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Re: [Amps] RF power transistor curve trace question

Subject: Re: [Amps] RF power transistor curve trace question
From: Manfred Mornhinweg <>
Date: Tue, 16 Jun 2009 16:28:27 +0000
List-post: <">>
Hi Dan,

> The tracer is not able to drive that much current, however it is able to 
> drive one amp. At the this value the base emitter value is over .8 volt, 
> however the curve and the slope indicate it would go well over a volt.

So no surprise there. It must be ballasted, like almost all RF power 

> I will mount the TH430 on a heat sink and test it.

Yes, do that. You don't really need the curve tracer for that. Just a 
single point measurement, done with a power supply, an amperemeter, a 
voltmeter (or a multimeter with both functions), and a small selection 
of resistors, will do.


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