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Atmospherics (merged) (Part 3)
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Nick_G
20-02-2013
Originally Posted by ACL777:
“Is it better than an unmodified st sb920 for selectivity and sensitivity and does the rds stay after the signal has gone. I've noticed with my Sony that the rds disappears immediately after the signal goes. Does it have 2 aerial ports and display PI codes. Sorry probably too many questions there.”

Yes it would be better than an unmodified SB920 for sensitivity & selectivity. It has 3 IF bandwidths, Wide, Narrow and Super Narrow. The latter has 4x150 kHz filters in line and is completely separate from the Wide and Narrow IF strip.

It does not have RDS. It depends what is more important, better DX performance or RDS.

There is only 1 FM aerial socket.

Hope this helps.
ACL777
20-02-2013
Thanks for the info. I guess if the Denon can pull in more Dx than the 920 then the answers obvious. I suppose I would have to rely on FM list for IDs.
Nick_G
27-02-2013
Lille is nicely up, as is the London area seemingly with London pirate Logic FM audible on 104.3. Lots of loud MCing over drum & bass beats.

A little earlier WDR 4 was in with a weak signal on 100.5 from Teutoburger Wald near Bielefeld.
Nick_G
28-02-2013
Mostly short-range stuff here this morning. One log of interest was Brocken on 101.4 at about 7.30 am and traces of Teutoburger on 100.5. Still hasn't got going properly yet though.
Hybrid tellies
28-02-2013
Slight enhancement here with R2 Rowridge on 88.50 blasting in with R Devon 103.40 from North Hessary Tor and Heart 106.20 from Croydon heard clearly in mono.
Nick_G
01-03-2013
Brocken noise-free on 101.4 :
Brightonelectri
01-03-2013
Have been listening to Democracy Now and NPR All Things considered on 846khz. The announcement stated programmes are via WRN. My list of stations lists 846khz as a transmitter near Moscow but signal so strong I wonder if it is nearer to the UK? There once was an italian station on this channel.
Gary Brenton
02-03-2013
Originally Posted by DDaveBB:
“I've just fitted narrow filters to my recently purchased Sony ST-S311 and also taken off the clock and data signals from the smd RDS Chip to feed RDSSpy via the audio input of a PC soundcard.

I've compared the two receivers below - full service manuals for both can be downloaded from electrotanya.com - which shows in many respects the circuitry is identical or only slightly tweaked.

SB920 - conventional components throughout
ST-S311 - surface mounted capacitors and resistors except for electrolytics and fusible resistors.

SB920 - two aerial inputs
ST-S311 - one aerial input (UK model), two aerial inputs (EU model)

SB920 tuner - big
ST-S311 - tiny and inaccessible but as far as I can tell - apart from the coils it's all surface mounted components. BTW the silver fixing bolt holding the aerial panel to the chassis is soldered to the tuner can - and needs to be unsoldered in order to remove the board for modification - and re-soldered after. I presume it to provide better grounding.

SB920 - no easy access to bandwidth or attenuator and most of the other selection buttons are small and behind a drop down flap
ST-S311 - everything is on the front panel and much easier to access.

SB-920 - the front display panel has a metal shield
S311 - doesn't have a shield.

The IF layout on the S311 is much better in my opinion as all four filters are in a straight line - unlike the SB920 - so might be less likely to suffer leakage(?)

I also spent a little bit of time swopping out ceramic filters.2x150 + 1x110 and 2x150 + 2X110 showed no discernable difference in RDSSpy responsiveness - but going to 1x150+3x110 made it appreciably slower on a marginal station.

So at the moment it's running with 2x150 and 2x110.

Sensitivity? I don't know if I can tell the difference. I've no measuring equipment other than the lump between the ears and I'm also comparing with an SB920 fitted with 3x180 and 1x110. And external noise is the limiting factor anyway. As RDSpy response time is the same I'll be putting the same filter line up that I have in the ST-S311.

The ST-S311 goes for quite reasonable amounts on ebay - and worth a look. My one is probably going to be used as a dedicated M-S receiver plugged into an old desktop PC.

David

Sittingbourne”

Strange enough, I prefer the ST-S311 albeit only one aerial input... for the simple fact that you can ADD the FULL 8 character RDS station name whearas the ST-SB920 only gives you 5 characters to add a station name.

Also... (having owned BOTH tuners) I find that some stations have better reception on the 311 compared to the 920..which is bizarre.

The only modifications carried out are to the internal 'gain' pots...with NO further added 'narrow' filters'

I am currently using a Sony ST-S361 of which is 'narrowband' and has twin FM aerial sockets and an 'Attenuator' ...albeit only a 5 character 'manual' station name display...unless of course the station is strong enough to recieve it's 8 character RDS.

I personally find the ST-S361 BETTER (and more user friendly) than the 920....only with similar quality audio to the 920.

My ONLY flaw with the ST-S311 is the 'audio' quality is not as good as the 920 or 361.
Nick_G
02-03-2013
Originally Posted by Gary Brenton:
“Strange enough, I prefer the ST-S311 albeit only one aerial input... for the simple fact that you can ADD the FULL 8 character RDS station name whearas the ST-SB920 only gives you 5 characters to add a station name.

Also... (having owned BOTH tuners) I find that some stations have better reception on the 311 compared to the 920..which is bizarre.

The only modifications carried out are to the internal 'gain' pots...with NO further added 'narrow' filters'

I am currently using a Sony ST-S361 of which is 'narrowband' and has twin FM aerial sockets and an 'Attenuator' ...albeit only a 5 character 'manual' station name display...unless of course the station is strong enough to recieve it's 8 character RDS.

I personally find the ST-S361 BETTER (and more user friendly) than the 920....only with similar quality audio to the 920.

My ONLY flaw with the ST-S311 is the 'audio' quality is not as good as the 920 or 361.”

I bought a Sony ST-S770ES from eBay a few days ago. I have only given it a brief test run so far but it has all the bells & whistles including twin FM aerial sockets, wide/narrow IF, and the ability to assign names to favourite preset stations. There is no RDS. I haven't tried adding presets yet. But this tuner is vey solidly built, with an elegant appearance, as you would expect from an ES range product.

It isn't as selective as the Denon TU-800L and the Denon also might have a slight edge in audio quality, with the Sony sounding a touch 'thinner' but it really is a very nice tuner. It seems to be one of the better Sony models.
Nick_G
02-03-2013
It's been a struggle under all the QRM from SE England but there have been a couple of Germans heard this morning on the band: WDR 4 on 100.5 and B5 Aktuell on 106.9 from Grünten in southern Bavaria. It's hard work though!
Nick_G
02-03-2013
Around 12.40 I was receiving a station on 105.0 that was playing Anita Ward's 'Ring My Bell' followed by DJ chatter and a competition/promotion, then an ID jingle of 'Uckfield FM'. I looked it up on FMLIST and it is 25 watts vertical! Very good going as my Triax is horizontal.
Jack-UK
03-03-2013
I am receiving BBC Cymru on 104.3, amazing given BBC York is on the same frequency and their TX is only 30 miles away give or take. My tuner is also picking up BBC Gael on 104.2, BBC Leicester 104.9 and Gem 106. As I type this Cymru has faded out and BBC York is slowly coming back through, still amazed though.

I was using an FM Omni directional antenna on the roof.
Jack-UK
03-03-2013
Also just had BBC Nottingham on 103.8 and a very weak signal from Smooth Radio Derby 101.4.
Nick_G
03-03-2013
E.g. Brocken peaking up fair mono 101.4, Classic 21 87.6. And there was me thinking it was all over.
Nick_G
03-03-2013
Luxembourg good mono 100.7 and similar levels from 88.9. Hopefully this will be an interesting overnight lift.
sleeper77
03-03-2013
In my location, the tropo over the past few days has been pretty much hit & miss, although nothing spectacular. Usual French stations have good strength, low powered ones have been weak & so has Belgium. Nothing from Luxembourg or Germany, conditions not good enough for them here.
Nick_G
03-03-2013
Are you getting anything on 100.7 yet sleeper? It's 2 bars and stable (perfect mono/hissy stereo) here as I type this.
ShallowFire
04-03-2013
Belgium pushing across Essex nicely with Studio Brussel playing in stereo 102.1

Not a lot of French stations currently
Jim_AFCB
04-03-2013
Had Luxembourg both last night and this morning on 100.7, albeit somewhat hissy mono, was strong enough to be in noisy stereo.
Also Sat evening I had Clermont-Ferrand and Lyon TXs in, the latter is over 730km from here.

3 element horizontal yagi in the loft, Funcube Dongle Pro+ and SDR-Radio V2 software.

(Best with the vertical was VRT Klara from Egem, Belgium)

There were reports of N Spain (Bilbao) as well but nothing here on that score. Need to get that yagi higher, and outside.
Nick_G
04-03-2013
When I switched the tuner on at about 6.30 am Luxembourg was a good solid signal on 100.7. However as time went on it gradually deteriorated and it was really struggling by the time I left for work at 7.45. I think hr3 was in the background on 87.6 although Classic 21 was dominating.

After 1 am I was getting a good signal from hr3 on 89.3 last night.
Brightonelectri
05-03-2013
Last night Radio5 693khz relay had an odd bleeping sound in the background, two beats per second. Same sound on about 10 freqs in the AM band. Took radio outside to eliminate possible wi-fi interference but it was still there!
Had a trawl through the HF band and it was found again in the 90m band. Is this the dread HAARP?
JELLIES0
05-03-2013
Originally Posted by Brightonelectri:
“Have been listening to Democracy Now and NPR All Things considered on 846khz. The announcement stated programmes are via WRN. My list of stations lists 846khz as a transmitter near Moscow but signal so strong I wonder if it is nearer to the UK? There once was an italian station on this channel.”

Is it this station by any chance ? http://www.radionorth.net/Podcasts/Listen_Again.html

There doesn't seem to be any programme schedule on their website, but they sometimes come in here pretty well during the evening. Could they be using NPR as a sustaining service ?
MSmith
05-03-2013
If you want some easy long distance MW try VOA on 1530 kHz between 8 and 9 in the evening. The signal comes from just off the coast of central Africa. Don't know the exact distance but its a long way!
Jack-UK
06-03-2013
Originally Posted by MSmith:
“If you want some easy long distance MW try VOA on 1530 kHz between 8 and 9 in the evening. The signal comes from just off the coast of central Africa. Don't know the exact distance but its a long way!”

It comes from São Tomé and Príncipe, a Portuguese speaking island just off the coast of Gabon, W. Africa. The transmitter is just south of São Tomé town and broadcasts at 600 KW. That's about 3,550 miles from the TX to London (3,768 miles from the TX to my house!)
Ross Revenge
07-03-2013
Originally Posted by MSmith:
“If you want some easy long distance MW try VOA on 1530 kHz between 8 and 9 in the evening. The signal comes from just off the coast of central Africa. Don't know the exact distance but its a long way!”

Blimey- good shout. Picking it up here without the loop aerial- that's some catch and it's winning the battle the Gold station from Yorkshire.
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