Search found 215 matches

by g1hbe
Fri May 26, 2017 3:50 pm
Forum: SDRuno
Topic: Channel Skew Adjustment Procedure
Replies: 4
Views: 726

Re: Channel Skew Adjustment Procedure

I've found the best way to adjust I/Q balance is to tune in a very strong signal and position it on one side of the waterfall display. Look in the same position on the other side of the display for a mirror image. If you can't see one, then you probably don't need to adjust anything! If you do see o...
by g1hbe
Fri May 26, 2017 2:50 pm
Forum: General
Topic: Sdr-console V3 Preview is out
Replies: 12
Views: 5630

Re: Sdr-console V3 Preview is out

Please forgive me if I'm misunderstanding you, but why would you want to place a frequency (the one you want to listen to presumably?) at centre? With the SRP units (and any other 'zero IF' SDR) that's where the central DC spike is and should be avoided.
by g1hbe
Fri May 26, 2017 10:55 am
Forum: SDR Antennas
Topic: Great experience with PAR Electronics EF-SWL
Replies: 22
Views: 4377

Re: Great experience with PAR Electronics EF-SWL

That's very interesting, Heinrich. My experience is just the opposite! On wire antennas and 'mini-whip' types I get terrible noise, especially at MF and LF, but the loop is much quieter and allows signals to be heard. As you say, it depends on what types of QRM you suffer from and how close it origi...
by g1hbe
Thu May 25, 2017 6:19 pm
Forum: SDR Antennas
Topic: Great experience with PAR Electronics EF-SWL
Replies: 22
Views: 4377

Re: Great experience with PAR Electronics EF-SWL

Hi Captain. Wire antennas are cheap and you can design or tune them across wide ranges, but I'd question their use with the high noise levels we have these days. I've been using a Wellbrook loop for the last 16 years or so and it's worth its weight in gold. Banishes noise almost completely, especial...
by g1hbe
Mon May 22, 2017 1:48 pm
Forum: General
Topic: Receiver desensitized
Replies: 2
Views: 796

Re: Receiver desensitized

It's inevitable really. The AGC has to keep everything within the passband below the clipping level of the ADC or there will be severe distortion, intermod etc. So if there's a very strong signal anywhere in the selected bandwidth, the gain will reduce to accomodate it. As well as reducing the bandw...
by g1hbe
Fri May 19, 2017 11:10 am
Forum: SDRuno
Topic: How to Enter 1090mhz
Replies: 3
Views: 964

Re: How to Enter 1090mhz

That's correct. You should be tuned to 1090 MHz.

For 146.910 MHz, enter 146910 without any decimal points.

It is quite confusing, as you enter in KHz but the software puts in decimal points and makes you think you've done it wrong. Please people at SDR Play, give us MHz/KHz keys!
Good luck!
by g1hbe
Thu May 18, 2017 10:53 pm
Forum: SDR Antennas
Topic: Antenna ports
Replies: 4
Views: 1028

Re: Antenna ports

I suppose antenna B input is intended for VHF and above, where masthead pre-amps are more frequently used to overcome coax losses. Most of us would not use an antenna amp on HF.
by g1hbe
Thu May 18, 2017 5:05 pm
Forum: SDRuno
Topic: How to Enter 1090mhz
Replies: 3
Views: 964

Re: How to Enter 1090mhz

Just remember that SDRUno uses KHz entry, so add three zeros on the end. I wish they'd make it MHz or KHz, and give us a key for each. My Signal Hound analyser does this - I just type 105 k or 220 m and it takes me there.
by g1hbe
Fri May 12, 2017 11:05 pm
Forum: General
Topic: Original SDRPlay
Replies: 6
Views: 1356

Re: Original SDRPlay

I have one of the old blue & white ones and IIRC the case just cracks apart with a bit of persuasion.
by g1hbe
Tue May 09, 2017 6:17 pm
Forum: SDRuno
Topic: SDRuno verison
Replies: 2
Views: 873

Re: SDRuno verison

Just click on the OPT button in the small 'main' window and select 'About'. It'll tell you the version there.

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