Begging**K5PGW's permission I continue: There is no need for the radiator to be longer than an electrical 1/4 wavelength in order to shunt feed it, in fact the converse is normally preferred. It's e
https://ac6la.com/aecollection10.html John KK9A Trapped tribanders have shorter elements, which has an effect on pattern, and they have non-optimal element spacing for any particular band, which agai
Why all of the complications? The preamps are unity gain. Doesn't the output voltage tell you something about the input voltage? If they saturate during a measurement, turn the power down until the
Aha.. I was hunting around for a circuit description. Yeah, it looks there's a noninverting buffer followed by a 1:1 transformer. So it's more of an impedance buffer. What Z does it present to the e
I have no personal experience. Here is a site that might be helpful: https://electrical-engineering-portal.com/measure-ground-resistance-clamp-meter That said, what is your ground system's purpose,
Hmmm.. Every other reference I see about using one of these says that a loop is required. On 10/2/2019 11:00 AM, Bryan Fields wrote: On 9/29/19 2:51 PM, Julio Peralta via TowerTalk wrote: Does anyone
That's a Lotus 123 file. Older versions of Excel should open it. If you send them to me, I will try to open them with Excel 2000 and convert them to (still antiquated) Excel files for you. Wes N7WS
Anyone have any experience with one of these? https://www.ebay.com/itm/MS-S4A-WEB-controlled-REMOTE-ANTENNA-SWITCH-4-POSITIONS-2-KW-PEP-Ready-for-use/202778787695?hash=item2f368ebf6f:g:ec4AAOSwmxVceS
Not dumb at all. To simulate what you are really looking for, I would measure s21 between the input port and an unselected output port, if it is open. The selected port should be terminated in 50 o
You need to read further. "This 4positionantenna switch can be used for 46 to 75 ohm systems, plus handle 2000 watts SSB, 1500 watts CW.(Tested for extended periods with ACOM1500-power amplifier) " I
To add to this, this seller also has models with up to 7 positions, available complete or in kit form. There is also a three position one and the listing: https://www.ebay.com/itm/MS-S3-REMOTE-ANTENN
I'm with the other Wes on this one. If I understand correctly you only have a load on the upper side of the knot. I would join the ends with any old knot and tie a alpine butterfly loop on the upper
Hi Gedas, Originally you used the flag on a flagpole as an analogy. Absent the flag, I see little need for a lot of tension in the loop. Then if the flag is hoisted by that portion of the loop locat
Okay. I guess my thinking was along the lines of my situation. I too have a horizontal extension on the tower to support my inverted-vee. But my load is entirely vertical with the apex of the antenn
For a source it looks like you have one right in your town: https://www.centervilleiron.com/new-metal That said, IMHO 10' sticking out of a HAMM or equivalent is too much. Put it inside the tower dow
This can be modeled in EZNEC to remove some of the assumptions. A/B test with copper then steel for the material. Wes N7WS I'm using #18 solid Copperweld wire from Davis RF for my 160m Inverted-L a
About six months in the AZ desert. Paul, W9AC _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://li
I had a Tristao tower here for many years. It was six, 10-foot sections and used formed stops to support the sections. I never had the whole thing up, but I did use the bottom three sections, unguy
Or maybe not. W8JI has mentioned the Finco Antenna Company and their use of the principle in the 1950s. Wes N7WS _______________________________________________ ____________________________________
It's been a long time but I can remember when QST showed up in the mail, I would voraciously read it cover-to-cover. The latest one showed up a week ago, I looked at the TOC and "How's DX"; saw that