[Elecraft] Microphones (was electronic product standards)

[Geoffrey Mackenzie-Kennedy]

Thanks for posting your interesting comments Brendan.

Within the context of SSB useage in ham radio I believe that the 'hype about 
audio' could lead to another related problem, if not already existing, which 
is poor use of the HF spectrum available to us. Given the proven fact that a 
SSB transmitter filter bandwidth of 2.1 kHz will result in the transmission 
of a very 'good quality' speech signal, provided that the carrier is 
positioned properly and that the mic - audio - modulator system 
characteristics suit human speech, I see no valid reason for using wider SSB 
filters. In addition to the increased amount of spectrum used, the use of 
wider filters followed by linear amplifiers whose IMD products might be only 
30db or so below a test tone obviously results in a wider 'Interference 
Bandwidth', and should be discouraged IMHO. Adding Reverse ALC to the mix 
can further increase interference.

Just an opinion.

73,
Geoff
GM4ESD


Brendan Minish  <ei6iz.brendan at gmail.com> wrote:

<snip>

> These words (in ham radio use anyway) have become marketing speak and
> now mean nothing. As a former audio professional I cannot understand why
> all the hype about Audio in ham radio and to my ears there's a lot of
> money wasted on trying to make SSB into something it isn't.

 <snip>