Dieter VK3FFB (group owner) <dpelz@...> added the album FA-VA5 BNC connector soldering: This image was sent by Jan (SDR-KITS) to illustrate the required soldering of a critical BNC grounding pin.?
"I have seen this issue at least two or three times when FA-VA% Customers complained about poor quality measurements or VA5 locking up.
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The problem was found by me after a customer return of a faulty FA-VA5.
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This joint needs to be soldered from the top component side and needs a lot of heat, at least 60W iron with 3mm or 4mm wide solder bit.
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A badly soldered joint can play up after time because of strain on the BNC connector after regular use.
Although the BNC connector may still show connected to GND? via the backplane, measurement accuracy may suffer if the BNC ground terminal is
not making good contact with the top copper."
click on "Photos" left to see the image.
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