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![]() "sparky" schreef in bericht ... See this picture HR)-60 http://www.universal-radio.com/CATAL...xvr/HRO60.html it has a meter with the zero on the left. On Dec 21, 7:39 pm, Kenneth Scharf wrote: sparky wrote: Why is the meter 'zeroed' against the right peg, is it broken? Or did National design it that way because they had a backwards meter circuit that pulled full current with zero signal? This is a backward meter by National. The meter deflects left when current flows. The radio must have had a backwards meter amplifier then. Weird. Guess one could design a proper solid state amplifier to make it work, but you'd have to 'zero' the meter at full scale with no signal. The AR88 had also a meter with the zero left (when there was a meter anyway, because many had no meter at all) It measured the cathode current of one of the IF tubes. (Less amplification/cathode current means more signal). That leads to the somewhat odd 'zero right' configuration MRe PE1NQr |
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