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Message |
    
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 2397
Registered: 7-2004
| | Posted on Friday, December 20, 2013 - 10:46 pm: | 
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Yes we still have a older style console TV... lol
I heard the newer tv's are better with cb interference? I don't know?
Anyhow this older TV of ours is so susceptible to cb interference that I turned my Grant with stock mic down to 1 watt and was still interfering... (Voice coming through speakers)
Radio/equipment & antenna are well grounded...
First off we have Direct Tv (satelite) and a VCR hooked up.
I unplugged everything from the TV and still heard my voice coming through the TV speakers.
So after reading the ARRL Handbook I decided to try and apply 1/4" snap on ferrite cores on the TV speaker wires and on the TV's ac power line.
The speaker wires inside the TV went from point A to B without much slack so that's why I chose the snap on ferrite cores.
I purchased some 1/4" snap on ferrite cores (1 MHz - 300 MHz) and applied a couple to the AC power line and it helped alittle bit.
I then applied a few ferrite cores directly on the wires close to each TV speaker and it helped even more.
So I purchased more snap on ferrite cores...
I ended up applying 5 ferrite cores close to each TV speaker. (Two speakers) (10 ferrite cores)
5 ferrite cores on all 4 speaker wires close to the circuit board of where the TV speaker wires originate.
And a total of 5 snap on 1/4" ferrite cores on the AC TV line cord...
This totally took care of the problem even running 100+ watts now...
I was very careful to unplug TV and to not touch anything inside TV besides the speakers wires.
As you know playing around in TV's can be very dangerous...
Road Warrior / CEF 375
Tyrone, PA (Jim)
Local ch. 27.505 Am or LSB
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Spiderleggs
Member
Username: Spiderleggs
Post Number: 52
Registered: 5-2002
| | Posted on Saturday, December 21, 2013 - 7:38 pm: |
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Good post thanks |
Tech237
Moderator
Username: Tech237
Post Number: 1720
Registered: 4-2004
| | Posted on Sunday, December 22, 2013 - 1:40 pm: |
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With plastic cases,filtering left out to keep prices down (believe it or not), and cheap construction, modern TVs can be as bad or worse for both receiving and GIVING interference.
Good article, and parallels one I wrote for my ex-employer just before they closed my section.
Tech237
N7AUS
God made me an athiest, who are you to question his wisdom?
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Dale
Senior Member
Username: Dale
Post Number: 2012
Registered: 12-2002
| | Posted on Sunday, December 22, 2013 - 6:33 pm: |
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tech237 your right. my NEW flatscreen tv puts
alot of noise in my recieve,.tried plugging into
the wall but made it worse. so i ended up plugging
into a muti plug and it helped [a little]but no tvi
to it though
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
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