[linux-audio-dev] [ann] unmatched - a LADSPA amp tone

[Tim Goetze]

Paul Winkler wrote:

>On Thu, Oct 24, 2002 at 05:31:04PM +0100, Steve Harris wrote:
>> On Thu, Oct 24, 2002 at 08:23:32 -0700, Paul Winkler wrote:
>> > On Thu, Oct 24, 2002 at 08:41:36AM +0100, Steve Harris wrote:
>> > > Looking at the scope traces from that guys site (which I will read later
>> > > today), there is some fairly serious HP filtering going on sometime after
>> > > one of the amp stages.
>> > 
>> > Output transformer? Certainly they don't have infinite response...
>> > It's not clear to me where and how those scope shots were taken.
>> 
>> Could be. Aparently there is often HP filters insode amps to strop the low
>> freqs dominating though.
>
>I'm looking at a schematic for an 18-watt marshall at the moment...
>there's a cap between the input gain tube and ground which *might*
>be a HPF, but I don't really grok tube circuits well enough to be sure.

an introduction to their basic operation is here:

http://www.eecs.umich.edu/~mmccorq/tubes/introduction/introduction.html

starts with 'what is a tube' and ends up having handled
almost everything i find inside my super 60.

tim