[hpsdr] External speaker with Mercury

[Dick Faust]

I was just working on another project that needed an audio amp of about 
3 Watts @ 12VDc & 8 Ohms.  Found 2 & a mike preamp - very nice kits .

The Velleman K4001 should be available internationally as it is produced 
in Europe.
The others are from Futurekit  www.futurekit.com

One Source for Velleman K4001 - many available
K4001 7 Watt Mono-Amp  Van Nyes CA $15.75 ship $7.00
http://www.allelectronics.com/make-a-store/item/MK-4001/7-WATT-MONO-AMPLIFIER-KIT//1.html

One source for the Future kits
FK604 Power Amp 8 Watt Mono $7.99 USPS shipping  from CT
http://www.bakatronics.com/shop/item.aspx?itemid=475

FK647: Dynamic Microphone PreampR $3.99 USPS shipping  from CT
http://www.bakatronics.com/shop/item.aspx?itemid=633

Dick Faust K9IVB

Bob G Mahrenholz wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>   
>
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> body{font-family: 
> Geneva,Arial,Helvetica,sans-serif;font-size:9pt;background-color: 
> #ffffff;color: black;}Hi Maximo,
>
> I have similar thoughts. I had a Softrock and built a little amplifier 
> for it to drive a speaker. I am putting together a HPSDR right now and
> haven't gotten my Mercury card yet but I suspect it will need a little 
> amplification to drive a speaker.
>
> I am thinking about building a speaker amplifier on a card that will 
> plug into the Atlas backplane. I will have a couple of empty slots. I will
> use one of the Ten-Tec Model 1550 Utility Audio Amplifiers. I will 
> include a volume control on the card.
>
> I have just ordered a Pinocchio card as an possible foundation to 
> build the amplifier on. I will only install the lower connector and 
> cut off the
> top of the board with the other connector. I will have to either 
> insulate my components from the traces on the board or cut them 
> (except for
> +12v and ground) at the bottom connector.
>
> I wish someone would come out with a blank board with only a connector 
> so we could build circuits to plug into HPSDR.
>
> Let me know if you find enough power out of Mercury to drive a speaker.
>
> Thanks,
> Bob
> K4QQK
>
>
>     -----Original Message-----
>     From: Máximo EA1DDO_HK1H
>     Sent: Jun 8, 2011 1:54 PM
>     To: HPSDR
>     Subject: [hpsdr] External speaker with Mercury
>
>     <ZZZ!-- .hmmessage P { margin:0px; padding:0px } body.hmmessage {
>     font-size: 10pt; font-family:Tahoma } --> 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?
>
>     Thank you
>
>     73, Maximo - EA1DDO
>
>
>
>
> ------------------------------------------------------------------------
>
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