Does this affect the Velocity Factor that you see on the calculators? Dan KJ5IZK
On Wed, Aug 13, 2025 at 6:42 PM Jay Davidson via BVARC <[email protected]> wrote: > From an engineering perspective my first guess would be “skin effect” and > some phase shift. By bending it you’re causing irregularities and > introducing resistance. > > Conductors all have different skin depths and it changes with frequency > and how the eddy currents affect the cross section. Basically as frequency > goes up the depth gets shallower. > > 73, > Jay > > Sent from my iPhone > > On Aug 13, 2025, at 4:54 PM, Richard Bonica via BVARC <[email protected]> > wrote: > > > To All, > I am working on a Dual Band J Pole. What I am wondering is the following... > > if I use 90degree copper connectors and pipe, I get a nice clear signal > and an SWR of like 1.4 > If I use a pipe bender, that all goes out the window. The SWR stays the > basic 1.2 - 1.5 but the actual audio has a weird pop and the signal loses a > lot of strength. > > Anyone have a clue why the nice neat bends make the signal sound like > garbage? Do I need to really use the ugly joints? > > -- > Richard Bonica > C: 281.935.7222 > Email: [email protected] > Freq: 147.000 - DMR - Digital Mobile > Territory: NE Fort Bend > CERT, CST, EST, WEB EOC, HSEEP, FEMA PD, Wilderness First Aid, CPR, Extra > Ameture Radio > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ >
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