It's likely you won't need any protection from the transmitter (lightning protection may be another story). To verify this you can either use an oscilloscope on the output of the K9AY or just build a
Mikek said: "I'd like to apply the loading to a BOG to slow the VF and make it seems longer. ie. make a 80 meter BOG length work on 160 Meters. But then make the reactance go away for 80 Meters My ac
That's a good thought but the solution isn't obvious and the devil is in the details. Most three terminal regulators can be configured as current sources but I doubt that their output impedance will
You won't have any success trying to rename a BOG. A BOG (Beverage On the Ground) is an accurate and appropriate name. Harold's first "Beverage" was actually a BOG. A short time later it was raised a
In EZNEC the RDF number is the difference between the average gain and the gain at the elevation angle you select. W8JI uses 20 degrees as the reference and some other systems use a slightly differen
W4EF said: Reading that QRZ.com thread you linked to and reflecting on K4SAV's measurements and how much they appeared to vary over a fairly short period of time, got me wondering about what could be
KZ1W said: "If NEC2 is wrong, so is NEC4." - I don't think so since a different ground modeling approach is available in NEC4.2. Running EZNEC Pro4 antennas both in 2 and 4.2 sometimes shows signific
Without more detail of your system, the cause is only a guess. Here are some possibilities. A single wire isn't much of a ground plane. It will make a vertical directional. When you change from a sin
Another thought. Changing to a good ground system with a good choke at the antenna feedpoint will make your vertical omnidirectional, but that may not solve the noise problem,. You may need a directi
Power pole noise can be difficult to find with a portable receiver that is not directional. It's also difficult to find when all you have is an ultrasonic detector because those have to be pointed ri
I just looked thru a bunch of old Topband messages and found 130 messages pertaining to FOR SALE items. Many of those were when the forum was under different management however. Perhaps it is time to
Tree already posted that ads are not allowed on this list. The OP apologized and promised to not do it again. Some lists do allow relevant ads. Etiquette requires us to ask first. /relurk Yes and I e
W3LPL said "A peripherally related issue: Running DC power through the same coax cable as low level RF signals is asking for trouble." I agree completely. Here is my story of trying this. Maybe this
My first contact with ON4UN was in 2006 when I finally moved and got enough space to put up a 160 antenna. I have worked him many times since. His Low Band DXing Books I use as reading material when
Saying 160 propagation is complicated is an understatement. Otherwise someone would have already figured this stuff out. One other contributor that has to be added to the mix is the effect of Earth's
https://web.archive.org/web/20180815141931/http://w0btu.com/160_meters.html After you read W8JI's comments, put these two antennas on EZNEC. It will say the dipole smokes the vertical at all elevatio
I think you would be better off using a different antenna. Gain of that antenna on 17.2 kHz will be much less than -100 dBi. I can't give you an exact number because EZNEC doesn't display numbers les
This link shows a schematic of this thing. (Assuming it's the same as the packaged version.) https://tinyurl.com/3pkvzdft Jerry, K4SAV Search for QRM Eliminator. Cost is around $60. These are useful
You are correct. It is rubbish. I built it and recorded measurements because there was so much hype about it. I got exactly what I expected. A high angle omnidirectional antenna is not a DX recei