AudioRoundTable.com - RDF feed
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description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: Integrated Preamplifier
items: Re: Integrated Preamplifier

Integrated Preamplifier
type: item
description: Hi Everyone, My latest creation an integrated tube preamplifier. It uses only tubes in the active circuitry but has a digital remote control volume (resistor switched by relays) and source selection. Full phono preamp (like the Groove) and allows for passive or active line stage with a gain of 15 db. Still breaking in, but sounds lovely. It is not a simple project, although a good diyer could do it. Care in layout and wiring technique is important. I'll post a schematic when I get one cleaned up. BTW the PS uses 1500uf of 500VDC caps, heaters another 15,000 more and about 30uf of polys.
creator: gofar99
date: 2012-01-17T19:48:13-00:00

Re: Integrated Preamplifier
type: item
description: That amp looks awesome, really sweet!
creator: Wayne Parham
date: 2012-01-17T20:16:09-00:00

Re: Integrated Preamplifier
type: item
description: Hi, Thanks, It sounds better than I thought it would with the substitute caps (Jantzen Crosscaps) in place of the Silver Zs on order and the power supply voltages are low by about 10% (new design transformer coming to fix that). Still a really clean sound. I expect to burn it in for a week or so and then do measurements on it.
creator: gofar99
date: 2012-01-17T20:33:19-00:00