SE Electronics Z3300a
- Thread starter TornadoTed
- Start date
Help Support GroupDIY Audio Forum:
Yes
And look what I have found : the + & - were "glued" by short-circuit
and for what I can see (quite impossible to send a pict 'cause it's so small) there has been a short-circuit for sure (one can see the cooper of the 2 wires)
I have to change these two wires...
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Yeah, you're right, but what could have been the damage ??? I think I'll be able to put back the transistors (if they didn't suffer)Hooray for "blind" advice...
Zero f**ks given during assembly? And/or the previous owner "took a look" very very carelessly...
One or the other but not me !
The mic was ok for a couple of hours. I did audio tests oon my last quad tube mic pre... and suddenly it gave up with crackling noise (see the spectrum I recorded)
I opened it AFTER it was OOO (Out Of Order)
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No I didn't replace them yet, just push them appart to end this possible (surely) short-circuit... but since it's the same situation I believe something is damaged... (remember the 2 tr are desoldered)
SERIOUSLY???
Well, how the hell do you expect to get any audio, with the capsule not getting any voltage?
The microphone gave up yesterday, so:
1) I opened it to take measurements, mainly at the input of the DC/DC card and I noticed a voltage of 1.9v
2) I did the same measurement as the one that works and I found 24v
3) I came to talk about it on the forum
4) after a few discussions, micolas advised me to change the 2 original transistors with equivalent values (see his post above)
5) I opened the microphone (once again) to de-solder them
6) I opened the microphone tonite (once again) to take measurements (once again) and also photos (at your request) and that's when I noticed 2 problems:
- the inductor wire which was wandering on a track (I cut it)
- the 2 power supply wires short-circuited
Here we are now...
1) I opened it to take measurements, mainly at the input of the DC/DC card and I noticed a voltage of 1.9v
2) I did the same measurement as the one that works and I found 24v
3) I came to talk about it on the forum
4) after a few discussions, micolas advised me to change the 2 original transistors with equivalent values (see his post above)
5) I opened the microphone (once again) to de-solder them
6) I opened the microphone tonite (once again) to take measurements (once again) and also photos (at your request) and that's when I noticed 2 problems:
- the inductor wire which was wandering on a track (I cut it)
- the 2 power supply wires short-circuited
Here we are now...
When I discovered that the circuit was fed by only 1,9v I stopped expecting any sound... and localize (or so) taht the problem had to do with voltage alimentationSERIOUSLY???
Well, how the hell do you expect to get any audio, with the capsule not getting any voltage?
No but there are pushed appart from each other (like on the pict) so it's
