Talk:T2FD Antenna

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I can't understand why the claim that the T2FD is relatively immune to local electrical noise is 'disputed'. Any balanced-feed antenna will by definition 'phase-out' local electromagnetic noise - at least from the broadside direction. This antenna works, by the way. The small size (and especially the resistor) make it look like a dummy load on paper, but it isn't, (and I don't know why either! :-). It works even better if you stick a big piece of insulating tape over the 'S' meter and just listen. Chris G4PDJ (Contact via qrz) 08:44, 11 January 2007 (UTC)

"Removed technically naive qualification re. ATU as passband filter"

Hmmm...A bit of a sudden removal, and rather arrogant of course, but I won't bother putting it back in. I still think that (although not essential) the use of an ATU is worthwhile, especially with modern-day solid state rigs. The T2FD is very broadband, but can still present a considerable SWR at certain frequencies (mine ranges between about 2:1 and 3.5:1, which is not 'high', but still enough to cause some PA protection circuits to 'throttle back'). Obviously an ATU is not going to do as good a job of harmonic suppression or recieve preselection as a proper tuneable band-pass filter would, but it's better than nothing, as this antenna will by definition radiate just about anything that comes up the feeder. A fairly cheap and cheerful coaxial ATU will do (maybe even replace the 'Ant' socket with a 75 Ohm connector for that finishing touch). In most cases the SWR should be low enough to fall within the range of an auto-tuner too. (ChrisG4PDJ) 160.84.253.241 (talk) 09:35, 26 November 2007 (UTC)