The TS-480 is amazingly stable without the TXO.  Unless you are super 
fussy, you won't need it.  I have a friend who bought one for his 
TS-830 some years back and said he really couldn't detect the improvement.

At 01:16 PM 2/7/2008, you wrote:
>Hello;
>I ran across a reasonably priced ts480 used on the arrl site.  It is long
>gone but I'm wondering how difficult it was to install the voice guide and
>filters?  are they plug in?
>Also have folks found that they needed or wanted the tcxo extra for the
>ts480?
>Richard
>
>
>
>
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