"dykesc" wrote in message
...
On Jun 7, 10:56 am, Richard Clark wrote:

Do you use the MFJ-259B at the load, or through the line?

Through the line Richard. The way I take the measurements is by
replacing my transceiver with the 259B with the tuner in "bypass"
mode.

you might want to try the mfj reading again at the coax going into the
tuner. the length of the line and the impedance lumps from the relays in
the tuner will transform the impedance going through the tuner even in
bypass mode. while the difference may be small on the low bands it could be
significant on the higher bands.

On Jun 7, 1:15*pm, "Dave" wrote:

you might want to try the mfj reading again at the coax going into the
tuner. *the length of the line and the impedance lumps from the relays in
the tuner will transform the impedance going through the tuner even in
bypass mode. *while the difference may be small on the low bands it could be
significant on the higher bands.

Thanks Dave. I completely missed that. New data set follows with
transmission line directly connected to MFJ-259B. Maybe a little
better agreement, but still too many variables and uncertainties in
the instruments I have to expect much better. Owen, Cecil, Richard et.
al. pointed this out when I started down this trail. Still, it was a
good exercise and I learned some things along the way


Frequency(Mhz) MFJ-259B ZL Tuner ZL (calculated)

3.50 16-j52 27-j42
3.98 25+j31 32+j28
7.15 39+j11 46+j2
14.17 42-j22 53+j7
28.35 68-j37 65-
j16