r/HamRadio

I gotta stop drinking and eBaying

Yeah, bourbon and eBay does not mix. I apparently got myself a complete QRP setup and can't identify the antenna in one of the packages. It starts with a spike for putting in the ground. Then has a ring connector with ground d radicals made from a ribbon cable. The feed point is an SO239 on the side of a red short cylindrical section that is maybe 3 inches tall. The spike screws into the bottom of this and then there is a telescopic whip that screws into the top. At the top of the whip, there is a part to grab and pull to extend the whip that is also red. It says PAC 12 Antenna and on the sides there are four holes to thread in two maybe 18 inch telescopic whips that go to the side.

What is this as PAC 12 has nothing on their website about this?

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u/Six-gun-W8evb — 7 hours ago

What are these? I'm thinking they were parts of ham radio antennas. Can I still use them to create tx antennas? Tnx.

Next to a soda carton to demonstrate size.

u/greenwoody2018 — 17 hours ago

Can A Baofeng UV-5R connect to Retevis RT628

Hey everyone,

I’m pretty new to radios and trying to figure out compatibility between different models. I have a Baofeng UV-5R and was wondering if it can communicate with a Retevis RT628.

From what I understand, the RT628 is more of a license-free walkie-talkie, while the UV-5R is programmable and covers a wider range of frequencies. Is it possible to get them on the same channel/frequency and have them talk to each other? Or are there limitations (like fixed frequencies, privacy codes, etc.) that would prevent that?

If it is possible, could someone explain what settings I’d need to match?

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u/Prior-Implement1028 — 17 hours ago

Radio gadfly finds his calling in the war in Ukraine

Came across a story about a radio guy in Ukraine who upset the Russians so much they tried to blow him up in his house with some drones:

https://euromaidanpress.com/2026/04/20/russia-tried-to-kill-ukraines-most-public-shahed-analyst-with-four-superspeed-jet-powered-shaheds/

MIT Review's background story on the guy:

https://www.technologyreview.com/2024/09/12/1103833/ukraine-russia-drone-war-flash-radio-serhii-beskrestnov-social-media/

u/HugePositive — 5 hours ago

MultiMesh receiver for Meshcore, Meshtastic and Meshcom

https://preview.redd.it/m3gpbof64ewg1.jpg?width=1241&format=pjpg&auto=webp&s=e7fe96c09763fb9118b33820921e8c9624eed701

Hope I don't getting any trouble for this, but I don't like the discussion which Mesh I have to use, which is better, etc., I like all those three ones, so I made a multi receiver.

Actually this are just 3 Heltec Lora V3, 2x 868 MHz for Meshtastic and Meshcore and 1x 433MHz for Meshcom. I used it a few days and the was no interference between those three ones, so I think it works :-) Powered is the hole thing with a 1S, 3.7V LiPo with 1100mAh and a little USB-C charging board.

If you are interested I put it on Thingiverse there you find the Iinfo's what you need. https://www.thingiverse.com/thing:7338939

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u/Logical_Carrot267 — 23 hours ago
🔥 Hot ▲ 110 r/HamRadio+1 crossposts

I made an APRS transmitter. It uses the internal radio.

The code is up on GitHub now, along with a released .fap: https://github.com/yo3gnd/flipper-zero-aprs-tx

I read in quite a few places that the Flipper cannot really do APRS over Sub-GHz. It may yet be coaxed into receiving, but transmitting does work now. The app can store several packet types, keep a small callbook, and expose a few settings to help whatever is on the other end decode more reliably.

It is, however, a fairly dirty hack: FSK being pushed into doing FM's job. Deviation matters quite a bit. Too low and the signal may not even wake the squelch; too hot and it starts clipping. It works, but in a manner that is more stubborn than elegant.

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u/yo3gnd — 1 day ago

Radio settings for transmitting as an amteur.

New to amateur radio and i've been getting mixed sources from online. I have better radio systems i can use but for simple portable, I'm using a cheap UV5R mini as my testing kinda radio.

I'm uk based, M7UZU. I am yet to understand weather on (I assume is same for both bands) 145.5 and 433.5 weather FM, or NFM is correct to use, and weather wideband or narrow band is correct.

The Essex Ham course I did roughly covered ands barely explained this, hence my questioning.

Sorry to appear silly, but everybody learns.

M7UZU, Cheers

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u/iamwinstonlive — 1 day ago

Budget 9:1 balun loose wire question

as to the title. Is this normal? a loose tinned wire.

u/ageless-vermin — 1 day ago

Cheap SOTA mast for N9TAX Slim Jim Antenna

I just passed my tech test and wanting to try some SOTA with 5w HT (2m/70cm). I ordered a Slim Jim Antenna but am a bit confused about what works best masts. I read that carbon fiber is conductive so may effect antenna. Fiberglass poles and such seem rather rare nowadays. I’m thinking that a PVC may work reasonably well to make a 6’ mast that attaches to my backpack? Any other thoughts, suggestion?

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u/bigemf5 — 1 day ago
▲ 2 r/HamRadio+1 crossposts

Is this beofeng uv-5rh radio real?

I understand that they don’t do a 15w version but is it not just the 10w version being exaggerated

u/Fantastic_Berry6543 — 2 days ago
🔥 Hot ▲ 134 r/HamRadio

Old Gear at my deceased Grandpa's house, Wondering if any of it is worth anything?

My Grandpa had a bunch of receivers and radio equipment, wondering if anyone knows if anything here is worth anything.

u/T_Nap24 — 3 days ago

We’re building a student satellite—Help us design a payload you’ll actually use!

Hey everyone,

I’m a college student working on a satellite project, and I’m coordinating the amateur radio / public interaction side of things.

We’re still in development, so I can’t share too many specifics—but I’d really like to get input from the community.

What would you want from an amateur satellite?

Not just passive receiving, but actual ham functionality too. The goal is to make something that’s:

  • Fun to use
  • Accessible (not just for people with huge dishes or expensive setups)
  • Worth going outside and tracking

Some ideas we’ve been tossing around:

  • Repeater (what kind?)
  • Decodable transmissions (images, telemetry, etc.)
  • Small challenges / hidden messages

But instead of guessing, I’d rather ask directly:

What would make you actually use it?

What have other satellites done that you loved?
What felt useless or overcomplicated?
What would bring in newer people vs just experienced operators?

Curious to hear your thoughts

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u/FromNutToNow — 2 days ago

Looking for a way to be a ham radio listner

Quick question. What equipment would I need if I just want to listen in on radio chater, similar to thumbing through the radio in your car.

I just think it would be neat to randomly pic up a number station or communication from a station I orbit. Or even just som random guy just transmitting fallout radio music for some reason.

I'm not really interested in chatting myself.

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u/sindwar — 3 days ago

Newbie and setup help wanted thanks in advance

I’m looking at getting into the ham radio game. My friend has been for years and has been after me to get involved. I’m looking for help with what a decent setup would be that I could put in my car permanently and a very simple setup in the house. I’m planning on getting involved with my local ham groups soon.

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u/Junkjon814-2 — 2 days ago
▲ 10 r/HamRadio+1 crossposts

Tr usdx toroid assembly question

Hey everyone,

I’m currently building a classic (tr)uSDX and I’m a bit confused about how to wind the toroid (FT37-43) T2.

For T1, it’s straightforward:

If it says something like “1T”, I just pass the wire through the core once → done.

But for T2, I’m seeing things like 21T and 3T and that’s where I got confused.

So my current understanding is:

- You wind them one after another using different wires

- Try to keep them close to each other but don’t cross over each other

Does that sound correct?

Or has someone a photo of the classic band bord that i can see how its done?

Would really appreciate some practical advice or photos from someone who has built one successfully 🙏

u/TechKING957 — 2 days ago

How can I connect these two radios togeather (I live in the countryside)

I live in the country where we don’t have a lot of neighbors . I know it not recommend to connect them. But I’m wondering if it can be done. Since it’s the only ones we have at the moment for my kids to go exploring on our land.

u/An4_r3w — 3 days ago

Field power box did well for POTA weekend!

The .30-cal battery field box I recently posted came in very handy for this weekend’s Support Your Parks event. I had no problems running my setup, between this smaller box and my larger 20Ah box I had shared a while back.

The 100w Predator solar panel from Harbor Freight did an excellent job of keeping the larger box charged which was used to run a Xiegu G90. The smaller 7Ah box, since I didn’t build it with a solar charge controller inside, was daisy-chained to the larger box for charging and worked well to run my MacBook, iPhone (used as a portable hotspot for the laptop), and charge handheld radios throughout the weekend.

You can download the 3D print files for the distribution panel of the smaller box here.

u/anselscamera — 2 days ago

How important is tuning/trimming a homemade EFHW?

I'm just getting into the hobby and am really excited by the idea of POTA and SOTA / the minimalist mobile setup. I splurged (or what at least felt like splurging to me) on a transceiver and I've gotten the materials to make a 40m, 4-band EFHW. All the build videos I've watched culminate with the builder setting it up and evaluating it with a vna and then adjusting the length slightly. My transceiver does not have any kind of tuner build in.

Here's the thing. I really don't want to buy another piece of kit that I'm going to use once and then never look at again, even if it's only 50 bucks on Amazon. I feel like I've already sunk a bunch of money into this and I just want to get on the air.

Could anything catastrophic happen if I just measure the length of my antenna wire very carefully and never get a vna? Will I fry my transceiver? Is my SWR doomed to be awful? Realistically, how many cm off does the antenna have to be to start causing serious issues? Will the presence/length of a counterpoise change any of this behavior?

TIA

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u/BeCoolHoney-Bunny — 3 days ago