Topband: HEBA antenna

I'd like to see a version of this for 160M: https://www.radioworld.com/news-and-business/headlines/wqvram-is-granted-cp-to-use-heba-antenna-at-night -- 73, Jeff KH6O / 6 _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Topband: Solar eclipse radio project

*Amateur Radio Operators Needed for Help with Solar Eclipse Project* The Case AmateurRadio Club, W8EDU , the club station at Case Western Reserve University in Cleveland, Ohio, is asking for amateur radio operators to help with a research project centered around

Topband: DL8LAS video showing generous use of F-connectors

Andree -- wonderful to see someone else using F-connectors and 75 ohm feedline! 73, Jeff KH6O - Message: 6 Date: Fri, 5 Jan 2024 18:13:32 + (UTC) From: Andree DL8LAS To: topband reflector Subject: Topband: HI-Z 4-8pro DL8LAS Message-ID:

Topband: Annular solar eclipse on 14 October

It's always interesting to hear how conditions briefly change during an eclipse: https://en.wikipedia.org/wiki/Solar_eclipse_of_October_14,_2023 http://www.arrl.org/news/solar-eclipse-qso-party-seeks-amateurs-and-radio-enthusiasts-for-global-experiment 73, Jeff KH6O _

Topband: Digiwave feedline

Colleagues, I purchased a 500 foot roll of Digiwave coax via Home Depot. It's double shielded (braid and foil) and is sweep tested up to 3.5 GHz. I'm unable to determine the country of origin. Any comments on short runs of Digiwave feedline for HF or VHF? 73, Jeff KH6O _

Topband: WTB Hi-Mound "bug in a coffin" key

My first semiautomatic key (early 1960s) was a Japanese Hi-Mound bug with the plastic cover. If you have one to sell please let me know! 73, Jeff KH6O _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Topband: Antennas and saltwater

> Ideal is if you can run some RG58 out to the beach and plunk it next to the > water. Also use 4 radials there. > Enjoy. > Ed N1UR Ed's comment reminds me of the AM broadcast band vertical antennas mounted on concrete foundations located in the back-waters of San Francisco Bay -- directly atop

Re: Topband: Topband Digest, Vol 237, Issue 14

> From: "m.r.c." > PLEASE lets NOT go down the digital ruined the world rabbit hole again! > its a discussion for a different venue PLEASE Good morning MRC, If a particular wide-band mode has caused the noise floor on 160 to rise 10-20 dB to the point where only QRO++ stations can be copied, I

Topband: The "new" Topband

Colleagues, Have any of you attempted to get on the 630 meter band? As a US Coast Guard radioman in the 1970s, 500 kHz was the worldwide maritime CW calling frequency; almost all night-time traffic occurred on 600 meters. While stationed at Coast Guard Radio Honolulu (NMO), I'd copy stations

Re: Topband: Misbehaving verticals

As a practicing mathematician, I can assure you that it's impossible for a computer model to capture *every* possible variable involved in real-life physical situations. We see that in not only the antenna models but the climate models, too. 73, Jeff KH6O _ Searchable Archives:

Re: Topband: Topband Digest, Vol 235, Issue 2

Colleagues, I subscribe to the digest version of this list and keep seeing the same content repeated many times. Please trim other folks' comments when you reply (just as I did -- you see nothing included except my comments.) (When you reply, there should be an option for editing included quoted

Topband: Lead paint on older tower

Colleagues, depending upon the age of our towers, we might find ourselves in this predicament (on a smaller scale of course):

Topband: A tribute to tower climbers

https://www.radioworld.com/news-and-business/programming-and-sales/spotlight-on-broadcast-tower-climbers-in-new-documentary?utm_source=SmartBrief_medium=email_campaign=0028F35E-226C-4B60-AC88-AB2831C8A639_content=5FC23F99-30C5-4E4F-8C9D-D0A3B345CD1D_term=5e35c2b9-3044-4235-9961-04d879406e09 73,

Topband: Gates transmitter history

If you're running a Gates xmtr on 160, then you might be interested in this:

Topband: Skirted vertical antennas for MF broadcast

I'm surprised that the broadcast industry is just discoving this topic. My library of decades-old antenna handbooks covers this quite well:

Topband: History of directional MF antennas

This article describes the history of the development of directional MF antennas on our neighbor, the AM broadcast band. 73, Jeff KH6O

Topband: TV coax + F-connectors

Colleagues, I was very happy to see the discussion regarding the use of television feedline and F-connectors. I thought I was the only ham in the universe using that combination. While it's true that the connectors are not weather-resistance, a coating of black asphalt sealant* takes care of

Topband: Square "loop" antenna for 160

Colleagues, I have to live with CC homeowner restrictions. I plan to erect a disguise wire antenna around the perimeter of my roof; total length will be about 190 feet. Elevation will be about 20 feet above ground and will be fed with 150 ohm twin lead.* My question is: Should this be a

Topband: Broadcast band pattern maps

Even though this if for the BC band, it might prove useful to some of us: http://www.nf8m.com/patternmaps.html http://radio-timetraveller.blogspot.com/ 73, Jeff KH6O _ Topband Reflector Archives - http://www.contesting.com/_topband

Topband: Sudden propagation suprise

Did you all notice that suddenly, 160M conditions picked up at 2200Z, January 26, and just as quickly died off at 2200Z January 28th? I'm going to make a prediction: Even though sunspots are almost non-existent, I foresee a spectacular propagation event on 10M beginning at 0001Z February 3, and

Topband: Choke?

I'll be erecting a 95-foot Inverted-L antenna. At the shack end of the antenna, right before the insulator, I'll need to wrap the wire around itself a few times so that it doesn't slip through the insulator. Because the wire itself is insulated, is there any negative affect, such as a choking

Re: Topband: Cheating the system

John wrote: Just for being nosey, I ran the ft8 software last night before bed to see what I could see and boy, there were stations from all over the world on topband, happily working each other. 73John - M0ELS = John -- were those

Re: Topband: [Glowbugs] Former US Coast Guard transmitting site FS

Rico." Jeff KH6O On Tue, Dec 12, 2017 at 7:53 PM, Roy Morgan <k1lk...@gmail.com> wrote: > Why would the Coast Guard have a radio station in Wisconsin? The Great > Lakes? > > Roy sends. > > On Dec 12, 2017, at 6:20 PM, Radio KH6O <radio.k...@gmail.com> wrote:

Topband: Former US Coast Guard transmitting site FS

11 acres includes 300 ft tower and 3 out-buildings in Medford WI: https://gsaauctions.gov/gsaauctions/aucitsrh/ 73, Jeff KH6O _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: future of ham radio

Jay, VERY nice construction work on your 475 kc gear! I spent years getting paid to operate on 500 kc 12 hours per day. Glad to see you folks persevered to transfer a portion of the 600 meter band to the amateur radio service. Shore stations had the real estate for effective antennas and ran

Re: Topband: future of ham radio

> From: > Hooray Nick ? best piece of writing on this whole subject by farIn my > 60+ years of hamming, the changes in technology is EXACTLY what has kept me > so interested over that time...If all there was today was still AM phone and > xtal-controlled rigs, I guess

Re: Topband: Solar eclipse and 160m propagation

I just did an internet search of "radio propagation during an eclipse" and many pages of research articles came up. Remember, an eclipse is a local event whose path is a narrow swath with a width no more than 160 miles. See, for example, http://www.eclipse2017.org/2017/maps.htm. 73, Jeff KH6O

Topband: Which service is primary in 1900-2000 kc?

Just saw this in the ARRL Letter: "In an unrelated action, the FCC allocated 1,900-2,000 kHz to the maritime mobile service (MMS) on a primary basis for non-Federal use in ITU Regions 2 and 3, and limited the use of this allocation to radio buoys on the open sea and the Great Lakes. Amateur Radio

Topband: That vaguely familiar water tank on a cliff....

Colleagues, My government job takes me on quite a bit of travel. On a recent flight from Washington, DC to Boston, I was sitting in a starboard window seat. This was my first flight into Boston so I was enjoying all the sights. Then I saw it. An unusually shaped water storage tank* on a cliff

Re: Topband: Modeling the proverbial vertical on a beach

Anyone who is familiar with the San Francisco Bay Area has noted KGO's three AM broadcast band transmitting antennas located *IN* the water of the East Bay. From KGO's history page: Three 300-foot towers were constructed, each anchored in salt water. KGO became the first San Francisco station to

Re: Topband: VK3ZL SK today

May I respectfully suggest that someone collect all these condolence messages and forward them to his XYL? I'm sure it would provide some comfort to her to know how far his friendship extended across the world. 73, Jeff KH6O _ Topband Reflector Archives -

Re: Topband: Field Day 630M Beacons / On-air Demo

Gosh, all the years that I worked ships from around the Pacific nightly on 500 kc (with ship working frequencies of 425, 454, 468, 480, and 512 kc), I never thought the 600M band would have hams using it. It's wonderful that the band will be alive again with CW. I was stationed at US Coast Guard

Re: Topband: Rig Question

I'm still living in the 60s. I use a Galaxy GT-550 for non 160M work. 73, Jeff KH6O / 6 _ Topband Reflector Archives - http://www.contesting.com/_topband

Topband: Using coax as twinlead.

Colleagues, This discussion regarding using parallel lengths of coax as a twinlead feedline is quite interesting and would solve some problems I've encountered. I need foundational knowledge of this -- can someone point to such a reference? 73, Jeff KH6O / 6 _ Topband Reflector

Topband: QRSS mode

I know that the 600 Meter Research Group is utilizing QRSS for their experiments; that was the first I'd ever heard of the mode. Note that the 600 meter band was the former MF maritime CW band, with 500 kHz being the international CW calling and distress freq'y for about 80 years. 500 would be

Re: Topband: Topband Digest, Vol 119, Issue 18

On 11/15/12, topband-requ...@contesting.com topband-requ...@contesting.com wrote: Send Topband mailing list submissions to topband@contesting.com To subscribe or unsubscribe via the World Wide Web, visit http://lists.contesting.com/mailman/listinfo/topband or, via email, send a