Re: What happened to Channel 1?

A few years later, we moved HBO to channel 2 (so we could sell

> HBO to hotels and motels), installed negative traps to secure > it, .....

Whereup> What science can take away, science can put back. Those traps

did _not_ *completely* eliminate the signal getting into the > customer premises, they just made it so weak that a > conventional TV set couldn't amplify it enough to make a decent > picture. A decent high-gain single-channel pre-amp, on > the other hand, installed 'in front of' the TV receiver, could > do a surprisingly good job of resurrecting the 'killed' signal. >

Except that the relevant parameter is noise figure, not gain. To the extent that the preamp has a better (i.e., lower) noise figure than the TV set's own tuner (and holding all other variables constant), you'll get a decibel-for-decibel improvement.

But even a relatively low-gain preamp (say, ca 20 dB) will show similar improvement if it has a similarly lower noise figure.

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Neal McLain

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Neal McLain
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