NEVER look at the demon in the corner…
You mean Phil? He’s been helping me arrange the room
667
joined 2 years ago
I bet it’s just off-gassing the spine glue or cover coating or ink. Set them someplace outside but shaded and out of the elements for a few days.
All fair points, and not an odd question.
I’ll say I’m trying to get a radiogram from the US to the destination country affected by a natural disaster. I am confident they are fine, but public service can take some time to get restored and I’d like to get a simple message to them so we can establish a very basic two-way via radiogram. The first message from me to them is a “this is a radiogram and for as long as public utilities are unavailable, you can contact the ham who delivered this message to let me know how you are doing.”
I’m in a similar way that I can’t get on HF :/
I heard there is a browser extension which does this
ADHD crew skips days all the time.
In the era before the average net worth of a Congress person was in the tens of millions, it made sense because it prevented them from their wages being held hostage.
There is certainly a lot to learn, and you would benefit greatly from joining the hobby officially. If you are US-based, you can take the amateur radio exam after memorizing the answers for the exam (a legal and encouraged practice), the exam itself can be administered remotely via Zoom.
I am beyond my technical knowledge if I tried to explain why we use transformers to get an impedance match; I only know what we do.
Great questions, one which highlights my own knowledge gap beyond knowing that for a given feedline and antenna combination, you’ll have some measure of impedance. At the most basic level, your radio will “see” some impedance value. In the amateur radio world this is generally 50Ω. If our antenna system (feedline + radiator) presents 450Ω (quite common), we use a 9:1 transformer to get it to match. This allows us to use our radio on that system without (1) stray current returning to the radio and damage our transmission circuits, and (2) at full power but with inherent loss of signal owing to antenna inefficiency.
Case in point, I have a commercially-purchased multi-band EFHW antenna which presents varying amounts of impedance to the radio. This system includes a transformer (I think it’s 9:1) so that on the bands of interest, there’s a resistance match and as a result an SWR that’s suitable to make decent transmissions on.
As a tangential example, J-pole antennas have a built-in matching system which uses no special parts. It’s composed of a matching section and radiator. The combination of matching section, radiator length, and physical feedpoint allow this type of antenna to sort of self-manage impedance.
The difference here is that a j-pole is a monoband antenna, and a long wire with transformer can often be functional on many bands, depending on length, where the lowest useable frequency is the inverse of its length.
TIL my toilet is sentient, and very unhappy.
What challenges are you facing? It’s a small mercy that antenna fundamentals are basically the same across all frequencies. The resonant element must be sufficiently long as to present an impedance match (or be brought down through via a transformer; 9:1, 49:1, or whichever flavor you need).
On 40m (~7Mhz) a dipole would need to be ~67’ long. You can get away with shorter, bearing in mind the compromises which come with that.
I’m going to try and hop on 20m in my high-noise floor area (lots of EMI) and try to QSO on 10-12W.
I suppose I should practice Morse code, too.
How about you?
E: Fediverse PSA: Getting your (US) license has never been easier—there is no Morse code requirement! Just memorize the answers to the questions (perfectly legal) and take the test, I did all three of mine online, one of which was from a beach on a Pacific island during the pandemic!
I got it into my head that I would like to see a spherical depiction of my QSOs. Azimuthal and other representations weren't cutting it for me.
I managed to coax an LLM to output my ADIF into a KML so I could better visualize the reach of my QSOs, and I am quite stunned. 20m has almost complete global reach, as you'll see below. Admittedly, on CW it probably does. In these visualizations, the vast majority of contacts are on FT8 20m, but there are a few dozen SSB contacts as far as Indonesia. Usually I made these contacts well before sunrise.
This is a representation of my entire logbook, so any QSO not from the SW US are 10m.
Setup: IC-7300, barefoot, 15m mast, and a 20m twinlead j-pole. Having been temporarily based in a residential area, I had quite a high noise floor from various EMI sources, and could have probably done better with weak stations had my noise floor been lower.
Moving to the west:
More west, Australia prominently visible:
Antipodal view:
Looking toward the east, the west coast of Africa coming into view:
Africa; the lonely QSO east of Madagascar is Reunion Island, got this one on FT8:
You can see a sharp decline in activity about mid-screen.
About 1m 15s remaining:
45s after 1200Z:
Granted, this is the IARU Championship. But that's a lot of people on the radio.
20m at 1500Z.
Side note: for the last three days I’ve enjoyed nearly bottomless noise floors; been making SSB QSOs to Japan, Indonesia, and even Rarotonga. Then–today of all days–the AirBnB beside my house has turned on their aircon and it’s completely wiping out all but the strongest signals. My waterfall looks like college ruled notebook paper:
1830Z Update:
1900Z. This is wild.
Man, what an amazing day which will be long–if not impossible–to forget.
In the late 90s, I observed my first partial eclipse from South Florida. Then and there I decided I needed to see a total solar eclipse. Nearly 30 years later, I made good on that little personal promise. The moment I realized I would be in position to get along the path of totality, I made plans with my spouse to do so. We saved the date and planed the logistics.
I, of course, ensured my radio was packed and fully functional; charged the battery the night before. We left Del Rio, the closest place we could find reasonable accommodations, at 0400L. By 0700L we had hoisted and strung the OCF dipole and we were ready to go in DL98rv, just under the central path of the eclipse on the side of Hwy 131 in Texas just beyond the US-Mexican border.
The Tech section of 10m was silent that early, but I kept calling CQ until I started getting QSOs, pretty much went ten in a row in nearly the same number of minutes once the band came alive.
I had wanted to participate in the research project contest, but the instructions and bonuses were a little overwhelming, but I did manage to make one QSO during totality. On the one hand, I was expecting propagation attenuation, but the QSO I made was over 1,500 miles away.
I've read over and over about experiencing totality. Photos will never do it justice. Words doubly so. If you've ever been on the fence about traveling to see totality–just do it.
Lessons learned or confirmed:
- Get there at least two days before; scout potential setup locations. We scouted several locations with our radio setup in mind. We didn't want to risk trampling on private property, and the OCF antenna (being a 7-band) has nearly a 200' wingspan on its longest dimension. We needed plenty of space while also being considerate to others who would certainly want to see the eclipse as well. We must be good stewards of Amateur Radio.
- Get lodging as near as you can, as far in advance as you can, maybe no more than an hour away.
- Set up at least six hours before C1 (eclipse start).
- Make considerations for food and toilets. I was fortunate that our travel partners had a trailer with a functioning toilet. In my eagerness, I had completely overlooked the requirement for toilets.
- Don't underestimate the value of a radio day checklist.
- A 7-band OCF dipole is absolutely unwieldy for portable ops. I love the mast I've been using, but the antenna itself is a huge pain–and a huge footprint–to get up. For future ops, I plan to go with a monoband. I am planning to make KB9VBR's 10m window line j-pole to hoist on the mast instead.
- Small auxiliary/desk lights or headlamp, red is my preference, for log work before sunrise. I was struggling to get my radio configured and my log setup before the sun came up.
I am eager for your questions and feedback!
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Hey everyone, that guy doesn’t know how to use the three seashells lol