Rebote 2.5 prob.

[JimRayden]

The voltages on the pins look just about right and it gives out straight signal. So the opamp is okay but 2399 isn't.

PT2399

1  5
2  2.5
3  0
4  0
5  2.88
6  2.51
7  0.56
8  0.58
9-16  2.52

Seems to be ok, though it wouldnt' hurt if anyone else would recheck them.

Any other tests to do before digging out the scope? I can't think of any. I've checked several times for solder bridges and cold joints but it seems ok. Any other points in circuit for voltage measuring?

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Jimbo

[bancika]

Did you try audio probe on delay chip?
check out this thread, maybe it helps http://www.elixant.com/~stompbox/smfforum/index.php?topic=43054.0

[JimRayden]

Yeah, I've read all of 'em already. I'll propably scope it tomorrow, but I want to know if there are any other tests to make before I wipe the dust off my scope. I'm lazy when it comes to scoping.

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Jimbo

[bancika]

I didn't mean scope, just simple audio probe, like this (on the bottom of the page)
http://storm-software.co.yu/diy/index.php?project=stuff

[JimRayden]

The dang thing works. I just removed everything from the enclosure for probing and it fired right up. Stuck it back into box and it kept on echoing. Perhaps I overheated one of the cheapo plastic pots...


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Jimbo

[bancika]

maybe your PCB has contact with enclosure or other metal parts, check that out. If you haven't done it already put some plastic foil under board

[JimRayden]

The PCB is soldered to the pots hanging about an inch above any enclosure surface in a quite large sheet metal enclosure that is powder coated inside and out. Not much to have contact with. Currently it's working fine but I'm afraid it could go offline during a gig, which would not be a good thing at all. Oh well, got to keep my fingers crossed. and a screwdriver handy at gigs.

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Jimbo