Modelling the EFHW in SimNEC
Modelling an EFHW
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M0VUE
- Aug 23
- 1 min
Efficiency testing our 56:1 300w SSB and 150w CW/Data QTH EFHW transformer
Following testing of our new QTH transformer using a Fair-Rite 2643101902 Mix 43 round core, I thought it would be a good idea to do...
39 views0 comments
M0VUE
- Aug 22
- 2 min
New 100w EFHW QTH transformer in final testing
We have been selling the Fair-Rite 2643101902 Mix 43 round core for some time as an ideal core for making 100W EFHW transformers, as well...
100 views0 comments
M0VUE
- Aug 21
- 9 min
Tuning a Dipole or EFHW antenna!!!, and other ramblings.
When we sell kits the biggest question we get after the kit is built is "how to tune the antenna". So, we have written this short blog to...
93 views1 comment
chris57908
- May 10
- 7 min
Building the EFHW with Common Mode Choke
Before we start the build instructions, we would like to say a big thankyou for supporting our shop. Also, you are about to build a...
375 views0 comments
chris57908
- Oct 30, 2023
- 2 min
Building the BCI Filter
Firstly thanks for purchasing a filter from us. The Radio-Stuff.com BCI filter is a high pass filter with a cut off just below the 160m...
167 views0 comments
chris57908
- Sep 21, 2023
- 1 min
Two new YouTube videos
Hi, It seem like I'm now a youtube star with this video from Carl M0SZT. Also Morten LB0FI a client from Norway has made a build video on...
162 views0 comments
chris57908
- Sep 13, 2023
- 2 min
Broadcast Interferance Filters
A little while ago I purchase a Xeigu 6100. One thing I did notice however was an issue where my local AM station transmission bled over...
46 views0 comments
M0VUE
- May 24, 2023
- 3 min
A note on End Feed Half Wave broad band transformer efficiency
The efficiency of an End Fed Half Wave (EFHW) antenna transformer can vary depending on several factors, including the design of the...
200 views0 comments
M0VUE
- Apr 24, 2023
- 3 min
Dipole facts
Dipole length The length of a dipole is determined by the frequency of the electromagnetic wave it is intended to transmit or receive....
35 views0 comments
M0VUE
- Mar 22, 2023
- 2 min
SWR sweep of different EFHW 49:1 transformers
I had a client contact me a couple of days ago with an issue with one of my transformers a 2xFT240-43 transformer. To help them out, I...
278 views0 comments
M0VUE
- Mar 21, 2023
- 2 min
EFHW with built in Common Mode Choke
I wanted to answer the question of where to put a common mode choke on an EFHW and do I need a counterpoise all at the same time. Kinda...
417 views0 comments
M0VUE
- Feb 21, 2023
- 2 min
Another February SOTA G/SE010 40m activation
Firle Beacon is very easy to get to. The car park is at the end of Fire Bostal just off the A27 heading from Brighton to Eastbourn. When...
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M7EFU
- Feb 18, 2023
- 2 min
Review of common mode choke Fair-Rite Mixes 31 and 75
I contacted Chris at Radio-Stuff for advice on choosing a common mode choke to reduce electrical noise in my shack. My hobby is...
40 views0 comments
M0VUE
- Feb 7, 2023
- 3 min
February SOTA G/SE009 Chanctonbury 20 meter activation
The weather forecase was excellent but cold for the 5th February 2023. So I decided to packup and go for a quick SOTA activation before...
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M0VUE
- Feb 1, 2023
- 1 min
An inexpensive and effective Common Mode Choke for Long Wave listening.
One of our Short Wave Listener (SWL) clients recently request a Common Mode Choke suitable for long wave reception from low KHZ to around...
101 views0 comments
M0VUE
- Jan 16, 2023
- 1 min
Our Ultra Portable EFHW antenna makes a breif YouTube appearence.
I sent one of the Ultra Lightweight EFHW antenna to Carl M0SZT to try. It is quite interesting to see Carl use the antenna along with...
46 views0 comments
M0VUE
- Jan 5, 2023
- 4 min
Short Wave listening
What is short wave listening? Shortwave listening, also known as SWLing, is the hobby of listening to shortwave radio broadcasts from...
22 views0 comments
M0VUE
- Oct 31, 2022
- 1 min
CQ World Wide Contest, playing with my antennas day 2
So after playing around on day 1 of the competition at home I decided to got onto a SOTA SE-009. Unfortunately it got really windy so I...
28 views0 comments
M0VUE
- Oct 31, 2022
- 2 min
CQ World Wide Contest, playing with my antennas day 1
This is a quick blog, and one which I have done to answer a couple of questions asked of me at this years Hamfest in England. A couple of...
13 views0 comments
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