Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

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Pepe
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Re: Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

Post by Pepe » Thu Jun 16, 2022 3:39 pm

Impressive how much work you put into it. Congratulations for saving the pedal!
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laurie
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Re: Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

Post by laurie » Thu Jun 16, 2022 5:26 pm

hah! It ended up being something that "I wasn't going to let beat me".

Plus it did save a really good vintage pedal. Heartbreaking for something like this to end up in the trash/junk.

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Re: Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

Post by laurie » Sat Jun 18, 2022 1:02 pm

Finished repair.
.
DF-2 01.jpg
DF-2 01.jpg (390.62 KiB) Viewed 403 times

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Pepe
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Re: Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

Post by Pepe » Sat Jun 18, 2022 3:20 pm

I didn't remember it having such a crammed board!
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laurie
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Re: Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

Post by laurie » Sat Jun 18, 2022 9:13 pm

Pepe wrote:
Sat Jun 18, 2022 3:20 pm
I didn't remember it having such a crammed board!
Yeah... fault-finding was a bit of a grind ;)

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fuzzbuzzfuzz
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Re: Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

Post by fuzzbuzzfuzz » Mon Jun 20, 2022 7:06 am

Superb job Laurie, great effort, Columbo-esque!

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Re: Whining Sound DF2, Does Anyone Have Suggestion Which Capacitor Could be the Culprit ?

Post by bigtone23 » Mon Jun 20, 2022 8:46 pm

laurie wrote:
Thu Jun 16, 2022 12:17 pm
This is the failed transistor. The gain (hfe) should be around 500.
.
DF-2.jpg
Nice work getting that one fixed! Deep sleuthing!
I know where my pedals will holiday when the time comes. ;)
*Raises glass* *Cheers*

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