2 different trannies for a darlington

[jogina111]

is it possible to use 2 different transistors to make a darlington pair? Im building a metal simplex but with more gain by using a darlington pair.. but I only got 1x 2n3904, 1x s8050 and 1x c9014..

[LucifersTrip]

yes, as long as both are npn or pnp

if you have one of each, then:

[armdnrdy]

I found this in a Wiki.

Darlington pairs are available as integrated packages or can be made from two discrete transistors; Q1 (the left-hand transistor in the diagram) can be a low power type, but normally Q2 (on the right) will need to be high power. The maximum collector current IC(max) of the pair is that of Q2.

[armdnrdy]

yes, as long as both are npn or pnp

if you have one of each, then:

I think that diagram is a complementary darlington. A regular darlington is either NPN or PNP.

[jogina111]

is the 2n3904 more high powered than the c9014?which one should be on the 1st stage of the darlington pair?

[armdnrdy]

According to the Wiki, Q1 is the one on the left (low power) and Q2 is the one on the right. (high power) I'd say give it a try! The worst thing that will happen is a puff of smoke.

[LucifersTrip]

yes, as long as both are npn or pnp

if you have one of each, then:

I think that diagram is a complementary darlington.

It's also called a Sziklai pair

A regular darlington is either NPN or PNP.

that's what I wrote above

[reveal]

Small Bear has an article on darlingtons.  It's geared towards germanium but the concept is the same for silicon.  https://www.smallbearelec.com/HowTos/GeDarlingtons/GeDarlingtonPairs.htm

[Heemis]

A regular darlington is either NPN or PNP.

that's what I wrote above

The graphic you posted is an NPN and PNP, that's why he said that.

[LucifersTrip]

A regular darlington is either NPN or PNP.

that's what I wrote above

The graphic you posted is an NPN and PNP, that's why he said that.

I wrote "if you have one of each, then:"
[graphic]

[armdnrdy]

Let's not argue boys!

I pointed out that the image depicted was not a regular darlington pair not to prove anyone wrong (I saw your comment "a regular darlington is either NPN or PNP) but to make sure that jogina111 had it straight.

All friends now? 

[LucifersTrip]

yes, as long as both are npn or pnp. Darlington:



if you have one of each, then it's a Sziklai pair (or complementary Darlington):

[armdnrdy]

Okay, but can he use two diffent transistors to make a darlington pair? 

[LucifersTrip]

Okay, but can he use two diffent transistors to make a darlington pair?  

"yes, as long as both are npn or pnp"

http://www.diystompboxes.com/smfforum/index.php?topic=99425.msg872034#msg872034

[armdnrdy]

Good answer!!

You know....jogina111 probably went out and bought a 2N5306 and called it good!!

[jogina111]

nah, cant even find one of those in my local stores....