6SN7 [headphone] amp

I just uploaded this 720mW per channel amp project in my blog.



It's a transformer coupled parallel single ended 6SN7 with a cap coupled 6CG7 input/driver. The square waves and numbers aren't great but I've been having fun with my headphones using this amp since the start of the 2020 lockdown.



Here's a short clip of the amp recorded using an iPhone 6S driving my recently restored Snell JIIIs.

 

I can empathize with your attraction to the 6SN7, it has the characteristics of big triodes without the raw power (which is why I like hybrids )

And nicely done!

 

Thanks!

You captured the essence of my DIY audio journey which is similar to violinists talking shop about the subtle difference between a darker Guarneri del Gesu vs. the more brilliant golden period Strads or record engineers discussing what glue to add in their final mix.

 

J, you actually inspired me previously to attempt an all tube build and I am making slow progress on this humble circuit

 

That's a very interesting PP EL84 circuit! I've never seen it before and have no hands on experience with the ECC803s hi-mu (?) triode. But the very first amp I built from scratch is the Dynaco circuit below.



I used 6SL7s > 6V6s > Z565 OPTs (Dyna SCA/ST35). It was a very fine sounding amp driving LS3/5As and ESL57s.

The circuit you posted is a similar topology. I think it'll sound just as good or even better. Looking forward to your posts on that amp project!