e-Amp

[Bonsai]

My new power amp ('e-Amp') is coming along quite well. The main boards power amp boards have been assembled and the protection and in-rush board has had the s/ware written and debugged. Still a lot of work to do, but it will probably be up and running in about 3 weeks. I'll post circuits, more pictures and a full write-up once testing is complete. There is a very small write up on my website below in the interim.

🙂

 

[Bonsai]

BTW, compensation is selectable using jumpers for either standard MC, TMC, or a hybrid comp scheme I've called WB-TMC.

 

[wahab]

Looks neat....

Apparently , a symetrical differential design.....That s great if true. 🙂
Those are very rare.

 

[Bonsai]

Thanks Wahab!

Yes, symmetrical differential design and EF3 - my preferred topology!

🙂

 

[U102324]

We do share some layout ideas Bonzai, this is ELD prototyped Oct 2010. Also dual symmetrical and uses 2SK1058/2SJ162 driving 3 pairs of MJL3821A/1302A.

Front end runs off a voltage doubler and shunt regulated to ±70V while the main amp runs from ±48V.

 

[Bonsai]

Very nice Nico - yes, I like this layout as well - great for spreading the heat and clamping the devices to the h/sink.

This e-Amp is running off +-73V (actually a bit on th high side, but it can live with it) and I am using a ripple eater on the pos and neg supplies to the front end.

I have a 50 odd page write -up I'll stick up on my site once the nit is assembled and tested - still need a few more weeks though.

 

[Walkalone]

@Bonsai: Look very good! I'm very interested.
Can you show the schematic and spec? (THD, Slew rate, BW... ect...?)

 

[Tekko]

That look just too professional to be homemade!!

You sure u arent rebuilding a commercial amp ? 😀

 

[Bonsai]

Ha ha. Lol

No, the boards are made by a PCB house, but everything else is home made. I even file th holes in h chassis. This week end maybe it is wired up completely!

 

[Bonsai]

Walk lone, yes, when I have finished the listening tests in. Few weeks I will publish something.