Recently I completed this layout and had issues with noise (which feature in earlier comments) which after some investigating it came down to the way it was boxed up and daisy chain cable I was using: circuit has now been re-boxed and mentioned cable eliminated, problem solved. but sound great! Not sure still if should i use the quad, or stay with the BF's and holy shit, the phaser sounds really great wit the BF! I've not measured / selected them, so I don't think that 4 trannies you get from the bag are even remotelly matched. I'm stupid? Yes! 470k resistor from Ic1 3 to trimpot and so on, was not soldered at the ic side :P And knowing where the probem is, was unable to see it for 3 hours XDDDDDDÄ«y the way, I used 4x BF245B that I had in a bag, in order not to risk my 2N5452 quad. but the signal still gets distorted and with low output, at the IC1a output. Three hours debuggin and can't find anything wrong. I started to check ALL the fucking layout, cannot find a bridge, or a cold solder, everything seems OK, I swap ic's with 4558 ones, swap the 2n3906. eveything seems ok, cannot find the problem: I measure the rest of ic's and trannies, with really strange measurements. So something's wrong on IC1a side, anyway, I probe it: sound gets distorted on the very IC1a output. and a low and distorted output, nothing even similar to you would expect. Three hours deguggin when the problem was clearly isolated :P Plugged, battery on.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |