Search found 118 matches

by Andrew (grayhat)
Mon Oct 02, 2023 7:24 pm
Forum: General Discussion
Topic: Little antenna "experiment"
Replies: 7
Views: 4110

Re: Little antenna "experiment"

KL7MJ wrote: Sat Sep 09, 2023 1:45 am I'm looking forward to testing the slinky EFRW against my homebrew magloop!
why so, use an antenna for TX and another one for RX, as far as I know, there's no law forbidding it :D
by Andrew (grayhat)
Sun Oct 01, 2023 12:23 pm
Forum: Questions & Advice
Topic: Paddle for KX2
Replies: 6
Views: 3982

Re: Paddle for KX2

have a look here https://www.amazon.com/Mini-Key-Automatic-Morse-Shortwave/dp/B0BCFNQTFF and here too https://www.amazon.com/stores/PUTIKEEG/page/F551B48B-9FBF-477F-A117-DAE0D6BD057A sure, they aren't Vibroplex or Begali, yet the price is interesting and they also offer spare parts, if needed, plus ...
by Andrew (grayhat)
Mon Sep 11, 2023 1:05 pm
Forum: Questions & Advice
Topic: Receiving Ant. Question, Please
Replies: 5
Views: 2407

Re: Receiving Ant. Question, Please

Hi all, Thanks for leads, and thoughts. Sure is a lot to know, for me. Have always been very weal in ant. theory. Stay in touch, Bob Here I am ... or better said here we (the forum community) are, feel free to post questions and discuss doubts :D A last note, as Thomas knows (yeah, I think I "...
by Andrew (grayhat)
Fri Sep 08, 2023 7:27 am
Forum: General Discussion
Topic: Little antenna "experiment"
Replies: 7
Views: 4110

Re: Little antenna "experiment"

Nice work Andrew! I'm beginning to think that an EFRW is a great general purpose antenna, so long as you have a tuner. I have a 35.5/17 EFRW that does very well for me, but I think that the longer the antenna and radiator, the better. My current antenna project is a travel EFRW using a pair of slin...
by Andrew (grayhat)
Mon Sep 04, 2023 12:34 pm
Forum: Questions & Advice
Topic: Receiving Ant. Question, Please
Replies: 5
Views: 2407

Re: Receiving Ant. Question, Please

try this forum (same "property" :D)

https://swling.net
by Andrew (grayhat)
Sat Aug 12, 2023 5:21 am
Forum: General Discussion
Topic: Diamond HF-20cl as POTA antenna?
Replies: 3
Views: 3010

Re: Diamond HF-20cl as POTA antenna?

Greetings I wonder if anyone has used the Diamond hf-20cl mobile antenna as a POTA antenna with a ground spike or tripod elevated antenna? I would like to discuss or get ideas for ground radials or ground screen for using the antenna a a quick install field antenna? It's a great antenna, center loa...
by Andrew (grayhat)
Wed Aug 09, 2023 1:41 pm
Forum: General Discussion
Topic: Little antenna "experiment"
Replies: 7
Views: 4110

Re: Little antenna "experiment"

Nice work. With regards to both EFRW & EFHW antennas, does raising the feedpoint/transformer height above ground make a difference in impedance or efficiency? I'm planning on installing a 132ft EFHW at home, hoping to get the midpoint & far end at 30+ feet. I've been wondering if it will ma...
by Andrew (grayhat)
Tue Aug 08, 2023 1:38 pm
Forum: General Discussion
Topic: Little antenna "experiment"
Replies: 7
Views: 4110

Re: Little antenna "experiment"

Nice work. With regards to both EFRW & EFHW antennas, does raising the feedpoint/transformer height above ground make a difference in impedance or efficiency? I'm planning on installing a 132ft EFHW at home, hoping to get the midpoint & far end at 30+ feet. I've been wondering if it will ma...
by Andrew (grayhat)
Tue Aug 08, 2023 12:41 pm
Forum: General Discussion
Topic: Little antenna "experiment"
Replies: 7
Views: 4110

Little antenna "experiment"

Being curious, as I am :D and since the idea has been whirling in my head for some time now, I decided to run a little "experiment" regarding the (not so) "random" antennas, for such a purpose I created a model in 4NEC2 describing a somewhat typical "portable random" se...