"Jim Shorney" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- On Fri, 04 Jul 2008 10:44:50 -0400, Dan Ringer wrote:
>Amplified microphones became popular in the late 70's and early 80's, >concurrent with, and perhaps because of the "CB Craze": In the case of the D104, the amplifier is an imedance matching buffer with some gain. This was done to allow the microphone to be used with the low impedance input of solid state CB rigs. >The amateur radio version of all this was that some of the "ricebox" rigs, >needed higher audio input to operate . They started using preamplifiers at >the microphone input to get it. Some did it by putting the preamp in the >microphone (Icom) others put it in the rig. This was also a trend in the commercial radio market. I'm not sure why they went that way, but perhaps because it made dynamic mics interchangable with electret. There's also the possibility that they did it because it's easier to keep induced noise out of the mic cord when the mic circuit is run at a higher lever. I've got some old GE Phoenix radios that have a dual input, pre-amped and non-preamped. >The CB version was that "power mics" were good and the louder you were >the, uh, louder you were. This was not a completely untrue thought. Good >modulation is, . . . good, but easily abused. CB ops tend to like to keep the mic sitting on the table and just reach over and push the button. Of course, this creates a signal-to-noise ratio issue. You could always tell what they were watching on TV, how many dogs they had, whether or not the wife and kids were home, etc. You were a big dog if people could hear your click-click rotor box turning while your were talking. The effect is even worse with compressor mics like some of the Turner models. And then, there's the concept of "swing" - turn the mic up and get more "swing" - the more the better, right? Splatter? What's that? >Clearly Drake >had a better idea! Was there ever any doubt? :) 73 -Jim NU0C ---------------------------------------------------------------------- Submissions: drakelist@zerobeat.net Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
