[sdiy] reamp?

[Larry Spence]

The idea of the Reamp is supposed to be that you want to play something back
from tape (or other high-level source) through a stompbox, or into the
guitar input on an amp.  So if you tried to do this directly, you would have
to turn the levels on the tape deck, mixer, etc almost all the way down in
order to not overload the stombox or amp input, which is expecting a
guitar/mic level input, and you wouldn't get optimal S/N.  What I don't
understand (but I'm not an electronics guru like you folks) is why impedance
matching is needed, as opposed to just a pad.  I understand that you can't
run a high-impedance output into a low-impedance input, but what's the
problem with running a lo-Z output into something with a 1M input impedance,
assuming you use a pad to get the level down to what the input will accept
without overloading?

btw, if you have piles of cash sitting around, the rich man's Reamp is:

http://www.littlelabs.com/pcp.html

btw, the Reamp does claim to use some fancy ultra-flat transformer.  And the
$950 (plus shipping!) PCP uses lots of snob components.

Larry


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of tomg at efm
Sent: Thursday, August 23, 2001 3:57 PM
To: grichter at asapnet.net; owner-synth-diy at dropmix.xs4all.nl; synth-diy
Subject: Re: [sdiy] reamp?


I can DIY this for under $50. That must be some kind of "high quality"
transformer in there to justify $200. If you were willing to swap opamps
and batteries for the xformer you could do it for less than $10. I get it,
I just don't get the $200 tag.

Go plug your balanced low impedance sm58 into your stereo's aux in
and you'll see instantly what it's about.

Here's one for $22.50
http://www.tapespot.com/2630092.htm

Tom


> I would also like to know what this does? And why use it at all since a
> potentiometer is all that is needed? I put my scope on an electric bass
and
> guitar and show 1 volt peaks for a hard slap. Isn't that close to line
level
> anyway?
>
> I don't get it.
>
> >
> > anyone out there familiar with this device?  (if not, www.reamp.com)
> > takes a line level signal and converts it to a high impedence signal
> > that can be fed to guitar stomp boxes, amps, etc.  seems easy enough,
> > described by one reviewer as "just a simple box with a transformer and
> > potentiometer."  anyone have any hints where to start looking to do this
> > kind of thing?
> >
>
>