Topband: Webinar – Waller Flag RX Antenna 101 – How to Construct a WF

“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

Q900 Version 3- ALL BAND ALL MODE HF/VHF/UHF TRANSCEIVER

September 14, 2022 No comments

Here we take a look at the Q900 Version 3 Ham Transceiver which covers all ham bands from 160m up to 70cm. Q900 we introduced an ultra portable full r... Read more

FT-710 – HF/50MHz TRANSCEIVER

September 06, 2022 No comments

FT-710 HF/50MHz TRANSCEIVER SDR circuit configuration that emphasizes basic performance The twin A/D converter circuit configuration, which is equippe... Read more

RX protection limiter with CMCC

August 22, 2022 No comments

RX protection This box is able to protect your receiver against the high power RF signals and prevent from destruction. These high RF signals are comm... Read more

IC-PW2 HF/50 MHz 1 kW Linear Amplifier Pre-release

August 20, 2022 No comments

IC-PW2 Industry First Digital Pre-Distortion (DPD) Function Single Operator Two Radios (SO2R) with One IC-PW2 Read more

IC-905 VHF/UHF/SHF SDR Transceiver Pre-release

August 20, 2022 No comments

IC-905 Icom will announce an exciting industry first at the Tokyo Hamfair which opens on 20th August 2022. Based on its SHF project, the IC-905 VHF/UH... Read more

AOR AR-7400

August 20, 2022 No comments

New Super Fast Air-band Scanner – AOR AR-7400 Features will include: Simultaneous 4 channel air band receiver. Scan/search all air band in just... Read more

Yaesu FT-710 AESS HF/50MHz [ UPDATE ]

August 19, 2022 No comments

Yaesu FT-710 YAESU is excited to announce a new HF/70/MHz/50MHz 100W SDR Transceiver – FT-710 AESS.The new FT-710 AESS is a compact design yet provide... Read more

Download IC-705 Exterior Case 3D Data and Create Your Own Accessories

August 19, 2022 No comments

IC-705 Icom is allowing the download of 3D data of the exterior case of the IC-705 HF/VHF/UHF Mobile Transceiver allowing customers to create their ow... Read more

IC-PW2, will be released [ Promo Video ]

August 18, 2022 No comments

Promotion Video for the long-awaited model, the IC-PW2, will be released. [Simultaneous Release] August 20, 2022 10:10 JST (01:10 UTC) It will be rele... Read more

RX Audite – SDR splitter/switch with protections

August 17, 2022 No comments

This is very powerful device combines TRX switch, RX splitter, RF limiter protection for both RX outputs, INBAND RX antenna input and optional RX prea... Read more

Review

FT-710 [ Update Sherwood Table of Receiver Performance ]

October 02, 2022 No comments

FT-710 The New Yaesu radio was in the 4th position updated today See full List : Link Read more

ROHN Towers – Manufacturers Showcase

September 30, 2022 No comments

We have Todd with ROHN Towers here in the DX Engineering Showroom with Tim, K3LR! Read more

Demo of the Penntek TR 45L

September 29, 2022 No comments

 Penntek TR 45L A brief show-and-tell of the Penntek TR-45L CW memory function and notch filter Read more

Five Insanely Great Ham Radio Portable Operation Accessories

September 29, 2022 No comments

Here are five little pieces of gear that I find insanely helpful in my portable and Parks on the Air operations. Most of these items are quite afforda... Read more

VGC VR-N7500: APRS! Android, iOS, Bluetooth, Dual Band 2m/7cm

September 28, 2022 No comments

The VGR VR-N7500 is a 50 watt dual band radios that leverages android and iOS devices for advanced, yet simple controls using the large screens on you... Read more

XIEGU G106 [ Video Review ]

September 27, 2022 No comments

XIEGU G106 Here we take a look at the XIEGU G106 HF 5 WATT QRP TRANSCEIVER. G106 is a 5W portable QRP model with SDR circuit structure which uses 16bi... Read more

Yaesu FT 710 First Look 

September 23, 2022 No comments

Yaesu FT-710 AESS has finally arrived at Ham Radio Outlet. Join Ham Radio Sensei, Julian Frost (N3JF) as he gets his hands on the new radio for the fi... Read more

The Mystery of the 17th Harmonic

September 14, 2022 No comments

Jack, N4ACD, wants me to share a story that happend. It also shares a intresting thing a harmonics did. Watch to learn more about harmonics and what h... Read more

Xiegu G106 Ham Radio Review – “It’s Just OK”

September 09, 2022 No comments

The G106 seems like a radio that is just about worth what they are charging for it. When considering the cost of HF radios today, the G106 isn’t... Read more

XIEGU G106 HF Transceiver In Depth Review

September 08, 2022 No comments

XIEGU G106 Peter Waters G3OJV, takes an In-Depth look at this new transceiver. He also gives his views on what may have been a hoax review. G106 The G... Read more