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by daveB
25 Apr 2018 21:26
Forum: Medium Wave & Long Wave
Topic: What are some "easy" MW DX stations to look out for?
Replies: 3
Views: 40

What are some "easy" MW DX stations to look out for?

Now that I've got the Shielded loop in some sort of working order I'd like to try it out in earnest in the next few days (before the FM SpE season starts). So what is likely to be about during the late afternoons and into the evenings? And is Transatlantic DX still possible this time of year? A bit ...
by daveB
25 Apr 2018 13:14
Forum: Propagation
Topic: Lyrids Meteor Shower - or not
Replies: 0
Views: 17

Lyrids Meteor Shower - or not

This is supposed to be a Class 1 meteor shower - 20 meteors per hour - peaking in the 3rd week of April. As is usual I set up recording for a couple of nights before the peak and the night after. I might as well not have bothered Of the very few that registered none were anywhere near strong enough ...
by daveB
25 Apr 2018 12:57
Forum: Propagation
Topic: Solar Cycle 25
Replies: 18
Views: 687

Re: Solar Cycle 25

Some years ago, a science programme on BBC R4 mentioned the possibilities of a distant sun causing geomagnetic disturbances on earth. I recommend "Twilight of Briarius" by Richard Cowper, published ages go, that explorers this very theme. It' sci-fi with romnce combination but one of my favourites ...
by daveB
23 Apr 2018 21:42
Forum: Antennas
Topic: Wideband shielded loop antenna project
Replies: 1
Views: 71

RE:Wideband shielded loop antenna project - Part 2

Plodding on I've now made the mounting plate so that it can be clamped to a pole. It is temporarily lashed up with the bottom of the loop about 6 ft off the ground and a reasonable distance from the 2" mast for the FM band. I found another article which was useful - especially for the balun instruct...
by daveB
21 Apr 2018 08:57
Forum: DX Alerts
Topic: DAB DX about
Replies: 1
Views: 57

DAB DX about

From 07:30 - 08:55
8A Randstad Main 8 Sub 2 and 8/4
9D Zuidwest NL Maind 10 Sub 2
10A NDR NDS info - data only
10B Norfolk
10C strong - unresolvable
10D herts Beds Bucks

And strong localDX on FM
by daveB
19 Apr 2018 20:22
Forum: Antennas
Topic: Wideband shielded loop antenna project
Replies: 1
Views: 71

Wideband shielded loop antenna project

I've been working on a wide-band shielded loop antenna based on a design by PA3GZK. https://pa0fri.home.xs4all.nl/Ant/Active%20antenna/Active%20receiving%20%20loop%20antenna%20eng.htm I've used 10 mm soft drawn tube for the shield and multi-strand insulated copper speaker cable. The beta version is ...
by daveB
16 Apr 2018 19:51
Forum: DX Alerts
Topic: DX-maps - a prediction
Replies: 6
Views: 150

DX-maps - a prediction

I predict that DX-maps is going to become next to useless for sporadic E openings. I hope I'm wrong but I make this prediction because of the sudden popularity of a new weak signal mode FT8. This allows "QSOs" (if you call an exchange of call-sign, report and locator square by two computers, a QSO) ...
by daveB
14 Apr 2018 22:42
Forum: Television
Topic: TV-DXing with SDR# - a "doh" moment
Replies: 15
Views: 283

Re: TV-DXing with SDR# - a "doh" moment

Although it took me ages before I realised how to break that internal UHF 625 / VHF 405 link Sounds like a Bush TV161 to me - oh happy days! I actually re-tuned the audio IF to give AM sound on French UHF TV (System L). And I can remember getting two pictures side-by side on VHF from the 819 line F...
by daveB
14 Apr 2018 18:52
Forum: VHF Band 2, OIRT & DAB
Topic: Downloading FMList Lists
Replies: 3
Views: 82

Re: Downloading FMList Lists

Thanks Patrick, It turns out I had two problems with CSVUserList 1) it was v 3.95 and 2) when I clicked on the update button it told me I had the up to date version. Via the other forum I learned the current version is 4.14 so I updated. It downloads from FMList, but since I last did that the parame...
by daveB
13 Apr 2018 18:56
Forum: SDR Receivers
Topic: Lime Mini FM test
Replies: 6
Views: 154

Re: Lime Mini FM test

Hi Peter, Regarding filters in the Airspys - they state that they have "tracking RF filters" - which I take to mean a tuneable bandpass filter which tracks the centre frequency. In comparison the SDRPlay RSP (not the RSP1A) has basic wideband filters, e.g. 60-120 MHz, that don't have a lot of attenu...
by daveB
13 Apr 2018 18:09
Forum: VHF Band 2, OIRT & DAB
Topic: Downloading FMList Lists
Replies: 3
Views: 82

Downloading FMList Lists

Back in 2015 I posted how you could get raw data out of FMList using CSVUserListBrowser. This enabled me to have a huge spreadsheet that contained all the transmitters in all the countries in Europe, Africa and the Middle East. From that I could filter on PI Code or RDS PS name and even use wild car...
by daveB
13 Apr 2018 13:19
Forum: DX Alerts
Topic: Tuesday 17th April looks good on Hepburn
Replies: 59
Views: 787

Re: Tuesday 17th April looks good on Hepburn

I wait with bated breath - let's hope the forecast doesn't change for the worse.
by daveB
12 Apr 2018 11:45
Forum: Television
Topic: TV-DXing with SDR# - a "doh" moment
Replies: 15
Views: 283

Re: TV-DXing with SDR# - a "doh" moment

I started dabbling in TV-DX in the early 80s by just re-tuning my parents TV during tropos. Strangely enough - that is what got me hooked. I read the DX-TV column in a copy of Practical Television and decided to tune around on UHF where I found a very weak signal with sub-titles which meant it had ...
by daveB
12 Apr 2018 11:07
Forum: SDR Receivers
Topic: Lime Mini FM test
Replies: 6
Views: 154

Re: Lime Mini FM test

Thanks for finding and posting the video Peter. A couple of things I glean from the video - apart from the obvious that it is running on SDR-console v3. 1) It's playing back a recorded file and it looks like the max individual file length you can get on SDR-console v3 is about 25 seconds (look at th...
by daveB
11 Apr 2018 21:13
Forum: Receivers
Topic: Hack rf, anyone tried it yet?
Replies: 1
Views: 131

Re: Hack rf, anyone tried it yet?

8 bit ADC resolution would mean it has a similar dynamic range to an RTL dongle. Which can be adequate for general purposes - but at £229.50 you have better choices. For receive only either Airspy mini - whilst you can get them (£119.50 from Moonraker) if you don't want HF or SDR RSP1a (under £100)....
by daveB
11 Apr 2018 11:54
Forum: Television
Topic: TV-DXing with SDR# - a "doh" moment
Replies: 15
Views: 283

Re: TV-DXing with SDR# - a "doh" moment

David - You are going to have to change your 'handle' to "txdxrooled" then :D Seriously though I've just got a dipole that is oriented E-W and feeds a separate rtl-dongle. So in theory I could leave it running all the time with the pop up window showing. I use MSuite and Scheduler to change channels...
by daveB
10 Apr 2018 22:16
Forum: Television
Topic: TV-DXing with SDR# - a "doh" moment
Replies: 15
Views: 283

Re: TV-DXing with SDR# - a "doh" moment

Hi Chris, My TV-DX days go all the way back to 1969 when I was a teenager. I was very active until the mid-1970's then dabbled a bit from time to time over the decades. As the TV Sharp plug-in was there I decided to give it a go back in 2015 using the 70 MHz dipole I had put up to the OIRT band and ...
by daveB
09 Apr 2018 23:35
Forum: Television
Topic: TV-DXing with SDR# - a "doh" moment
Replies: 15
Views: 283

TV-DXing with SDR# - a "doh" moment

I've been using SDR# with the SharpTV plug in from rtl-sdr.ru for the last three seasons. Catches include Jordan on E3 as well as lots of closer stuff. I've always wished that the pop-up picture window could be larger. I was playing back some recordings from June 2017 from Ch R4 and just by accident...
by daveB
09 Apr 2018 19:06
Forum: VHF Band 2, OIRT & DAB
Topic: Updated SDRSharp WavPlayer
Replies: 1
Views: 99

Re: Updated SDRSharp WavPlayer

Yes - it is a nice addition. I'm currently running build 1655 with my Airspy mini and the MPXOutput plug in works, along with FMSuite, and of course RDSDataLogger - using the latest versions.

When I get a decent bit of meteor scatter I will utilise the feature to drag out marginal RDS signals.
by daveB
09 Apr 2018 17:19
Forum: SDR Receivers
Topic: AirSpy HF+ pre-orders open!
Replies: 4
Views: 92

Re: AirSpy HF+ pre-orders open!

Airspy HF+ will only give 660 kHz bandwidth - definitely not enough for DAB. So it would have to be the Airspy R2. Unfortunately they will not be making them any more as the R820T2 chips of the right quality are no longer available. So do not think for too long. You can record 10 MHz bandwidth - whi...

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