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Old November 29th 07, 02:22 AM posted to rec.radio.cb
Steveo Steveo is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 1,054
Default value of a 20 year old Astatic Silver Eagle Mic

Frank Gilliland wrote:
On 28 Nov 2007 23:22:25 GMT, Steveo wrote in
:

Jay in the Mojave wrote:
Steveo wrote:

Hey Jay I just picked up an mc-60 cheap for this kenwood, dude
dropped it off for test and tune. It ain't an electro voice or a
heil but i'm getting good audio reports from it at any rate. (i hit
the up/down switch by mistake if i'm not careful) instead of the
key.

Hello Steveo:

Yeah those MC60 mics are good mics. I had one and it sounded like
broadcast quality audio. If you can get our hands on a Sure 444 those
also great mic's.


Hi Jay, yeah I've heard those Shure mics on the air and they have a nice
sound too. Microphones are a strange bird, what sounds good on one radio
may sound like crap on another. Heil makes a good sounding mic too imo.
I'm happy with this mc-60 so far..but I'm always looking for better
audio, you know how it goes..


The two things to watch are impedance and output level. You need a mic
with an output impedance that is equal to, or lower than, the input
impedance of the radio. The Shure 444D and some other mics let you
switch between low and high impedance outputs to better match the
radio. As for the mic's output level, if it's fixed then you need to
adjust the mic gain to match the mic. Note that high impedance mics
generally have high output levels, and low impedance mics have low
output levels. So if you want to use a low impedance mic with a radio
that wants a high impedance mic, you may need either an impedance
transformer or a mic pre-amp to get the level high enough for the
radio to use.

Sometimes I don't explain things very well, so if you got lost then
let me know and I'll try to explain it better.

Hello Frank

Yeah you explained it just fine man. I understand the impedance part and
mostly high z with tube rigs and low z with transistor's. This mc-60 is
switchable to either but like I said before mics are a strange bird and
will vary from transmitter rig to rig and brand. You never know until you
hear it on the air.