Another factor in my case is that the outside NEMA box that terminates the conduit at the house is at the unheated attached garage. The coax/cables leave the rear of the box in an 8" diameter duct th
And the Tennadyne stands up to ice and wind well. I've had over an inch of ice on mine - looked like a sick buzzard - along with 60 mph wind gusts. As soon as the ice melted the elements straightened
.0625" (1/16") error in a 17.78" average element length is a 0.45% error. WOW! Perry K4PWO --Original Message-- From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Lizeth Norman Se
Conventional power cost estimates do not include hidden costs that will be paid down the road. Some of these are reclamation and clean-up of hazardous waste such as coal ash, mining reclamation, nucl
Another good solution for a wireless Ethernet connection is the TP-Link CPE510 (5 Ghz) or CPE210 (2.5 GHz) with the AREDN (http://www.aredn.org/) Beta software. The software allows you to move the op
Another possible source is an awning or shade sail maker as they often use aluminum framework make from tubular stock. Perry K4PWO --Original Message-- From: TowerTalk [mailto:towertalk-bounces@conte
Another source of xformer oil is mineral oil from a farm supply house. It runs a few dollars a quart and is pure VET grade oil normally used to dose farm animals. It's much cheaper than the USP drug
That brings up another thought... how would ethaline glycol (anti-freeze) work as dummy load coolant? Perry Distilled water and deionized water have an affinity for metallic ions. IOW, it's corrosive
If it's thick wall stuff, large diameters are too stiff to roll. They usually ship it in 4' lengths and that won't fit in a flat rate box. Perry K4PWO Wonder why they not offer to use the fix rate en
I have two runs of 3", one of 2.5", and one of 1.25" all near 100' long. Both ends terminate in NEMA 4 rated boxes. All coax exits at the tower via bulkhead lightning arrestors and signal cable exit
Copper direct to a galvanized surface isn't best practice... you need an "isolation" metal like bronze or stainless steel between them. Cadweld serves that purpose and gives you a mechanically solid
I have used LRM400 equivalent from Shireen and from L-com. The only tests I made were using an MFJ antenna analyzer to calculate the loss. Both vendors cable met the published specs of LMR400 within
http://www.l-com.com/coaxial-7-16-din-male-crimp-connector-for-600-series-ca ble I haven't used these but they look OK. I have used a lot of the crimp "N" and they are great. Perry K4PWO I am looking
Many of them have TX trailer plates... It's the $3000 deposit to bid that has me concerned! Sounds like they expect them to go well above that. Perry K4PWO --Original Message-- From: TowerTalk [mailt
That's because the NG doesn't know how to use them. With frequency agile ALE they are very important. Perry K4PWO Sent from my Sprint Samsung Galaxy S7 edge. -- Original message --From: Herbert Scho
Agreed to increase current density to the point where heating could form steam you need water intrusion. Id venture that reports of fractured concrete are due to intrusion failures. More likely freez
And then there is the Austin QRP groups "VIA" VNA that can be a 2-port or simple 1-port analyzer (builder's choice) that will set you back less about $200 with options. http://www.qsl.net/k5bcq/Kits/
You can also add a plastic "paddle" to balance aerodynamic loads. Basically you look at the cross sectional area wind load on each side of the mast mounting point. The idea is the paddle adds enough
Agreed... that why I mentioned the "variable wind direction". The basic idea is to move the center of pressure to the center of gravity and have them both at the mast mounting point. Most Yagi style
Bigger sigh... No its not... it's a choke that many mistakenly call a Bal(anced)Un(balanced). Does it act somewhat like a Balun... yes for the case of a 1:1 but a true Balun can be in other ratios. P