"EricM" wrote in message
...
On Sep 7, 8:38 pm, "DaveM" wrote:
TheOPsaid he had line-level audio... not a mike.

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in
the
address)

Life is like a roll of toilet paper; the closer it gets to the end, the faster
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wrote in message


wrote:

"bg" wrote in message news:g9uso7$2jt
...



bg is correct in that thistransformeris a low impedance microphone-to-grid
matching unit. Its turns ratio is about 1:10, meaning that if your primary
line
level voltage is 1VAC, then thetransformer'ssecondary level is going to be
around 10VAC (assuming the impedances allow it). I don't think that's what
you're after.

Of course, you could always send the secondary into a resistive voltage
divider
to get the level back down so the NE5534inputisn't overdriven. Better
still,
connect thetransformerin reverse; using the secondary as theinputand the
primary as the output. That would reverse the turns ratio to 10:1, so the
output level would be 1/10 theinputlevel. If you need to maintain the
frequency response characteristics of thetransformer, then you need to
experiment with source and load impedances that thetransformersees.

A better choice would be a 1:1 ratiotransformer; something like a 600:600
ohm
matchingtransformer.
--
Dave M

What microphone puts out 1 volt? Millivolts is more like it.

G²

I was intending to use it as a line level input, however I tried it
and got nothing. Removed it and patched the line level input directly
to the R/C network at the input of the first opamp and I get a very
low level signal but adjusting the level pot doesn't seem to do
anything. Will try the 600:600.


Sounds like your opamp circuit isn't working... or not wired correctly. Is it
possible for you to post a schematic of your circuit?
alt.binaries.schematics.electronic is a good place to post it. If you can do
ASCII art, just post it here.


--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

Life is like a roll of toilet paper; the closer it gets to the end, the faster
it goes.