----- Original Message -----
From: "Jim Pruitt" <[email protected]>
To: <[email protected]>
Sent: Monday, July 18, 2011 6:23 PM
Subject: [Drakelist] Need mic info on Shure model
19B209459P1
I acquired a Shure model 19B209459P1 microphone at a
hamfest a couple monts ago. It looks similar the 444 but I
can not find any information on it. I think it was used on
a Motorola or GE vhf base station so wonder if it is low
impedance. At any rate, would anyone have any information
on this microphone?
Thank you.
Jim Pruitt
The number is probably the Motorola or GE stock number.
Since you know the make and approximate model of the mic you
can probably determine its impedance by some simple
measurements. If its a passive mic, that is no internal
amplifier, the DC resistance of the element or transformer
secondary will tell you if its high or low impedance. If its
active it may not matter much if the output voltage is
sufficient for the transmitter you want to attach it to. If
the amp has an output transformer that also should provide a
clue by measuring its DC resistance. While the impedance and
resistance are not the same a low impedance mic will have a
resistance of a few tens of ohms and a high impedance mice
several hundred to a few thousand ohms.
While it may be a special of some sort it probably
isn't.
--
Richard Knoppow
Los Angeles
WB6KBL
[email protected]
_______________________________________________
Drakelist mailing list
[email protected]
http://mailman.zerobeat.net/mailman/listinfo/drakelist
