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Old March 21st 05, 05:34 AM posted to uk.rec.audio
Charles H. Riggs, III
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Posts: 14
Default The Opposite Of A 10dB Pad - 1:3 tranny

"Alan Rutlidge iinet.net.au" rutlidge@NO_SPAM wrote in message
...
The Shure A96F Line Matching Transformer
( http://www.shure.com/pdf/userguides/...ories/a96f.pdf ) should
work okay.
Setting the A96F to the 150 ohm option will give you the largest voltage
increase


I took a look at the pdf document you mentioned
and right there, in black and white, it says "The A96F can be modified for
microphones rated at 150  This
modification is only necessary if the output level from the A96F is
insufficient for your recording device." Well, of course, that is PRECISELY
my problem, and there's no doubt that making the modification and treating
the 66B as if it was a 150 ohm mike would appear to precisely solve my
problem.

I even opened up the transformer, precisely as described in the pdf
document. I even successfully identified all the crucial elements, the red
lead, the yellow lead, the location of pin 2, all of it. It was crystal
clear exactly what I had to do, namely cut the red lead, remove the
insulation from the end of the yellow lead and put it on the red lead, and
then solder the yellow lead onto pin 2 in place of the red lead. It would
probably take all of 10 minutes and my problem would be solved.

I opened the whole thing in hopes that I might be able to get
away with making the change while not needing to --

-- solder. You see, I have no soldering iron in the house, no solder, and
I've never touched one in my life, and I would feel like a child attempting
brain surgery. But wrapping lead around a contact is something I could have
gotten into, no problem.

Unfortunately, after close examination, it's obvious there is no way to
connect the lead to the pin except with solder. So there it sits, giving me
inadequate level, and
I'm stuck without the one tool and skill set which would solve this whole
problem.

Looks like this is a job for a soldering friend. Now the challenge is to
find a soldering friend. Which means one more hurdle, namely sweet-talking
a master solderer. I better
start talking!

Alternately, anyone know of a transformer for a mic with an XLR connector to
a stereo miniplug mike input which comes out of the box spitting out at 150
ohms rather than 600 ohms? Inquiring minds want to know.

Cheers,

Charles