Valve Pre for Chip Amp

FastEddy · 7th December 2006, 07:53 PM

" ... I'm now interested in building a tube pre-amp to go with it if anyone has any suggestions... "

Me too! Ideally a tube pre-amp with just a few of balanced or unbalanced (stereo) source inputs ... kit or ready made ...

Kooka · 7th December 2006, 08:22 PM

Quote:

Originally posted by FastEddy
" ... I'm now interested in building a tube pre-amp to go with it if anyone has any suggestions... "

Me too! Ideally a tube pre-amp with just a few of balanced or unbalanced (stereo) source inputs ... kit or ready made ...

What about this?

jleaman · 7th December 2006, 08:37 PM

Quote:

Originally posted by Kooka

What about this?

I'll buy a board.

billbo · 7th December 2006, 08:48 PM

I have designed a line level preamp using a 12au7 and a small bunch of components. Very easy to build. If you are interested I can dig it up and post/email the schematic.
Billy D...

FastEddy · 7th December 2006, 08:57 PM

Kooka & Billbo:

A single channel tube pre-amp?? Using dual 12au7 for balanced input??

Noticing that Kooka's board above has provisions for three full wave bridge rectifiers ... ?? is all that required for a single channel ??

Or am I mis-reading the board layout and this is a dual channel circuit??

Anyway, I could very easily be persuaded to get enough boards and parts for two complete, two channel pre-amps (2 boards or 4?).

(Oops, just spotted the double gain variable resistors indicating two channels per board.)

(Also, can or should the 12ax7 be used as substitute??)

Got schematics?

Seabass · 7th December 2006, 08:59 PM

Quote:

Originally posted by Kooka

What about this?

What is this amp?? More details please!!

Cheers

Kooka · 7th December 2006, 09:22 PM

Quote:

Originally posted by FastEddy
Kooka & Billbo:

A single channel tube pre-amp?? Using dual 12au7 for balanced input??

Noticing that Kooka's board above has provisions for three full wave bridge rectifiers ... ?? is all that required for a single channel ??

Or am I mis-reading the board layout and this is a dual channel circuit??

Anyway, I could very easily be persuaded to get enough boards and parts for two complete, two channel pre-amps (2 boards or 4?).

(Oops, just spotted the double gain variable resistors indicating two channels per board.)

(Also, can or should the 12ax7 be used as substitute??)

Got schematics?

Yes, 2 channels.

Kooka · 7th December 2006, 09:23 PM

Quote:

Originally posted by jleaman

I'll buy a board.

Do you really want one?

falcott · 7th December 2006, 11:14 PM

I'm interested in this too... maybe even a board as well

jleaman · 7th December 2006, 11:25 PM

Quote:

Originally posted by Kooka

Do you really want one?

1 no, 2 yes

Please..

7th December 2006, 08:48 PM	#4
billbo diyAudio Member Join Date: Nov 2006	tube preamp I have designed a line level preamp using a 12au7 and a small bunch of components. Very easy to build. If you are interested I can dig it up and post/email the schematic. Billy D...

7th December 2006, 11:14 PM	#9
falcott diyAudio Member Join Date: Jul 2004 Location: Wherever I hang my hat...	I'm interested in this too... maybe even a board as well __________________ "Everything should be made as simple as possible, but not simpler." - Einstein

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Swap Shanling CD-T80 valve CD player for Quad valve equiment	johnm	Swap Meet	2	24th September 2009 12:15 PM
Convert a non-valve amp to a Valve (tube) Amp	seanthomas46	Tubes / Valves	11	6th September 2005 09:52 PM
Treble response with FR drivers Chip vs SS vs Valve	theoracle	Chip Amps	4	3rd January 2005 09:47 AM
DIY valve amp	matthew2456	Tubes / Valves	3	14th August 2004 08:08 AM
valve pre amp	dudemyster	Tubes / Valves	4	13th April 2004 04:13 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

7th December 2006, 07:53 PM	#1
FastEddy diyAudio Member Join Date: Jun 2006 Location: North Californie	" ... I'm now interested in building a tube pre-amp to go with it if anyone has any suggestions... " Me too! Ideally a tube pre-amp with just a few of balanced or unbalanced (stereo) source inputs ... kit or ready made ...

7th December 2006, 08:57 PM	#5
FastEddy diyAudio Member Join Date: Jun 2006 Location: North Californie	Kooka & Billbo: A single channel tube pre-amp?? Using dual 12au7 for balanced input?? Noticing that Kooka's board above has provisions for three full wave bridge rectifiers ... ?? is all that required for a single channel ?? Or am I mis-reading the board layout and this is a dual channel circuit?? Anyway, I could very easily be persuaded to get enough boards and parts for two complete, two channel pre-amps (2 boards or 4?). (Oops, just spotted the double gain variable resistors indicating two channels per board.) (Also, can or should the 12ax7 be used as substitute??) Got schematics?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)