Topband: End of a bias tee adventure?

[Bruce]

>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 at cox.net>
To: "Bruce" <k1fz at 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 at myfairpoint.net>
> To: "Pete Smith N4ZR" <n4zr at contesting.com>; "topband reflector" 
> <Topband at 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 at contesting.com>
>> To: "topband reflector" <Topband at 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
>>> ARC V6 or VE7CC DX cluster node.
>>>
>>> _________________
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>>>
>>
>> _________________
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>