[volt-nuts] VS 330 circuit board oddity

[wb6bnq]

Hi Joe,

Actually those pins on the bottom of the board look like individual 
socket pins.  That is the  "801" amp may very well be a plugin type.  
That is the only reason I can see for tie wrap.

I would leave it alone, however, as I bet those "801" amps are probably 
NON-existent.  It would be a shame if you got carried away and something 
went wrong.

Bill....WB6BNQ

Joseph Gray wrote:

>Of course, before powering up the VS 330, I had to remove the covers and
>take a look inside. Everything looked intact and reasonably clean.
>
>You can tell that someone re-painted the top cover. It is glossy and
>smooth. The bottom cover is matte finish and textured.
>
>I did see one oddity on the circuit board. There is a broken nylon wire tie
>attached to the underside of the main circuit board. You can see it in the
>first picture here:
>
>https://dl.dropboxusercontent.com/u/19599147/VS%20330%20Board%20-%20Bottom.jpg
>
>Here is a picture of the top side. You can see that the holes straddle the
>801 amplifier module.
>
>https://dl.dropboxusercontent.com/u/19599147/VS%20330%20Board%20-%20Top.jpg
>
>You might think that perhaps the nylon tie was there to hold the amplifier
>module onto the board, but the module's pins are soldered. The way the tie
>is hanging, it looks to me that perhaps something was attached to the
>bottom side of the board, underneath the amplifier module.
>
>I'll have to email Krohn-Hite and request a manual. In the mean time, any
>guesses?
>
>Also, I am normally inclined to replace old electrolytic caps. Opinions on
>whether I should or shouldn't?
>
>Joe Gray
>W5JG
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