[hpsdr] External speaker with Mercury

[Alfred Green]

On 6/8/2011 12:11 PM, Bob G Mahrenholz wrote:
>
> I wish someone would come out with a blank board with only a connector 
> so we could build circuits to plug into HPSDR.
>

There was a suggestion way back when to do this. I guess it didn't 
happen, so Pinocchio is the closest we have.

>     From: Máximo EA1DDO_HK1H
>     Sent: Jun 8, 2011 1:54 PM
>     To: HPSDR
>     Subject: [hpsdr] External speaker with Mercury
>
>     Hi all,
>
>     I am thinking to install a external speaker for the audio. I can
>     see two jacks on the Mercury card, one is LineOut and the second
>     is Headset Out.
>     I wonder if anyone has connected a speaker to the headset output.
>     Has the headset out enough power to drive a small speaker?
>     or, It is a must to use the LineOut and an external audio amplifier?
>

I just tried it with my Mercury, and using a Radio Shack 8ohm speaker 
there is sufficient audio for a quiet shack.
I am using the same speaker with my Flex1500. The trick is to connect 
the speaker between tip and ring, and no contact to sleeve/ground. Also 
the top slider on the PSDR L/R audio control needs to be full left or 
right. Obviously there is no stereo effect available.

This is OK for portable use where powered speakers is another hassle, 
but in the shack I prefer to use my Bose externals.

73  Alf  NU8I
Scottsdale  AZ  DM43an
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