From my notes, it was diode D3. (May not always be the same)
I got the calibration info from a W8JI WEB site posting.
http://www.w8ji.com/mfj-259b_calibration.htm
73
Bruce-K1FZ
www.qsl.net/k1fz/beveragenotes.html
----- Original Message -----
From: "Hardy Landskov" <n7rt@cox.net>
To: "Bruce" <k1fz@myfairpoint.net>
Sent: Friday, January 24, 2014 11:16 AM
Subject: Re: Topband: End of a bias tee adventure?
I would like to know which diode because mine is doing the same thing.
There is nothing in the manual on how to calibrate it either.
73
Hardy N7RT
----- Original Message -----
From: "Bruce" <k1fz@myfairpoint.net>
To: "Pete Smith N4ZR" <n4zr@contesting.com>; "topband reflector"
<Topband@contesting.com>
Sent: Friday, January 24, 2014 8:49 AM
Subject: Re: Topband: End of a bias tee adventure?
Years ago when I "did in" my MFJ meter, 50 ohms was reading 40 ohms. It
was a real chore to change out the bad diode and calibrate.
73
Bruce-K1FZ
www.qsl.net/k1fz/pennantnotes.html
----- Original Message -----
From: "Pete Smith N4ZR" <n4zr@contesting.com>
To: "topband reflector" <Topband@contesting.com>
Sent: Friday, January 24, 2014 9:57 AM
Subject: Topband: End of a bias tee adventure?
After making all of the recommended changes, I hooked up my MFJ and got
>650 readings regardless. When connected to a 75 ohm dummy load, it
reads completely normally, as does shorting the input (R=0_ If I had
managed to damage the MFJ with DC voltage on the input, would you expect
no readings at all (>650 everywhere)?
--
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
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