[Kenwood] TS-940 Display/PLL(?) Issue

[Garey Barrell]

Ed -

I thought the same thing, but according to a real Kenwood "expert" 
(John, KI4NR at LPC Wireless) the goop in the 940 is different than that 
in the 440, and is not a problem.  The 940 is more of a wax that melts 
while the 440 type has to be picked out with a tool!  John has done 
enough 940s that I figure if anyone knows, he does.   I think there is 
more information on John King's website, but I haven't been back there 
for a while.

He did a beautiful "restoration" of my 940 a few years ago and it came 
back working and looking like new.  Still running too!!  :-)

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>



ma.locksmith at juno.com wrote:
> Interesting statement.....  I thought ALL of the Kenwoods of that era had
> the "goop" problem....  :o)
>
> Of course, I've already given that info to John.....  but, I guess I'm
> wrong.  When did Kenwood change their process?  What did they end up
> using to replace the "goop"
>
> Ed
> K1ZOK
>
>
> On Sun, 17 Feb 2008 11:06:13 -0500 Garey Barrell <k4oah at mindspring.com>
> writes:
>   
>> John -
>>
>> Yes, that indicates that one or more of the PLLs is unlocked.   
>> Solder 
>> joints are first suspect, then alignment.  The 940 does NOT have the 
>>
>> potting compound problem of the 440.
>>
>> Lots of information at
>>
>> <http://homepages.ihug.co.nz/~jaking/TS-940_02.htm#_Toc100503113>
>>
>> 73, Garey - K4OAH
>> Glen Allen, VA
>>
>> Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
>> <www.k4oah.com>
>>
>>
>>
>> John Unrath wrote:
>>     
>>> Hi,
>>>
>>> I have a Kenwood TS-940. The frequency display tracks the 
>>>       
>> frequency as long as the display is changing. As son as I stop 
>> turning the knob, the display blanks. I believe that is an indicator 
>> of 'frequency out of range.' Could it be that the PLL is failing to 
>> lock? And short of looking for cold solder joints on the PLL board, 
>> is there anything else I can try first?
>>     
>>> Thanks,
>>> John Unrath
>>> K6JHU
>>>
>>>