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Tech Head - The Technology Section
So changing from 12v Halogen to 12v LED (bollox ?)
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<blockquote data-quote="Vipersan" data-source="post: 960692" data-attributes="member: 325666"><p>So here are some temperature readings take(n) from the exposed pcb it having run hanging just under the downlight fitting for about 16 hours non stop..</p><p>LED in centre cluster 29.7 c</p><p>LED in outer cluster 28.8 c</p><p>one of the 43 ohm resistors .. 30.2 c</p><p>the bridge rectifier .. 30.4c</p><p>the pcb around the point of resoldering .. 35.1 c</p><p>These are minimum values as holding onto the pcb whilst checking temeratures for more than a minute was actually painful ..</p><p>yes the pcb is that hot ..</p><p>and remember it is now air cooled having no glass envelope..</p><p>So ..the question remains does the pcb get hot enough in a closed space to partially liquify certain solders ?</p><p>I'm guessing yes ..</p><p>The unclothed LED lamp pcb is not showing any signs of failing after 16 hours straight running ..</p><p>rgds</p><p>VS</p></blockquote><p></p>
[QUOTE="Vipersan, post: 960692, member: 325666"] So here are some temperature readings take(n) from the exposed pcb it having run hanging just under the downlight fitting for about 16 hours non stop.. LED in centre cluster 29.7 c LED in outer cluster 28.8 c one of the 43 ohm resistors .. 30.2 c the bridge rectifier .. 30.4c the pcb around the point of resoldering .. 35.1 c These are minimum values as holding onto the pcb whilst checking temeratures for more than a minute was actually painful .. yes the pcb is that hot .. and remember it is now air cooled having no glass envelope.. So ..the question remains does the pcb get hot enough in a closed space to partially liquify certain solders ? I'm guessing yes .. The unclothed LED lamp pcb is not showing any signs of failing after 16 hours straight running .. rgds VS [/QUOTE]
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Tech Head - The Technology Section
So changing from 12v Halogen to 12v LED (bollox ?)
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