Adjustments to the theory are described to account for preamplifier noise contributions.

But it was many years later, using a low noise GASFET preamplifier.

To make things even clearer, a preamplifier boosts the signal to the television.

I was hoping to make some Moonbounce contacts, but at that time it was very difficult to construct low noise preamplifiers.

Preamplifiers with fixed gains of 10(5) VA and custom built amplifiers with variable gains are used for signal amplification.