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
