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by daveB
07 Jan 2019 17:55
Forum: Television
Topic: Analogue TV-DX logs from 1990/91
Replies: 3
Views: 208

Re: Analogue TV-DX logs from 1990/91

Thanks for the info Andy - FMList puts it as exactly 1200 km. RMF FM on 93.3 comes from that site.That is the furthest tropo distance I've had on Analogue TV. The best FM tropo distance was also 1200 km - from Sweden (SR P4 Kisa) in October 2015 and in 2017 tropo from Poland (Lebork) on FM at 1173 k...
by daveB
04 Jan 2019 09:57
Forum: News
Topic: Quadrantids 2019
Replies: 13
Views: 422

Re: Quadrantids 2019

I think you will run into issues. SDR apps write a lot of data to the disk and there will be enormous contention between the two apps. No doubt memory buffering will come into play - how much memory do you have? Can't each SDR record to a different disk? Stuart Taking the 2nd point first. That's ho...
by daveB
02 Jan 2019 21:42
Forum: Television
Topic: Analogue TV-DX logs from 1990/91
Replies: 3
Views: 208

Analogue TV-DX logs from 1990/91

I just found an old diary from the time I had a 4-bay Triax BB aerial, along with fixed loft mounted aerials for Band I and Band III. Of particular interest to me is a note for 3rd Sept 1991: "POLAND Ch 36. TELEWIZJA NOCA programma 2 as positive id". Would anyone have a record of what transmitter si...
by daveB
02 Jan 2019 12:56
Forum: News
Topic: Quadrantids 2019
Replies: 13
Views: 422

Re: Quadrantids 2019

Hopefully this meteor shower will give some results. It is circumpolar - and if I interpret the star charts correctly it is highest in the sky - almost overhead at around 6 am.
by daveB
28 Dec 2018 18:26
Forum: Off Channel
Topic: Bread-board circuit construction any one?
Replies: 8
Views: 710

Re: Bread-board circuit construction any one?

I've come across a "construction" article for a superhet receiver in the Oct 1923 issue of "Experimental Wireless" https://www.americanradiohistory.com/Archive-Experimental%20Wireless/20s/Experimental%20Wireless-1923-10.pdf There is also an article offering an explanation for the fading of signals a...
by daveB
27 Dec 2018 18:12
Forum: DX Alerts
Topic: Tropo on Christmas day?
Replies: 87
Views: 2150

Re: Tropo on Christmas day?

On the vertical aerial the waterfall on the SDR display is starting to look like SpE soup, making it difficult to resolve RDS.
by daveB
27 Dec 2018 18:06
Forum: Off Channel
Topic: How many (p)teradacytyls does What's Up use?
Replies: 0
Views: 89

How many (p)teradacytyls does What's Up use?

I had to share the above question - which my wife asked me today - worried about whether it would use up to much data. [She only has 500 mB data allowance on the monthly sim card].] OK it's my fault she calls it What's Up - as that's what I christened it - along with their rivals Faceache and Instag...
by daveB
27 Dec 2018 16:54
Forum: DAB
Topic: DAB tropo lift
Replies: 0
Views: 96

DAB tropo lift

DAB reception is developing very rapidly as night falls. Belgium, Holland, France and now Germany on 10A. I'm using QT-DAB - the sdrplay version and QIRX with airspy - not so good as the bandwidth is too wide. The aerial is a cobbled together 4 element yagi at about 4 m / 13 ft pointing out to the e...
by daveB
25 Dec 2018 16:46
Forum: Off Channel
Topic: Bread-board circuit construction any one?
Replies: 8
Views: 710

Re: Bread-board circuit construction any one?

I've just found a five minute youtube video which shows this book page by page. https://www.youtube.com/watch?v=t4h2GmlgpxQ Enjoy! Even better - it is here in pdf format: https://www.americanradiohistory.com/Archive-Bookshelf/Technology/Making-a-Transistor-Radio-Ladybird%20Books-1972.pdf This is a g...
by daveB
24 Dec 2018 10:18
Forum: Antennas
Topic: Korner 9.2 from Antennenland - in stock
Replies: 11
Views: 3191

Re: Korner 9.2 from Antennenland - in stock

That looks very interesting - it looks like they will be making them to order - as they can produce one or two per day.
by daveB
23 Dec 2018 20:35
Forum: VHF Band 2, OIRT & DAB
Topic: What happened to the Geminids and Ursids??
Replies: 5
Views: 215

Re: What happened to the Geminids and Ursids??

I will give the Quadrantids a go come January 4th, if I remember.
I'll just record the bottom of band for a few hours - enough to get a feel for the conditions - provided the unspeakable i-Trip isn't wiping out 87.5 - 93.0 MHz!
by daveB
23 Dec 2018 19:07
Forum: VHF Band 2, OIRT & DAB
Topic: What happened to the Geminids and Ursids??
Replies: 5
Views: 215

What happened to the Geminids and Ursids??

Has everyone else suffered from an almost complete lack of meteor reception in December? Going over the European logs on FMList 2014/15/16 there were plenty of reports - into the hundreds for the Geminids. This year I got just the very occasional ping barely above the noise and judging by the lack o...
by daveB
16 Dec 2018 22:52
Forum: VHF Band 2, OIRT & DAB
Topic: Notch filter for 92.3 MHz?
Replies: 4
Views: 404

Re: Notch filter for 92.3 MHz?

That is a good possibility - but with a double notch filter you can slightly broaden the width of the null to remove the whole channel.
by daveB
13 Dec 2018 20:44
Forum: VHF Band 2, OIRT & DAB
Topic: Notch filter for 92.3 MHz?
Replies: 4
Views: 404

Re: Notch filter for 92.3 MHz?

If you are going to build an expensive aerial system it might be better to purchase a filter. It would cost less than making one, especially if you consider the time involved.Check out the web-site www.tinlee.com. This filter looks to be what you need http://www.tinlee.com/PDF/VR7-instu-page-LC-7-14...
by daveB
10 Dec 2018 22:57
Forum: Off Channel
Topic: Bread-board circuit construction any one?
Replies: 8
Views: 710

Re: Bread-board circuit construction any one?

Yes - they were available. I don't think the one I had was from Tandy back in the 70's.
by daveB
10 Dec 2018 15:30
Forum: Off Channel
Topic: Bread-board circuit construction any one?
Replies: 8
Views: 710

Bread-board circuit construction any one?

I was amused - a whole new meaning to using a bread board for circuit construction. [Note for the young - in the early days of wireless circuits were literally built onto a wooden board with all the components screwed down to the board and joined by wires. Hence "bread board" as the kitchen was the ...
by daveB
07 Dec 2018 13:34
Forum: Television
Topic: RUS Analogue TV Shutdown Started
Replies: 5
Views: 414

Re: RUS Analogue TV Shutdown Started

So is there any indication of how long will FM broadcasts last on the OIRT band???
by daveB
26 Nov 2018 20:54
Forum: Off Channel
Topic: General Purpose PC in sale
Replies: 0
Views: 138

General Purpose PC in sale

I found the following PC on offer from Currys/PCWorld for £419.00 sale price Acer XC-885 Intel i5-8400. 8GB RAM/1TB hard drive - with wireless keyboard and mouse. It has a 220W PSU. The cpubenchmark for the cpu is 11671. Just on 4 years ago I bought a Packard Bell with similar specs- but with an 15-...
by daveB
14 Nov 2018 15:32
Forum: DX Alerts
Topic: Possible tropo over the weekend
Replies: 10
Views: 436

Re: Possible tropo over the weekend

Getting Luxembourg with RDS and Lille at 0% ber RDS. It looks promising for the next few days so I have turned on the 24/7 monitoring set up.

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