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Re: CalAmp 130215 Comb Filter



Hi Roger:

The two shims should be placed on the ledge where you show them in your 
photo.  However, they should be stacked on top of each other, and 
centered on the end of the middle element of the filter.

73,

Woody
KJ4SO


----- Original Message ----- 
From: "Roger Kolakowski" <rogerkola@aol.com>
To: <amsat-bb@amsat.org>
Sent: Friday, June 10, 2005 2:16 PM
Subject: [amsat-bb] CalAmp 130215 Comb Filter


> Well curiosity killed the KAT....
>
> I had to take the cover off the input filter...BTW...two shims will 
> fall
> out, would the next explorer please let me know where they were 
> supposed to
> go originally...
>
> The filter is not etched into the board like other styles of 
> downconverters
> we have seen, it is actually a copper extrusion sliced about 5/32" 
> thick and
> floats in a "cavity" for want of a better word, built into the 
> casting. The
> tuning screws are theaded through the cover which goes over the 
> cavity, and
> are aligned with each finger.
>
> There are two long "grounding screws" which run between the outside 
> two
> fingers. Not much care was taken by the assembler to keep these 
> vertical, so
> if you have a "dead" converter you might want to check to see if one 
> of
> these screws has come in contact with a finger.
>
> Again, the two shims that will fall out are maybe 1/8 x 1" 
> copper...some
> adventurer please let me know where they go....
>
> I have added a picture of the filter to the other 3.
>
> One last note...the original board part number was 130038/B and 130217 
> is
> hand marked below it.
>
> Roger
> WA1KAT
> ----
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----
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