Triode Connected EL34
Alex Deveza
operation.
One says the screen is connected to the anode via a 100ohm resistors and
the suppressor directly connected to the cathode.
The other says both screen and the suppressor grids are connected to the
anode, each with 100ohm resistors.
Both of these will probably work, but what is basically the difference
between
these two? Are there any advantages or drawbacks between these two
topologies?
Thanks in Advance,
Alex Deveza
TubeGarden
>between these two?
Yup. Try both and pick the one which sounds better in your system.
Hapy Ears!
Al B^}
Alan J. Marcy
Phoenix, AZ
PWC/mystic/Earhead
Eugeni Vasilchenko
Alex Deveza wrote:
>
> I have two books that differs in the way they wire EL34 for triode
> operation.
>
> One says the screen is connected to the anode via a 100ohm resistors and
> the suppressor directly connected to the cathode.
>
> The other says both screen and the suppressor grids are connected to the
> anode, each with 100ohm resistors.
>
> Both of these will probably work, but what is basically the difference
> between
There are different S and internal resistance in different ways of
connection.
Second way will get about 700-800 Ohm vs 900-1000 for the first one.
> these two? Are there any advantages or drawbacks between these two
> topologies?
I *think* differences would take place coze diff. Ri -> diff.
Freq.response with the same tranny.
PS I use to connect third grid direct to plate.
--
Good something,
Eugeni mailto:acl...@mail.ru
Ned Carlson
> Both of these will probably work, but what is basically the difference
> between
> topologies?
Further to Mr Valischenko's comments, I'd note that if you
use the second method,(supressor connected to plate) do not
try swapping with 6550's while connected like this as on a 6550,
pin 1 (the suppressor pin on an EL34)is connected the metal
base shell! Ouch!
--
Ned Carlson Triode Electronics "where da tubes are!"
2225 W Roscoe Chicago, IL, 60618 USA
ph 773-871-7459 fax 773-871-7938
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http://www.triodeel.com
Skipp says hello and comments
: I have two books that differs in the way they wire EL34 for triode
: operation.
Two books that say different things..? Nah.... your kidding.
: One says the screen is connected to the anode via a 100ohm resistors and
: the suppressor directly connected to the cathode.
Ok
: The other says both screen and the suppressor grids are connected to the
: anode, each with 100ohm resistors.
Wow...
: Both of these will probably work, but what is basically the difference
: between
: these two? Are there any advantages or drawbacks between these two
: topologies?
Consider the fact that the grid(s) tied to the anode will have a current
flow. That current flow means power/heat. Look at the specs for the
grids, you'll find the suppressor grid probably won't like power much at
all and may go away under certain signal conditions.
My opinion would be to leave it tied to the cathode.
: Thanks in Advance,
: Alex Deveza
cheers and good luck
sk...@pilot.ucdavis.edu
Eugeni Vasilchenko
Hi.
Skipp says hello and comments wrote:
> : Both of these will probably work, but what is basically the difference
> : between
> : these two? Are there any advantages or drawbacks between these two
> : topologies?
>
> Consider the fact that the grid(s) tied to the anode will have a current
> flow. That current flow means power/heat. Look at the specs for the
> grids, you'll find the suppressor grid probably won't like power much at
> all and may go away under certain signal conditions.
>
> My opinion would be to leave it tied to the cathode.
I've made some surgery before.
Supressor made of *the same* wire and have 2-3 times less turns.
When I opened my EL, I thought about max B+ in triode mode rather
power dissipation.
Is my English undersandible?