Differences
This shows you the differences between two versions of the page.
|
516tcxo [2007/04/09 22:20] n5na |
516tcxo [2007/05/21 00:42] |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ====== Argonaut V TCXO Adjustment Procedure ====== | ||
| - | **From the Ten-Tec Reflector March 7, 2003** | ||
| - | |||
| - | This morning, I decided to attempt a TCXO alignment on the ArgoV....it's a very simple and straightforward process. Please review these instructions in their entirety prior to proceeding with the first step below. | ||
| - | |||
| - | -Remove the 5 Phillips-head screws from the case (one on top, four on the sides). DO NOT remove the cover at this time. | ||
| - | -Power-up the Argo V and let it warm-up for one or two hours. While you're waiting for the unit to warm-up, locate a small jeweler's screwdriver and have it handy. | ||
| - | -While you're waiting for the warm-up, tune to WWV at 15 or 20 MHz. Try to use 20 MHz for best accuracy at all lower frequencies. If you can't get a decent 20 MHz signal, use WWV at 15 MHz. | ||
| - | -Also while waiting, go to the CW mode, and menu though the front panel keyer button until the side-tone becomes audible. You should now hear WWV beating against the Argo's internal CW side-tone. You may leave it this way during warm-up. | ||
| - | -After the warm-up period, remove the top case cover. You should have removed the top cover screws in Step 1. | ||
| - | -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. | ||
| - | -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. | ||
| - | |||
| - | Alignment Complete. | ||
| - | |||
| - | DISCLAIMER: PROCEED AT YOUR OWN RISK AND COMFORT LEVEL. No representation of warranty or fitness is offered concerning the | ||
| - | results, accuracy, nor safety of this information and accordingly, anyone using this information agrees to indemnify, defend, and | ||
| - | hold me harmless from any and all actual, consequential or incidental damages that may result from your reliance on this | ||
| - | information. | ||
| - | |||
| - | -Paul, W9AC | ||
