I've built several diamond buffers with BC550/560 and BD137/138, basically the same as you use, but with JFETs or resistors as current sources/sinks. I think the DB sound is very transparent, and to me it sounds better than simple emitter followers. The versions with active current source/sink sound better. I'm sure this buffer sounds good.
It would be cool to build something around BC857BPN. I know you've used them. How difficult are they to solder, and how difficult was it to lay out the board?
It would be cool to build something around BC857BPN. I know you've used them. How difficult are they to solder, and how difficult was it to lay out the board?
peranders said:
It's unlikeiy to be gold only, it's too porous to provide an acceptable shelf life.
Standard industry practice for ENIG finish is an electroless nickel layer 3-6um capped with an immersion gold finish of 0.05-1.0um. If accurate process control is maintained, then embrittlement should not occur.
Brian.
Hello
This thin film gold flashing can be done for diy prototypes , there is a product call Medallion liquid gold.
http://www.pitchwell.com/shop/pc/viewPrd.asp?idproduct=295
The product are mainly for jewellery but can be use for prototype pcb, maby there is kit specially for pcb.
Bye
Gaetan
This thin film gold flashing can be done for diy prototypes , there is a product call Medallion liquid gold.
http://www.pitchwell.com/shop/pc/viewPrd.asp?idproduct=295
The product are mainly for jewellery but can be use for prototype pcb, maby there is kit specially for pcb.
Bye
Gaetan
Looks good but I am hoping there is a non surface mount version 
. I already have lots of transistors I want to use too.
I was thinking of using a volume control with a buffer like this super buffer as a headphone amp/preamp. But how to solve the problem of DC offset? Would it be possible to keep it all DC coupled, no capacitors in the audio path?
. I already have lots of transistors I want to use too.I was thinking of using a volume control with a buffer like this super buffer as a headphone amp/preamp. But how to solve the problem of DC offset? Would it be possible to keep it all DC coupled, no capacitors in the audio path?
Both URLs are death. But I have save this files - go to the attachments
Moderator edit... pdf's of original copyright material removed.
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The DC blocker really does amazing progress with my sound. Every aspect of sound get better. Run mine into a Power bar with 6 Furutech Rhodium with Copper Ncf. Everything get so tight and clear and much more dynamic. This is the best I have ever done for my sound. Have made 4 off this now. 6 x 68000 uf 25 v.
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