Quote:
Originally Posted by Ziffster
CBLN has moved from 40 to 23 and also reduced power to 24 kW (85% reduction). After the change the signal is now so weak that we have trouble picking up CBLN.
That was my feeling, that 23 db was too much, but the seller claimed that overload shouldn't be a problem since we will have 150' of cable and a three way splitter so cabling loss will be around 14 db more than if we had the antenna hooked up directly to the antenna. BTW the CPA-19 was added to offset these losses, realizing the if not for these losses a booster wouldn't be needed.
Sine the pre-amp is really needed for the VHF range more than the UHF range. To eliminate risk of overload (and since the only week stations are VHF) can the joiner be added after the booster rather than before it?
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I would be inclined to aim the VHF antenna directly at CH-13 to reduce the amount of power from CH-10. Install the CPA-19 on the output of the VHF only. As you say, combine the amplified VHF with the unamplified UHF.
If you run into overload problems you can still add a UVSJ ahead of the CPA-19 with the UHF port terminated by a 75 ohm 'F' terminator cap. That would suppress the UHF power received by the VHF antenna another 20 dB or more.
The UVSJ used to combine the signals from both antennas would need to pass power through the VHF port or be located downstream of the CPA-19 power insertion block (which needs protection from the elements, it's designed for indoor installation).