Posted by
Francis Belliveau on
Jul 26, 2006; 3:35am
URL: http://elecraft.85.s1.nabble.com/Funny-power-measurements-tp392406p392412.html
Okay so now I have made Peak-to-Peak measurements with my O'Scope.
KAT2 removed.
50 Ohm dummy load with 10x Probe attached.
Measurements are in the table at the bottom of this email. It should be
easier to read in Notepad.
Although there is likely a bit more inaccuracy in my readings, consistency
should be reasonably maintained. The readings are still mostly all over the
place with 20 & 30 meters looking pretty good. 80 meters is still way off
base. Something seems wrong here to me but I have no clue where to start
chasing things.
Fran
-----------------------------------------
| Freq (Mhz) | V (P-P) || Watts; R=50 |
| PwrSet-> | 4 | 10 || 4 | 10 |
|------------+------+------++------+------|
| 3.500 | 50.0 | 70.0 || 6.3 | 12.3 |
| 3.750 | 74.0 | 86.0 || 13.7 | 18.5 |
| 4.000 | 71.0 | 80.0 || 12.6 | 16.0 |HiCur=3.0
|------------+------+------++------+------|
| 7.000 | 49.0 | 76.0 || 6.0 | 14.4 |
| 7.150 | 53.0 | 79.0 || 7.0 | 15.6 |
| 7.300 | 50.0 | 74.0 || 6.3 | 13.7 |
|------------+------+------++------+------|
| 10.100 | 40.0 | 76.0 || 4.0 | 14.4 |
| 10.125 | 40.0 | 74.0 || 4.0 | 13.7 |
| 10.150 | 40.0 | 74.0 || 4.0 | 13.7 |
|------------+------+------++------+------|
| 14.000 | 40.5 | 76.0 || 4.1 | 14.4 |
| 14.175 | 43.5 | 78.0 || 4.6 | 15.2 |
| 14.350 | 36.5 | 64.0 || 3.3 | 10.2 |
|------------+------+------++------+------|
| 18.068 | 52.0 | 79.0 || 6.8 | 15.6 |
| 18.118 | 53.0 | 80.0 || 7.0 | 16.0 |
| 18.168 | 54.0 | 80.0 || 7.3 | 16.0 |
|------------+------+------++------+------|
| 21.000 | 56.0 | 80.0 || 7.8 | 16.0 |
| 21.225 | 53.0 | 77.0 || 7.0 | 14.8 |
| 21.450 | 48.0 | 74.0 || 5.8 | 13.7 |
|------------+------+------++------+------|
| 24.890 | 47.5 | 82.0 || 5.6 | 16.8 |
| 24.940 | 46.0 | 82.0 || 5.3 | 16.8 |
| 24.990 | 44.0 | 80.0 || 4.8 | 16.0 |
|------------+------+------++------+------|
| 28.000 | 75.0 | 84.0 || 14.1 | 17.6 |
| 28.400 | 72.0 | 81.0 || 13.0 | 16.4 |
| 28.800 | 58.0 | 68.0 || 8.4 | 11.6 |
-----------------------------------------
Expect | 40.0 | 62.2 |
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