So how many countries still using OIRT ?

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dxradiofan
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So how many countries still using OIRT ?

Post by dxradiofan » 26 Jun 2015 23:25

Apart from Russia Ukraine and Belarus are these the only countries still using OIRT ?

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Julian Hardstone
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Re: So how many countries still using OIRT ?

Post by Julian Hardstone » 26 Jun 2015 23:52

FMLIST shows Moldova was logged this year, and was heard last year in Suellwarden. Armenia and Turkmenistan have also been logged - but not from Western Europe :-(

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John Faulkner, Skegness
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Re: So how many countries still using OIRT ?

Post by John Faulkner, Skegness » 27 Jun 2015 00:45

I had Moldova a few days ago. Ukraine and Belarus and Russia are regular in the UK at this time of year.

Best thing is to enter a frequency in FM List. http://www.fmlist.org/ Anything which has left the air is removed.

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Re: So how many countries still using OIRT ?

Post by Alex Lawler » 23 May 2016 20:43

How does it stand now? Is it just Russia and a few close neighbours? What about double and triple hop? Anything from Africa and further a field?
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satnipper
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Re: So how many countries still using OIRT ?

Post by satnipper » 24 May 2016 08:04

The OIRT band (as the name implies) was/is used by Eastern European countries (including the Soviet Union).

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Re: So how many countries still using OIRT ?

Post by Alex Lawler » 24 May 2016 11:20

Thanks.
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Re: So how many countries still using OIRT ?

Post by Tim Bucknall » 24 May 2016 12:18

Ukraine, Russia & Belarus are the ones you'll meet most often

China use that range for ultra Low power stuff like university radio stations but its unlikely to propagate
Italy has some links in the 64-70 range but they seem to be getting rarer

the breakaway republic of Transdneistria has some OIRT
someone posted a fascinating bandscan from a border crossing to skywaves yahoo group recently

Kirghizia has OIRT fm but just relays of Russian networks so you'll have to be really on the ball to id them
powers are reasonable- 20kw, so its not out of the question

what rx are you using? you need to be able to know which channel you're hearing ie: 66.26 not 66.29
a cheap scanner in nfm mode will do

would love to get some double hop from Siberia or Altai but the low powers are ridiculous
http://www.fmlist.org/fi_auswahl-zeigen ... 1&sort=QRG

http://www.fmlist.org/fi_auswahl-zeigen ... 1&sort=QRG

what use is 3 watts in the Siberian Tundra?!
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pe1etr
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Re: So how many countries still using OIRT ?

Post by pe1etr » 24 May 2016 13:56

Tim Bucknall wrote:Ukraine, Russia & Belarus are the ones you'll meet most often

China use that range for ultra Low power stuff like university radio stations but its unlikely to propagate
Italy has some links in the 64-70 range but they seem to be getting rarer

the breakaway republic of Transdneistria has some OIRT
someone posted a fascinating bandscan from a border crossing to skywaves yahoo group recently

Kirghizia has OIRT fm but just relays of Russian networks so you'll have to be really on the ball to id them
powers are reasonable- 20kw, so its not out of the question

what rx are you using? you need to be able to know which channel you're hearing ie: 66.26 not 66.29
a cheap scanner in nfm mode will do

would love to get some double hop from Siberia or Altai but the low powers are ridiculous
http://www.fmlist.org/fi_auswahl-zeigen ... 1&sort=QRG

http://www.fmlist.org/fi_auswahl-zeigen ... 1&sort=QRG

what use is 3 watts in the Siberian Tundra?!
A correction about China, Tim.
The Chinese "Campus Radio" band is from 76-87MHz and is thus above the OIRT FM band.

China TV channel C3 is within the OIRT FM range however, vision 65.75MHz, sound 72.25MHz. Good luck receiving that from the UK. There is at least one C3 txer in Xingjiang carrying HTTV, which I received in Biratnagar, Nepal via Es in 2014.
Peter

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Re: So how many countries still using OIRT ?

Post by Tim Bucknall » 24 May 2016 16:22

thanks

65.75 Karamay has been rx'ed in the UK by that Tim Bucknall guy. when all the sensible people are away at work
its always morning round 10am
always in with the baltics, since they went qrt i never had reason to hang around on 65.75 so haven't had it for a few years
it can reach good strength for short periods

only ever had weak slush on the audio freq once
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Alex Lawler
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Re: So how many countries still using OIRT ?

Post by Alex Lawler » 24 May 2016 16:37

Tim Bucknall wrote:Ukraine, Russia & Belarus are the ones you'll meet most often

China use that range for ultra Low power stuff like university radio stations but its unlikely to propagate
Italy has some links in the 64-70 range but they seem to be getting rarer

the breakaway republic of Transdneistria has some OIRT
someone posted a fascinating bandscan from a border crossing to skywaves yahoo group recently

Kirghizia has OIRT fm but just relays of Russian networks so you'll have to be really on the ball to id them
powers are reasonable- 20kw, so its not out of the question

what rx are you using? you need to be able to know which channel you're hearing ie: 66.26 not 66.29
a cheap scanner in nfm mode will do

would love to get some double hop from Siberia or Altai but the low powers are ridiculous
http://www.fmlist.org/fi_auswahl-zeigen ... 1&sort=QRG

http://www.fmlist.org/fi_auswahl-zeigen ... 1&sort=QRG

what use is 3 watts in the Siberian Tundra?!
Fascinating stuff. I'd love to get double hop from Siberia as well. For OIRT I use the Tecsun 390. Out of interest why do low power Txs not propagate well via SpE? I understand why tropospheric modes of reception wouldn't(degraded as they travel via the troposphere) but with SpE signals they are caught by a cloud in the ionosphere then dropped to the receiving location without signal degradation that is present in tropospheric enhancements?
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Re: So how many countries still using OIRT ?

Post by satnipper » 26 May 2016 20:51

What do you mean by "signal degradation"? Tropospheric propagation guards the polarity of the original signal whilst Sporadic E certainly doesn't. In any case the most important criteria for receiving signals is the s/n ratio. By definition low power signals will have a worse s/n ratio than high power ones.

Stuart

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