[Elecraft] Griffin EarJams

[Chris Kantarjiev]

Bill W5WVO wrote:
> Chris Kantarjiev wrote:
> 
>> An interesting artifact of this is that at the very bottom of the AF
>> pot's range, there seems to be an area where I can hear very weak
>> signals but the atmospheric noise hasn't quite come in...
> 
> This is fascinating. It could be an artifact of the radio's design, 
> or... Could we possibly be seeing a process here in which the dynamic 
> range of the human ear/wetware is being increased by lowering the 
> amplitude range of the input? Maybe mammalian ears evolved to work 
> better (i.e., more discrimminatingly) at lower volume levels... This 
> might make sense in evolutionary terms, when you come to think about it.

Or my ears could be broken :-)

Now that you mention it, though, it mimics my experience at louder 
volumes, where turning the AF gain *down* makes the signal stand out 
more and copy easier.

I was just really surprised to hear the volume of the noise seem to come 
up separately from the signal. And pleased to find that I could hear the 
signal with the EarJams on, and that it was completely missing with them 
off ... but I don't have a closed headphone to compare with.

All this will probably be moot in, oh, a couple of years when the 
sunspots come back :-)

73 de chris K6DBG