As a simple first test, measure its capacitance?
-Scott
On 5/9/22 07:37, tedsorvino via
groups.io wrote:
Hi.
My question is this simple one.
Is there any easy test to make sure that a dual side true
condencer capsule is not burnt or shorted or faulty without using
it on a mic. No data available. Cheaper- about 30 euros- Ali
Express capsule.
Thank you in advance.
Here's my longer story .After experimenting a bit on electret with
success using the OPA alice design (all OPA 1642 bought from Ali
Express because of the know shortage from known retailers - good
results). Used larger Electret capsule bought from Ali Express for
15euros, All good so far with that simple built.
Then I experimented a bit with the Hex Inverter DC - DC CMOS
design and I managed to build 2 boards, One providing 65VDC and
another one - 65VDC.
So now I 've decided to use a dual side true condenser capsule
I've also bought from Ali Express for 30 euros for a more
ambitious built,
I'm using 4 pcbs. 2 different single OPA ones for the signal
(didn't have dual OPA pcbs around), and two Voltage ones for + and
- polarity. For "real estate purposes" I'm using an external box
for the pcbs and then leads to the mic and leads to the xlr of the
pre amp.
My initial testing with it?(just cardioid, then just omni, then
just fig. 8),? was quite all right. All out of the box, really
noisy there is signal and appropriate behaviour in accordance to
each mode, but it seems to have really low signal and after trying
to change the lead and positions and using the box, with some
grounding issues, I lost signal alltogether.
Firstly I'm afraid of having burnt or shorted something on the
capsule and then I would like to know if this capsule is all right
and whatever problem occurs hasn't got to do with it.
That's all.
--
---- Scott Helmke ---- scott@... ---- (734) 604-9340 ----
"I have ceased distinguishing between the religious and the secular,
for everything is holy" - Joe Henry
