Portable radio in train, bad reception

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SUMMARY

The discussion centers around the poor radio reception experienced while traveling on a train, specifically using a portable radio receiver integrated into earphones. Users noted that reception worsens as the train progresses, likely due to distance from the radio broadcaster and interference from the train's electrical systems. The braking of the train also causes immediate loss of reception, suggesting that electrical interference from the train's engines and possibly high-voltage wires along the tracks significantly impacts radio signal quality. Recommendations include testing a better radio receiver before purchasing one.

PREREQUISITES
  • Understanding of radio frequency reception and interference
  • Familiarity with FM and AM radio broadcasting
  • Basic knowledge of train types (diesel-electric vs. electric with overhead catenary)
  • Awareness of electrical interference sources in transportation environments
NEXT STEPS
  • Research the effects of electrical interference on radio reception
  • Explore different types of portable radio receivers and their specifications
  • Learn about the operation of diesel-electric and electric trains
  • Investigate the impact of high-voltage wires on radio signals
USEFUL FOR

Train commuters, audio enthusiasts, radio hobbyists, and anyone interested in understanding radio reception issues in mobile environments.

Nick89
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Hi,

I travel by train nearly every day, and I am using a crappy portable radio connected to my phone (it's just a very small radio receiver built into the earphones) to listen to the radio during the journey.

I can't help but noticing two effects, one that can probably be explained pretty easily, but one that I cannot explain:

1. While the journey progresses, the reception (is that the correct word?) becomes worse and worse. Sometimes it is worse than other times; I may hear no noise whatsoever on same days, and only noise on other days.
I thought this could be explained easily because I am traveling further away from the radio broadcaster near my area, and I may have to change the frequency to get a better reception.
However, once I get off the train and have left the station, the reception is usually back to normal!

2. When the train starts braking when it arrives at a station, and when I am close to either end of the train cart, my reception is suddenly completely gone. It is not a coincidence; the trains engines sound like some electrical whine, and when they start to brake it is clearly audible by the change in engine sound. The radio reception is gone the instant the train starts braking.
If I am in the middle of the train cart when the braking occurs, the reception loss is not so obvious, although it is still present.I am merely wondering, what can cause this? I don't know if the train's engines are electric or not (they sound like it though), maybe they cause some interference somehow?
I can't understand the relevance of the braking though, nor the relevance of my position inside the train cart.

Finally, is there anything I can do about this except buy a better radio receiver? It's not very important of course, but since I was wondering about this I decided to ask. The noise does get very annoying and I'd like to listen to the radio properly...

Thanks!
 
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The noise is obviously due to electrical sparks that emit the whole range of radio waves. I am afraid you cannot get rid of it even with a better receiver. Before buying a better one, borrow one to check.

Concerning the braking effect, I have no idea. Maybe some strong magnetic or electric field affects (tunes away) the receiver frequency?

Bob.
 
I like the sparks idea, but that does not explain why there is no noise for like the first 15 mins of the journey. After about 20 minutes or so the noise starts and worsens progressively.
 
Nick89 said:
I like the sparks idea, but that does not explain why there is no noise for like the first 15 mins of the journey. After about 20 minutes or so the noise starts and worsens progressively.

It may be sparks from high-voltage wires along (or close to) the train way, not only sparks from the train contacts.

Bob.
 
Last edited:
What kind of train are you on - a diesel electric, an all electric with overhead catenary or one with a third rail?

Are you listening to AM or FM?
 
Both the first and the second. I'm listening FM.
 

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