[CQ-Contest] Quick TS-850 dial calibration

[Dave Hachadorian]

There are a lot of TS-850's out there. Here's a quick
procedure for checking and aligning frequency
calibration. This general approach behind this
procedure should apply to almost any radio.
Calibration is especially important if you are
using packet/telnet.


TS-850 Quick Dial Calibration Check

1. Tune the radio to 10Mhz, so you can hear WWV.

2. Press the "tune" button on the radio (keypad #7).

3. Set vfo A to 10000.10 KhZ.

4. Set vfo B to 9999.90 Khz.

5. Flip back and forth between vfo A and B. On both, you should
hear a low tone of about 100Hz, just off zero beat of the
WWV carrier. If the tones are not exactly equal in frequency,
adjust TC-5 on the PLL Unit, as follows:


TS-850 Quick Dial Calibration

6. Remove the TS-850 top cover.

7. There is a three-stack of boards on the left side
of the radio. On the left side of the lowest shield,
there is an elliptical cutout. Peek inside, and you
will see the screwdriver-adjustable pot TC-5.

8. Make a small adjustments to TC-5, and repeat step 5
above until the two tones are exactly equal in frequency.


Dave Hachadorian, K6LL
Yuma, AZ