r/amateurradio

Skywarn radio for my daughter.

My daughter (f17) is absolutely obsessed with weather and becoming a meteorologist. I want to get her a radio so she can listen to Skywarn directly. As a single dad with very little disposable income, what is the cheapest radio i can get that will allow her to listen in? I am aware that this is a shortwave radio and that she would need a license to talk on channel. I will be making sure she is very aware of that.

EDIT: Thanks for the information. I really appreciate it.

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u/kelevra1441 — 1 hour ago

They call it a drip loop.

Where the antenna coax connects I did a loop. Looped maybe 3 times (LR400 flex) my Swr is between 1.4 and 1.6 on 2m/70cm should I take the loop out? Thank you

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u/Keysurfer64 — 4 hours ago

Off-grid digital modes

Just looking for some guidance or experience with running digital modes off-grid. Essentially what I’d like to do is build some sort of setup that could be 100% off-grid to use winlink, aprs, and possibly ft8 or some other digital mode to get communication in and out (I have zero experience with ft8 so I haven’t really looked into its usage much). Essentially this would be for redundancy of communication and a way to possibly receive and transmit information to family and others when phones aren’t available. Ideally this would also be able to use vhf/uhf or hf depending on the needs at the time, I’d be fine having to switch radios and connections if I don’t get a radio that’s capable of both.

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u/Sweendog2016 — 8 hours ago

SWR, Antenna Tuners and Efficiency.......

I have recently acquired an MFJ 993 antenna tuner. Works great. I have a vertical multibander that needs help - it doesn't resonate near where it should and I can't easily get at it to do anything physically to correct the problem. The tuner 'solves' this problem....

I am aware that the device doesn't actually do anything to the antenna - it just matches the impedance of the load/antenna so that my radio "sees" 50 ohms and is happy. What I'm looking for is a relationship between the actual SWR of the antenna and the efficiency of the whole system. i.e. if my radio has 100 watts output into an antenna with a (say) 10:1 SWR how many Watts actually get radiated? Is there a formula for this? Yielding a result in % or dB - either will do..

I'm assuming that an antenna carefully tuned to 1 : 1 at a certain frequency will put close to 100
% of the power sent to it. Increase the SWR and the efficiency goes down. But by how much?

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u/ArthurQBryan — 7 hours ago
▲ 19 r/amateurradio+4 crossposts

VUURWERK v1.5.0 released: UV-K5 firmware with a voice-seeking spectrum

Just released v1.5.0 of VUURWERK, my custom firmware for the UV-K5. The main feature is a VOX mode in the spectrum analyzer that scores every frequency for voice instead of raw signal strength, so carriers and data bursts stay flat while actual conversations show up as bars.

Arrow keys hop between them, PTT locks onto the one you are listening to, and when you exit the spectrum that frequency is set on your VFO so you can answer. Also added F then EXIT, which resets the current VFO to clean simplex by clearing RX and TX tones, repeater offset, reverse, and scrambler in one press. Useful when the radio shows a green RX light but stays silent, which is usually a leftover RX tone. This release also fixes a bug where exiting the spectrum could switch you to the other VFO, plus some audio path issues on exit.

Scanning is faster than stock and the manual was rewritten with screen diagrams for everything. https://github.com/Tokeloshe/vuurwerk-firmware/releases/latest and the boot screen should say v1.5.0 after flashing.

Field reports welcome. 73, KC3TFZ

u/Popular-Ad5171 — 5 hours ago

FRG 8800

Going through my father’s things. He was into shortwave radios. I don’t know anything about that stuff. I see this sells pretty well on eBay. I would like to sell this but I cannot find the power cord so I cannot test it. I searched online but had no luck finding one. Does anyone know where I could get a cord for this. Thank you.

u/Docfinkelstein — 10 hours ago

Preamp recommendations for VHF

Hey guys, I would appreciate if any of you would share what pre amps you like, specifically for VHF. I don't plan to transmit (i'm not a ham), but everyone here seems very knowledgeable about what to buy and all that.

I listen specifically to railroad communications (160-161mhz), and I was using my TV antenna temporarily in my attic. I then made a ground plane which I mounted on top of my roof, but I noticed I feel like I actually receive less with the home made antenna, than my TV antenna. Got 30 ft of RG213 , no balun (a ham friend of mine told me that with a groundplane, I don't need one.)

I would appreciate any tips of how I can boost my reception!

u/DiscountMinute8939 — 6 hours ago

Linear loaded doublet

Looking for a bit of a sanity check on putting together a linear loaded doublet.

My plan is to put together about 70-90 ft of element, either 450 ohm window line, 300 ohm twin lead or just 3 conductor electrical wire. Is there a significant difference here between the three for this type of setup? Perhaps just the usual caveats about rain loss? I’d rather go with the latter two for weight but wasn’t sure if there’s any material difference here.

I figure since I’m feeding it with window line or twin lead into a balanced tuner the length of the antenna isn’t critical (and going this direction to lower losses and get multi band capabilities without fussing trying to get a match feeding it with coax), but open to feedback here.

The goal is to get something perhaps slightly more efficient on 80m than an 88’ doublet, and maybe a smaller variation for portable use. Not sure if the juice is worth the squeeze as well and I should just stick with a regular short doublet?

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u/Non_resonant — 9 hours ago

Tilt-over mount for DX Commander

Hey everyone,

I am looking for ideas for a tilt-over system for the DX Commander Classic. I have one in my head, but I am not sure about it. It is more PVC-driven. But want to ask the community first for better ideas. My goal is to let the ground plate stay on the ground.

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u/DependentSalt1330 — 9 hours ago
▲ 728 r/amateurradio+1 crossposts

Hey I saw this in a thrift store

So Im new and don't know much, would this work as a ham radio? I think it's some sort of military doohickey. And Is it worth 100€?

u/M4KK0_7_ — 21 hours ago

Noise source all bands

I see this kind of noise over almost all bands. S3 to S4 level. I am trying to trace the source. What can cause this kind of noise pattern?

u/Chipper1685 — 14 hours ago

Using DroidStar and EchoLink from the US with a foreign callsign

Hello everyone,

I have a general question about using internet only amateur radio applications while visiting the United States.

If a licensed amateur from another country uses only apps such as DroidStar and EchoLink over cellular data or local Wi-Fi, without transmitting on amateur radio frequencies, is that generally considered acceptable while in the US?

If so:

  • Is it acceptable to connect to US EchoLink nodes or DMR networks while identifying with a foreign callsign?
  • Is it also acceptable to connect back to repeaters or EchoLink nodes in the operator’s home country while physically located in the US?
  • Are there any legal or practical considerations that I should be aware of?

Thanks in advance.

I’d appreciate any clarification. Thanks!

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u/Tris_Memba — 9 hours ago

New HAM looking for first radio

Hello

Got my license a few days ago and I'm looking for a radio.

I've had some suggestions such as Xiegu X6100 and FTX-1.

I don't know exactly what I want.

Basically I want to be able to transport it and have it as base station. I enjoy videos on YT with some SOTA and portable antennas and I'd like to have that option. It is a hobby and I'm not looking to be the very invested HAM. I like the company, telecommunications and learning things. The thing is that I'd like to avoid discontinued devices.

I saw some videos and people have mixed reviews. Comments say things that are missing, like bluetooth (50€) and gps (50€) which are purchased separately and some say negative things about the portability of the device.

Currently I have only handheld radios and haven't made my first QSO.

Currently Yaesu has a cashback offer so I could get the FTX-1 around 1100€.

What would you suggest?

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u/OldAbbreviations12 — 17 hours ago

How much am I giving up by going for 20W instead of 100W?

I want to buy my first HF rig that can do SSB. (I have a 5W QRP labs kit that was super exciting to assemble, but learning CW is taking me a while) My primary plan is to do POTA/SOTA stuff with it so I need it to be portable. I've mostly been looking at the FT-857 (and to a lesser extent FT-891 and FT-897), but a bit hesitant to pull the trigger because of the high cost. The G90 feels like it could be a cheaper, smaller and lighter alternative. But it's only 20W. (The X6100 also caught my eye for similar reasons.)

I'm wondering what the practical difference is between a 100W rig and a 20W (or 10W) rig on SSB. I'm not really interested in contesting, so if nobody hears me on pile-ups that's fine. But I would like to be able to make contacts far away.

(If there are intermediate options you want to recommend, please go ahead. My main thing is I do not like touch screens.)

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u/RationallyDense — 1 day ago

Attic antenna is frying my 2nd floor LEDs

Due to small house+small lot I don't really have an outdoor option for a (permanent) antenna. Ok, fine, I've been doing the attic antenna thing for a little while now (originally a dipole, now using a cobweb). Not ideal, but the antenna basically works. The current problem is the antenna is occasionally causing problems with the LED bulbs in the 2nd floor bathroom. The light+shower vent has a circuit board of LEDs acting as one of the bathroom lights. At one point when I started to transmit SSB on 17m, I heard a faint pop noise from the bathroom. So that light is fried (the vent fan still works fine). Also elsewhere in the bathroom there are a pair of regular screw-in bulbs, and I've already gone thru 2 different LED bulbs as they will start just flickering randomly. I'm currently experimenting with CFLs since presumably the circuitry is somewhat different and might be more resistant to RF (maybe). I haven't fried those yet.

The presumption is the RF is hitting the power wires and is causing the problem. I'm wondering if I try to create some inductance near the light sources would solve the problem. I have various ferrites and toroids lying around, and I'm experimenting wrapping some 14 gauge THHN wire around some clip-ons as pictured (using some unspecified ferrite type). The idea is to splice this in near the vent, and another set of wraps near the other light fixture. I've got some type 77 toroids, and can get other kinds if needed. I'm only playing with spooled wire at this point, I haven't installed anything so far. I haven't even looked yet to see how much room I have to install more conduit.

I'm running a Yaesu FT-710 at 100 watts, and would prefer not to lower that since I'm surely losing a little bit of power just pushing the signal thru the roof. Has anyone else solved this particular problem? Am I barking up the wrong tree?

u/razor_train — 1 day ago

Looks as if I'm the gingerbread man on this band in digital

https://preview.redd.it/ntgx66aorcbh1.png?width=704&format=png&auto=webp&s=3f630245125d1edce4c1d3bc10755f442f843cf2

The World Wide Award thrills some, annoys others, and, for most, probably...meh. Just under 18 hours to go. S&P, S&P, S&P as fast as you can....

pse wish me gl.

BTW, was not sure if blurring the other hunter's calls was necessary, but there it is. If a mod would like to chime in for future reference, I'd be interested in what you have to say on the matter.

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u/root_127-0-0-1 — 20 hours ago