Amateur Radio

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A Lemmy Community to share links about and for amateur (ham) radio to advance the technology, and promote communication and international goodwill. This community IS NOT for CB, GMRS, MURS, FRS, etc topics unless they are related to ham radio in some way.

We won't tolerate personal insults, illegal activity, or anything contrary to good amateur practice.

If asking questions about regulations, please include your country because we recognize that, while the hobby is international, regulations often aren't.

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TrojanHam

Build my first magnetic loop today, holy sh.. (sh.itjust.works)

submitted 1 month ago by LH0ezVT to c/amateur_radio

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My first magnetic loop for 2m :)

Really simple construction: bent ca. 2mm brass pipe soldered directly to the outside of an SMA plug, inside of the plug soldered to the red wire as "input coil". Tunable by squeezing the ends more or less close together.

SWR of <1.2 at resonance, not bad. Impedance is at roughly 44+j2 Ohm, also not bad for totally eyeballing it without any prior calculations.

I can reach the nearest 2m relais just fine at 2W, although to be fair I can do the same with a short whip antenna. More testing to follow. Holy shit, this actually works!

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[–] [email protected] 2 points 1 month ago (2 children)

Thought it's just FM on the 2m

[–] [email protected] 2 points 1 month ago* (last edited 1 month ago)

Nope, I believe 144.000 is 2m sideband.

Edit: Don't take my word for that though. It's been quite a while since I've been on two meters frequently. But I do know there is a portion on two meters for sideband.

Edit 2: Actually, I want to say it's 144.200.

[–] [email protected] 1 points 1 month ago

144.100 - 144.275 MHz. Calling frequency is 144.200.

2M sideband and VHF DX is a lot of fun. I remember working satellites using 2M/70CM sideband as well.