Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Colas LeGrippa on June 09, 2014, 01:23:38 pm

Title: Anatomy of an EL34
Post by: Colas LeGrippa on June 09, 2014, 01:23:38 pm

here.s some pics of a JJ EL 34 showing clearly the glas envelope, cathode ( by the watch ) control grid screen grid and suppressor grid tied to the getter ( the ring ) and finally the plate. All those components are inserted  in the plate so that the flow of electrons could leave the cathode , cross the 3 grids  and  arrive to the plate. When you look at a power tube, you only see the plate. BTW, don't try taking off a hot tube with a wet towel unless you want to study the anatomy of a tube.

Colas

Title: Re: Anatomy of an EL34
Post by: Colas LeGrippa on June 09, 2014, 01:32:27 pm

read this interesting article on how tubes work.


http://mesaboogie.com/US/Smith/ClassA-WebVersion.htm (http://mesaboogie.com/US/Smith/ClassA-WebVersion.htm)

Title: Re: Anatomy of an EL34
Post by: kagliostro on June 09, 2014, 03:30:33 pm

Ciao Colas

Very good stuff, thanks for posting

I like this part very much  :grin:

(http://mesaboogie.com/US/Smith/class_A-images/NEW-OnLineIMAGES/Figure11-faucet.gif)

Franco

Title: Re: Anatomy of an EL34
Post by: Colas LeGrippa on June 09, 2014, 04:11:49 pm

Ciao Franco !