Cornet2 Tube Phono PreAmp -Completed

[acceler8]

Here are some pictures of my recently completed Cornet2. This is my first tube project, and I am quite happy with the results. I can truly see how the DIY bug can bite! I've also built the Part's Express Tri-Trix speakers and a Peter Daniels chip amp.

The stuffed board (just about complete). I used the recommended AuriCap upgrades.


In the chassis. I'm so glad I went with a larger footprint.


Transformer wiring (medium neat)


Finished Case.


Test signal from cheap laptop sound card.


The square wave is noisy, but the Cornet is very accurate! Signal Input is on top trace, and output (through a home grown reverse RIAA network) is on bottom.


My messy bench.


I've been listening to this beauty for about a month. I just recently built a reverse RIAA magic box to allow me to test it.

I do have one question. In the manual, the section on testing shows the 'Residual Distortion' on an oscilloscope. Does anyone know how to measure that?

[kevinkr]

Nicely executed project. The cornet is a good sounding phono pre IMLE..

The residual distortion displayed in the scope shot was probably the notch filter output on an analog distortion analyzer.

I think a sound card based FFT analyzer is both easier to interpret and provides a lot more data. (Plenty of threads on that subject.)

[Bonsai]

Yes, I agree this looks like a nicely put together project.

Nice looking scope BTW!