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Do it Yourself
Champ line outFrom detritu--(at)--x.netcom.com Wed Sep 23 09:12:27 CDT 1998
From: detritu--(at)--x.netcom.com(Lord Valve)
Newsgroups: alt.guitar.amps
Subject: Re: Champ line-out - how?
Date: 23 Sep 1998 07:12:17 GMT
X-NETCOM-Date: Wed Sep 23 12:12:17 AM PDT 1998
Xref: geraldo.cc.utexas.edu alt.guitar.amps:128504
In
>
>Mark,
>It would be best if you installed this into the chassis of the champ,
but
>you could build it onto another chassis. Take your speaker output,
shunt
>that across an 8 ohm 25 watt resistor. take the hot side of that and
run it
>through a 220 k ohm resistor and a 10 uf cap.
>eries. ---------/\/\/\/\/\/\/--------( )-+-----------> to the input
of the
>next amp. if you need more or less gain you can experiment with a pot
abput
>the same size as the 220 k resistor, and you can fudge a bit on the
cap,
>which should effect the tone a bit. Good luck.
>Dave
Lord Valve Speaketh:
Nah, that circuit is entirely bogus. First off, a Champ needs to
be loaded with 4 ohms, not 8. Second, all that's needed is a
voltage divider...WTF is the cap for? Whether you leave the
speaker connected or load the output with a resistor (4-ohm,
10-watt will be fine) all you need to do is use a 10/1 divider
circuit...put a 1.5K resistor in series with the output, and
use a 150-ohm resistor to ground right after the 1.5K. Output
is taken from the junction of the 1.5K/150-ohm network. If you
want adjustable output, put a 50K pot in parallel with the
divider network and take the output from the wiper.
Lord Valve
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