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Tom,
It should be obvious when somebody asks how to find VF by using an HF antenna analiser he is interested, like every other radio amateur, in the HF value of VF. If you agree with the table in the other posting, which gives VF vesus frequency, and you are aware VF decreases with frequency, then how come you didn't realise you had taken the value of 0.665 out of its HF context. All my figures are correct. ---- Reg '''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''' ''''''''''''''' "Tom Bruhns" wrote in message m... "Reg Edwards" wrote in message ... "Tom Bruhns" wrote "Reg Edwards" The velocity factor of ALL solid polyethylene coax cable, regardless of impedance, is 0.665 ================================ And this comes from someone who I could swear posted not long ago a table that had velocity factors for solid polyethylene cable that were significantly different from this magic number? ... Freq Ro jXo Angle VF ------ ------ ------ ------ ------ 50 Hz 967 -965 -44.95 0.034 1 kHz 220 -213 -44 0.151 10 kHz 80 -58 -36 0.41 100 kHz 56 -9.3 -9.5 0.59 1 MHz 52.4 -2.4 -2.7 0.63 10 MHz 50.7 -0.76 -0.86 0.65 100 MHz 50.2 -0.23 -0.27 0.66 Smith Chart calculations begin to be inaccurate around 2 MHz and below. So do SWR meters. |
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