[Boatanchors] NC270 Muting

Dale Parfitt parinc1 at frontier.com
Thu Apr 7 11:15:07 EDT 2011

Have you looked at the schematic? The external  screw terminals appear to be 
controlled by the standby switch- so as you put the RX in standby, those two 
terminals are shorted for external relay operation- they are not for muting. 
If you want to mute the RX, I would think you could rewire those terminals 
to emulate the standby switch- a logical AND gate - (caution, there is B+ on 
that switch) or  wire the speaker in series with those terminals and use the 
extrernal relay to open up the speaker line.

Dale W4OP

> Hi Guys... Have a Natoional 270 and need to know how to mute it... It has
> relay screws in the rear but when shorted do not work...
> Any ideas????
> Very Best 73's
> Bob Peters
> W1PE
> Money is only temporary, Radio is forever
> From The Old Dog
> _______________________________________________
> Boatanchors mailing list
> Boatanchors at puck.nether.net
> https://puck.nether.net/mailman/listinfo/boatanchors


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