[Kenwood] Another filter question/problem

Sun Nov 5 10:15:09 EST 2006

John Geiger wrote:
>I just installed a Kenwood YK88C-1 filter in my TS690
>in time for the November SS (thanks to Associated
>Radio for sending it priority mail so I could have it
>by contest time). However, when I put the filter in
>line I have to turn the IF shift completely to the
>right to put it on the right receive frequency. It is
>fine with the filter out of line, where the IF shift
>is centerd, as it is supposed to be. Also, with the
>filter in line I was hearing some loud stations on the
>other side of the zero beat.
>>This is a used filter, so I have no idea as to its
>history, but anyone have an idea as to what is going
>on? Is it the filter or the rig that is out of
>alignment here? 
>>Guess it isn't my week for CW filters.
>>73s John W5TD
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>>>>I had a similar experience with an YK88C (might have been an 88CN) in my 
TS-450.
Although the AM and SSB filters have the same specs; the CW filters of 
the 88C and 88C-1 have slightly different center frequencies. You might 
check to be sure that you don't have a YK88C mounted on a YK-88C-1 
plug-in board. The two filters look identical and have identical 
connections but the centre frequencies differ - unfortunately I cannot 
remember by how much but I know I had to use the IF shift with mine.
Regards
Dave VE3HLU