How the LA-2A Output Stage is a Double Follower?

[opacheco]

Hi again,

I readed in:
http://www.jblproservice.com/pdf/Vintage%20JBL-UREI%20Electronics/UREI-LA-2A%20manual.pdf, Circuit Description, Page 4;

"The Output Stage is somewhat unconventional in that a totem pole or double cathode follower is used......."

What mean that?.....I figured the schematic by inspection and found a rare output circuit topology, look likes the lower triode(see the last page for schematic please) provide DC stabilizacion for the DC voltage of the catode of the upper triode, but how the lower triode is polarizated?......How this a double follower circuit?

Any comment will be appreciated!
Opacheco

 

[opacheco]

Here there is some Light

http://books.google.com/books?id=y0d9VA0lkogC&pg=PA252&lpg=PA252&dq=Double+Cathode+Follower&source=bl&ots=AQma6Ig3sK&sig=WMQwupJc4oHpJdJI7CofaWVItiI&hl=en&ei=EbXxTbD3DMKx0AHj_4iVBA&sa=X&oi=book_result&ct=result&resnum=7&ved=0CEsQ6AEwBg#v=onepage&q=Double%20Cathode%20Follower&f=false

Opacheco.

 

[opacheco]

well, look like I will have to change the question!!....

Where I can find a detail description of the "DOUBLE CATHODE FOLLOWER??"

Thanks
Opacheco.

 

[ruffrecords]

Looking at the circuit you linked to, the output stage looks like a White Follower to me. Google is your friend.

Cheers

Ian

 

[opacheco]

Looking at the circuit you linked to, the output stage looks like a White Follower to me. Google is your friend.

Cheers

Ian

Ian,
Thanks .

 

[opacheco]

I did follow the advice of Ian and found a interesting notes about the similars Cathodes Circuits.....

White Cathode Follower
Broskie Cathode Follower

http://www.tubecad.com/october99/

I will need to do similar circuits analysis in order to research for the LA-2A Output Stage Double Follower, for its performance and behavior.

Ian, thanks again!
Opacheco.