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Topics - ThaDood

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The stuff that Boomer has collected is now a really nice read, and info downloads! (And then some.)      http://boomerthedog.net/radio.html
Now, probably the best on-line source for Carrier-Current AM operations. Not to mention AM C-QUAM Stereo via Part #15. Another good source is this page about James R. Cunningham,  http://lowpowerradio.blogspot.com/2015/11/low-power-am-circuits-of-james-r.html   
However, what I need to do is to make a good .PDF copy of the Ernest Wilson book - Carrier Current Techniques: The Wired Wireless Broadcasting, from 1979's Panaxis Productions. He shows you how you can build it all from the ground up.   

Here's the full, unchopped, title:  Radio Survivor - Social Distancing Sparks Interest in Part 15 Unlicensed Broadcasting, but Caveat Emptor.  Here's the link,      http://www.radiosurvivor.com/2020/09/21/social-distancing-sparks-interest-in-part-15-unlicensed-broadcasting-but-caveat-emptor/

On Part #15 FM, there no actual RF power out limit, but just that limiting FS limit of 250uV measured at 3 Meters away. I do remember that someone in the 1990's Panaxis EBN (Experimental Broadcaster's Newsletter) calculating with the possible RF OUT would be to a 1/4-Wave GND Plane Antenna, and it was something like 600pW - 800pW. That's picowatts, 10 to the -12! That small!!! 

I did a spectrum test on that 4:1 DX ENG 5kW Balun.    https://www.dxengineering.com/parts/dxe-mc20-v4-1  I did a DC GND continuity test and measured 1.6 Ohms. Not bad, but I did look inside, and I didn't really like how they 1/2 soldered the connections inside, so I silver soldered them with the 140W gun. Passed DC GND tests at just .6 Ohms. Then, I took two 100 Ohm, 1/2W, resisters, (For 200 Ohms.), and tied them to the Dipole bolts. Then used my MFJ-269Pro ANT Analyzer and spanned from 1740kHz to 180MHz. WOW!!!! Solid, flat, 1:1 VSWR from MW to around 27MHz, but 11M and 10M were still a 1.1:1 match. Then, curved to 1.2:1 about 63MHz, and was still that all the way to 2M, which was a 1.3:1! Then, the curve raised about 1.5:1 around 158MHz. Damn!!!!! Now that's wide banded! Anyone ever put one of these Baluns up on a Dipole, or a Longwire? For over 25 Years, I've used the W2DU 4:1 Current Choke Balun, running barefoot power, with nice results. However, I believe that the power rating of that is 300W. The 5kW rating on the new Balun is certainly overkill, but at least 500W won't be a problem.

Well, this sucks...      https://www.clickorlando.com/news/local/2020/09/25/mystery-leak-investigation-continues-on-international-space-station/           This could also explain why I haven't heard the ISS Cross Band HAM Repeater on 437.800MHz FM in the last week.

UPDATE 9/26/2020: Huh... The night after I posted the preceding, before bed about 2AM EST, I programmed in 437.800MHz in to a Yaesu FT-70DR Fusion HT, and immediately, 9-landers were in there calling and making grid exchanges. So, that X-banding repeater is still rockin'.

Huh? / FCC site on domestic SW stations.
« on: September 23, 2020, 0710 UTC »
Yeah... I found this totally by accident,      https://www.fcc.gov/general/fcc-high-frequency-stations        Of course, I was looking for something else on WHRI's website, (Which really sucks!), but this is usually how I find things from the FCC, almost never from their own site search, but via off the wall and none related. Your Tax $$$$$$'s at work.

General Radio Discussion / Updated LPAM info site.
« on: September 22, 2020, 0543 UTC »
The sit that had a proposed LPAM station availability map on www.lpam.ws is now,       https://recnet.com/lpam

I doubt that anyone will actually try to move on this subject now, but we can dream, right?

MW Loggings / WNRP 1620 Pensacola, FL now heard over Cuba at night?
« on: September 18, 2020, 1833 UTC »
For at least the last week and a half now, I've heard 1620 WNRP in there at night, battling it out with Cuba. I've even heard their EAS tone-out for Hurricane Sally. So, has this station either changed power, or radiation patterns, at night? The only other time that I've heard this station is at sunrise.       https://radio-locator.com/info/WNRP-AM

Equipment / Radio Jay's AM & FM Mega Shootout 2020 Updates!
« on: September 07, 2020, 1741 UTC »
He does it again this year. Not techie with spec's, but decent 'layman's terms' to share with anyone wanting an AM / FM portable today,   https://radiojayallen.com/2020/09/07/am-fm-mega-shootout-2020-updates/

Huh? / FCC Chair: New LPFM & Noncomm License Opportunities Coming Soon?
« on: September 04, 2020, 2032 UTC »
From Radio Survivor,     https://www.radiosurvivor.com/2020/08/10/fcc-chair-new-lpfm-noncomm-license-opportunities-coming-soon/     As if the FM band isn't crowded enough.

Amateur Radio / ISS with Crossband repeater!
« on: September 03, 2020, 1910 UTC »
I wasn't too sure to either put this under Satellite, or here, in Amateur Radio. So, I tossed a coin, and here it is:

ARISS News Release No. 20-13

September 2, 2020—The ARISS team is pleased to announce that set up and installation of the first element of our next generation radio system was completed and amateur radio operations with it are now underway. This first element, dubbed the InterOperable Radio System (IORS), was installed in the International Space Station Columbus module. The IORS replaces the Ericsson radio system and packet module that were originally certified for spaceflight on July 26, 2000.

Initial operation of the new radio system is in FM cross band repeater mode using an uplink frequency of 145.99 MHz with an access tone of 67 Hz and a downlink frequency of 437.800 MHz. System activation was first observed at 01:02 UTC on September 2. Special operations will continue to be announced.

The IORS was launched from Kennedy Space Center on March 6, 2020 on board the SpaceX CRS-20 resupply mission. It consists of a special, space-modified JVC Kenwood D710GA transceiver, an ARISS developed multi-voltage power supply and interconnecting cables. The design, development, fabrication, testing, and launch of the first IORS was an incredible five-year engineering achievement accomplished by the ARISS hardware volunteer team. It will enable new, exciting capabilities for ham radio operators, students, and the general public. Capabilities include a higher power radio, voice repeater, digital packet radio (APRS) capabilities and a Kenwood VC-H1 slow scan television (SSTV) system.

A second IORS undergoes flight certification and will be launched later for installation in the Russian Service module. This second system enables dual, simultaneous operations, (e.g. voice repeater and APRS packet), providing diverse opportunities for radio amateurs. It also provides on-orbit redundancy to ensure continuous operations in the event of an IORS component failure.

Next-gen development efforts continue. For the IORS, parts are being procured and a total of ten systems are being fabricated to support flight, additional flight spares, ground testing and astronaut training. Follow-on next generation radio system elements include an L-band repeater uplink capability, currently in development, and a flight Raspberry-Pi, dubbed “ARISS-Pi,” that is just beginning the design phase. The ARISS-Pi promises operations autonomy and enhanced SSTV operations.

ARISS is run almost entirely by volunteers, and with the help of generous contributions from ARISS sponsors and individuals. Donations to the ARISS program for next generation hardware developments, operations, education, and administration are welcome -- please go to  www.ariss.org  to contribute to these efforts.
(Cool!!!! I have the same dual band rig. Happy ISS DX'ing!!!!)

The Chinese stuff is making more attractive head-ways. And for around $470.00, it's hard to turn something like this down. https://swling.com/blog/2020/09/a-review-of-the-xiegu-g90-general-coverage-transceiver/
Question is, how does it do to fight IMD and strong signal overload? I don't like that it doesn't really have a convenient RF Gain Control up front, but that's nit-pickin'. Even for under $500.00, I'd want to wait and find out if it can take the test of time.

Ya know... I can tell that I'm getting old, since now I'm bitching more about things that might possibly make sense, but won't happen. Case in point? When the Sony Walkman's were introduced in 1979, they were pretty damned expensive. However, radio stations did walkman give-aways in the early 1980's. And, I remember in 1982 a station doing a "$1,000 Stereo Component System Give-Away!". I also remember car stereo system give-aways. Then, when CD Players came out, there were stations that did give-aways of CD players and CD's themselves. They actually did the CD thing until the early 2000's as well as DVD's and Blue Ray. But, does anyone ever remember an AM Stereo station promoting AM Stereo capable receivers to gave away? Yeah... Neither do I. Fast Forward to +30 years later. There are several stations that are IBOC for HD Radio. Most of them are struggling, and most listeners are either listening on-line, or to that station's analog counter part. But, just how many of these stations are actually promoting the HD Radio receivers that can receive the HD Radio signal? (Uh-huh... Crickets.) Station managers!!! Have a clue!!! If stations are willing to do the expense to push a digital medium, then go all the way. Promote and do contest give-aways of HD Radios. There... That's my latest bitch and passing thoughts on the subjects.     

General Radio Discussion / All Digital AM??? An ENG's perspective.
« on: August 26, 2020, 1755 UTC »
Has this been posted and linked here already?   http://www.engineeringradio.us/blog/2020/04/all-digital-am/
Not a bad read.

Too bad that they didn't mention RF tech, other than IC's and wireless headsets.

After doing rip-down for Field Day 2017, a friend of mine asked if I wanted abandoned, ground run, RG-11 coax. Mind you, it's pretty much useless as actually coax, due to years of water contamination, but I see the potential in that solid, outer, aluminum, conductor, that has a heavy PVC coating. The potential is using that for various antenna construct projects, or even as a great GND conductor, at better than 1/2" diameter. Thus far??? I've made an experimental 2M Delta Loop for 144MHz SSB, and that hears stations during the ARRL VHF contests. (I need way better coax to that than RG-59 for TX'ing, but still a nice RX test.) Together, the friend and myself, ripped out more than 1/8 of a mile of that old RG-11. Plans??? Make a LW / MW W.O.G., (Wire On Ground.), O.C.F. Dipole, and various Loop Antennas. Has anyone else done this with trashed RG-11? Hey, the price was right.

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