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KD0CQ has recently been experimenting with trying to receive signals at frequencies of up to 4.5 GHz with an RTL-SDR and downconverter. Since a typical R820T/2 RTL-SDR’s maximum frequency limit is about 1.7 GHz, an external downconverter circuit is required.
A downconverter converts high frequencies down into the range receivable by the RTL-SDR. For example a downconverter with a 2.4 GHz local oscillator would convert a 3.5 GHz signal down to 1.1 GHz, which can be easily received by an RTL-SDR….MORE
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The main difference between MD-380 and MD-398 Difference MD-380 MD-398 Time slot Two time slot One time slot Battery capacity 2000mAh 2800mAh Battery type Li-ion polymer li-ion Power 5W 10W Waterproof IP54 IP67 Frequency Range 136-17... Read more
![Uniden SDS200 – Analog & Digital [ VIDEO ]](https://qrznow.com/wp-content/uploads/2019/01/UNIDEN-SDS200-FRONT-rt-1-90x60.jpg)
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TOKYO HY-POWER HL-1.5KFX HF/50MHz Desk Top Linear
Features: Small footprint Light weight- lightest 1kW amplifier in its class Internal power supply 2 antenna output ports 6 meter operation Automatic b... Read more
Brazil Eases Authorization for Radio Amateurs Attending the 2016 Summer Olympics
IARU Region 2 News Editor Joaquín Solana, XE1R, reports that radio amateurs hoping to operate in Brazil during the 2016 Olympic Games in Rio this summ... Read more
Hamfest 2017 – Preview of the Icom IC-7610 and IC-R8600 rigs
In part one of our reports from Hamfest 2017 we have a sneak preview of the Icom IC-7610 and IC-R8600 rigs. We meet the new owners of PW Magazine, and... Read more
IARU Region 1 announce a new edition (8.00) of the VHF Handbook
The new version of the VHF handbook is available in the “Resources” section of the website and can be accessed at IARU Region 1 VHF Manage... Read more
APRS Mobile Communications by VE6AB
APRS Mobile Communications One of the main features of my mobile is a Automatic Packet Reporting System (APRS). APRS is a digital communication... Read more
HAM Radio vital to emergency communications
“COOKEVILLE — It’s a hobby that is considered “old school” by many, but it is a vital component when it comes to communication during dis... Read more
RM Italy BLA-600 Review with Martin Lynch
The BLA 600 is a wideband compact, fully automatic 500W wideband linear amplifier for the HF bands and 6m, from 1.8 to 54 MHz. Totally ideal for runni... Read more
Ham operators stepped in during failure of county’s 911, phone system
Ham operators stepped in during failure of county’s 911, phone system by Loren Genson “ f you need help, you call 911. When the 911 oper... Read more
TYT MD-2017 Dual Band DMR Digital Radio Unboxing
TYT MD-2017 Features 3000 Channels 400-480MHz UHF Frequencies 136-174MHz VHF Frequencies Built-in CTCSS/DCS (Analog Mode) 5W/1W Output Power Repeater... Read more
2 Meter & 70 Centimeter Mobile Halo Antenna Project
“I have wanted to try 2 meter SSB mobile for some time but did not have a horizontally polarized antenna to try it out. Since I had success buil... Read more
Youths asked to pick up amateur radio
Youths asked to pick up amateur radio by Lim How Pim – http://www.theborneopost.com Read this great article: Read more
Morse code Ringtone Generator by M1RGZ
“This page converts text into a morse code ringtone playable on most mobile phones. If your phone can play ‘polyphonic’ or ‘po... Read more
Hamvention® — Same Friends, New Home” is Theme for 2017 Event
Reflecting its new venue, “Hamvention® — Same Friends, New Home” will be the theme when the event opens on May 19 at the Greene County Fairgrounds and... Read more
Amazing Christmas 70cm contacts
“On the 22 of December, two amazing contacts took place on 70cm EME (moon bounce). MX0CNS using a single 17 element DG7YBN GTV Yagi with just 60... Read more
ZF2CI , ZF8/ZF2CI & ZF9/ZF2CI – Cayman Islands
Col, MM0NDX – from DX-World.net – will be active holiday-style from the Cayman Islands (NA-016) between April 25 to May 2, 2015. QRV on 1... Read more
Got Grids? ARRL June VHF Contest is June 13- 15
ARRL June VHF Contest is June 13- 15 Summer is nearly here, and that means it’s time for the ARRL June VHF Contest, June 13-15! Participants in the US... Read more
15th IARU HST world championship is officially open!
The event center is hotel Ibis in Astana, the capital of Kazakhstan. The host of the championship is KFRR, Kazakhstan federation of radiosport and rad... Read more