Re: [amsat-bb] HDTVI

[Ernie Howard <w8eh-Ernie@xxxxxxxxxxxx>]

Al,

By chance do you have an amplified DTV antenna? The ones that I looked into 
were broadband and can be easily overloaded by transmitters anywhere in the 
60-700 MHz range. That will cause your DTV reception to drop off.

I have no trouble with QRM to my HDTV over the air reception here (25 miles 
from most stations in Cincinnati). My 145/435 sat antennas are about 40 feet 
away have no effect on the DTV. The 144.39 packet antenna is on the same 
mast as over the air HDTV antenna and it does not bother HDTV either.

I can't put my finger on it, but there is a company out there that makes 
VHF/UHF amateur band notch filters with "F" connectors to place in line with 
a TV antenna. A filter of this type would need to be placed between the 
antenna and any amplifying device to do any good.

Several companies make amateur high/low/band pass filters. One of them may 
make a special one with the right connectors for you:
http://www.parelectronics.com/
http://www.dci.ca/?Section=Amateur
http://www.iceradioproducts.com/

Ernie
W8EH


Al Riccio wrote:
> HDTVI
> 
> Transmitting at my Maryland/DC location on the 145 and 435Mhz satellite
> operating bands knocks out my over-the -air
> 
> HDTV reception.  All my antennas are located in my attic due to local
> restrictions.  Is there a commercial high pass RF filter that cuts off at
> approximately 530 Mhz that I can install on my TV antenna and receive the
> Network stations?  Is there another fix besides shutting down or subscribing
> to Cable?
> 
> 73, Al
> 
> W2NBJ
> 
> alriccio@ieee.org
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-- 

------------------------------------------------------
Ernie Howard, Jr    W8EH    Middletown, Ohio
E-mail: w8eh@arrl.net
How's the weather at W8EH? - http://wx.findu.com/w8eh
Web Page: http://home.cinci.rr.com/w8eh
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