Signal difference in different temperatures??

[Mr Tony]

Now, I know when it gets humid, you might be able to get far TV & Radio stations. Its been real humid here lately (today its suppose to be 96 with dewpoints in 70’s). So Ive been able to get some far distant TV stations

Does this effect the signal for the FTA systems?

Reason I ask is ONN has been at about 60 lately (normally its around 90) , but a feed on SBS6 that is normally a 25 and breaking up was a 45 and solid.

Couple other channels that are usually low (around 30) were real high yesterday (one was up to 50)

Does temperature make a difference?
Doc Scott is usually at 50 during the day but 75 around 7-8 at night
Converselly, May 2 & 5 (Lord & Taylor) are at 75 during the day but 60 at night

I'm using the Winegard 30" that Ive used for 18 months now

 

[John W]

The guys on the AMSAT forum can probably explain it best but here is a little paper describing what you may be experiencing
http://www.ravfm.com/bbc_interferance.pdf

 

[Mr Tony]

Thanks for the info!

I knew about the TV reception part (as when I lived in Duluth, I got Wausau Ch 7 & 55 with rabbit ears) because last night here in Minneapolis I had Channel 13 out of Eau Claire, WI (which was funny since it overrode Ch 13 Univision from Minneapolis WUMN)

So it does the same thing to FTA then? Weird……..

 

[mkm4]

Now, I know when it gets humid, you might be able to get far TV & Radio stations. Its been real humid here lately (today its suppose to be 96 with dewpoints in 70’s). So Ive been able to get some far distant TV stations

Does this effect the signal for the FTA systems?

Reason I ask is ONN has been at about 60 lately (normally its around 90) , but a feed on SBS6 that is normally a 25 and breaking up was a 45 and solid.

Couple other channels that are usually low (around 30) were real high yesterday (one was up to 50)

Does temperature make a difference?
Doc Scott is usually at 50 during the day but 75 around 7-8 at night
Converselly, May 2 & 5 (Lord & Taylor) are at 75 during the day but 60 at night

I'm using the Winegard 30" that Ive used for 18 months now

LNB's tend to work better at lower temperatures. If you are getting opposite results, there may be a problem.
The LNB could be going bad or their could be issues with the night performance of the satellite. An uplink center might also use different power settings during the day than at night.
You might also have cable connection issues that are affected by temperature and moisture.

 

[Mr Tony]

Not the cabling…that was just replaced about a month ago : )
The LNB is the Invacom…and I did get that recently

Probably the latter…the signal thingy.

 

[mkm4]

The guys on the AMSAT forum can probably explain it best but here is a little paper describing what you may be experiencing
http://www.ravfm.com/bbc_interferance.pdf

This has no effect on satellite transmissions.

Quoting from the article, (emphasis added)

The ionosphere plays an important part in LF, MF
and HF broadcasting (ie long wave, medium wave
and short wave radio) but its influence diminishes with
rising frequency.