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Hi Andy, No confusion, it's a helpful explanation. thanks. Ian. ----- Original Message ----- From: "andy butler" <akbutler@tiscali.co.uk> To: <Loopers-Delight@loopers-delight.com> Sent: Thursday, December 06, 2007 8:33 AM Subject: Re: inexpensive small true mic preamps > Ian Popperwell wrote: > (but general to the discussion > >> the sound nicely. You could try the TL Audio FatMan or the Fat2 (I have >> the Fat2) and it's a tube pre with a tube compressor and is about 4U >> high, but half rack width. - it sounds great and they sometimes go >> secondhand (no longer made). >> > > The TLA stuff is very good, but mostly they use hybrid design). > They also do the only "true tube" pre-amp that I know of > ( er..there may be more, but I can't afford them anyway) > this is the PA-1, it has a specialist pentode valve as the first > stage of amplification. > > Generally they use transistors for the first stage, because there's less > noise(eg, the Fat2. > > ECC83/12AX7A valves are then used for the second (less gain) stage of > amplification. > As is almost always the case with "tube" mic-pres, really they are > transistor > pres followed by a valve stage for coloration. > I've been tempted to say that it's only a "true tube" if the actual > pre-amp (the critical first stage of amplification) is a valve. I hope > that hasn't caused confusion, as this quite plainly disagrees with > manufacturers claims for their products. > > andy butler > > >