You should be able to get your length of standard wall PTFE tubing from Asian markets easily without the overhead of US international postage. A millimeter equivalent diameter that is not smaller tha
Short version: There is always an urge to see how little we can get away with. It's an experimenter's itch. I understand it well. It's an Olympic sport around here in the crowd I run with. But we do
What I like about some of the #31 stuff is that I can get those large clamp-ons, wind a particular kind of conductor through it, and then put it up on my analyzer and "tune" that nice resistance hump
We need to put gorilla detectors in SWR meters. Loss in the ground counterpole will be the thousand pound gorilla in the room. Heavily bent antennas as you describe lower the radiation resistance sig
The change in an overheating core has a swing to it and you can watch the SWR change, in a continuous fashion, while you are transmitting, while arcs exhibit sudden change. What you call "imbalance"
After watching these kind of results for months and months until I was bleeding from the eyeballs, I came to some conclusions. 1) There are calm steady propagation nights, and there are wildly varyin
You may want to take this onto the Elecraft reflector, but I would definitely check all the K3 sub RX mini coax connections and make sure they are seated properly and firmly. All you need is for one
Oh, sounds like you are on the cleanup trail. Chasing out the noise is often the major eye-opening event for state of the station. Trust nothing, investigate everything. Measure, measure, measure. Si
Short version: Believe what you measured. Long version: We did measurements of this for understanding and designing BOGs some years back. In the upper east central part of North Carolina (contains Ra
I'm with Tom on this one. This is not a noise suppression problem The placement up high on the tower means that the common mode path is nearer a voltage node than a current node and we are talking ab
Alas, will I never see the likes of 1957-58 ever again for working EU on 6M using an "end-fed" window screen for an antenna? On the other hand, now that I have a couple really good trees to support 1
That sounds more like relays are not being gotten voltage out at the PVS switch unit. 1,2,3,G all have to be separate wires to the controller. Particularly suspicious like G may be mixed up with one
With the following caveat: The very sparse and short buried radial systems he is showing are FAR more lossy in practice than shown in his gain tables. Four twenty foot buried radials beneath a 1/4 wa
Not all loss is visible as series resistance in the counterpoise system, which is the tack you are taking. Note that a dummy load is 50 ohms, and does not radiate worth a hoot. It takes modeling to i
[I may have sent an incomplete version of something on this topic. Apologies] 6 dB would be someone's calculation based on currents. The sometimes abysmal performance of a ground rod based vertical s
Interspersed. Yes, indeed. But where do those ground losses ACTUALLY start? Why is it that what you call "far far" ground losses can vary by raising very low feed points small amounts above ground th
I have already spoken extensively that your assertion is not proved, NOR is the counter-assertion proved. I have no intentions of adding to that. I am not persuaded either way, though BOTH sides of t
Short version: ** WARNING: Most locations do not have the fortunate circumstances to support sparse or miscellaneous radial systems without exaggerated loss, and the builder with constrained circumst
"Who has done that, with only a radial change, against an unchanged reference antenna that is in the far field of the antenna under test. [Where's the post with the details] ?" Perfectly logical ques
Completely agree with Tom. Tom didn't elaborate on just how BAD that loss can be. Think of your L and your tower as being two windings on the same transformer. If the base of your tower is just in th