[Elecraft] Interface and Ham Radio Deluxe

[Dave]

Ah, I'm sorry, I didn't realise that there were "experts" about.  Please 
google "expert" they will become clear when you do.  I, as a non-expert, 
will not have anything to say untill the "experts" have advised you as to 
what you should do in future.

I will now bow down to the experts in this list and no longer give my advice 
before the "experts" have held forth in future. (This is not about anyone 
from Elecraft, who will probably actually be experts in their field, but 
those who decide that everyone else is wrong until they agree with them, the 
experts.)

Dave (G0DJA)

----- Original Message ----- 
From: "Joe Subich, W4TV" <lists at subich.com>
To: <elecraft at mailman.qth.net>
Sent: Sunday, October 13, 2013 5:59 PM
Subject: Re: [Elecraft] Interface and Ham Radio Deluxe


>
>> You can still reduce the audio from the soundcard program and,
>> infact, this is what another bit of kit called the "PSK Meter"
>> effectively does.
>
> The problem with just using the sound card output level is that once
> the slider gets down around 10 - where it will be if you are driving
> an electret input without an attenuator - it is quite difficult to
> adjust accurately.  Since a mic input designed to work with a dynamic
> mic will be *another 20+ dB more sensitive* it is almost impossible to
> adjust between "no audio" and "overdriving the mic preamp" with the
> Windows mixer.
>
> Remember, typical audio levels are:
>   Sound card at maximum:  1.5 V RMS
>   Electet mic:  75mV RMS (26 dB below sound card)
>   Dynamic mic:   5mV RMS (26 dB less than electret, *50 dB* less
>                  than maximum sound card level).