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Old 7th December 2006, 08:53 PM   #1
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" ... 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 ...
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Old 7th December 2006, 09:22 PM   #2
Kooka is offline Kooka  Italy
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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?
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Old 7th December 2006, 09:37 PM   #3
jleaman is offline jleaman  Belgium
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Quote:
Originally posted by Kooka


What about this?

I'll buy a board.
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Old 7th December 2006, 09:48 PM   #4
billbo is offline billbo  Australia
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Default 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...
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Old 7th December 2006, 09:57 PM   #5
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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?

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Old 7th December 2006, 09:59 PM   #6
Seabass is offline Seabass  Scotland
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Quote:
Originally posted by Kooka


What about this?

What is this amp?? More details please!!

Cheers
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Old 7th December 2006, 10:22 PM   #7
Kooka is offline Kooka  Italy
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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.
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Old 7th December 2006, 10:23 PM   #8
Kooka is offline Kooka  Italy
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Quote:
Originally posted by jleaman



I'll buy a board.
Do you really want one?
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Old 8th December 2006, 12:14 AM   #9
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I'm interested in this too... maybe even a board as well
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Old 8th December 2006, 12:25 AM   #10
jleaman is offline jleaman  Belgium
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Quote:
Originally posted by Kooka


Do you really want one?

1 no, 2 yes Please..
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