Excellent performance as well as exceptional build quality. Paul, W9AC _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTal
Using TLW a while back, I was modeling a 1/8-wave line and it looks like no matter what the termination Z at the end of 1/8-wave line, the Z seen at the transmitter is always the line Zo. Depending
No confusion. To achieve that 50 +j0 result at the source end of a 1/8-wave line still requires a 50 +j0 termination. However, no matter what is happening on the load end of the line and as long as
In the U.S., UL Standard 1363 prohibits the cascading of relocatable power taps (i.e., "portable outlet strips"). Many municipal ordinances incorporate Standard 1363 into their local codes. Outside
Take a look at the Cutler-Hammer product description, and Figures 4-1 and 4-2. http://www.eaton.com/ecm/idcplg?IdcService=GET_FILE&dID=56325 The product brochure even goes on to state that IEEE reco
I'm trying to locate a current copy of IEEE C62.41.1, "Guide on the Surge Environment in Low-Voltage (1000 V and less) AC Power Circuits." Anyone know whether or not that publication recommends the u
BTW, the material that Jim Brown (K9YC) referenced from SurgeX is excellent. In thinking the secondary suppressor problem through, I thought that only a "single-mode" L-N bypass to neutral (rather th
It's s joint document between ANSI and IEEE. Apparently, it's a compendium of three sections in total, one of them discussing installation practices. Paul, W9AC ______________________________________
I just purchased Standler's book and it offers some interesting insight concerning branch circuit surge protection. On p. 289 of the 2002 Dover Publishing edition, Standler recommends the popular "a
I had a bit of difficulty locating the original article from Loren Windom. It's in the September, 1929 issue of QST (re-printed Dec., 1966) and is entitled "Notes on Ethereal Adornments," and sub-tit
That's my take after reading Sevick's Fourth ed. If it's a 1:1 choke with a reasonably-controlled low to moderate Z on the load side of the balun, then for HF, I would lean toward coax on a #31 core
Yes, you're referring to a "fan dipole" where a single coaxial line feeds multiple wire radiators. The topic should be covered in any post WWII ARRL Handbook. Here's an on-line reference, although I
Just finished reading the grounding article in the July issue of QST. I'm surprised more use is not made of double-bolted lugs for master ground busses and radial plates. Many commercial copper MGBs
Great summary, Gary. Wish that would have been emphasized about about 50 messages ago! Paul, W9AC _______________________________________________ _______________________________________________ Towe
Good point, but if you were serving in Iraq and the situation occurred to you (however unlikely), I am 100% confident you would not sit back and say "I deserve to have lost my $300,000 home while se
circuits can be used with a common neutral and the 240 volt circuit can also be used. The two hots also need to be on a connected breaker (double pole)." Gary's last sentence should be emphasized. I
In the U.S., [NEC 210.21(B)(3)] a 15A receptacle can be used on a 120V/20A branch circuit when the circuit supplies more than one receptacle. For a single receptacle on a 20A circuit, the receptacle
The neutral for premise distribution is created at the utility transformer secondary. Speaking of electrical distribution and use of neutrals, this evolution of plant step-down architecture has alwa
The transformer's secondary winding creates the 180-degree phase relationship on the 120/240 side -- not the transformer's primary. Paul, W9AC The neutral for premise distribution is created at the
Before, or after the person requires CPR? The MGN is the return leg Yes, that's exactly what I mean. Paul, W9AC _______________________________________________ ______________________________________