[sdiy] expo pair "heat shield?"

[Ben Riggs]

I concur with the use of regular silicon sealant, it’ll corrode the electronics (from experience, I’ve used it when I was young and dumb, had to fix the failure less than 12 months later).

There is silicon/silastic type sealants that are “ph neutral”, but even then they are probably the wrong thing for the task.

Ben.

Sent from my iPhone

> On 11 Oct 2022, at 8:11 pm, René Schmitz <synth at schmitzbits.de> wrote:
> 
> Hey Neil and all,
> 
> In principle it's not a bad idea especially if the mass and hence thermal inertia of your device is small.
> 
> E.g. a SMD dual transistor.
> 
> 
> I would vote against using regular silicone, the usual RTV stuff evaporates Acetic Acid, aka Vinegar.  Viva la corrosión!
> 
> 
> Hot glue or Epoxy seem good options to me. I've used both in with THT parts.
> 
> Mainly to mechanically couple tempco resistors to the dual transistor.
> 
> I've also used heatshrink, and a dab of thermal paste to isolate the KTY-81 in my VCO3s to the 2SC1583s.
> 
> 
> Best,
> 
>  René
> 
> 
>> Am 11.10.2022 um 07:23 schrieb Neil Harper via Synth-diy:
>> hey all,
>> 
>> just wondering if anybody thinks it's worth encasing an exponential pair
>> for stability. while this is in my modular case, there must be some heat
>> currents moving around from the other stuff that share the same space.
>> 
>> Maybe a dab of hot-glue-gun (hot snot), or a silicone or something?
>> 
>> I'd hate for it to bite me in the arse in the future, maybe corroding
>> the copper traces or the tin legs or becoming impossible to remove. What
>> do the pros use?
>> 
>> 
>> -- 
>> /// Neil Harper
>> /// Every Wave is New Until it Breaks
>> 
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