Search found 483 matches

by g1hbe
Mon Aug 05, 2019 12:34 pm
Forum: SDR Antennas
Topic: Cheap L-BAND patch antenna (for inmarsat?)
Replies: 6
Views: 648

Re: Cheap L-BAND patch antenna (for inmarsat?)

I picked up a cheap active L-band patch antenna from an online seller and stuck it in place of the driven element of a homebew 1500 MHz yagi. Pic attached. Second pic is some of the stuff I received. The antenna was indoors and beaming through a brick wall, I'm sure it would have been a lot better o...
by g1hbe
Fri Aug 02, 2019 6:00 pm
Forum: General
Topic: Nearby strong AM broadcasting station
Replies: 10
Views: 1041

Re: Nearby strong AM broadcasting station

Hi Chris. If you are worried about harm to your RSP2 from 730 AM, I doubt the signal will come anywhere near strong enough to actually damage your front end, but you will almost certainly get some trouble with images of the station appearing within the NDB band. I live about 10 miles south of a big ...
by g1hbe
Tue Jul 23, 2019 2:50 pm
Forum: General
Topic: Low noise amp
Replies: 2
Views: 524

Re: Low noise amp

AFAIK, the RSP's alter the s-meter calibration as the gain is changed, so the reported signal strength is always shown no matter how you fiddle with the gain. Now if you could alter the gain of your pre-amp, you would see the signal strength change as the RSP is not aware of external amplification o...
by g1hbe
Tue Jul 23, 2019 9:39 am
Forum: SDR Antennas
Topic: DCF 77 77.5KHZ
Replies: 17
Views: 1810

Re: DCF 77 77.5KHZ

Generally speaking, if you have a low local noise level, wires and active mini-whips should work well. but if your noise level is high (like most of us these days), an active loop such as the Wellbrook 1530 will be the best. If you have the ability/skill to build an amplified loop you can save a lot...
by g1hbe
Mon Jul 22, 2019 11:06 am
Forum: New Users' experiences
Topic: sdrplay duo and uhf
Replies: 5
Views: 464

Re: sdrplay duo and uhf

That's disappointing, fiann. I often tune to around 255 MHz and listen to the South American pirates operating through the US Milcom satellites, and there's an old military satellite on 237 MHz that comes over every now and then. The reception of these on my RSP2 is just as good as it is on my other...
by g1hbe
Sun Jul 21, 2019 8:59 am
Forum: New Users' experiences
Topic: sdrplay duo and uhf
Replies: 5
Views: 464

Re: sdrplay duo and uhf

The RSP's can suffer from DAB images on parts of the UHF band. Have you tried enabling the DAB filter?
by g1hbe
Sun Jul 21, 2019 7:31 am
Forum: SDRuno
Topic: my problem with ..uno
Replies: 8
Views: 2376

Re: my problem with ..uno

It always used to be called the 'Post Detection Band Pass Filter', I can't recall when it changed. I leave it on all the time.
by g1hbe
Sat Jul 20, 2019 7:16 am
Forum: SDRuno
Topic: AM Broadcast Stations on 22 MHz
Replies: 17
Views: 1155

Re: AM Broadcast Stations on 22 MHz

That should work. I had problems on longwave with out of band HF and MW signals. I built a 3 pole elliptic LP filter in an Altoids can for the HiZ port that cuts everything above 520Khz. Works great, virtually no OOB stuff, it also lowered the noise levels somewhat on LW. Mike I did the same and th...
by g1hbe
Sun Jul 14, 2019 8:52 am
Forum: New Users' experiences
Topic: This thing doesn't work
Replies: 5
Views: 727

Re: This thing doesn't work

It's difficult to spot what he's doing wrong. In the early part of the section the RSP is in overload, but later on it's not. He must be doing something wrong, as I've just tried my RSP2 under similar conditions and signal strengths and signal is perfectly readable. I thought I'd spotted his mistake...
by g1hbe
Fri Jul 12, 2019 7:53 am
Forum: SDRuno
Topic: Tuning steps again.
Replies: 5
Views: 563

Re: Tuning steps again.

Apologies for mentioning it in the wrong place, but I've seen this matter mentioned so often on here and on the FB pages that I assumed it was already 'on the list'. I've just gone to my laptop and: 1. Opened up a single RX in SDRUno 2. Select WFM. Note step size is shown as 100 kHz. 3. Now select U...