[sdiy] Potting, was: Discrete OTA

[Tom Wiltshire]

On 5 Apr 2014, at 19:00, David G Dixon <dixon at mail.ubc.ca> wrote:

>>> I can see good reasons for something potted being better - 
>> more robust, better protection from the environment, more 
>> thermally stable and consistent, etc. What are the advantages 
>> of "no potting" beyond "repairability" (which should be a 
>> once in twenty years thing if it's done right).
>> 
>> Can a potted subcircuit be reflow soldered? If it can't, this 
>> would be a major drawback. More and more ICs these days come 
>> in LGA or similar packages that cannot be wave soldered let 
>> alone hand soldered. Components that cannot be reflow 
>> soldered on the same board would add to manufacturing cost 
>> significantly.
> 
> Let's just all agree:  Potting is for plants, not for circuits.

That proves it! You're using the wrong compound!

I bet your plants have all died too, haven't they?

T.