Post your Solid State pics here

[fredbloggstwo]

 

[Bensen]

Blowtorch preamp clone on the way

My first version of this legendary preamp came to life today.
Still have to perform some bias tweaking of the input Jfet's and output Mosfets. (2SK389BL/2SJ109BL and 2SK2013 + 2SJ313)

Compared with my PS audio preamp and my Calvin buffers, I have a very very good feeling about of this one. I'm only listening mono sofar and will not build a stereo version of this one, that will be for the final design and PCB's.
The heatsinks on the regulator PCB are to small, temp is 50°C above ambient!

 

[pinnocchio]

Very interesting Benson!

Looking forward to your final impression of this preamp!

Do

 

[VeGaATS]

PreAMP
After buying and being dissapointed by a few commercial preamps (a NAD C165BEE, a Cambridge Audio CXN V2, and an Onkyo A-9070) I decided to design and build my own stereo preamp.

 

[diyralf]

just dreaming..

 

[thimios]

Excellent!!!
Congratulations.

 

[VeGaATS]

Thank you, diyralf and thimios!

I think it looks a bit like the old Sansui design, except the side panels maybe.

Best,
VG

 

[mhouston]

PreAMP
After buying and being dissapointed by a few commercial preamps (a NAD C165BEE, a Cambridge Audio CXN V2, and an Onkyo A-9070) I decided to design and build my own stereo preamp.

Looks pro.

 

[fotios]

PreAMP
After buying and being dissapointed by a few commercial preamps (a NAD C165BEE, a Cambridge Audio CXN V2, and an Onkyo A-9070) I decided to design and build my own stereo preamp.

Speechless... Bravo VG!

 

[VeGaATS]

Thanks, fotios!

Best,
VG

 

[VeGaATS]

Looks pro.

Thanks, mhouston!
…and sounds as it should.
Best,
VG

 

[smartx21]

VG, what's the main preamp around?

 

[VeGaATS]

OPA1656... and in direct mode it's only one per channel, two with the tone control activated.

Best,
VG

 

[VeGaATS]

...actually three all together with tone control.

VG

 

[smartx21]

Nice. Thanks.

 

[diyralf]

PreAMP
I decided to design and build my own stereo preamp.

Have you machined the parts of the case yourself? Are the side panels made of wood?

 

[VeGaATS]

I designed the front and back panels, the two aluminum side frames, and the top and bottom of the enclosure using FrontPanelDesigner, then FrontPanelExpress made them for me. The two light gray side panels are plastic (King Starboard). I made the drawing and TAP Plastics cut them.

VG

 

[zman01]

VG,

Beautiful build, congratulations!

 

[VeGaATS]

Thanks, zman01!

 

[fotios]

PreAMP
After buying and being dissapointed by a few commercial preamps (a NAD C165BEE, a Cambridge Audio CXN V2, and an Onkyo A-9070) I decided to design and build my own stereo preamp.

Very nice right angle pcb mount phono sockets on input board. I also like the OMRON input relays, are latching type? Very nice Block C-core xformers. What type are the voltage regulators? Is your own design the remote control? Very good choice the OPA1656. The big 2X100KA Alps mot pot hasn't problem with ICs. In general, your preamp is an excellent project. Bravo again.