Search found 10 matches

by rack201
Mon Mar 06, 2017 2:01 am
Forum: SDR Antennas
Topic: Active loop build - construction questions
Replies: 8
Views: 2494

Re: Active loop build - construction questions

I cheated and had them rolled at place nearby with a hydraulic pipe bender :) I now have it mounted up on the 2nd story roof and results are the same - seems to be overloading the SDRPlay everywhere. Would a simple external attenuator help if this is the case? Where would I insert it? If it needs to...
by rack201
Sun Mar 05, 2017 4:10 pm
Forum: SDR Antennas
Topic: Active loop build - construction questions
Replies: 8
Views: 2494

Re: Active loop build - construction questions

I received the LZ1AQ amplifier kit and I decided to update from the PE-Al-PE material to plain 1inch Al tubing (1.5mm wall size). I am running two 1m loops in the same plane, but results in the 40m band where I do most of my listening are not as good as my randomly cut center fed dipole. For power I...
by rack201
Sun Feb 12, 2017 4:21 pm
Forum: SDR Antennas
Topic: Active loop build - construction questions
Replies: 8
Views: 2494

Re: Active loop build - construction questions

Had a go this weekend making a single loop. I have not received the amplifier kit yet, but hooked it to the SDRPlay briefly and can certainly see some the sensitivity change when I rotate it by hand. Lower noise level is giving better digital mode decoding and HF fax reception. Two questions: I woul...
by rack201
Mon Feb 06, 2017 4:08 pm
Forum: SDR Antennas
Topic: Active loop build - construction questions
Replies: 8
Views: 2494

Active loop build - construction questions

I'm about to attempt to build an active loop antenna and have a couple of questions re the loop. I plan to use a 1m diameter loop - either aluminium tube if i can get it shaped, or the PE-Al-PE tubing used for hot water systems or a/c plumbing, and 1.5 or 2" PVC for the 'mast' which will run up...
by rack201
Mon Feb 06, 2017 3:55 pm
Forum: SDR Antennas
Topic: Beverage or Wellbrook Loop?
Replies: 8
Views: 2772

Re: Beverage or Wellbrook Loop?

Its a shame because I was very keen on a Wellbrook - more so than the Pixel based on what I was reading. My challenge is that I'm based in India so shipping is essentially a no go. I've decided I'll have a go at building my own and have ordered one of the LZ1AQ active antenna amplifier kits from act...
by rack201
Sun Feb 05, 2017 5:40 am
Forum: SDR Antennas
Topic: Beverage or Wellbrook Loop?
Replies: 8
Views: 2772

Re: Beverage or Wellbrook Loop?

Just as an aside, I wanted to buy a Wellbrook loop recently, and Andy Ikin indicated he/Wellbrook Communications didn't have the capacity to manufacture and he was moving towards retirement.. your mileage may vary..
by rack201
Mon Jan 16, 2017 2:44 pm
Forum: General
Topic: dump1090 - 2 vs. 8MHz and RSSI
Replies: 2
Views: 943

dump1090 - 2 vs. 8MHz and RSSI

Hi All, Been building some antennas and playing with my RSP2 and dump1090 to plot aircraft using VRS. Am able to decode signals from aircraft >350km away so all seems to be working well. Can someone explain to me (novice) how to understand the difference between running dump1090 in 2MHz vs 8MHz mode...
by rack201
Wed Dec 28, 2016 11:09 pm
Forum: SDR Antennas
Topic: Balun needed for coax fed dipole on hi-z port?
Replies: 3
Views: 1973

Balun needed for coax fed dipole on hi-z port?

Hi - I'm very much a beginner here, and plan to build an inverted-v dipole for use with my SDRplan RSP2. I understand the hi-Z port has an impedence of 1k Ohms. Does this mean I would not require a balun if using a relatively short (say 10-20 meters?) coax feedline to the dipole? Alternatively if I ...
by rack201
Wed Dec 28, 2016 10:53 pm
Forum: New Users' experiences
Topic: Can't go above 1.5Mhz bandwidth or choppy audio
Replies: 4
Views: 1424

Re: Initial impressions - great!

Thanks for the reply. It seems to be related to the level of zoom I have set on the spectrum windows. If I have multiple VRXs running (2-3) and zoom any of them in to the maximum, the audio drops occurs. Anything lower than full zoom and I can run a higher sample rate no problem. I am wrapped with t...
by rack201
Mon Dec 26, 2016 12:58 am
Forum: New Users' experiences
Topic: Can't go above 1.5Mhz bandwidth or choppy audio
Replies: 4
Views: 1424

Can't go above 1.5Mhz bandwidth or choppy audio

Hi All, New to the SDRplay and have just received an RSP2. I'm running SDRuno under Windows 8.1 on a 64bit laptop, core i-5 with 8gig of RAM, 2 cores. In SDRuno, if I set SR (Mhz) to anything above 2Mhz which gives me an IF BW of 1.536Mhz I get chopped up audio. The Sys utlization reported in SDRuno...

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