[hpsdr] External speaker with Mercury

[jim KI6NJF]

I forgot to mention that these were based on the Toshiba TA8201 integrated 
amps.  IIRC they have about 10% THD at 10watts.  So they are NOT a hi-fidelity 
amp by any stretch of the imagination.  But for a cheap $12 and 2 weeks 
shipping from Taiwan they are not bad. 

I originally wanted them for my 1973 Toyota land cruiser which is so noisy 
that 3 watts from my mobile rig is just barely discernible above the road 
noise.

jim

> On Wed, Jun 8, 2011 at 6:21 PM, jim KI6NJF <ki6njf at verizon.net> wrote:
> > ***** High Performance Software Defined Radio Discussion List *****
> > 
> > Awhile ago I picked up 3 of these 15 watt stereo 12VDC powered amps for
> > another seller in Taiwan.  Don't believe the 180 watts BS their only 10
> > to 12 watts.  They work well for integrated amps but do suffer from
> > power-on "pops" I also don't like the flashing blue led behind the
> > controls, but that easily snippable.
> > 
> > http://cgi.ebay.com/Home-Hi-Fi-Audio-Stereo-Car-Digital-Power-Amplifier-
> > AMP-/200603935758?pt=Car_Amplifiers&hash=item2eb4ed240e
> > 
> > haven't delt with that seller
> > 
> > 73s
> > 
> > jim
> > ki6njf
> > 
> > On Wednesday, June 08, 2011 03:42:09 PM Luke Steele wrote:
> >> ***** High Performance Software Defined Radio Discussion List *****
> >> 
> >> When I originally set up my HPSDR, I used a pair of amplified computer
> >> speakers. Whilst this was ok, I did experience RF feedback. In addition,
> >> the speakers were still active when I used headphones.
> >> 
> >> So, I fitted a small amplifier module and loudspeaker inside the Pandora
> >> enclosure.
> >> The amplifier I used was a Kemo #M31 3.5W universal amplifier module. It
> >> may be better to knock up an amplifier using an LM-380, or similar,  but
> >> the Kemo module was there on the shelf in the electronics store so I
> >> grabbed it.
> > 
> > [snip]
> > 
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> > 
> > --
> > 73s
> > 
> > jim
> > KI6NJF
> > _______________________________________________
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-- 
73s

jim
KI6NJF

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