Hi Hank, This is an exact quote from page NIST 25 of the proposed FY2019 NIST budget: < www.osec.doc.gov/bmi/budget/FY19CBJ/NIST_and_NTIS_FY2019_President 's_Budget_for_508_comp.pdf> "NIST will disco
Hi Jim, If you base load a 68 vertical on 160 meters it will create very high voltage at the base of the vertical which may damage the base insulator. Much better to use top loading to avoid high vol
Hi Jeff, I use 14 AWG THHN stranded wire for temporary radials laying on the ground. Its lays flat. www.wireandcableyourway.com/14-awg-thhn-stranded-building-wire-500ft-or-2500ft-spool.html 73 Frank
Hi Tonno, Broadside phased Beverages and short verticals do work! As you should have seen in your modelling, broadside spacing determines the angle of radiation with optimum front-to-side ratio. I've
I sent a pdf copy of N7DF's April 1984 CQ Article to Mirko via direct email. I'll send a copy to anyone else upon request to my email address 73 Frank W3LPL -- Original Message -- The same here :( I
Hi Terry, I've had the same problem with some PCB mount F connectors. eBay has multiple sources for soldering lug you need, this is the least expensive of them www.ebay.com/itm/Zierick-761-375-Lockwa
Hi Pete, I'd suggest you proceed with an inverted-L 73 Frank W3LPL -- Original Message -- I have an AB-577 with a C-3E on top, and am interested in the possibility of shunt-feeding it for 160 - 100 w
This is an alternative calculator: www.qsl.net/co8tw/Coax_Calculator.htm For 200 feet of RG-213 terminated in a 36 ohm load, the additional cable loss at 1.8 MHz is only 0.026 dB . 73 Frank W3LPL --
Hi Bob, As Wes points out, the AC6LA calculator is overly simplified and not very accurate. Despite that, the answer to your question remains the same: The additional loss caused by a 50 ohm coaxial
Wes, Sorry, I mis-spoke about which calculator is which... But my clear message remains unchanged: The additional loss caused by a 50 ohm coaxial cable feeding a 36 ohm load is insignificant at 1.8 M
Hi Buzz, This topic has been examined in detail over the years, such as: http://www.w0btu.com/Optimum_number_of_ground_radials_vs_radial_length.html http://ncjweb.com/bonus-content/k3lcmaxgainradials
Hi Pete, The bad news is that 215 feet is not long enough to produce good performance from a Beverage. It will work for a BOG, but that's not your best choice. Could you install two or three short ve
Hi Ignacy, Salt water is very special! In a salt water environment potentially the entire Fresnel zone -- where as much a 6 dB of gain is obtained from ground reflection -- is in a highly conductive
Corollary: You can't have too many antennas except when they interfere with each other which they often do on Topband where a wavelength is approximately 500 feet... Even on 20 meters, the pattern of
JC, I have well over a million QSOs in my computer log but not even a single QSO with OK1YQ 73 Frank W3LPL _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflecto
Hi Jamie, I use my AA-54 frequently in exactly the manner you're using your AA-23, I've never had any reason to be suspicious of any of its readings. I'm lucky to have no AM broadcast stations within
Hi Jamie, I forgot to mention that nearby conductive objects, especially nearby towers can significantly affect the base impedance of a vertical. Nearby on 160 meters is about 200 feet... 73 Frank W3
Hi Rick and Steve, Steve's QTH is almost directly north of the south geomagnetic pole. His latitude is approximately 32 degrees south geographic latitude and approximately 43 degrees south geomagneti
I agree Clive, there is no reason to switch from high quality UHF connectors such as Amphenol 83-1SP silver plated connectors on 6 meters or below. They have much better center pin contact pressure t
Hello Arunas, While the relatively new 4.3-10 family of "mini DIN" connectors is far superior to any connectors we've discussed in this thread, their cost is nearly ten times higher. On the other han