Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Tue, 24 Dec 2019 18:48:49 +0000
HI, RFS Cablewave Cellflex 7/8", or 1/2" Heliax equivalent (equivalent attenuation and physically) is a much better , lower loss and highly cost effective alternative (LOWER COST) to LMR 600 or 600 U
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Sun, 5 Jan 2020 19:57:32 +0000
Ref. my learned acquaintance, Jim, VE7RF, " see they also make an outdoor version of RW-90, waterproof, UV proof. " For most any outer jacket material, if the rating is 105 Deg. C, it is going to be
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Sun, 18 Oct 2020 01:19:12 +0000
Hi Folks, After reading all the comments I felt a need to comment. The following comments are made based only on what I read in the latest posting. If any of those aspects are incorrect, I would glad
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Fri, 20 Nov 2020 18:19:55 +0000
HI T-talkers, I do not suggest the wrap around the mast method. RG 213 and other similars have small single bend radiuses, close to the OD of most masts. Repeated bend radius's also raise issues. The
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 30 Nov 2020 18:01:38 +0000
Hi Kirk, I could perhaps shed more light on this but I need to know what freqcy are you using to test, and what is your VSWR. Jim mentions 30 MHz, and he is correct as to what the avg. loss ( 1.0 dB
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 7 Dec 2020 18:05:19 +0000
Hi Mike, My firm sells a variety of Dacron (aka Polyester) double braid rope which is resistant to UV, rot, mildew and abrasion. MADE IN USA. Our rope is less expensive than other ham dealers, but is
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Tue, 8 Dec 2020 19:07:10 +0000
Hi T Talkers, STI of California was mentioned below. I used to buy from them but switched to another USA Mfr. who provides stronger rope at lower prices. STI supplies some ham dealers and I supply th
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 21 Dec 2020 18:54:29 +0000
Hi Charlie, I agree completely with Tim's suggestions. And where you mention testing the phasing lines, yes. Be sure to totally disconnect them from the system and test on an appropriate analyzer to
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 15 Feb 2021 21:32:05 +0000
Jim Brown hit it on the head, use AMphenol 83-1SP. That is the only connector we use on assemblies and I just had our assembly dept. make some cables for my personal use, using 83-1SP. The "gold std.
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 15 Feb 2021 21:35:51 +0000
Woops, my last to TT few min. ago I forgot to change the subject but I did delete all the background emails HI Steve K1PEK Jim Brown hit it on the head, use AMphenol 83-1SP. That is the only connecto
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 15 Feb 2021 22:05:17 +0000
For quite a few years we have been doing low loss cable assemblies for various commercial markets, military and government, as well as supplying HRO , and other dealers, with all their LMR cables and
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Thu, 11 Mar 2021 16:27:21 +0000
The use of "Dacron" rope, outside, is important vs. most other types of rope. Double braided Dacron (aka polyester) is the best to use for ham applications, to include heavy hauling applications, due
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Wed, 17 Mar 2021 18:04:49 +0000
Steve. spot on topic, tnx. And judging from the varied comments, it IS of interest. In part, it is also providing us with info ref. the , fairly natural, tangent of some of the commercial ant. co's f
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Tue, 23 Mar 2021 17:00:02 +0000
Hi John, Send me the cable part #, OD size and gender of connectors you need (and Plse confirm N's or whatever) . Send to my business email so we keep it off this site. Also , how many?? I realize yo
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Sat, 10 Apr 2021 20:41:09 +0000
Byron, Copper oxide conducts well, depending on its density. But the rod is buried, limiting exposure to oxygen If in fact the content is minerals asscociated with water, then the minerals should not
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Sun, 2 May 2021 17:52:27 +0000
Fritz, I am not qualified to comment on what may be the issue with your cable, but if you find that you need to replace the cable, I likely will have an excellent price for it. I would need to know t
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 24 May 2021 17:08:14 +0000
Ed, noting Jon Zaimes ref. to his use of 1/2" double braided poyester (AKA Dacron), 7,000 lb mfr test, if you decide to go that route, my other company, DAVIS ROPE and Cable Assembly, not to be confu
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 16 Aug 2021 20:33:51 +0000
burying conduit vs pulling when (STEPHEN L SALA) Steve, What is the make and part # of the cable ? What OD is the cable ? What is the ID of the conduit ? What type of bends (angle) ? Without knowing
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Mon, 30 Aug 2021 16:59:55 +0000
Hi Larry, I am the designer of Bury-Flex Tm some 15 years ago. DAVIS RF holds the Tm . So, one could say I am biased. But as most folks who have dealt with me, or DAVIS RF, know that I provide pertin
Author: Steve Davis | Davis RF <sdavis@davisrf.com>
Date: Sun, 5 Dec 2021 19:28:26 +0000
Hi Don, I completely agree with Jim's observations and suggestions. Also,. back in the day, a "lazy H" antenna was excellent on 80 m. Quite possibly this is a name for what Jim is suggesting, maybe n