Schematic To Classee DR3-VHC

[ppl]

Can anyone hear supply me with a schematic to the Classee DR3-VHC Class A power Amp. I contacted Classee and got the folling reply.

Request>
Could you email me a copy of the Schematic to my DR3-VHC Class A power Amp Ser # 8700219 Thanks

Reply>
Hello Philip,

I am sorry but we do not release schematics.



Armin Gschwendtner

Customer Service Manager

Classe Audio Inc.

(514) 636-6384

cservice@classeaudio.com

 

[Tube_Dude]

Hi PPL

http://www.pi.infn.it/~federico/further.htm

regards

 

[ppl]

Tube_Dude. You Rock Thanks alot, BTW i dont see how this design is so unique that the manufacture would not give its owners needed service data. I went throught this once before prior to the internet and it left a real bad taste in my mouth with regards to manufactures that have this closed door attatude.

 

[Tube_Dude]

i dont see how this design is so unique that the manufacture ....

Hi PPL

Maybe the manufacturer believe that "this design" is unique!!

Maybe the manufacturer is like the husband...the last one to know..😉

Cheers

 

[rehad]

Hi Tube_Dude,

I can see that you can find schematics for The Classe DR3 can you also help for finding the schematic for Classe Seventy Power Amp.

Thanks

Regards

 

[Zero Cool]

I emailed the US rep and they sent me the schematics for a DR-15 no problem!


Zc

 

[carlmart]

http://www.pi.infn.it/~federico/further.htm

Interesting site with interesting amplifiers to have a look at. What do you use to open ps files?


Carlos

 

[jacco vermeulen]

Adobe converts it to pdf when you open a postscript file.

 

[rehad]

Hi,

For opening these postscripts you need to download Gsview 4.8 and GPL Ghostscript 8.54 . It is in the web site of Wisconsin computer sciences university : url : http://www.cs.wisc.edu/~ghost/index.htm

Regards

By the way i have started discovering the Classe Seventy Power amp using a multimeter and a scope . Whenever i finish i will make it available to public
🙂

 

[head_spaz]

Paint Shop Pro will open PS files too.
When opening... it gives you options to set the resolution (DPI), transparency on/off background, landscape and antialiasing.
Open it with 300 DPI, no transparency and it looks pretty damn good!

 

[destroyer X]

Well exercise testic are considered good food by some

hehe... you're funny Head spaz.

regards

Carlos

 

[Greg Erskine]

Is that pepper or salt?

 

[rehad]

Classe Audio Seventy Output Schematic

Hi,

I have explored the Classe Audio Seventy and I have found the darlington transistor 2n6426 was malfunctioning. I couldn't find the 2n6426 in the local electronic shops so i have replaced it with the similar transistor BC517. It is now working well . I have adjusted the bias resistor for an idle current of 150 mA . I am not sure about this setup but i think it's not bad.

Has anyone have an idea about the idle current of Classe Seventy ?

Below is the output stage schematic of Classe Audio Seventy that i did explored with a multimeter.

Thanks
Reha

 

[Zero Cool]

I have no idea if this helps or not, but my DR-15 schematic list's the BIAS at 74ma per device!


Zc

 

[rehad]

Actually i did the 150 mA bias setup by measuring the current on the +47 Volt power rail . I have tested the amp 4 hours continuous . The output heatsink was near 40 degree . The MJE340 and MJE350 was about 70 degree . May be the 150 mA a little bit high

 

[posxia]

Can someone kindly tell me why most CLASSE AMP,such as DR3 \ Dr9 adj the bias current by NPN Darlington transistor ? not use general npn bjt such as MJE340 , MPS8099 usually?
thx!😕