If you go to w8ji.com
the directions for calibration are well laid out.
These instruments are known to loose their calibration so it
is advisable to make a copy of the instructions.
If you send it back to the manufacturer then it will
be weeks before you get it back and it probably will
not be calibrated correctly anyway.
Have no idea what Helmut is trying to say as there is
not any external adjustments one can use by responding to a
particular measurement, so he is the one to put his thinking
cap on instead of pointing the finger at you !
Good luck
Art

Helmut Wabnig wrote in message . ..
On Mon, 08 Sep 2003 18:41:51 GMT, Allen Windhorn
wrote:

I just bought an antenna analyzer from MFJ, MFJ-269. Seems to work
pretty well, though I have a little doubt about the accuracy. Anyhow,
when I bought it from Burghardt, the technician there assured me that
it included a schematic as part of the manual, but when I got it,
there wasn't one. Has anyone received a schematic of this device?
If so, could I possibly get a copy? How about calibration methods.

Calibrate what?
Where is the problem?

use several ohmic resistors, carbon type,
and measure SWR and Rs.
X should be zero at 50 Ohm
if the resistors are HF usable.

use capacitors with known value, etc., use coils.
use cables of known length.

use your brain.
THINK.


w.