Holme Moss (North Yorkshire, England) analogue radio transmitter
 | Google map |  | Bing map |  | Google Earth |  | 54.309,-1.857 or 54°18'33"N 1°51'25"W |
UK Free TV shows the coverage area for a radio transmitter as a coloured overlay (orange for FM, other colours for DAB) on the grey map. We have computed the coverage by combining the terrain with the official radiation pattern. A single click will select the transmitter to view the coverage for a single site, and a double click goes to a page showing full details. Click on the buttons in the right-hand corner of the map to choose from different frequencies (or multiplexes for DAB).
Are there any planned engineering works or unexpected transmitter faults on the Holme Moss (North Yorkshire, England) mast?
No problems on any service. 
Local transmitter maps
Monday, 2 January 2023
C
Chris.SE2:24 PM
Robert Lee:
Well definitely a bit odd. If you've given your aerial system and connections a checkout then it could still be an unreported fault or engineering. If it were propagation, then I'd expected the signal to make a gradual change (although it could do so fairly quickly) rather than suddenly much weaker. There's still no propagation predictions suggesting this might be the cause, but there could be temperature inversion which is probably something you can't readily predict in a particular location, but I would have expected other signals to be affected in some way.
Have you had a look for any very strong signals on adjacent frequencies - it's possible some sort of interference might be causing the receiver to be desensitised around 93.7 - some electrical/electronic gadgets, LED Christmas lights etc. or even a pirate radio station!!
I can't think of any other possibilities at present, if I do I'll post again and I'll check for any BBC reports as well.
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Robert Lee3:49 PM
Hi Chris, I find that the signal strength for all frequencies from Holme Moss can vary by ca. 10dB over a few hours, but R4 on 93.7 is consistently the weakest, whilst Classic FM on 101.1 is usually the strongest. Day/night or the weather doesn't seem to have any effect. At the moment I'm showing 47dB for R4 with the other frequencies between 55 and 60dB. Maybe water has got into the connection up on the aerial, but there is no way I can check that. I'm not aware of any interference on any stations, including other FM radios we have, and our Christmas lights are not on at the moment.
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Chris.SE11:39 PM
Robert Lee:
I've seen some strange things with standing waves in cables over time and nothing is predictable!
I note you had the TV aerial replaced (and presumably the coax downlead) a while ago.
Is it a totally separate downlead for the FM?
If so, does it terminate in a coax plug that goes straight into the receiver or does it terminate in a wall plate where you have a flylead to the receiver?
Whichever,, remove the coax plug if it goes straight to the receiver, or undo the wall plate and look at the end of the coax - disconnect if need be. Any sign of any corrosion or dampness/wetness which would show water has got in at the aerial and tracked down the coax?
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Tuesday, 3 January 2023
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Robert Lee1:06 PM
Hi Steve, Cable was replaced at same time as aerial and it feeds directly into tuner. Connection looks good. Just checked signal strengths and all are fine today. Guess we may never get to the bottom of the mystery. Thanks for your help.
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