257Views11Replies

Author Options:

Are these Capacitors Fried?? Answered

I think i blew out a cheap voice chance I have... can anyone verify that the capacitors I have circled are indeed blown... I've never looked before, and am not 100% sure the black isn't just a manufacturers marking. also, the caps are 20pF and 56pF and I need to replace them STAT... would Radio Shack's 100 pack capacitor grab bag have these numbers?

Discussions

0
None
Plasmana

10 years ago

The black markings are manufacturer's markings, they are not fried.

0
None
gschoppe

10 years ago

i discovered my issue, it was nothing more than the mic contacts shorting each other... it works again

0
None
gmoon

10 years ago

I agree with everyone--it's unlikely they are blown.

Re: Radio Shack 'grab bag': those are unusually small capacitance values, so who knows? I've used this supplier before...

0
None
Goodhartgmoon

Reply 10 years ago

Wow, I haven't seen a GoldMine catalog in eons .

0
None
Goodhart

10 years ago

I really doubt that they are "blown" unless you sent quite a current through them. I have seen caps marked like this.

0
None
gschoppeGoodhart

Reply 10 years ago

I believe I fed headphone level output through a microphone input. Is that enough, or should I be looking elsewhere for the issue.

0
None
Goodhartgschoppe

Reply 10 years ago

I wouldn't think that would be too much of a problem (now, if you fed it through a "crystal mic", the mic might not have liked that very much :-)

0
None
its a liongschoppe

Reply 10 years ago

ive run a headphone out into a mic in before. never hurt anything when i did it.

0
None
gschoppe

10 years ago

If I did destroy something via overpowering the input, would it likely be one of the caps/diodes/resistors, or am i likely looking at a dead LM386 amp (not a big deal, I've got spares), or a dead IC (a big deal, as it's encased in epoxy)?

0
None
Punkguyta

10 years ago

They're fine, those are most likely marks from the QOS station to mark that they were tested good. And yeah if they were blown, you'd know because there would be black around them on the pcb.

0
None
NachoMahma

10 years ago

. If those are ink/paint marks, then they are probably OK (or at least that's not an indicator of damage). If the orange coating is chipped, they are suspect.
. Just guessing, but judging by the way the unit looks, I'd say their pF values are not critical.
. If you're referring to RS's p/n 272-801, youll have to contact RS (all it says on the web page is "assorted values"), but I'll bet they don't know.