Quote:
Originally Posted by Neil Purling
So the ECH81 just makes less noise in the conversion process. And this is going to be noticeable to the naked ear?
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For a simple broadcast-band radio no, but on the shortwave bands yes.
The "Conversion conductance" of the ECH81 is also better than the earlier Octal valves [think of 'conversion conductance' as essentially the gain of the mixer, though it's really rather difficult to quantify gain in a mixer]