Hole or NO hole - don't forget to take ambient room temperature into account 
when making adjustments to the Orion's TCXO.  In my case - - - My Orion now 
starts off about 20 Hz. low when first turned on.  This gradually moves up to 
about 5 Hz. high and it tends to stay there BUT! If I put the central air 
conditioner on the frequency gradually drops to about 10 Hz. low and then stays 
around THERE!    SO - IF you are wondering why you can not get your Orion to 
stay EXACTLY on frequency this is why.  A word, or two, about holes;  If you DO 
make an access hole in the bottom of your Orion - please take precautionary 
steps to protect against shorting any nearby connections should your alignment 
tool (if it has a conductive tip) misses the mark. There is quite a distance 
between the cover and the TCXO and this makes it hard to aim the alignment 
tool.  I have opted not to make any "ILLEGAL" holes in MY Orion.  73, Bill
wa2pvk@msn.com
Please visit my home page:  
http://mysite.verizon.net/wa2pvk
 
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