Hi Everybody,

I am back  from my short vacation/trip to Adelaide South Australia where 
my SM1000 was hand delivered by David VK5DGR!  It was good to finally 
meet David after many email exchanges and telephone calls.

Today I was playing around in the shack with the SM1000 and thought I 
would hook up an external speaker to improve the received audio 
"quality".  However, when I plugged a handy test speaker into the 
SM1000... the audio stopped.

A quick look at the Rev:D schematic revealed what was happening. The 
external speaker socket is a TRS (tip ring sleeve) socket with both tip 
and ring connected to the internal audio amplifier.  Most of my external 
speakers are equipped with a mono (tip sleeve) 3.5mm socket... when you 
plug one of these into the SM1000 it will short out the audio output.

I quickly fitted a three pole 3.5mm plug and all was well.   For those 
with extension speakers lying around in the shack, you can't connect a 
mono one into the SM1000... be careful! :-)

73

Michael.
VK5ZEA



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