EL34 PP New Design of newbie

hien.t.nguyen · 20th February 2010, 01:58 PM

Hi all.

I am Vietnamese,My English is not so good but I like to make a amplifier EL34,this is the schematic for me,I am use tube 6J1/6AK5 - 6H8C/6NS7-EL34.

hien.t.nguyen · 02:10 PM

6J1/6AK5 can use pentode or triod by SW1,I dont know do it have good for sound?

There are power supply and PCB for 2 chanel L+R+power supply

hien.t.nguyen · 20th February 2010, 02:13 PM

>>>

hien.t.nguyen · 11th March 2010, 10:14 AM

This is PCB of EL34 PP V1

hien.t.nguyen · 11th March 2010, 10:15 AM

PCB of EL34 PP V2.

hien.t.nguyen · 11th March 2010, 11:37 AM

Sch el34 pp-v1

hien.t.nguyen · 11th March 2010, 11:38 AM

Sch el34 pp-v2

SY · 11th March 2010, 12:47 PM

Mullard 5-20. One of the classics. Your phase splitter will be unbalanced, though. A CCS for the tail will fix that, otherwise you need to unbalance the plate resistors a bit (if memory serves, 28k and 33k, but I'd double-check that).

hien.t.nguyen · 01:07 PM

Quote:

Originally Posted by SY

Mullard 5-20. One of the classics. Your phase splitter will be unbalanced, though. A CCS for the tail will fix that, otherwise you need to unbalance the plate resistors a bit (if memory serves, 28k and 33k, but I'd double-check that).

Thank mod.

That a good idea.

I not perfect my design, a VR adjust the balance current anode 6SN7,if dont so I must macthpair 6SN7

danzup · 11th March 2010, 01:10 PM

Quote:

Originally Posted by hien.t.nguyen

PCB of EL34 PP V2.

Nice PCB !
An estimate price for that ?

20th February 2010, 02:03 PM	#2
hien.t.nguyen diyAudio Member Join Date: Mar 2008 Location: Viet Nam	6J1/6AK5 can use pentode or triod by SW1,I dont know do it have good for sound? There are power supply and PCB for 2 chanel L+R+power supply Last edited by hien.t.nguyen; 20th February 2010 at 02:10 PM.

11th March 2010, 12:47 PM	#8
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Mullard 5-20. One of the classics. Your phase splitter will be unbalanced, though. A CCS for the tail will fix that, otherwise you need to unbalance the plate resistors a bit (if memory serves, 28k and 33k, but I'd double-check that). __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

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