va3db, to hamradio
@va3db@mastodon.radio avatar

What saddens me is so many hams think a dipole is best because it presents a "perfect match" of 50ohms. Wrong. A dipole is roughly 72 ohms if you are lucky and wildly different depending on height and structures nearby.
Yagi antennas are even worse depending on the design and often need an antenna tuner hidden at the antenna. Get the lowest loss feedline you can use and don't feel guilty about the tuner in the shack.

#HamRadio #AmateurRadio #Antenna

sjvn, to tv
@sjvn@mastodon.social avatar

The best indoor TV #antenna you can buy: Expert tested https://www.zdnet.com/home-and-office/home-entertainment/best-indoor-tv-antenna/ by @sjvn

There's still a lot of good #TV available for free over the air, especially if you like older broadcast shows. Here's what you need to watch these channels

jos1264, to Software
@jos1264@social.skynetcloud.site avatar
N4JAW, to amateurradio
@N4JAW@mastodon.radio avatar

Active sun, changing bands conditions. Taking along #youkits #hb1b & #linkeddipole #antenna for more #pota #parksontheair #morsecode activation options. #qrp #qrpradio #amateurradio #hamradio @POTAspots

ai6yr, to hamradio
@ai6yr@mastodon.radio avatar

Experimental Wet Noodle Antenna! (from @w6ah ) #antenna #hamradio #wetnoodle https://youtu.be/9EmDv-mmnOw

ai6yr, to hamradio
@ai6yr@mastodon.radio avatar

I have seen @w6ah make a contact on a wet noodle antenna (yes, really), and now I have seen everything. #hamradio

ai6yr,
BelfastRoadster, to tv
@BelfastRoadster@birds.town avatar
itnewsbot, to AppleVisionPro
@itnewsbot@schleuss.online avatar
zapytaj, to random Polish
itnewsbot, to amateurradio
@itnewsbot@schleuss.online avatar

HF In Small Spaces - Generally, the biggest problem a new ham radio operator will come across when star... - https://hackaday.com/2024/02/03/hf-in-small-spaces/

DrewCommins, (edited ) to random

Note to self:

When working in the attic, remember that the shingles are attached with nails. Those nails protrude about 1/2" through the roof decking.

Something to keep in "mind" when raising my head near said decking.

Ouch!

#hamradio
#antenna

itnewsbot, to random
@itnewsbot@schleuss.online avatar

No Dish? Try a Portable Weave Helix Antenna - When you think of satellite communications, you probably think of a dish. But that... - https://hackaday.com/2024/01/28/no-dish-try-a-portable-weave-helix-antenna/

mima, to fediverse

How did syuilo find this low-effort shitpost I just replaced a few words on, I literally did not mention him (despite how tempting it is to actually do ​:koakuma_giggle:​, but it kinda is rude to mention people for such a random post ​:sagume_think:​) ​:koishtare:​

Does he have an #antenna listening for every mention of his handle or #Misskey without the hashtag ​:chuckling_okuu:​

RE: https://makai.chaotic.ninja/notes/9op6nkgkch

heronfoxphoto, to Apollo

The #Apollo #spacecraft included 2 scimitar #VHF #antennas for short-range communication with Earth, the Lunar Module, and the lunar surface.
The Block II #CSM, pictured here, moved the #antenna to the Service #Module from the Command Module.

Get a print of this image or another at https://heronfox.pixels.com/featured/apollo-service-module-scimitar-antenna-heron-and-fox.html

#ApolloProgram, #ScimitarAntenna, #ServiceModule, #ApolloCSM, #Electronics, #Radio, #Photography

andthisismrspeacock, to tv
@andthisismrspeacock@mas.to avatar

While those of us in the Northeast US are doing #storm prep and worried about outages, seems like a good time to remind you that you should get a #TV #Antenna.

You can get a really good one for around $150 (plus the cost of a handyman to stick it on your roof if, like me, you have a thing with heights):

https://www.channelmaster.com/collections/outdoor-tv-antennas

You can search your address here to find out where to point it:

https://tvfool.com/index.php?option=com_wrapper&Itemid=29

#Snow #Snowstorm #FreeTV

hackbyte, to diy
dynode, to hamradio
@dynode@mas.to avatar

Any piece of wire can function as an #antenna, also long runs of galvanized steel nailed to poles 😋 #hamradio #swl

mattotcha, to random
@mattotcha@mastodon.social avatar
ai6yr, to hamradio

Quick contact to Portland, Oregon from the VCFD training center parking lot. #hamradio

video/mp4

ai6yr,

Antenna is a street sign supporting an end fed wire, 5 feet off the ground. #hamradio #antenna

nono2357, to random French
va3db, to hamradio
@va3db@mastodon.radio avatar

A resonant antenna isn't necessarily great. Mobile whips are made resonant too.

P.S. resonant dipoles are not 50 ohm at resonance either.

#HamRadio #AmateurRadio #HamR #Antenna

itnewsbot, to hamradio
@itnewsbot@schleuss.online avatar

Directional Antenna Stands Tall - When you think of directional ham radio antennas, you probably think of a Yagi, cu... - https://hackaday.com/2023/12/05/directional-antenna-stands-tall/

dynode, to hamradio
@dynode@mas.to avatar

Built a #70cm #groundplane #antenna out of a wheel spoke and some galvanized steel strips. Seems to work OK but I still have weak reception of a repeater that is basically line of sight. Another #2meter repeater is full quieting on receive so I suspect a coax or receiver issue. #hamradio

itnewsbot, to amateurradio
@itnewsbot@schleuss.online avatar

DIY Loading Coil Shortens Antenna Lengths - A newly licensed amateur radio operator’s first foray into radios is likely to be ... - https://hackaday.com/2023/11/20/diy-loading-coil-shortens-antenna-lengths/

itnewsbot, to amateurradio
@itnewsbot@schleuss.online avatar

A Canned Ham Ham Antenna - If you’d have asked us for odds on whether you could successfully turn a canned ha... - https://hackaday.com/2023/11/16/a-canned-ham-ham-antenna/

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