Techtalk

I don't think it matters in this design, but I bought these: http://de.farnell.com/multicomp/bc140-1 ... =lookahead.
BC140-16 is also what is supplied with the kits.

Yeah, the substitutes I ordered are exactly the same brand and type as the ones that came with the kit. I ordered them at Farnell too.

Thanks!

Yeah I know...it is strange. I think it's way more likely that I damages the parts by putting on the heatsinks.

So there's no need the match them in any way, Volker?
And also, the 12 steps/11 dots on the frontpanel is correct, right?

I've got them working! After desoldering so many parts already I decided to go a step further. I ordered some BC140's and BC109's thinking that Volker may have gotten a bad batch of those. So I replaced the BC140's and guess what: I works. After thinking this over, I got to three possibilities: 1. T...

Ok, so I got the BC560's who Carsten so kindly sent to me. Result: Now all the gain settings either give a load of white noise or have the exact same ticking/oscillating noise. So none of the gain steps actually work... I'm pretty much at a dead end here...seems this rev.04 just isn't working. To pu...

Well...changing the ASY26 didn't change a bit, so that's definitely not the problem...

I hope it's ok to post in English, my German isn't that great... The other "big" difference in rev04 is the change in the output transformer, but I doubt that that would be the problem. So I was thinking, as this problem seems to affect mainly the newest rev., could it be a bad batch of ASY26's? Im ...