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Subject: RE: Re[4]: Microphone.
From: Matthew P. OReilly (moreilly_at_moreilly.com)
Date: 2002-10-19


*Supposedly*, the A96F is supposed to boost the signal level by up to 25dB.
I'm not sure what it does for impedence. Aren't these the two areas we're
trying to improve?

Admittedly, I don't know how it would boost the signal without a power
source of some kind, like a battery. That's sort of confusing to me, but I
had just chalked it up to my inexperience with electronics.

Does the Shure A95UF
(http://www.shure.com/accessories/a95uf.asp?PN=Problem%20Solvers) seem any
more likely to work, or are we really barking up the wrong tree here?

Matthew P. ;-)

-----Original Message-----
From: owner-rockbox_at_cool.haxx.se [mailto:owner-rockbox_at_cool.haxx.se]On
Behalf Of Uwe Freese
Sent: Saturday, October 19, 2002 8:35 AM
To: Matthew P.OReilly
Subject: Re[4]: Microphone.

Hello Matthew P.,

(oops, just a joke)

Matthew P. OReilly wrote on Saturday, October 19, 2002, 6:15:03 AM:

MPO>
http://shure.custhelp.com/cgi-bin/shure.cfg/php/enduser/std_adp.php?p_sid=cb
MPO>
NSM3sg&p_lva=&p_faqid=38&p_created=950083200&p_sp=cF9ncmlkc29ydD0mcF9yb3dfY2
MPO> 50PTI3NTkmcF9wYWdlPTE*&p_li=
MPO> (This one actually gives three solutions. The middle one is the one
we're
MPO> interested in. There's a really good link
MPO> to a white paper about transformers, too.)

I'm pretty sure that this device doesn't amplify and it also cannot give
the phantom power to a connected "real" condensor mic because there is
no power that comes out of the Line-In-plug of the AJB.

"My" solution for mic-on-AJB is:

- self-made amplifier with 9V battery
- electret condensor mic (for ex. Sony ECM 907)

By now, I only tested my amplifier with cheap mic capsules and the
result is not so good. I'll try the sony mic when I bought one. ;-)

Bye, Uwe.



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