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On Sat, 30 Jul 2005 19:29:39 GMT, Me wrote:
/// Also consider that at VHF an antenna can operate over a very wide Frequency Range (155-159 Mhz) without any major RF Impedance changes. This is NOT even close to being true at MF/HF frequencies. Move your frequency 250Khz and your antenna tuning is totally blown away. /// Me been there, done that......for a long long time..... Oh my, anonymous poster, you compare a frequency deviation of 2.5% at VHF (135 - 139 MHz) with a frequency change of 250kHz at (say) 3 MHz But wait: that's a 8.3% change. And you say that the effect of a 250kHz difference at HF is much greater than 4 MHz at VHF? Well yes! 8.3% is much greater than 2.5% How long did you say you have been doing this sort of thing? :-) Brian W |
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