[Elecraft] MFJ-259B alignment information?
Don Wilhelm
w3fpr at isp.com
Thu Jul 15 21:34:43 EDT 2004
Does anyone know where I can find detailed alignment instructions for a
MFJ-259B?
I bought some Vishay precision non-inductive power resistors - 25 ohm, 50
ohm and 100 ohms 100 watt rating to use as dummy loads. I assembled them to
a proper heat sink and connected to an SO-239 with zero length leads - and
when I tried my MFJ-259 with these resistors, it told me that these
resistors were OK only up to 10 MHz or so!!! At 30 MHz, the 50 ohm resistor
read 62 ohms with a reactance of 10!!! Given the specs on these resistors
(flat to at least 170 MHz), I now tend to disbelieve my MFJ-259 and would
like to calibrate it. I have the instruction manual that came with it and
it is not adequate for a calibration task.
73,
Don W3FPR
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