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Old 25th March 2011, 03:21 PM   #1
Jay is offline Jay  Indonesia
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Default How to parallel P3A output transistor?

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

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Old 25th March 2011, 06:16 PM   #2
jaycee is offline jaycee  United Kingdom
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0.1 ohm 3W resistors in the emitters of both pairs.
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Old 25th March 2011, 06:32 PM   #3
Bone is offline Bone  United Kingdom
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Look at Rod's P27 power amplifier.
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Old 25th March 2011, 07:16 PM   #4
lineup is offline lineup  Sweden
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Click the image to open in full size.
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Old 26th March 2011, 12:56 AM   #5
Jay is offline Jay  Indonesia
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Like this? Or?

Will there any increase in power?
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Old 26th March 2011, 03:04 AM   #6
ReiMomo is offline ReiMomo  Puerto Rico
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R13s goes to emitter side.
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Old 26th March 2011, 07:08 AM   #7
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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 It might make it easy to teach with the full, unpublished diagrams and make it easy for cloners but it's his business and not your IP.
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Old 26th March 2011, 08:13 AM   #8
lineup is offline lineup  Sweden
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I think he is glad anyone is interested in his his amplifiers.
Image is just a link to his site.
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Old 26th March 2011, 08:48 AM   #9
lineup is offline lineup  Sweden
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Quote:
Originally Posted by Jay View Post
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Will there any increase in power?
You have confused emitter and collector.
Best use 0.470 or 0.330 Ohm
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Old 26th March 2011, 10:15 AM   #10
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Apologies guys, you are right Lineup, as Rod now shows part values on his designs.
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