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 Forum index » DIY Hardware and Software » YuSynth
BC547C or BC547B does it matter?
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koenpepping



Joined: Jun 25, 2014
Posts: 8
Location: utrecht NL

PostPosted: Thu Jun 26, 2014 6:58 am    Post subject: BC547C or BC547B does it matter? Reply with quote  Mark this post and the followings unread

Hi,

I noticed yusynth modules use a lot of BC547C transistors, and I have a lot of BC547B transistors.

can I use the B's in stead of C's? does it really matter? and if i can, can I use them for the matched pairs as well?

Thanks!
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Blue Hell
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Joined: Apr 03, 2004
Posts: 20510
Location: The Netherlands, Enschede
Audio files: 147
G2 patch files: 318

PostPosted: Thu Jun 26, 2014 9:08 am    Post subject: Reply with quote  Mark this post and the followings unread

the C types have a higher Hfe than the B types, and usually when C is specified explicitly it is for that reason ... it would need some examination of the circuit to decide if such really is the case, but I'd trust Yves here.
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koenpepping



Joined: Jun 25, 2014
Posts: 8
Location: utrecht NL

PostPosted: Tue Jul 08, 2014 3:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

Blue Hell wrote:
the C types have a higher Hfe than the B types, and usually when C is specified explicitly it is for that reason ... it would need some examination of the circuit to decide if such really is the case, but I'd trust Yves here.


Thanks Jan!

It's exactly the answer I was hoping not to hear.. but I expected this answer.. I will focus on finding cheap C types! thanks again Smile
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bubzy



Joined: Oct 27, 2010
Posts: 551
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PostPosted: Tue Jul 08, 2014 11:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

Funnily enough, I fell for this too. and with a yusynth module(I think it was an adsr). spent a hell of a long time troubleshooting the circuit and wondering why it wouldn't perform, and it was that I had used the wrong transistor type :/ all the best with getting hold of some, I think I bought mine on ebay! Very Happy
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