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516tcxo [2007/04/09 22:19]
n5na
516tcxo [2007/04/09 22:21]
n5na
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   -The TCXO module is immediately recognizable as a rectangular silver metal can on the top circuit board. ​ It is located near the center of the circuit board...just a bit to the right. ​ The TCXO is designated as U9.   -The TCXO module is immediately recognizable as a rectangular silver metal can on the top circuit board. ​ It is located near the center of the circuit board...just a bit to the right. ​ The TCXO is designated as U9.
   -You'​ll see a small straight-blade screw-adjustable capacitor visible through the TCXO's metal case.   -You'​ll see a small straight-blade screw-adjustable capacitor visible through the TCXO's metal case.
-  -Adjust the TCXO's capacitor in small increments with a jeweler'​s screwdriver until you have attained "​zero-beat"​ against the sidetone oscillator.  ​* Note: the capacitor'​s stator appears to be at ground potential and there'​s no need for an insulated screwdriver. ​ As the screwdriver is removed, zero-beat should not change. ​*+  -Adjust the TCXO's capacitor in small increments with a jeweler'​s screwdriver until you have attained "​zero-beat"​ against the sidetone oscillator.  ​__Note: the capacitor'​s stator appears to be at ground potential and there'​s no need for an insulated screwdriver. ​ As the screwdriver is removed, zero-beat should not change.__
   -Replace the top cover using its 5 screws that were removed in Step 1.   -Replace the top cover using its 5 screws that were removed in Step 1.
  
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 -Paul, W9AC -Paul, W9AC
  
 +----
 +**March 7, 2003**
 +
 +Although it should be obvious, the TCXO alignment procedure I previously sent is only relevant to the Argo Model 516TCXO. ​ Do not
 +attempt this procedure with the Model 516 as there is no TCXO to align.
 +
 +-Paul, W9AC

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