[Motorola] Astro Spectra VHF Range 2 to Range 1

[Johnjewkes at aol.com]

Hi Tim,
    I use Spectra and Astro Spectra for Army MARS Freqs  143 & 150 
with no problems. I have the RSS available via local National Guard unit  
(Comm unit). 
Changing the codes in the RSS fixes the band correctly (Hi or low  split)
No noticeable variance in reception ( still 1-3 microvolts). JUST one thing 
 though: 
the heads are very easy to damage when changing out. Also, bad caps in the  
unit
can cause a 'squish-squish-squish' noise in the background of  
transmissions. Check
all the caps for proper values. Yes, some heads include scan function, horn 
 alert on
receive or so forth... (One button simplex or repeat -They call simplex  
'Talkaround').
 
    You have to select on/off for these functions  inside the RSS. Then you 
save the file and 
feed it in via the RIB  into the midi-port (called a codeplug on the  
radio). So long as the 
unit is intact, it will read and write to the radio.
 
73 de John Jewkes, US ARMY MARS, Oregon/W6HNC
 
 
In a message dated 11/16/2009 1:03:11 P.M. Pacific Standard Time,  
w7trh at comcast.net writes:



Hello Folks, 



I am wondering how much hex  editing is involved in moving a Astro Spectra 
[VHF Hi Range 2] to [VHF Low  Range 1]. If this can be accomplished, how 
much does it affect rec. sens.?  (This radio will be used on USAF MARS 142-143 
mHz) 



I have  never done any hex editing......so if it is possible to lower range 
of  the Spectra [100 w trunk mount], I may ask for assistance with my  
"Project". 



Also, I thought I read that if you change control  head (ex. A9 to A5), you 
had to do something in software. I realize that  cables are the same. 



Thanks for any help you can provide!  



Tim Hardy 

W7TRH / AFA0TP 

Vashon Is. Wa.  
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