The original ceramic mike had an extra set of contacts on the PTT switch to do a "break before make" of the mike lead. It also shows these contacts on the schematic. Pete, wa2cwa http://www.manualman.com
On Sun, 29 Nov 2009 16:10:35 -0500 "Ed Sieb" <[email protected]> writes: > Ah-ha!!! So that's why mine does that!!! (Replaced the mic on my > 460.) > > Ed, VA3ES > ----------------------------------------------------------------------- > > Greg Mijal wrote: > One thing to look out for when changing mics on the 410/460 is that > you have > to use a microphone with a second set of contacts to disconnect the > mic > element from the circuit when going to receive and vice versa. If > you don't > you will get a loud bang out of the speaker when you release the PTT > switch. > It does that because the transmitter mic audio amp is also used in > the > receiver audio and the bang is there while the relay is moving. > Learned this one the hard way. ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
