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Re: IR Remote Control [message #75184 is a reply to message #75183] Tue, 08 January 2013 11:31 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18670
Registered: January 2001
Illuminati (33rd Degree)

Speaking of cable TV isolators, what I always used were the old 75Ω/300Ω matching transformers. Now days, the isolators are probably becoming very common because most people are connecting their home theaters to cable TV. But not long ago, there wasn't such a thing to be found. So I used 75Ω/300Ω matching transformers instead. You need two: The 75->300, connected to the 300->75. It works great, only introduces a couple dB loss (which is probably the same as the isolators) so if you have any of the old matching transformers laying around from back in the analog antenna days, don't hesitate to use them.

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  • Attachment: 300.75.jpg
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