Tube-Mosfet Single-Ended Amplifier!

Matthewong · 5th September 2008, 10:37 AM

This is the first hybrid amplifier I want to build, but the problem is I found a few errors on the schematic (my friend give me), I hope that every expert out there can give me some idea and help me to correct this schematic..

darkfenriz · 6th September 2008, 09:32 AM

What are the errors?
Looks correct to me.

commstech · 6th September 2008, 09:58 AM

i am sure this is not your friend's design. the PCB is sold commercially by a member here, why bother to erase the owner's website on the schematic?. if there is any errors, please do share and i am sure the seller would be interested to know.

oh btw, his nick here is kristijan-k.

sith · 6th September 2008, 06:52 PM

More specific, Mr.Pass design it would be (omg I'm Yoda

)

Anyway, here's link on Kristian's page... so there's no need to be mysterious about schematics or designer....

http://www.kk-pcb.com/vpzen.html

Matthewong · 7th September 2008, 04:27 PM

Thanks for the website because I only got this schematic from my friend and I have no idea why he has erased all the schematic information. Btw, isn't it the tube part has error? I can't understand that part at all.

sith · 7th September 2008, 05:57 PM

not sure on what part you are referring, still, try on Pass section of this forum, maybe you'll find all the answers u need

nikwal · 7th September 2008, 06:03 PM

To me' if using the tubes like that. I'd rather do a mu-follower with a mosfet on the anode and a simple follower stage with mosfets. Or just go with a ZEN-X for example :-D..

or search the internet for other hybrid designs, there are some interresting out there.. :-D one with lundahl transformers connected to the gates, I wonder how good that one works,looks cool and really minimalistic though..

lineup · 7th September 2008, 06:10 PM

Quote:

Originally posted by sith
Anyway, here's link on Kristian's page... so there's no need to be mysterious about schematics or designer....
http://www.kk-pcb.com/vpzen.html

and here is the pcb board components lay out
with 1 tube + mosfets

Matthewong · 8th September 2008, 03:14 PM

I not really understand why got 2 connection to the grid for the e88cc tube.

commstech · 18th September 2008, 05:03 PM

Quote:

Originally posted by Matthewong
I not really understand why got 2 connection to the grid for the e88cc tube.

so what is so wrong about the balanced inputs at the tube stage? u have to elaborate if u ask for help.

6th September 2008, 06:52 PM	#4
sith diyAudio Member Join Date: Nov 2003 Location: Split	More specific, Mr.Pass design it would be (omg I'm Yoda ) Anyway, here's link on Kristian's page... so there's no need to be mysterious about schematics or designer.... http://www.kk-pcb.com/vpzen.html __________________ There is no spoon...there is a fork!!!

7th September 2008, 05:57 PM	#6
sith diyAudio Member Join Date: Nov 2003 Location: Split	not sure on what part you are referring, still, try on Pass section of this forum, maybe you'll find all the answers u need __________________ There is no spoon...there is a fork!!!

7th September 2008, 06:03 PM	#7
nikwal diyAudio Member Join Date: Aug 2005	To me' if using the tubes like that. I'd rather do a mu-follower with a mosfet on the anode and a simple follower stage with mosfets. Or just go with a ZEN-X for example :-D.. or search the internet for other hybrid designs, there are some interresting out there.. :-D one with lundahl transformers connected to the gates, I wonder how good that one works,looks cool and really minimalistic though.. __________________ http://dsl.mine.nu (very enironmental friendly 5watt damn small linux server made from a compaq t1010 terminal)..

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6th September 2008, 09:32 AM	#2
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	What are the errors? Looks correct to me.

6th September 2008, 09:58 AM	#3
commstech diyAudio Member Join Date: Oct 2002 Location: SINGAPORE	i am sure this is not your friend's design. the PCB is sold commercially by a member here, why bother to erase the owner's website on the schematic?. if there is any errors, please do share and i am sure the seller would be interested to know. oh btw, his nick here is kristijan-k.

7th September 2008, 04:27 PM	#5
Matthewong diyAudio Member Join Date: Jun 2005 Location: KL	Thanks for the website because I only got this schematic from my friend and I have no idea why he has erased all the schematic information. Btw, isn't it the tube part has error? I can't understand that part at all.

8th September 2008, 03:14 PM	#9
Matthewong diyAudio Member Join Date: Jun 2005 Location: KL	I not really understand why got 2 connection to the grid for the e88cc tube.

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