[Elecraft] Using a KX2 with an SP3 external speaker ?

[Walter Underwood]

I use a 15 W per channel amp that runs off of 12 V. It costs about $10 (price varies) from Amazon. I wrote it up on my blog.

https://observer.wunderwood.org/2017/03/04/speakers-for-my-elecraft-kx3/ <https://observer.wunderwood.org/2017/03/04/speakers-for-my-elecraft-kx3/>

This amp and the one Dave recommends are both built around a TDA audio amp IC.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jul 12, 2017, at 11:40 PM, Dave AD6A <dave at ad6a.com> wrote:
> 
> Phil,
> 
> I use a little 7W mono amp from MCM electronics that gives plenty of punch
> into a small comms speaker.
> I've tried it with the SP3 also - works just fine. I also use one with my
> KX3 on my 10/24GHz portable rig.
> 
> It's part number 809077 at MCM here
> http://electronics.mcmelectronics.com/search?w=809077
> 
> 73,Dave, AD6A
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Phil Hystad
> Sent: Wednesday, July 12, 2017 10:56 PM
> To: elecraft <Elecraft at mailman.qth.net>
> Subject: [Elecraft] Using a KX2 with an SP3 external speaker ?
> 
> So far, I have mostly used my KX2 with headphones but I just acquired the
> KXPA100 100-watt amplifier so will be using the KX2 plus KXPA100 for a
> backup base station.  And, I think I want to use an external speaker.
> Preferably my  Elecraft SP3.
> 
> I understand that the KX2 requires the Headphones output to be amplified for
> use with something like the SP3.  Has anyone built their own little audio
> amp or maybe just purchased one for using with the SP3?
> 
> Or, any other ideas would be welcome as well.
> 
> 73, phil, K7PEH
> 
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