The module's pins fit into the little gold cups which are soldered to the
traces. It is an individual "socket" for each pin.
The Ty-wrap is to insure the module doesn't pop out during shipment.
Regards,
mitch
----- Original Message -----
From: "Joseph Gray" <[email protected]>
To: "Discussion of precise voltage measurement" <[email protected]>
Sent: Friday, August 02, 2013 10:20 PM
Subject: [volt-nuts] VS 330 circuit board oddity
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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