Reply to thread

Message

<blockquote data-quote="John Roberts" data-source="post: 67155" data-attributes="member: 126">Re: Uli Behringer of The Music Group Q&amp;AVery high internal operating temperatures can lead to premature loss of electrolyte in reservoir capacitors. 105&#039;C rated caps will help. While a minor quibble, the original ones were probably 85&#039;C. I don&#039;t think I&#039;ve ever seen 80&#039;C caps? 105&#039;C units are routinely specified for power amplifiers to help preserve their vital fluids. Elevated operating temp may cause subtle effects on LSI too. If logic timing was marginal at nominal temperatures, heat could nudge it out of it&#039;s sweet time window. I have seen early DSP/CODEC chip sets that misbehaved in similar circumstances when a number of hot running units were stacked on top of each other in a tight rack causing higher than expected internal temps in use. While the ICs are probably specified to work up to even higher temps, the internal device characteristics can change subtly. The unfortunate reality is the customers do not care who made the internal component that may be causing the misbehavior, they only see your name on the box. Good luck, sounds like you have a plan.&nbsp; JR</blockquote>

[QUOTE="John Roberts, post: 67155, member: 126"] Re: Uli Behringer of The Music Group Q&A Very high internal operating temperatures can lead to premature loss of electrolyte in reservoir capacitors. 105'C rated caps will help. While a minor quibble, the original ones were probably 85'C. I don't think I've ever seen 80'C caps? 105'C units are routinely specified for power amplifiers to help preserve their vital fluids. Elevated operating temp may cause subtle effects on LSI too. If logic timing was marginal at nominal temperatures, heat could nudge it out of it's sweet time window. I have seen early DSP/CODEC chip sets that misbehaved in similar circumstances when a number of hot running units were stacked on top of each other in a tight rack causing higher than expected internal temps in use. While the ICs are probably specified to work up to even higher temps, the internal device characteristics can change subtly. The unfortunate reality is the customers do not care who made the internal component that may be causing the misbehavior, they only see your name on the box. Good luck, sounds like you have a plan. JR [/QUOTE]

Verification