[AMRadio] SX-42 Question

W4AWM at aol.com W4AWM at aol.com
Mon Sep 17 18:42:09 EDT 2007

In a message dated 9/17/2007 6:10:43 PM Eastern Daylight Time, 
beethoven1 at sbcglobal.net writes:

> Anyone know were the mute contacts are on the SX42

The muting contacts are Pins 5 and 8 on the octal plug (SO-1) on the rear 
chassis apron of the SX-42. There is probably a jumper between those pins now. 
Operation of the SEND/RECEIVE switch on the front panel removes the center tap 
of the power transformer HV winding, effectively removing the HV from the 
receiver.  When using a remote switch or relay, place the SEND/RECEIVE switch in 
the SEND position.


John,  W4AWM

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