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Message: <blockquote data-quote="John" data-source="post: 964879" data-attributes="member: 175005"><p>Update..... following your lead  ;)  and applying gentle heat all round ....   upon very close inspection of casing & pcb both sides a few things caught my eye.  On both lids  there was microscopic droplets present,  not water marks .... actual micro droplets.   Two places on the pcb were suspect.  A soldering iron burn on what looks like an inductor ? has been added at factory, see pic,  Performance degrade ??.  Three pins on pcb with one pin possibly making the finest contact to the other ??.   No signs of casing cracks,  F connector from outside to inside seems to be watertight.  After approx 30 mins and re-applying 18v supply, gain has risen to around 58.4 dBuV which is higher than it was yesterday.   it's on soak now drawing a steady 235mA.   Hmmmmmm</p></blockquote><p></p>