Search found 34 matches

by VE3EAR
Tue Jul 14, 2020 1:04 am
Forum: Antennas
Topic: Airspy YouLoop
Replies: 13
Views: 1702

Re: Airspy YouLoop

I think I'll throw in the towel on the YouLoop! 73, Bruce, VE3EAR I couldn't let it rest, so once again down to the workshop to try something different yet again. Since I didn't have an extra binocular core laying around, I had to make one. An old monitor cable had two cylinder-style cores on it fo...
by VE3EAR
Wed Jul 01, 2020 1:37 pm
Forum: Antennas
Topic: Airspy YouLoop
Replies: 13
Views: 1702

Re: Airspy YouLoop

The loop I made myself is at lawn-level, so despite being big it is not 'up there' where it would probably be receiving much better. From what I've read and seen on numerous YouTube videos, the height above ground isn't all that important. If you can get it up about two loop diameters above ground,...
by VE3EAR
Mon Jun 29, 2020 3:34 am
Forum: Antennas
Topic: Airspy YouLoop
Replies: 13
Views: 1702

Re: Airspy YouLoop

I tried another feed method for the DIY YouLoop today. Went with a centre-tapped 8 turn winding on the antenna side, and 16 turns on the radio side. The centre-tap connected to the shields of the loop at the feed point. Again, it worked, but it still wasn't anything to get excited over. Time to try ...
by VE3EAR
Sun Jun 21, 2020 4:35 pm
Forum: Antennas
Topic: Airspy YouLoop
Replies: 13
Views: 1702

Re: Airspy YouLoop

Perhaps the RF "sees" a different path I couldn't get your observation off my mind yesterday, and I pondered what to try to resolve this issue. Since my area of interest is receiving the AM broadcast band, along with the amateur 80M and 40M bands, it seemed to me that I would need more turns than t...
by VE3EAR
Sat Jun 20, 2020 1:21 pm
Forum: Antennas
Topic: Airspy YouLoop
Replies: 13
Views: 1702

Re: Airspy YouLoop

So what is the benefit of the Youloop's apparent twin-loop design? That's a very good question. You're correct in thinking that the shortest path, as far as DC is concerned, only has one turn in the loop proper. Perhaps the RF "sees" a different path, and takes advantage of both turns, is the only ...
by VE3EAR
Fri Jun 12, 2020 11:41 pm
Forum: Antennas
Topic: Airspy YouLoop
Replies: 13
Views: 1702

Re: Airspy YouLoop

I built my own YouLoop, but went with a different feed arrangement. Instead of using the binocular core transformer
to couple the antenna to the feed line, I opted for a current (aka choke) balun instead. It works much better.

Bruce, VE3EAR
by VE3EAR
Thu Apr 30, 2020 1:20 pm
Forum: RTL-SDR Discussion
Topic: "SDR Receiver" for Mac (& iPhone, iPad)
Replies: 2
Views: 1395

Re: "SDR Receiver" for Mac (& iPhone, iPad)

Here is another solution for you, and it's free! I'm using Gqrx in my iMac under El Capitan OS. Here is the link: https://stealingthe.network/installing-the-latest-version-of-gqrx-on-macos-el-capitan/ It works great with my Airspy HF+ Discovery. A bit of a learning curve, but there are good online d...
by VE3EAR
Sun Apr 26, 2020 1:32 pm
Forum: Antennas
Topic: Low Frequency Antenna
Replies: 14
Views: 15324

Re: Low Frequency Antenna

A multi-turn loop antenna is likely your best bet for receiving LF and VLF frequencies.
A square one of at least 1 metre in size, would be a good starting point. There are
lots of loop building plans on web sites you can check out.

73, Bruce, VE3EAR
by VE3EAR
Fri Apr 17, 2020 3:08 pm
Forum: Antennas
Topic: Disappointment with my new 2M antenna
Replies: 2
Views: 1152

Re: Disappointment with my new 2M antenna

What type of coax are you using for the feed line to the new antenna?

73, Bruce, VE3EAR
by VE3EAR
Tue Mar 10, 2020 2:45 pm
Forum: Antennas
Topic: DIY QFH for NOAA, pvc and copper tube plans, but smaller diameter copper?
Replies: 2
Views: 4691

Re: DIY QFH for NOAA, pvc and copper tube plans, but smaller diameter copper?

But the diameter of the elements shouldn't matter much if the lengths and angles are preserved, right? That's right....the thicker elements may have a slightly wider bandwidth, but with the design of the QFH being what it is, the bandwidth is already taken care of by the two loops being of differen...