You're right. It was funny. Right up until the last three words and that killed it dead on the spot. Nuff said. life goes on.
You're right. It was funny. Right up until the last three words and that killed it dead on the spot. Nuff said. life goes on.
If I'm not mistaken, the antennas like the A-99 and my personal favorite of this type antenna, the Tram 1498, both are 1/2 wave over 1/4 wave antennas and that is their counterpoise and therefore the coax never gets involved in the equation.I didn't say that very well, did I? Height above ground/dirt isn't what causes RFI, but how close the RF signal source is to the devices being interfered with certainly does contribute. If that antenna is further away, which can also mean higher, then it's less likely to cause any interference. In the case of the 'A99' and the Imaxx antenna, they both use the feed line/coax as their 'other half', the radials, counterpoise, etc. That means that since that feed line is going to be 'closer' to things than the antenna it's self, it can certainly be a source of the RFI/'bleeding'.
- 'Doc
In theory this is true, but in actual practice the coax does radiate a bit and is also prone to carrying CMC's with these types of antennas.the coax never gets involved in the equation.
Yes, common mode currents. Think of them as radio signal that didn't get transmitted properly due to a bad antenna match or other factors.what are CMC's.
Neither antenna is a collinear...they are not 1/2 over 1/4 waves...simple End-fed Half wavesA-99 and my personal favorite of this type antenna, the Tram 1498, both are 1/2 wave over 1/4 wave antennas