Originally Posted by Konrad2
> HOWEVER, it is best to use a separate Preamp (or NO Preamp) for
> the FM Tuner to avoid degradation of the FM signals due to
> Third-order Intermod products between strong VHF signals.
You could put a FM-band bandpass filter ahead of the amp to
keep VHF (and everything else) out. A bit of channel 6 (and
a bit of whatever is just above FM) will leak in since the filter
slope isn't infinitely steep.
Thanks for the advice. I don't think that will be necessary though. We have one hi VHF station here, KBMT, on RF channel 12, with an ERP of 18.2 KW. They had a CP to go to 160 KW, but let it expire without action. The only other hi VHF station I can recieve is KPLC on RF channel 7 with an ERP of (I think) 62 KW which is 63.3 miles away.
There is a LD RF channel 6 licensed to the area at 300 Watts, but I am barely inside the coverage contour and it is a phantom anyway. It never was built from what I can tell.
The CM 7777 that I am using to drive the signal that I am recieving from the Antennacraft FM 6 is working wonderfully well. I am very happy with the results. I am reliably getting stations from the Houston area from over 85 miles away. I was listening to KTBZ yesterday for several hours and I was getting the digital signal most of the time, with intermittant bumps back to analog occasionally. I really enjoyed being able to listen to that station...