[AMRadio] More Lafayette HA410 stuff

Ed Sieb esieb at sympatico.ca
Sun Nov 29 16:10:35 EST 2009

Ah-ha!!!  So that's why mine does that!!!  (Replaced the mic on  my 460.)


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. 

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