i think there is still an error with the 13K, they are mixed up. That one to ground should go to vcc and the other one to ground. The 470Uf and 220Uf are also mixed. But i still dont get mine to work.
Didn't know you were building this. Brave! I spotted the same mistakes as you while going over it once again. 13k resistors were mixed up as well as the470uF and 220uF caps. But I cant spot any other mistakes...:-/
Hi, lets try typing this again in a less confusing manner lol I know this is 5 years late but thought id mention it anyways, and I'm not sure what the difference would be but it seems that at row V/column 3, the upper lead of the 1M resistor (R3 on the current version 2 schematic or R2 on the original buffer bypass version) should be going to Vref. As it is right now it's placed between the 4k7 coming off pin 2 of IC.1 and the 22uF's positive, with it's negative going to ground. Perhaps this was a remnant of the buffered BP version as on that original schem that particular 22uF (originally labeled C5) went to vref. The version 2 true bypass schem has it going to ground and relabeled C4. I'm no rocket surgeon, more of a trial and error kind of guy, so for now I'll pop a socket on that 1M's upper lead and another on a nearby ground rail and see what happens in both locations :)
the 4,7 k on ic2 pin 1 should go to pin 2. Also the 13 K parallel to 2,2 Uf should go to row R not Q. And the 13 K at Q should go to ground
ReplyDeleteThanks. Good catch. Looks better now?
Deletei think there is still an error with the 13K, they are mixed up. That one to ground should go to vcc and the other one to ground. The 470Uf and 220Uf are also mixed. But i still dont get mine to work.
DeleteDidn't know you were building this. Brave!
DeleteI spotted the same mistakes as you while going over it once again. 13k resistors were mixed up as well as the470uF and 220uF caps. But I cant spot any other mistakes...:-/
maybe its also a mistake on my build... but when i put a 1 mOhm from IC2 pin 5 to Vref its working. But not sure if it sounds as it should...
Deletecheck the 68K on the right. I think it should be connected to the 47 k
ReplyDeleteAh, yes! The bottom leg needs to be moved up to row J between 47k and 47nF.
Deleteyes, now its working!
DeleteIt works?! I guess I should tag it?
Deleteyes you can tag it
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DeleteHi, lets try typing this again in a less confusing manner lol I know this is 5 years late but thought id mention it anyways, and I'm not sure what the difference would be but it seems that at row V/column 3, the upper lead of the 1M resistor (R3 on the current version 2 schematic or R2 on the original buffer bypass version) should be going to Vref. As it is right now it's placed between the 4k7 coming off pin 2 of IC.1 and the 22uF's positive, with it's negative going to ground. Perhaps this was a remnant of the buffered BP version as on that original schem that particular 22uF (originally labeled C5) went to vref. The version 2 true bypass schem has it going to ground and relabeled C4. I'm no rocket surgeon, more of a trial and error kind of guy, so for now I'll pop a socket on that 1M's upper lead and another on a nearby ground rail and see what happens in both locations :)
Delete*nearby Vref rail...good lord, still messed that up after 3 tries lol awww screw it, I'm going to bed
Delete