Ha.... You know it Mike. Far away in Space and Time. QSY to my personal email and let's chat. ROD / W5IE
Rod Neumann (832)444-0192 ALLogic Inc. / AdorStore PO Box 217 NEW ULM, TX 78950 On Sun, Feb 25, 2024 at 7:53 AM mike.williams shopjubilee.com via BVARC < bvarc@bvarc.org> wrote: > Rod, > > > > Did you previously work at Syntron in a place far far away? > > > > Mike Williams KK5SC > > > > *From:* BVARC <bvarc-boun...@bvarc.org> *On Behalf Of *Rod Neumann via > BVARC > *Sent:* Saturday, February 24, 2024 9:59 PM > *To:* BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc@bvarc.org> > *Cc:* Rod Neumann <i...@adorstore.com>; John Holmes <k4...@hotmail.com>; > Robert Polinski <emdhous...@suddenlinkmail.com> > *Subject:* Re: [BVARC] Antenna prewire house > > > > It would seem to me the fast rise time of the lightning pulse makes it > similar to any RF good practice concerns....the safety ground path should > have low inductive reactance, not just low resistance. It also seems to > me that skin effect resistance of braided strap may be lower than the skin > effect resistance of stranded large gauge wire because of the increased > copper surface area of braid (keeping other things the same). But all the > weaving of the tiny braided little strands may present an increase of the > inductive effect, unless the strands are not tarnished and act like a solid > band -- so that may be why, these days, you see a preference for copper > straps that are not braided. So I am not necessarily pushing a conclusion > on what is best, but rather "thinking out loud" on why some choices may be > better than others. > > > > ROD / W5IE > > > > > > > Rod Neumann (832)444-0192 > ALLogic Inc. / AdorStore > > PO Box 217 > > NEW ULM, TX 78950 > > > > > > > > On Sat, Feb 24, 2024 at 12:47 PM John Holmes via BVARC <bvarc@bvarc.org> > wrote: > > Totally agree and it’s vital to measure the grounding resistance, both my > positions (station and electrical service are linked but 300ft apart) are > sub 1 ohm which is well below code. All my bonding inside in the shack > leads to a common grounding copper bus bar with braided copper cables to > each bit of equipment. You can only do so much but every little helps. > > > > 73 John W Holmes K4VMG > > > ------------------------------ > > *From:* BVARC <bvarc-boun...@bvarc.org> on behalf of Robert Polinski via > BVARC <bvarc@bvarc.org> > *Sent:* Saturday, February 24, 2024 12:37:36 PM > *To:* 'BRAZOS VALLEY AMATEUR RADIO CLUB' <bvarc@bvarc.org> > *Cc:* Robert Polinski <emdhous...@suddenlinkmail.com> > *Subject:* Re: [BVARC] Antenna prewire house > > > > The type of wire is not important in bonding applications. The object of > bonding is to prevent potential voltages from 2 different grounds. In the > event of a lightning strike, you want all grounding systems to be at the > same potential. This relates to safety & equipment protection, not RF > grounding. Example, if your electrical service ground has a resistance of 3 > ohms (NEC requires it to be 4 ohms or less) and your ham station ground is > 1 ohm, if lightning strikes the power lines on the next block, the surge > coming in the power line to your home will be seeking your ground rod at > your home. This surge will not be the full current of the strike, as ohms > law is in effect, resistance of the ckt limits the current. If the strike > sees your house ground at 3 ohms, but the ham ground is 1 ohm, It will take > whatever path it needs to that lower resistance ground, that means thru > your radio or any other equipment that has both a electrical ground (3 wire > cord) & a ham station ground (antenna system) The bonding between these 2 > grounds makes the surge see the low resistance of the combined grounds and > greatly lowers the chance it will take a path thru your equipment. Robert > > > > *From:* BVARC <bvarc-boun...@bvarc.org> *On Behalf Of *John Holmes via > BVARC > *Sent:* Saturday, February 24, 2024 11:06 AM > *To:* BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc@bvarc.org> > *Cc:* John Holmes <k4...@hotmail.com>; Rick Hiller <rickhille...@gmail.com > > > *Subject:* Re: [BVARC] Antenna prewire house > > > > Use braided copper for *bonding* but minimum AWG6 wire for external > grounding and lightning protection. > > Every single *ground* system in the N0AX book suggests wire not braid. > > > > The two are totally different animals > > > > > > *From: *BVARC <bvarc-boun...@bvarc.org> on behalf of Rick Hiller via > BVARC <bvarc@bvarc.org> > *Date: *Saturday, February 24, 2024 at 10:50 > *To: *BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc@bvarc.org> > *Cc: *Rick Hiller <rickhille...@gmail.com> > *Subject: *Re: [BVARC] Antenna prewire house > > John is correct....... > > Have a read of ARRL Publication by *H. Ward Silver, N0AX, Grounding > and Bonding for the Radio Amateur * > > *and * > > *The Radio Hotel in the BVARC Beacon Sept 2023 Conductors for Grounding > *written > by the folks at Georgia Copper. > > find it on the BVARC.org Tech Pages at > > https://bvarc.org/rh/rh_2309.pdf > > > > 73...Rick W5RH > > > > > > > > > > On Fri, Feb 23, 2024 at 8:59 PM John Parmalee via BVARC <bvarc@bvarc.org> > wrote: > > I think copper strap is better. Look at any broadcast facility where > there is high power and you will find copper strap.. Check out George > Copper > > > > *From:* BVARC <bvarc-boun...@bvarc.org> *On Behalf Of *Robert Polinski > via BVARC > *Sent:* Friday, February 23, 2024 12:31 PM > *To:* 'BRAZOS VALLEY AMATEUR RADIO CLUB' <bvarc@bvarc.org> > *Cc:* Robert Polinski <emdhous...@suddenlinkmail.com> > *Subject:* Re: [BVARC] Antenna prewire house > > > > Make sure that ether you or your electrician, run a #6 wire from the > electrical ground to any ground rods you install at your ham system. They > need to be bonded together. Robert > > > > *From:* BVARC <bvarc-boun...@bvarc.org> *On Behalf Of *Rod Neumann via > BVARC > *Sent:* Thursday, February 22, 2024 12:37 PM > *To:* BRAZOS VALLEY AMATEUR RADIO CLUB <bvarc@bvarc.org> > *Cc:* Rod Neumann <i...@adorstore.com> > *Subject:* Re: [BVARC] Antenna prewire house > > > > I'm not answering what you asked, but for a new 2nd story install I will > suggest you put a good deep copper ground rod in the ground directly below > the shack window and run a good copper conductor, I think wide flat > copper braided is best (? is that still the consensus?), and ground all > chassis to that ground. Being up on the second story can present > RF-in-the-shack problems if you don't have a very good low inductance path > to ground. > > ROD / W5IE > > > Rod Neumann (832)444-0192 > ALLogic Inc. / AdorStore > > PO Box 217 > > NEW ULM, TX 78950 > > > > > > > > On Thu, Feb 22, 2024 at 10:05 AM Chuck via BVARC <bvarc@bvarc.org> wrote: > > Building new house 2 story with radio room upstairs was thinking of > bringing cables in under the eve near the peek was looking for any advice > and what type of device with the connectors to buy…..new to ham radio so > not much experience any help appreciated . > > > > Chuck Hale > > KF5UXP > > > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/ > > > > > -- > > Rick Hiller > > *e-mail: rickhille...@gmail.com <rickhille...@gmail.com>* > > *Cell/VM/Text: 832-474-3713* > > *Physical: 9031 Troulon Drive* > > * Houston, TX 77036* > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/ >
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