So are you planning to remove the transformer "bell" sometime this century? Surely removing a couple of screws can't be so difficult...
SE Electronics Z3300a
- Thread starter TornadoTed
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Help Support GroupDIY Audio Forum:
So are you planning to remove the transformer "bell" sometime this century? Surely removing a couple of screws can't be so difficult...
calm down Khron
it's alreday done ! nothing special to notice in there...Ok, then why not show us too? And if everything is ok there too, how come the microphone (still) doesn't work right?
check if there is (in the transformer) contact between primary and secondary, just out of curiosity
with the secondary of the transformer disconnected, do you have good voltage on the junction between R4 and R3?
check each terminal of the fully desoldered transformer for a short circuit to GND
take a picture, then measure the DC resistance, for identify primary and secondary
Middle black should go to XLR 1; white on the same pad should be transformer primary negative.
Black & green going to R3 & R4 should be the transformer secondary.
Red should be transformer primary positive.
Pink & other white should be XLR 2 & 3 (you'll have to double-check which is which, AND make sure the right wires go to the right pins of the XLR).
Now would be the time to measure resistances between all combinations of those six pads.
Be systematic - starting from the bottom, black-to-pink, black-to-red, black-to-black/white, etc, then pink-to-red, pink-to-black/white, and so on...
Be systematic - starting from the bottom, black-to-pink, black-to-red, black-to-black/white, etc, then pink-to-red, pink-to-black/white, and so on...
Yes Sir !
The values around the Tr are ok for you ?
If so, then let's go back to the first board (pre-board)
Yes, "unfortunately" the wiring here looks ok.
Just to make it clear for my brain, i doodled out the connections, and i hope the labeling makes sense.
Transformer primary winding is ~123 ohms (R3 & R4 in parallel with it can be ignored for this); the secondary about 50-52 ohms.
Just to make it clear for my brain, i doodled out the connections, and i hope the labeling makes sense.
Transformer primary winding is ~123 ohms (R3 & R4 in parallel with it can be ignored for this); the secondary about 50-52 ohms.
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so as you said earlier, it's a 2:1 or so...
I ask again:
R5 unsoldered
dc/dc disconnected
transformer secondary wires disconnected
the Phantom powered microphone
How much does it measure at the junction
R3 with R4?
R5 unsoldered
dc/dc disconnected
transformer secondary wires disconnected
the Phantom powered microphone
How much does it measure at the junction
R3 with R4?
