There is some purpose-made stuff used for cable TV and the like that actually has silicone lubricant inside. It's a little small for multiple cables, though. You can probably scrounge short lengths (
I bought crimp-type F connectors and inexpensive F to PL-259 adaptors from the RF Connection, Steve -- I'm using quad-shield RG-6 in my new receiving antenna system (in progress) and it is too big in
Perhaps an F-12 person will comment, but I believe they all use the standard wall, which permits telescoping in 1/8 inch increments; I believe they beef up by doubling and tripling the critical secti
I am pretty sure that's right. 73, Pete N4ZR The World HF Contest Station Database was updated August 4. 123 stations were added or updated. Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
It's in this connection that I recall a post by W2VJN some years ago recounting tests of the relays used in their TopTen relay boxes. Despite the fact that these 10A-rated relays are very small, and
Well, you must have known you were going to get some flak on this, Steve. A few years ago I testified in a county Planning Commission hearing on a new tower ordinance (aimed at cell towers), and afte
More times than I care to admit, I've been foxed by the cache of my browser storing an old version of a page. I suspect this may be the case with Mapquest, because I don't recall it ever having an ae
Isn't it likely that an antenna from that era can be usefully improved by computer modeling? 73, Pete N4ZR The World HF Contest Station Database was updated August 4. 123 stations were added or updat
In receiving applications, there is also the sub-set of concerns due to pickup on the shield of the coax destroying the directionality of antennas like pennants, flags, etc. ON4UN has an interesting
A question, though. One of the beefs with Phillystran is that it stretches about twice as much as EHS of the same approximate breaking strength, for a given tension. This implies to me that using big
Jim's right, of course. I was thinking of the guyed tower study on K7NV's Yagistress web page. Kurt used finite element analysis software and a model of Rohn 45, if I remember right, and ran a series
I get both TV and Internet via TV cable. It is the last conductor coming into my house that is not protected by a lightning or surge suppressor, or disconnected when not in use. Can anyone suggest an
Coincidentally, I have recently done some measurements, using an MFJ259B, on a solenoid choke (18 turns (closewound) of RG-8X on a 4 /2 inch piece of PVC pipe, versus 50 Type 77 beads on a length of
Perhaps someone can hook one to an MFJ259B (or better) and give us the numbers. 73, Pete N4ZR The World HF Contest Station Database was updated 17 June 03. Are you current? www.pvrc.org/wcsd/wcsdsear
http://www.pvrc.org/Powerpoint/n4zr_files/frame.htm 73, Pete N4ZR The World HF Contest Station Database was updated 17 June 03. Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
Not sure quite what size of CATV hardline is being discussed here, but for the common .75 inch, a 1/2" water pipe to 1/2" copper tubing adapter works great. The big end self-taps onto the hardline ja
I assume that "insulated" radials will be required. I have an HF-9V vertical mounted above a galvanized roof. I used two 8-foot 1X6s, crossed, with a pipe flange and about 2 feet of pipe - the antenn
I recall -- but can't find at the moment -- a reference to a study done during the last sunspot minimum that found the top contest stations were getting less than 2 percent of their scores in DX cont
A lot of good free stuff here, Jim -- thanks for the lead! 73, Pete N4ZR The World HF Contest Station Database was updated 17 June 03. Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
Tom, I bet RG-142B/U would work -- it is teflon with an outside diameter of .195 and rated at 3.5KW at 50 MHz... The RF Connection has it (www.therfc.com). You might ask them about RG-303 too -- alth