Bloodstone Phaser - Mad oscillation at output

[Vivek_rc]

Hi All,

I've built the bloodstone phaser from lectric-fx and it was working well as expected, had already been boxed and was still functioning even when boxed up. However after a hour of running it started to crackle and then just went into a mad oscillation. I audio probed it and find there is a high pitched whine sound from IC1 pin7 and along the path to the 3pdt color switch on A2/A1. I'm not sure where to start troubleshooting and have checked the voltages of the ICs and they all check out. I'm not sure about the voltages I should be expecting on the cd4009 and wondering if it is damaged. I've tried to reflow all the joints but still not getting anywhere. It's weird cause it was working perfectly well but suddenly just went crazy [emoji51]. Any help and guidance would be appreciated.

Vivek

[Vivek_rc]

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[Scruffie]

Can you post your voltages?

The 4009 is static sensitive, possible it got a zap and then crapped out.

[Vivek_rc]

Can you post your voltages?

The 4009 is static sensitive, possible it got a zap and then crapped out.

Hi Scruffie,

Thank you for responding back, these are voltages I get, thanks again

[Thewintersoldier]

I just wanna say that I wish everyone posted their voltages so cleanly, bravo!

[Vivek_rc]

I just wanna say that I wish everyone posted their voltages so cleanly, bravo!

Haha, thanks Buddy. [emoji851]


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[Scruffie]

Here are approximate voltages from Haberdashers build;
IC1
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 5v
8 8.5v

IC2
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 5v
8 8.5v

IC3
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 4.5v
8 8.5v

IC4
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 4.5v
8 8.5v

IC5
1 6v
2 4.6v
3 6v
4 4.5v
5 6v
6 4.5v
7 6v
8 4.5v
9 6v
10 4.5v
11 6v
12 4.5v
13 0
14 6v
15 4.5v
16 6v

IC6 - This chip is LFO so voltages will be shifting around a lot, but you should be getting around 8.5v on pin 4 and pin 11 will be ground.
1 3.3v
2 4.4v
3 4.9v
4 8.5v
5 4.2v
6 4.2v
7 5v
8 4v
9 4.4v
10 4.4v
11 0v
12 4.7v
13 4.2v
14 7.2v

In relative terms, I can't see anything amiss with yours... the fact it did work then didn't says to me either a bad solder joint or the 4009 must have blown so I guess, re-flow the board and if that doesn't work, swap the chip out.

[Vivek_rc]

Here are approximate voltages from Haberdashers build;
IC1
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 5v
8 8.5v

IC2
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 5v
8 8.5v

IC3
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 4.5v
8 8.5v

IC4
1 4.5v
2 4.5v
3 4.5v
4 0
5 4.5v
6 4.5v
7 4.5v
8 8.5v

IC5
1 6v
2 4.6v
3 6v
4 4.5v
5 6v
6 4.5v
7 6v
8 4.5v
9 6v
10 4.5v
11 6v
12 4.5v
13 0
14 6v
15 4.5v
16 6v

IC6 - This chip is LFO so voltages will be shifting around a lot, but you should be getting around 8.5v on pin 4 and pin 11 will be ground.
1 3.3v
2 4.4v
3 4.9v
4 8.5v
5 4.2v
6 4.2v
7 5v
8 4v
9 4.4v
10 4.4v
11 0v
12 4.7v
13 4.2v
14 7.2v

In relative terms, I can't see anything amiss with yours... the fact it did work then didn't says to me either a bad solder joint or the 4009 must have blown so I guess, re-flow the board and if that doesn't work, swap the chip out.

Thanks Scruffie, I'll reflow the board. I've also ordered another 4009 but might take a few weeks to receive it. Might be able to get a cd4049ube from a local store and test it out. Thanks again for your help. Will report back on how I go.

Thanks

[Vivek_rc]

Must be my lucky day, local electronics store next to my sons daycare had 4009UBE, picked up 3 just in case!

[jimilee]

Must be my lucky day, local electronics store next to my sons daycare had 4009UBE, picked up 3 just in case!

I'm jealous, we got no electronics stores anymore.

[Vivek_rc]

Must be my lucky day, local electronics store next to my sons daycare had 4009UBE, picked up 3 just in case!

I'm jealous, we got no electronics stores anymore.

We have a local chain in Australia called Jaycar and they have a good selection, but pricey compared to tayda, but a big help that I can pop in when I run out of a specific component or two.

[Vivek_rc]

Got success, I swapped out the 4009 and the 324, now I get a nice phaser and vibe. Not sure which one is busted! [emoji28]not sure if I'm game to swap them out now and break things again! Thanks again for all the help Scruffie!