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Post by Vasidae on May 15, 2011 11:52:42 GMT 1
Have the Tower and Ground UHF freqs. changed quite recently as I'm getting nothing on the listed Gnd freq, and the Twr freq now seems to be utilising the old Gnd. freq ?
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Post by Vasidae on May 15, 2011 13:15:53 GMT 1
outermarker, most of the VHF freqs are re-transmitted on UHF, not only at Liverpool but most other large airports as well.
Its the UHF Freqs. in the 455Mhz range I'm after, but thanks anyway.
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Post by Vasidae on May 16, 2011 7:06:07 GMT 1
can someone PLEASE pm/email me these freqs. my list has gone awol.  |
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Post by jbmack on May 16, 2011 9:55:19 GMT 1
If you have a search facility on your radio set it to search between 455.000 and 456.000 in 12.5 khz steps nfm.
jbmack
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Post by Blue Sky on May 16, 2011 16:52:01 GMT 1
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Post by Vasidae on May 16, 2011 18:05:54 GMT 1
Thanks Jimp , I have known about this document for some time now and although it does say Tower on 455.6375, they were actually transmitting Twr on 455.8000 on sunday afternoon. Also the .6375 uhf gnd was dead even though the vhf gnd was active. This was why I requested any info re. freq. changes as I thought they had had a clear out although it now appears they must be able to rotate the uhf freqs or use freqs to cover as and when needed. Thanks for everyone who got back to me with info - much appreciated  Vasidae. |
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Post by Vasidae on May 18, 2011 10:51:59 GMT 1
Ground - 455.6000 nfm
Tower - 455.8000 nfm
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Post by Biggles on May 18, 2011 20:52:05 GMT 1
Depending on the quality of the rx being used some variation in the shown frequency figures can occur on units being used, as in this Ground nfm 455.600 and 455.6375 query.
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Post by urgentemente on May 19, 2011 11:06:05 GMT 1
As this was new news to me, I tried listening on the UHF freq's last night but didn't hear anything.
Is it just a retranmission of the comms *from* Tower/Ground, and hence I wouldn't catch the aircraft talking back on it (I can't normally hear tower etc from my location) ?
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Post by Vasidae on May 19, 2011 12:12:11 GMT 1
Yes, the UHF's are re-transmitted VHF freqs.
However, if you cant normally hear VHF tower/ground comms. from your location then its slim that you will receive the UHF transmissions although the reception can quite often be stronger and more audible than VHF.
Also, the Ground freq. shuts down in the evenings and traffic is handled by the Tower. so you wouldnt usually hear any Ground comms. during the quiet periods anyway.
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Post by urgentemente on May 19, 2011 16:12:44 GMT 1
Thanks for that vasidae. I was hoping that the (possibly) stronger UHF transmission might enable me to pick them up more often when I'm not actually at the airport (haven't been down there for what seems like a very long time!), handy to know the frequencies tho, I'll leave them in the scanning range as 2 extra channels won't make much difference I did know/assume that ground closes in the evening, as the only times I've heard it was on the odd daytime visit in the past. Question tho : do they normally use the ground freq in the daytime at weekends, or is it mainly through the week, or does it just depend on expected number of movements? |
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Post by Biggles on May 19, 2011 23:00:54 GMT 1
Radio reception is fickle at times, for example I used to listen quite often to London Information Freq from Wallasey on a hand held icom and also a realistic base station. I could get clear tx and rx from the controller and also aircraft crossing the English Channel, I was impressed with the clarity and reception for such a long distance.
Would be interesting id any other members can manage that particular station. It was London Info vhf 127. ?
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Post by coaxingtin on May 20, 2011 15:31:06 GMT 1
The reason why VFR traffic over the Channel can be heard up here is that the aircraft transmissions are re-broadcast by the ground station using several remote transmitters. Such is the wide coverage of London Info that aircraft are likely to step on each others' transmissions without realising it. This way they should be able to hear each other when theoretically too far apart to do so. You can also get ranges far beyond VHF line of sight due to atmospheric "ducting" but this is a pretty rare phenomenon when the pressure is very high.
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Post by mictheslik on May 20, 2011 16:04:10 GMT 1
I did know/assume that ground closes in the evening, as the only times I've heard it was on the odd daytime visit in the past. Question tho : do they normally use the ground freq in the daytime at weekends, or is it mainly through the week, or does it just depend on expected number of movements? Yep, ground is open during the day at the weekends, though from my experience flying it usually closes late afternoon. .mic |
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Post by Biggles on May 20, 2011 17:20:50 GMT 1
Its 5.15pm and I am in Frodsham with my little icom hand unit.tuned to 455.650 FM! I have Manchester ground crystal clear aircraft and control.
Pakistan 710 just cleared to Lahore.
I can usually see LJL from here. but ground reception was poor on.455.65 and was drowned out by M CR?
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