Search found 12 matches

by Egil - LA2PJ
Wed Mar 13, 2024 12:32 pm
Forum: General Discussion
Topic: Another directional RX loop
Replies: 7
Views: 649

Re: Another directional RX loop

Thats a great idea!
Thanks for sharing. This version should be much easier to build for beginners than the SULA.
And a suitable balun and preamp can be found at very low cost on the web.

73
Egil - LA2PJ
by Egil - LA2PJ
Sun Jan 28, 2024 9:31 pm
Forum: Questions & Advice
Topic: Balcony antenna
Replies: 11
Views: 14109

Re: Balcony antenna

Forty years ago I lived for a year in a small flat on the third floor of a house with restrictions on antennas etc. So I made a similar loop antenna using 3mm copper wire. The circumference was about 9 meters, and I used a resistor of 1 kOhm. Antenna could not be seen from the ground unless you knew...
by Egil - LA2PJ
Mon Sep 04, 2023 5:05 pm
Forum: Questions & Advice
Topic: Balun One Nine: cutting R1
Replies: 14
Views: 12114

Re: Balun One Nine: cutting R1

Just scrape it off whith a knife... Carefully!

Good luck!


73's
Egil - LA2PJ
by Egil - LA2PJ
Mon Sep 04, 2023 9:44 am
Forum: Questions & Advice
Topic: Balun One Nine: cutting R1
Replies: 14
Views: 12114

Re: Balun One Nine: cutting R1

It is done to obtain galvanic isolation between the antenna and radio.

See here: https://swling.com/blog/2019/10/the-noo ... lun-19-v2/


73's
Egil - LA2PJ
by Egil - LA2PJ
Sat May 27, 2023 10:28 pm
Forum: General Discussion
Topic: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z
Replies: 11
Views: 9979

Re: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z

I just had an eye opening experience. When I commented on 13dka ' recording, I was sitting in a hotel room in Trondheim using my laptop. Think I have to purchase some kind of bluetooth earbuds to get proper audio quality. WhenI listened to his recording again, after returning home tonight, I immedia...
by Egil - LA2PJ
Sat May 27, 2023 4:43 pm
Forum: General Discussion
Topic: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z
Replies: 11
Views: 9979

Re: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z

I do no recognise the languageof the announser, but the music in the background is the interval signal of Vatican Radio. I have no idea how this could happen though, so you have probably recorded a once in a lifetime happening.
by Egil - LA2PJ
Tue May 23, 2023 8:17 am
Forum: Questions & Advice
Topic: Balun for a end fed random wire?
Replies: 5
Views: 5802

Re: Balun for a end fed random wire?

Paul, When I moved to my present home I had excactly the same problems. After a lot of trial and error whithout any improvements in the noise situation, one of the oldtimers recommended a "Common Mode Choke". He even built it for me. That got rid of almost all the noise, and still works fi...
by Egil - LA2PJ
Mon Apr 17, 2023 8:41 am
Forum: General Discussion
Topic: Matching transformer for random wire?
Replies: 7
Views: 6128

Re: Matching transformer for random wire?

Some years ago I had exactly the same problem as you. A friend adviced me to build a simple antenna tuner, and a quick search on the internet resulted in a link to a building instruction for an antenna tuner in PDF format by someone calling himself Editor Bob. Since then I have built two more of the...
by Egil - LA2PJ
Sun Apr 09, 2023 10:23 am
Forum: General Discussion
Topic: Improving the MLA-30
Replies: 2
Views: 4798

Re: Improving the MLA-30

Never used a MLA-30 myself, but today I more or less stumbled over this discussion where they also have published schematics for both loop amplifier and bias-T:

https://www.eevblog.com/forum/rf-microw ... p-antenna/


Good luck!
by Egil - LA2PJ
Fri Apr 07, 2023 6:06 pm
Forum: General Discussion
Topic: Need some advice.
Replies: 2
Views: 4878

Re: Need some advice.

If you were happy with the PL-880, the 990 (or a 2nd-hand 880) might be a reasonable replacement. The S-8800 is the only of the two I own and I found it a particularly quirky radio, it's also quite big for traveling with it. Thanks for posting your opinion on the S-8800. A few days ago I visited a ...