Just to clarify and properly cite - the .PDF file I linked was found online at a DXE server, but was actually published by Cushcraft/Hy-Gain (MFJ) and written by AA5MT.
BTW, Mark, while installing/tuning your Butternut, you might be interested in this about antioxidants: I'm getting ready to install an R9 and called Cushcraft to ask about their recommendations regarding the use of antioxidants during assembly/tuning. (I specifically asked about Penetrox A or Noalox.) Of course, knowledgeable hams have been applying antioxidants to antenna connections for years, but I was specifically interested in their take regarding effects on conductivity. The rep said the antenna should work fine without such antioxidants but slip-joint conductivity might sometimes actually improve with the use of an antioxidant. He also suggested such antioxidants are a good idea near salt water (including the Houston area). A DXE rep told me they recommend and swear by Jet Lube SS-30 (a copper infused grease without graphite) as a superior antioxidant to Penetrox A or Noalox because these last 2 eventually dry-out. This got me thinking about the possibility of galvanic corrosion. I keep in the shop a tub of Loctite C5-A, a very good quality competitor of Jet Lube SS-30, which, while working in the power plant, I learned to smear on everything needing an application of anti-seize. This seemed like an opportunity to save some money! Now, the Jet Lube Technical Data Sheet (TDS) says that SS-30 is "Not intended for use with aluminum where galvanic corrosion could be a significant issue." And, the Loctite C5-A TDS does not mention aluminum either way. The difference between C5-A and SS-30 is that C5-A contains graphite in addition to copper. Some would point out that graphite attracts moisture, possibly creating an electrolyte leading to galvanic corrosion. On the other hand, some would point out galvanic corrosion is nearly impossible within a grease barrier. So, I had almost decided to use C5-A on my R9 until I remembered the incredible mess it makes - no matter how many rags I use and how careful I am, it gets on EVERYTHING (and all over me). I bought the Penetrox! (I'm not worried about it eventually drying out because I don't think that will affect conductivity or disassembly.) Gus K5GMB On Wed, Aug 25, 2021 at 7:55 PM Gus Bernard <[email protected]> wrote: > See this from DXE. It's general advice, but uses the Cushcraft R9 as an > example: > csh-r9_sn.pdf > <https://static.dxengineering.com/global/images/technicalarticles/csh-r9_sn.pdf> > > Gus K5GMB > > On Wed, Aug 25, 2021 at 10:45 AM Rick Wannall via BVARC <[email protected]> > wrote: > >> That’s a great resource, dcasler.com. I just took a quick tour and want >> to thank you for bringing it to our attention. >> >> >> >> RW >> >> KG5ITh >> >> >> >> *From:* BVARC <[email protected]> *On Behalf Of *JP Pritchard via >> BVARC >> *Sent:* Wednesday, August 25, 2021 10:12 >> *To:* BRAZOS VALLEY AMATEUR RADIO CLUB <[email protected]> >> *Cc:* JP Pritchard <[email protected]>; Mark Ram <[email protected]> >> *Subject:* Re: [BVARC] New HAM needs assistance tuning a Butternut HV9V >> Antenna >> >> >> >> Mark, it's just come to my attention that Dave Cassler, the new ARRL guru >> has that very antenna in his back yard. It appears to be a fairly complex >> antenna >> >> At any rate He takes questions and offers up practical answers for all >> kinds of ham issues. >> >> >> >> https://dcasler.com/ask-dave/ >> >> >> >> I hope he can help you. >> >> >> >> 73, JP, K5JPP >> >> On 08/24/2021 4:48 AM Mark Ram via BVARC <[email protected]> wrote: >> >> >> >> >> >> Is anyone using a Butternut HV9V antenna, preferably ground mounted with >> a radial plate ? >> >> I have installed the antenna and would appreciate guidance on tuning it. >> >> >> >> 73, >> >> Mark >> >> N8YOG >> >> ________________________________________________ >> 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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