Search found 5 matches

by Arlo
Mon Mar 16, 2020 2:10 am
Forum: Other SDR Devices
Topic: Other SDR Radio Support
Replies: 0
Views: 226

Other SDR Radio Support

I'm a new owner of an Icom IC-R8600 receiver and I have to say it is phenomenal. Not too bad to learn to use. Much nicer although smaller than the IC-R8500 that has been enjoyed for the years that I've owned it. I'd like to say I have a few RTL-SDR dongles and have purchased DSD+ Fastlane. There wil...
by Arlo
Thu Jan 30, 2020 6:29 am
Forum: Antennas
Topic: QFH for L-Band Construction/Design Help Please!
Replies: 1
Views: 1165

Re: QFH for L-Band Construction/Design Help Please!

Not pretty but a start. Went with a US Army publication on L Band QFH design. All 4 helices are soldered to the mast at the bottom. What a bear to do that! One short and long loop soldered to the mast at the top, other 2 are soldered to center conductor. Used 3/16" brass tubing. A crimp connector wi...
by Arlo
Thu Jan 30, 2020 5:47 am
Forum: Antennas
Topic: QFH Antenna
Replies: 3
Views: 1740

Re: QFH Antenna

Yes. 2 loops on the bottom. Using the short design QFH for NOAA 137 mHz sats. Able to grab nice signals all the way to 5 degrees H-H. Mine is made of 1/2" CATV hardline. Used my RSP2 with the internal LNA for a few years now. Just got a nooelec lana today with a pack of sma fittings. Cant wait to gr...
by Arlo
Mon Jan 27, 2020 1:18 am
Forum: RTL-SDR Discussion
Topic: Finding a Weather Balloon
Replies: 3
Views: 844

Re: Finding a Weather Balloon

I'm getting your intentions and it looks pretty cool. You could build a multi element yagi antenna cut for your APRS frequency. The more the elements, the more directional it would be. I've built several yagi's that work on 2 meters all the way up to wifi frequencies. Used a simple fiberglass pole f...
by Arlo
Sat Jan 25, 2020 11:13 pm
Forum: Antennas
Topic: QFH for L-Band Construction/Design Help Please!
Replies: 1
Views: 1165

QFH for L-Band Construction/Design Help Please!

Hi Guys. First time here, long time on rtl-sdr.com. Firstly I've had a 137mHz QFH working for around 5years now made of commercial 1/2" hardline. Nice performance. Looking at all of the designs for L-Band QFH antennas I'm a bit confused at the different construction schemes. I've tried to look at th...