How to parallel P3A output transistor?

[Jay]

I'm using small package transistors for my P3A, and I want to add another pair. How can I parallel these transistors?

Thanks

 

[jaycee]

0.1 ohm 3W resistors in the emitters of both pairs.

 

[Bone]

Look at Rod's P27 power amplifier.

 

[lineup]

An externally hosted image should be here but it was not working when we last tested it.

 

[Jay]

Like this? Or?

Will there any increase in power?

 

[ReiMomo]

R13s goes to emitter side.

 

[Ian Finch]

Guys, you are all but publishing Rod's schematics here. It might make it easy to teach with the full, unpublished diagrams and make it easy for cloners but it's his business and not your IP.

 

[lineup]

I think he is glad anyone is interested in his his amplifiers.
Image is just a link to his site.

 

[lineup]

Like this? Or?

Will there any increase in power?

You have confused emitter and collector.
Best use 0.470 or 0.330 Ohm

 

[Ian Finch]

Apologies guys, you are right Lineup, as Rod now shows part values on his designs.

 

[AndrewT]

Ask ESP for permission to post his schematics.

Previously he has made it clear that we Members can post links to articles and diagrams on his site, but that copies of his IP should not be posted elsewhere.
He also requests that customers do not publish the details of the retail product.

Line up,
You are breaking Forum Rules.

You're post is reported.

 

[grappay]

Like this? Or?

Will there any increase in power?

Q7 and Q8 on emitter side value 220~330 milli ohm right?

 

[JMFahey]

I think he is glad anyone is interested in his his amplifiers.

"Interested" as in *buying* from him? Quite sure about that.
"Interested" as in : "everybody knows me but I don't make a cent out of it" ?
Mmmmmhhhhh, not so sure about that.