--- In [email protected], "skipp025" <[EMAIL PROTECTED]> wrote:
> The > circuit was not a true Signal to Noise voter... just a rectified > hf noise circuit. The level setting was rather critcial to make > it play as best possible. I disagree with your above statement. The DHE voter is not "a rectified hf noise circuit". The Doug Hall Electronics 4RV and 4RV/2 Voters use a log amp and peak valley circuits. It is a relative comparator between channels so the output is not a S/N value, but the comparison is based on S/N ratio. Looking at the envelope of the audio, the peaks are the signal, the valley is the noise floor. Signal to Noise. You may be confusing the DHE voter with the LDG. My understanding of the circuitry in the magazine article (that the LDG was based on) is that it uses rectified high freq noise. Early DHE voter production runs used thumbwheel pots, and that made the level settings a little touchy. To the person who is looking for a 4RV manual from 1987, get me your mailing address. I'll be glad to send you a copy. Duane Hall, AB8QU Doug Hall Electronics
