IIRC, I read somewhere that a buried radial no longer adds effectiveness to a system with increased length when its input impedance (which varies with length) approaches its characteristic impedance
http://www.lmgtfy.com/?q=Antennas+by+N6LF. JimCoild you post a link to the web site please ThxChuck Gooden n9qbt Sent from my Verizon Wireless 4G LTE smartphone I consider Rudy Severns' work on radia
The current divides over the radial field. QRO with one buried #22 radial is probably not a great idea. With a reasonable number it doesn't matter. Physical durability is a greater concern. #22 may n
I love doing this. http://www.lmgtfy.com/?q=luso+towers Al AB2ZY ________________________________________ Sent: Tuesday, January 3, 2017 9:16 AM To: towertalk@contesting.com Subject: Re: [TowerTalk]
Consistency - "control" in process terms - is next to godliness in product quality. The idea with ISO is that you can't be consistent (including consistently making crap) if you don't have your proce
If you are growing something indoors that's illegal, it is fair to assume that it is in a place where there is no exposure natural light and prying eyes. In which case you would need 12 hours of arti
It depends on where you are. The north magnetic pole has been moving at the rate of 30-35 miles per year, from northern Canada towards Russia. It was within the Canadian Artic at the turn of the cent
Shortest. Al AB2ZY ________________________________________ From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Patrick Greenlee <patrick_g@windstream.net> Sent: Wednesday, January 25, 20
There is no tension on a pier pin, only shear, and hopefully not much if the tower is plumb and the guy tensions are equal. The only purpose of an adhesive in this application is to keep someone from
http://www.lmgtfy.com/?q=grc+vs+imc about GRC vs. IMC for mounting pipes. Please elucidate what GRC and IMC are. I was unable to google either of them and get the answer. See my original question. Mi
I think he just wants to use the highly convenient functionality that is built in. On many radios (e.g. Icom), the interface cable disables the tuner in the rig. Pushing the tune button on the rig ca
Hopefully this photo is visible to all. https://groups.yahoo.com/neo/groups/Butternut-antennas/photos/photostream/lightbox/1962292038?orderBy=mtime&sortOrder=desc&photoFilter=ALL#zax/1962292038 This
This is a technique commonly used on the main cables of suspension bridges as well. Al AB2ZY A common, easily applied, and often quite effective effective solution to vortex shedding that is causing
https://en.wikipedia.org/wiki/Ball_bearing#Direction_of_load I need an education on bearings. The question is the axial or thrust rating of guesstimate thereof on bearings that do not show that spec.
Structural bolts are hardened by heat treating. Hardened bolts can crack or break if you try to bend them. You can avoid that possibility by heating, but then that will undo the heat treatment and we
Please explain why the J bolt fabricator can bend the end of the J bolts into the shape of a "J", but OTOH, the installer cannot put a very slight bend into them. Because they are forged, threaded an
This "drain hole" thing is always so laughable. It is a unique idea to the ham community. Holes let water in as well as out and there is no reason to worry about water ingress if ordinary care in tak
I have one of these http://www.acmetools.com/shop/tools/greenlee-6500-foot-poly-pull-line-430?cm_mmc=Bing-_-PRODUCTFEED-_-GREENLEE-_-430G1&CAWELAID=600009240000044735&CATARGETID=600009240005406776&CA
It wasn't clear why you were concerned. Soft starts are common in industrial applications, though I can't recall ever seeing one used where the output of the reduction drive was 1 RPM! That motor spe
If that's your concern, maybe some kind of overrunning clutch arrangement is possibly a solution? Yes, I know the application is bidirectional.... An electronic solution to the problem is likely to b