Search found 329 matches

by g1hbe
Tue Feb 13, 2018 10:33 pm
Forum: General
Topic: Spike on 120.000 mHz
Replies: 3
Views: 1176

Re: Spike on 120.000 mHz

One of the RSP's converter oscillators runs at 120 MHz, so it may be that. Not sure about the RTL stick - probably something similar, maybe a clock oscillator harmonic.
by g1hbe
Fri Feb 09, 2018 12:06 pm
Forum: New Users' experiences
Topic: Bad Experience so far.
Replies: 7
Views: 1823

Re: Bad Experience so far.

Don't feel bad. My experience with the team has been nothing but positive, with questions answered within hours and bug reports acted upon quickly. It seems you have been extremely unlucky.
by g1hbe
Thu Feb 08, 2018 9:13 am
Forum: SDR Antennas
Topic: W6LVP active loop antenna
Replies: 2
Views: 3017

Re: W6LVP active loop antenna

Good luck with the new antenna. I've been using a Wellbrook 1530 for many years and it has literally saved my hobby. The noise on my wire antennas (and the mini-whips I have built) is horrendous, but the loop just ignores most of it and it has dropped from s8-9 to s1. And as it's on a rotator I can ...
by g1hbe
Fri Feb 02, 2018 7:07 pm
Forum: SDR Antennas
Topic: Bias-T powered filter and an Active Antenna on Port B
Replies: 2
Views: 1300

Re: Bias-T powered filter and an Active Antenna on Port B

There will only be a problem if the filter cannot pass DC through to your active antenna OR the filter has a DC path to earth, which would short the DC and possibly damage the bias T. Can I ask is the filter a MW rejector or a MW bandpass filter? And what band are you hoping to listen to? Cheers Andy.
by g1hbe
Thu Feb 01, 2018 7:55 pm
Forum: SDRuno
Topic: am i doing something wrong ? sdruno with SDRplay 1
Replies: 3
Views: 915

Re: am i doing something wrong ? sdruno with SDRplay 1

Andre I agree with Paul - those regularly-spaced 'rumbles' are probably just harmonics of a local interference source. Bear in mind that 20m is pretty poor after dark - I've just quickly looked and the band is almost empty. Try 40m (7MHz), you should hear activity there, especially above 7200 where ...
by g1hbe
Thu Feb 01, 2018 3:26 pm
Forum: SDRuno
Topic: PMR 446 Mhz
Replies: 4
Views: 1367

Re: PMR 446 Mhz

That's strange - I find my RSP2 very sensitive on 446 and I hear lots of activity. Those spikes don't look right though - does your USB lead have ferrites on both ends? Try re-arranging your leads to see if you can get rid of that noise. Reduce that 'gain reduction' setting as well, see if signals e...
by g1hbe
Sat Jan 27, 2018 12:01 am
Forum: SDRuno
Topic: frequency selection glitch in 1.22
Replies: 10
Views: 2557

Re: frequency selection glitch in 1.22

I've found that the step size on USB is set to 100KHz randomly. I'm not sure what causes it.
by g1hbe
Wed Jan 24, 2018 2:40 pm
Forum: General
Topic: MW Breakthrough
Replies: 12
Views: 3037

Re: MW Breakthrough

Wow Gazzman, I'd never heard of the Wellbrook 1010. It seems to be basically similar to the 1530 but optimised for lower frequencies. It probably performs like the 1530 as well, as I find my 1530 gets a bit wooden above 10 MHz and works best at low frequencies. I thought I lived in a challenging RF ...
by g1hbe
Wed Jan 24, 2018 10:42 am
Forum: General
Topic: MW Breakthrough
Replies: 12
Views: 3037

Re: MW Breakthrough

Great to see a positive outlook, Gazzman. Yes, the ferrite rod antennas in your portables are basically loops, so they do reject noise to a certain extent. but they are very small loops so as you say they don't pick up very weak sigs like a big loop does. Like Paul, I have built loops using plastic ...
by g1hbe
Tue Jan 23, 2018 10:57 pm
Forum: General
Topic: MW Breakthrough
Replies: 12
Views: 3037

Re: MW Breakthrough

Gazzman. Sounds like you have major local noise problems which can really complicate matters. I am in the same boat but much less severe. Trying any type of wire antenna (even well away from the house and fed with coax) just produces noise. The Wellbrook loop mounted at gutter height at the end of t...

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