[Milsurplus] LS-454 with manpacks

[W2HX]

Brooke! Thanks a lot for the link to your page. One sentence caught my eye
in particular "the PRC-126 now fills the room..." Mine certainly did not! 

I discovered that the cable that connects the 454 with the U-229 has a
short! I bypassed the cable and connected directly to the 600 ohm input of
the transformer and voila! Beautiful audio.

Now back to see if Fair Radio has a spare (working) cable! Thanks for such
great reference info on your site.

73 Eugene W2HX


-----Original Message-----
From: Brooke Clarke [mailto:brooke at pacific.net] 
Sent: Saturday, September 19, 2009 10:48 PM
To: milsurplus at mailman.qth.net
Cc: Eugene Hertz
Subject: Re: Re: LS-454 with manpacks

Hi Eugene:

I have some maintenance info on my web page:
http://www.prc68.com/I/LS454.shtml


Have Fun,

Brooke Clarke
http://www.prc68.com


> Date: Sat, 19 Sep 2009 14:38:40 -0400
> From: "W2HX" <w2hx at w2hx.com>
> Subject: [Milsurplus] LS-454 with manpacks
> To: milsurplus at mailman.qth.net
> Message-ID: <002f01ca3958$6c44e480$44cead80$@com>
> Content-Type: text/plain; charset=us-ascii
> 
> Hi all,
> 
>  
> 
> Tried to connect an LS-454 to my PRC-174 today. What a failure! First, I
> found out (the hard way) that the LS-454 has a different pin out. So I
moved
> the wire from "E" to "B".
> 
>  
> 
> But then the radio simply didn't have enough audio output power to power
> this speaker. Surprising because on a H-189 the volume can make my ear
> explode!  I wonder if I damaged the matching transformer inside the 454
> after inadvertently applying 12V and ground to the 600 input? Anyone know
> the proper DC resistance for the 600 ohm input of the transformer?
> 
>  
> 
> So I guess I will need to install a little audio amp. But worse, I will
need
> to run a 3rd wire for supply voltage (in E 12V).  So it looks like a whole
> new cable will be required.
> 
>  
> 
> Anyone have suggestions on how to best accomplish the goal of a speaker on
> an PRC?
> 
>  
> 
> 73 Eugene W2HX