As per my experiments with fixed audio out on pin 8 of the mic socket...
Don and Sverre were both correct in their assessment that changing the value
of the 10k resistor would make little difference. I tried a 3k and 2k in
it's place and could detect no noticeable difference.
I did however manage to fix my problem by simply using the 'mic' socket on
the PC soundcard, instead of the 'line-in'. In fact I need to run with the
slider control on the soundcard set-up at virtually zero, or it will
overload.
Thanks to Don and Sverre for their advice...Much appreciated guys.
David, VK2NU
David,
I would say the answer is 'maybe'. And the reason for the uncertainly is
that it depends on what you are driving. The impedance of whatever you
connect to the far end of the resistor will determine how much current will
be drawn and the voltage developed across it.
You can install the fixed audio board between the front panel and control
board if you lay the resistor and capacitors down flat on the board. The
fixed audio board will provide up to about 3 volts to the soundcard, and
that is much more than enough to overdrive it.
73,
Don W3FPR
> -----Original Message-----
>
> I'm just playing about with my K2 and have performed the mod to
> get a fixed
> audio out on pin 8 on the mic socket as per LA3ZA's instructions, using a
> 10k resistor between R3 and the mic socket.
>
> This works fine, but the audio out isn't quite enough to drive my PC
> soundcard to the level I would like. I have a small board here
> (as per Don's
> W3FPR design) for the small audio amp, but would prefer if possible to get
> the audio out of the mic socket without having to install this board.
>
> My question is.....would I be-able to get more audio out of pin 8 if I
> change the value of the 10k resistor in LA3ZA's mod ??
>
> Cheers All
>
> David, VK2NU
_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help:
http://mailman.qth.net/subscribers.htmElecraft web page:
http://www.elecraft.com
Locked
