________
Over the years I have noticed my Beverage feed impedance will change during the winter. My station is configured to take analyzer sweeps in the shack of any of my 12 Beverage wires. All 12 wires show
A few days ago I posted a video explaining some experiments I did adding short radials to my feed and termination grounds on the Beverage. During that week temperatures went as low as -41 C at the st
Hi Mike I have not considered the temperature coefficient of the core. That is a great suggestion. I did find some generic plots of permeability vs temperature and there can be a big change. The data
Thanks Jim! I didn't look at the Fair Rite catalog, but yesits there on page 8. I am using 73 material Binocular cores. The temp. coefficient for 73 material is .65 % per deg C. My temp change is abo
The recent experiments with my Beverages in the cold weather has raised some comments about the termination resistor and the antenna performance. I received a few emails asking about F/B. I made the
Just like some guys enjoy woodworking and making furniture that they may not really need, I like to build radio things just for the fun of the project even though I may not really need it. For three
Just like some guys enjoy woodworking and making furniture that they may not really need, I like to build radio things just for the fun of the project even though I may not really need it. For three
Tom, Yes. there is a MUCH simpler way to do this without climbing the tower. I have tuned a number of hombrew Yagis and vertical parasitic arrays, and used to think I needed to isolate the driver, th
Rick, We are talking about sweeping the feedline and looking at the REAL R sweep vs frequency.NOT impedance Z=R+jX. We are looking for relative dip in R, not absolute values. We are looking to see at
How important is it to get that Beverage termination resistor just right? Using 4nec2 I do some modelling to show that the RDF and far field pattern of a Beverage is not greatly effected by the termi