Three TVS and an attic mount? You're suffereing quite a bit of signal loss in the cabling, even amid such strong signals. Here are your alternatives for better KCBS reception:
* Re-locating the current antenna to the roof.
* Adding a pre-amp such as Winegard's HDP-269 to the attic antenna. My earlier comments about pre-amps assumed two TVs. With the antenna in the attic and three TVs, a low-gain, high-input model is needed to counteract those dropouts/reception losses.
* Replacing the attic antenna with a bigger, traditional-looking model. I'd suggest a Winegard
HD-7694P. The 7694 sports significantly higher gain than your current antenna. I doubt you'd need a pre-amp with it.
Replacement would cost a bit more, but wouldn't mean paying for electricity to power the pre-amp. At 110 volts, the pre-amp consumes 22 watts an hour, or 16 kWh per month. That's nearly 30 bucks a year at 15 cents a kWh.
