Архив за 28.12.2017

Comment on Quick Start Guide by Keith Wilson

I’ve had good success using a manual antenna tuner (MFJ 904H) as a filter for HF direct sampling reception. This tuner is designed for ham radio use, and many similar ones are available. I have this one on hand. I used a 50 ohm dummy load and tuned the tuner using an antenna analyzer for a 1:1 SWR on the band of interest. Then the tuner is used between the antenna and the dongle as a filter when listening on that band. This does a great job of getting rid of a strong local AM station that made HF reception unusable. Good copy is obtained for single side band (SSB) and morse code (CW) signals in the ham bands, as well as WWV. (ham Keith in Utah)

Comment on Quick Start Guide by Keith Wilson

I checked the Device Manager (Windows 7 Home Premium SP1) and the dongle shows as Realtek 2832U device, working properly. I did turn off the automatic driver update per your suggestion. The Realtek driver is dated 5/21/2012. Do I need a newer one, perhaps for the correct tuner chip? (R820T2) The ProgDVB 7 seems to have trouble scanning for channels (“…tuner type error”) even though the dongle shows up as “{BDA} REALTEK DTV Filter”

Antennas • Re: Interesting old antenna, could use help identifying

Folded Ground Plane, Folded Monopole
think of it as a folded fullwave dipole cut in half on a groundplane (using 1/4 wave elements), similar to a round plane is a half wave dipole cut in half on a groundplane
http://www.eham.net/ehamforum/smf/index ... 373.0.html

Statistics: Posted by snn47 — Thu Dec 28, 2017 10:41 pm


QUESTION:: For CenCal UHF / VHF signal chasers, does anyone know what IS that on 127.450mhz, in AM…

QUESTION:: For CenCal UHF / VHF signal chasers, does anyone know what IS that on 127.450mhz, in AM mode? It's air traffic, but I can't find it listed among the TRACON freqs on Radio Reference dot com...

(RSS generated with FetchRss)

Broadcasting using FreeBSD?

Anyone ever setup a BSD broadcasting machine? If so could you point me to a guide of give some good tips?

submitted by /u/jshg46
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Antennas • Re: Low Frequency Antenna

If you want to buy an active antenna using a in relation to the lower wavelength (15 000m) very short whip (0.02 m) look here
http://www.bonito.net/boni-whip/en/index.html

For those who want to have more information on electronical short antennas (passive and active) for general application look here https://synergymwave.com/articles/2016/ ... tation.pdf

Statistics: Posted by snn47 — Thu Dec 28, 2017 9:02 pm


И так я понял всем стало интересно на что и чем я пытаюсь принять noaa. Краткий…











И так я понял всем стало интересно на что и чем я пытаюсь принять noaa.
Краткий обзор оборудования.
1. Антенна самоделка. 8м от земли.
2. RTL-SDR R820T доработка.
3. Кабель 75 ОМ 7мм фирма не известна. Длинна около 10м
4. Ноут 2х ядра 1гб оперативки. Win 10 x86
5. Условия приёма.

Сегодня много хороших проходов.
Буду пробовать последний шарп.
И использовать ноут мощнее. (4х ядра 6гб оперативки, ссд.)

UPD:
Вроде все получилось.

Comment on Wintelive: Tutorial and Updates to the Windows Telive TETRA Decoder Implementation by E3V3A

“the target machine actively refused it 127.0.0.1:42000”

You have a firewall running?

Какую антенну посоветуете купить для приема 50мгц — 1ггц ?…

Какую антенну посоветуете купить для приема 50мгц - 1ггц ?

Can someone explain how to strip a coax cable?

I'm planning on building a v-dipole antenna for NOAA, but I don't understand how to properly strip the coax cable.

submitted by /u/Timetravelinghippie
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