Sjöström Audio DIY forum

Projects => Headphone amplifiers => Topic started by: Digora on February 21, 2008, 08:29:53 PM

Title: QRV06 topologie for power amplifier
Post by: Digora on February 21, 2008, 08:29:53 PM
heaveno,

Do you have try the topologie of the QRV06 headphone amp for power amplifier ?

I am  very interested with this topologie but maybe with differential input like the figure 13 on this document find in your site :

http://www.utdallas.edu/~heavenums/docs/JournalPapers/SmithCFBamp.pdf

(http://img168.imageshack.us/img168/6449/diamondpowerav6.th.png) (http://img168.imageshack.us/my.php?image=diamondpowerav6.png)

Thanks :)
Title: Re: QRV06 topologie for power amplifier
Post by: peranders on February 21, 2008, 08:35:11 PM
Sorry, but a danish guy has made a very fine current feedback POWER amplifier with a similar design as my QRV06/08

Sonny Andersen had his web site here http://mirand.dk/ but I don't know what happend to it. Send me an email if you want the pdf of the amp.
Title: Re: QRV06 topologie for power amplifier
Post by: Digora on February 21, 2008, 09:14:21 PM
Thanks to your answer

The web site does not responding ...

Yes I would like the schematic pdf :)

I have sennheiser HD555 headphone, can I use the QRV08 ?  how can I buy it and How is the kit ?

Title: Re: QRV06 topologie for power amplifier
Post by: peranders on February 21, 2008, 09:24:05 PM
I sell only the pcb, no parts. The amp will work beautifully with any headphone.
Title: Re: QRV06 topologie for power amplifier
Post by: Digora on February 21, 2008, 09:34:26 PM
SMD is not easy to build...

No version with BC550 560 ?   

Title: Re: QRV06 topologie for power amplifier
Post by: peranders on February 22, 2008, 08:30:12 AM
I'm afraid not.
Title: Re: QRV06 topologie for power amplifier
Post by: Digora on February 22, 2008, 11:26:38 AM
ok

is it possible to use your schematic for BC550 and ... BC139 or MJE15030 ?

Title: Re: QRV06 topologie for power amplifier
Post by: peranders on February 22, 2008, 02:02:35 PM
You can use just about any transistor type. It's not very critical.
Title: Re: QRV06 topologie for power amplifier
Post by: Digora on February 24, 2008, 01:15:55 PM
your schematic look like  super linear circuit

http://www.audiodesignguide.com/Headphone_amp/headphoneamp.html

but the mirror is not on the input
Title: Re: QRV06 topologie for power amplifier
Post by: peranders on March 04, 2008, 12:35:03 PM
Sorry, but I must disagree....