About an hybrid LM3886 amp using 12AX7 tube

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
G

gaetan8888

Member
Joined 2007
Hello

Here is an hybrid LM3886 inspired by an ideas from the Tube Cad web site.

Which value would you suggest for the two RK resistors ?

Any suggestions or modifications ?

I include the schematics.

Thank you

Regard
 

Attachments

  • lm3886 gainclone-hybrid-2.gif
    lm3886 gainclone-hybrid-2.gif
    33.3 KB · Views: 2,089
G

gaetan8888

Member
Joined 2007
Hello

Nice schematic your 6N23P hybrid amp.

I have lot of new old stock 6N2P-EV tube from Russia, same than 12AX7 but with a different filament connexion.

So I would like to use my 6N2P-EV in a hybrid LM3886 amp.

Do my schematic are good ?

But I would need suggestion of values for RK resistors.


Thank

Bye

Gaetan
 
jazzman06

jazzman06

Member
Joined 2009
the amp is very goood !(about my schematics ,you can try it)

as i know 12ax7 and 6n23p have different characteristics and not only the filament conection is not like in 6N23P
your schematics is good too but is beter if you use 4,7u cap as input capacitor

this is my pcb for my amp
 

Attachments

  • 1.gif
    1.gif
    60.5 KB · Views: 1,824
piero7

piero7

Member
Joined 2009
jazzman06 said:
the amp is very goood !(about my schematics ,you can try it)

as i know 12ax7 and 6n23p have different characteristics and not only the filament conection is not like in 6N23P
your schematics is good too but is beter if you use 4,7u cap as input capacitor

this is my pcb for my amp
Click to expand...


Very interesting pcb, show us also the psu please
 
jazzman06

jazzman06

Member
Joined 2009
Green Marlin said:
Hi jazzman06 sorry but i don't understand the dimension of pcb.
I try at printed the pcb but at 100% is very big , at 50% the 3886
not insert in the hole, is possible have the right dimension?
You sold the pcb.
thanks for all
Sergio
Click to expand...

Green Marlin - i have attached a rar archive that contains lay file , you can open it with sprint layout v 5.0
and print it from it
 

Attachments

  • 1.zip
    54.3 KB · Views: 363
M

Mark Allen

Member
Joined 2008
flickr.com/photos/rockhound55/sets/
I'd be interested in a tube phase splitter for use in the BPA-300 amplifier. This could replace the expensive Jensen or Lundahl input transformer and or opamp input phase splitter that is necessary in this amplifier. I think a toobe would be a much better choice then either of the other routes. There are already kit amplifiers for sale from China via e-bay similar to what you guys are showing above.

Mark
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom