I search schematic of tube preamplifier for this amplifier.
http://mycaramplifiers.com/wp-content/uploads/2009/01/mosfet-amplifier.jpg
http://mycaramplifiers.com/wp-content/uploads/2009/01/mosfet-amplifier.jpg
to supply this amplifier
http://mycaramplifiers.com/wp-content/uploads/2009/01/mosfet-amplifier.jpg
Not for car.
i want with tubes.
This preamplifier is good?
http://diyaudioprojects.com/Tubes/12AX7_Preamp/F01schematic.jpg
http://mycaramplifiers.com/wp-content/uploads/2009/01/mosfet-amplifier.jpg
Not for car.
i want with tubes.
This preamplifier is good?
http://diyaudioprojects.com/Tubes/12AX7_Preamp/F01schematic.jpg
This preamplifier is good?
http://diyaudioprojects.com/Tubes/12AX7_Preamp/F01schematic.jpg
No, not so good. It has poorly chosen tubes, lots of feedback that is only there because of the poorly chosen tubes, multiple signal line capacitors, and high output impedance.
For a good line preamplifier consider the Aikido design from TubeCad:
John Broskie's Guide to Tube Circuit Analysis & Design
Aikido All in One
This preamplifier is good?
http://diyaudioprojects.com/Tubes/12AX7_Preamp/F01schematic.jpg
Yes.
I'm with Gordy on this.
Me too.. Early on I designed a generally similar circuit and found it sonically inferior to just about anything you could imagine..
Still other options to those listed above could include a simple amplifier stage using half of an ECC99 or 5687 per channel for a gain of around 22dB or so and fairly low source impedance with no fdbk.
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Me too.. Early on I designed a generally similar circuit and found it sonically inferior to just about anything you could imagine..
Still other options to those listed above could include a simple amplifier stage using half of an ECC99 or 5687 per channel for a gain of around 22dB or so and fairly low source impedance with no fdbk.
That means, the Devil is in details, and the same cat may be skinned by multiple ways.
Generally similar circuit (2 stage amp with serial feedback by voltage) was used in one of my first hybrid amps. The sound was unbelievable real.
Here is the driver schematic (I found it in my very old papers) attached.
Attachments
here's the issue though guys - we are looking for a pre- for a very specific application. It would appear that it actually doesn't need gain since it has line level input, but has to drve and unknown load.
Kinda makes amplifying stages a non-issue surely. If ever there was a case for a passive pre or perhaps a CF buffer set-up this would be it...
Kinda makes amplifying stages a non-issue surely. If ever there was a case for a passive pre or perhaps a CF buffer set-up this would be it...
here's the issue though guys - we are looking for a pre- for a very specific application. It would appear that it actually doesn't need gain since it has line level input, but has to drve and unknown load.
Kinda makes amplifying stages a non-issue surely. If ever there was a case for a passive pre or perhaps a CF buffer set-up this would be it...
In such case may I recommend similar stages? I used my SS-only version in my Tower-II amps (now in Tower-V) to drive heavy to drive 100W speakers, it sounds gorgeous!
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yep - I think thats more what he's looking for. Hard ot know, since the op has not commented!
I assume that the RC network sets a frequency filter at the inputs and the pre-amp is a part of a bi-or tri- amp system??
It is a Sallen-Key filter made around beautiful voltage followers.
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