Sjöström Audio DIY forum

Projects => Phono RIAA amplifiers => Topic started by: gianluca on August 30, 2007, 04:29:02 PM

Title: QSXM2 doubt
Post by: gianluca on August 30, 2007, 04:29:02 PM
I'm not shure of the normality of the hottest of the four battery of transistors T31-T33-T35, T32-T34-T36 (the same for the V of the right channel) on my QSXM2.

Someone can answer me?!

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Title: Re: QSXM2 doubt
Post by: peranders on August 30, 2007, 07:50:23 PM
Those transistors runs in class A and will become rather hot. Nothing to worry about.
Title: Re: QSXM2 doubt
Post by: gianluca on August 30, 2007, 10:18:52 PM
Perfect!
Title: Re: QSXM2 doubt
Post by: goldkenn on October 28, 2009, 06:59:11 AM
Due to heat, should I use normal type transistor rather then SMD type?
Title: Re: QSXM2 doubt
Post by: peranders on October 28, 2009, 08:33:34 AM
I haven't tested SOT23's but I'm pretty sure they will work despite the heat but if you already have the BC5xx use them.
Title: Re: QSXM2 doubt
Post by: goldkenn on October 28, 2009, 10:40:41 AM
I have ordered both BC5xx and BC8xx?maybe I test the BC8xx first, since SMD type is always more easy to desolder then through hole type.

By the way, as being the final output pair, I should suppose do the same on T55/T56, right?
Title: Re: QSXM2 doubt
Post by: peranders on October 28, 2009, 11:28:10 AM
Yes.