Search found 162 matches

by g1hbe
Thu May 25, 2017 6:19 pm
Forum: SDR Antennas
Topic: Great experience with PAR Electronics EF-SWL
Replies: 5
Views: 1000

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: 152

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: 206

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: 236

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: 206

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: 436

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: 243

Re: SDRuno verison

Just click on the OPT button in the small 'main' window and select 'About'. It'll tell you the version there.
by g1hbe
Thu May 04, 2017 11:16 pm
Forum: New Users' experiences
Topic: Looking pretty good here
Replies: 2
Views: 226

Re: Looking pretty good here

The hardware and Uno software are indeed very good, but like all SDR's that boast a wide spectrum display, they will show images and other spurii. Narrow front-end filtering will get rid of the unwanted responses, but of course this will stop you using the much-trumpeted 10 MHz b/w. I find the SDR2 ...
by g1hbe
Wed May 03, 2017 8:23 am
Forum: SDR Antennas
Topic: Random wire questions
Replies: 8
Views: 779

Re: Random wire questions

Yes, link N & G and take the coax outer to it. To minimise noise, try earthing the far end of the coax outer or the receiver end, or both. Noise can enter your system via several ways and there seems to be no hard and fast rule in practice. If your coax is more than about 10m, then a pair of 9:1...
by g1hbe
Tue May 02, 2017 8:18 am
Forum: SDR Antennas
Topic: Random wire questions
Replies: 8
Views: 779

Re: Random wire questions

Hi d. That random wire is perfectly good, but you may find it picks up lots of noise from your house and those of your neighbours. It's not a good idea to bring a receiving antenna directly into your home for this reason. Much better to use a length of co-ax from the Hiz port to a point in the garde...

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