Search found 274 matches
- Sun May 28, 2023 5:54 am
- Forum: General Discussion
- Topic: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z
- Replies: 11
- Views: 26573
Re: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z
as for cans, I've these https://www.oneodio.com/products/a71-studio-wired-headphones bought them time ago, they were discounted, pretty nice response and good isolation, they're also available on amazon, also notice that if desired, it's possible to buy an additional boom mic for these phones https:...
- Thu May 25, 2023 9:30 am
- Forum: General Discussion
- Topic: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z
- Replies: 11
- Views: 26573
Re: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z
The first thing which popped to my mind was the "Luxembourg effect", but I sincerely doubt it may be the case, although it can't probably be excluded; a secondo cause may be due to some "manteinance" performed on transmitters, in such a case during a tuning/alignment/testing proc...
- Tue May 23, 2023 1:51 pm
- Forum: Questions & Advice
- Topic: Balun for a end fed random wire?
- Replies: 5
- Views: 14528
Re: Balun for a end fed random wire?
Forgot, the "9:1 transformer" isn't a magical object, the transformation ratio may be appropriate for some antennas but totally unappropriate for others, keep in mind that if the antenna wire is near (or below) 1/4 wave at a given frequency, the impedance will be very low so dividing that ...
- Tue May 23, 2023 10:39 am
- Forum: Questions & Advice
- Topic: Balun for a end fed random wire?
- Replies: 5
- Views: 14528
Re: Balun for a end fed random wire?
Regarding the impedance transformer, an easy to build one is shown here http://www.kk5jy.net/LoG/ http://www.kk5jy.net/LoG/images/transformer-schematic.png http://www.kk5jy.net/LoG/images/thin-transformer-inside.jpg it's a "galvanic transformer" (that is, the antenna is electrically isolat...
- Thu May 18, 2023 3:19 pm
- Forum: General Discussion
- Topic: The SULA antenna
- Replies: 63
- Views: 119308
Re: The SULA antenna
thanks to both of you, I'll try my hand at building it and I'll tell you...unfortunately my conditions are what they are as a space for antennas...the best is a balcony practically closed on 3 sides...I have an active loop similar to ala1530 that up to 2 meters is fine, @Andrew I'm also looking for...
- Thu May 18, 2023 12:28 pm
- Forum: General Discussion
- Topic: The SULA antenna
- Replies: 63
- Views: 119308
Re: The SULA antenna
hello .... a curiosity .... how does it behave towards the high portion of the HF? like in 15 and 10 meters amateur radio?...thanks and congratulations for everything! Hi there, Martyn, welcome on this forum. Regarding your question, I hope 13dka answer included the infos you were seeking for, I'll...
- Mon May 15, 2023 5:43 am
- Forum: Log Sharing & Broadcast Frequencies/Schedules
- Topic: Italy is back on MW!
- Replies: 2
- Views: 12834
Re: Italy is back on MW!
here's a partial list https://it.m.wikipedia.org/wiki/Emittenti_radiofoniche_italiane_in_onde_medie no english version, sorry. but the table should be easily readable even w/o a translator Fact is that, after the switch off of RAI MW transmitter, the government changed the laws/regulations and nowad...
- Sat May 13, 2023 5:46 am
- Forum: Questions & Advice
- Topic: any reasonably-sized directional antennas for FM broadcast radio reception?
- Replies: 5
- Views: 14906
Re: any reasonably-sized directional antennas for FM broadcast radio reception?
I wonder if the jungle job could be assembled using replacement telescoping antennas that are sometimes available for shortwave radios? Three telescoping antennas, a bit of wood and some wire? well, yes, if the antennas are long enough they will fit as a reflector, add two pieces of wire for the di...
- Wed May 10, 2023 4:00 pm
- Forum: Questions & Advice
- Topic: any reasonably-sized directional antennas for FM broadcast radio reception?
- Replies: 5
- Views: 14906
Re: any reasonably-sized directional antennas for FM broadcast radio reception?
Another easy to build and quite efficient antenna is the H-DoubleBay by W4GRW, the antenna can be built for the HF or for the V/UHF bands, the original website disappeared in the internet limbo, but luckily was archived so a good copy is still available here http://web.archive.org/web/20210216050430...
- Mon May 08, 2023 11:57 am
- Forum: General Discussion
- Topic: The Belka (-DSP/-DX/-v3) appreciation thread
- Replies: 34
- Views: 73541
Re: The Belka (-DSP/-DX/-v3) appreciation thread
which antenna did you use ? The belka whip or an external one ?