Quote from: Boba7 on May 30, 2017, 01:02:24 PMThanks
Beautiful ! Great job.
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Show posts MenuQuote from: Boba7 on May 30, 2017, 01:02:24 PMThanks
Beautiful ! Great job.
Quote from: alanp on May 30, 2017, 05:01:21 AMThe tape looks ugly but I needed to have the mod board over the main board to adjust the modulation trimmers when needed and didn't have room for anything else.
Very nice! Cloth wire? I like the insulationreminds me of some of my 1590A builds.
Quote from: alanp on May 30, 2017, 05:01:21 AMThe tape looks ugly but I needed to have the mod board over the main board to adjust the modulation trimmers when needed and didn't have room for anything else.
Very nice! Cloth wire? I like the insulationreminds me of some of my 1590A builds.
Quote from: madbean on May 27, 2017, 03:36:35 PMI got ne570n from retroamplis.es
Some of those voltages are way off. Pin 7 should be closer to 3v. Pins 10 and 11 should be the same but somehow you have completely different voltages (could you have measured those two incorrectly?) Where did you get the NE570 from?
Quote from: madbean on May 27, 2017, 01:09:00 PMOk.i will recheck those resistances and caps,thank you.
I wouldn't go changing the NE570 until you know what the problem is. Take some voltage measurements, double check the part values to make sure they are correct (R13, R14, C10, C12), double check your soldering and reflow if needed. You should have a fairly large signal coming out of pin7. If everything looks correct and you still don't have signal from pin7 then it could be the IC. Another 570 or an SA571 might be called for.
Quote from: Boba7 on May 27, 2017, 11:50:14 AMI was doing that just now and I believe the problem it's in the ne570.Quote from: nunonaos on May 26, 2017, 07:04:31 PM
Ok, so no audio signal in any pin of ic3 (mn3005). I have audio (no delay) at output jack.
Any suggestions to where I should audio probe next?
Thanks
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Just follow the signal coming out at pin1 of Ic1 until you lose it! Could be the compander, a transistor. Look at the schematics and follow as best as you can the signal path, it's not too complicated.
Hope you get it to work!