“Join us for a webinar on Feb 16, 2017 at 9:00 PM EST Register now! –
https://attendee.gotowebinar.com/register/7735767269616129539
JC N4IS covers the concepts and decisions to build your own WF low band high
performance receive antenna. Topics include:
1- What is a Waller Flag
2- Horizontal or vertical poles.
3- Common node noise, and detuning towers or TX antennas
4- Phasing lines and transformers
5- Feed lines and chokes
6- Preamplifiers, filter and R/T switches
7- How to measure pattern (polar plot)
8- How to test and evaluate results.
73
Ken K4ZW”
Videos
Equipment
New Kenwood ST-995SDR ?
stay tuned for details… Source:Link Read more
The new Silphase R1 SDR receiver
Frequency coverage RX 0.1–30MHz Frequency resolution 1Hz Dial step 1Hz to 1KHz Dual VFO Direct sampling 16bit high speed 122 M/s ADC Mode CW, SSB, AM,... Read more
New RigExpert Green ZOOM Family of the antenna & cable analyzers
“New RigExpert Green ZOOM Family of the antenna & cable analyzers Dear RigExpert Followers, We are glad to present you a New RigExpert Green... Read more
Andromeda 100W Transceiver -Apache Labs
Sneak peek at the Andromeda 100W Transceiver…… 10th GEN Intel 6 Core i7, 7 inch built in touch screen and an option to add up to two Exter... Read more
ICOM LC-192 for IC-705
Making your field operation more fun and convenient with the LC-192, the IC-705’s utility backpack. The IC-705 fits perfectly in the optional LC-192 m... Read more
Perseus SDR – EladUSA
Description Buy from EladUSA with Factory Support from Microtelcom PERSEUS is a software defined VLF-LF-MF-HF receiver based on an outstanding direct... Read more
Assembled a prototype of Geckokapula V2 a dualband 70cm/13cm handheld FM/CW radio
Assembled a prototype of Geckokapula V2 a dualband 70cm/13cm handheld FM/CW radio. It also does AM and SSB reception in addition to FM and CW. An awes... Read more
Review
Silphase R1 receiver [ VIDEO ]
Silphase R1 receiver. Telescoping antenna 1.15m. Location is city center Warsaw, Poland. Outside temperature +4 Celsius degrees. Frequency 1413 kHz. I... Read more
MFJ-4403 Voltage Conditioner
Protects against reverse voltage, over-voltage, voltage transient, and short circuits. Super noise and ripple filtering … Power supply bufferin... Read more
Is the Airspy Discovery HF+ sensitive on VLF? Testing with a Garrett metal detector
“It occurred to me that my Garrett metal detector is a signal source at 13.6 KHz, so I decided to test to see if the Airspy hF+ Discovery is abl... Read more
RFinder B1 Android DMR Radio Unboxing and Initial Setup – RFinder Repeater Directory
RFinder B1 HT Radio, Android DMR and FM This is the device that you have been waiting for! The RFinder B1 is now available for pre-order. Imagine a d... Read more
Super Battery Booster MFJ-4416C
Today`s compact 100-watt HF rigs are designed to operate from about 12-16 volts, with output signal distortion, output power problems, and transceiver... Read more
![Introducing the IC-705 QRP [ ICOM Official Video ]](https://qrznow.com/wp-content/uploads/2020/07/IC-705_video_400x263-190x122.jpg)
Anan 7000DLE II Review
The ANAN-7000DLE MKII monoblock SDR transceiver incorporates an Intel 8th Generation i5/i7 core computer, the SDR client software is preloaded and cal... Read more
![Silphase R1 receiver [ VIDEO ]](https://qrznow.com/wp-content/uploads/2020/07/head-img-90x60.png)
![Silphase R1 receiver [ VIDEO ]](https://qrznow.com/wp-content/uploads/2020/07/head-img-180x120.png)
