foam in DEC SBB drives, ok to remove?

Mike Stein mhs.stein at
Sat Nov 29 15:37:34 CST 2014

I had a number of ceramic ICs with gold pins in old anti-static foam; ate 
the pins right off.
----- Original Message ----- 
From: "Nigel Williams" <nw at>
To: "General Discussion: On-Topic and Off-Topic Posts" 
<cctalk at>
Sent: Saturday, November 29, 2014 4:09 PM
Subject: Re: foam in DEC SBB drives, ok to remove?

> On Sun, Nov 30, 2014 at 3:51 AM, Fred Cisin <cisin at> wrote:
>> Not only does it get crumbly, there is sometimes an intermediate stage
>> where it smells like vinegar, and is a strong acid.
> ick! thanks for the tip, will get right on it.
> The most egregious use of foam I've encountered was in a token ring
> hub, where a block of foam was use to support the small PCB which ran
> the width of the hub. The PCB held the relays that sit behind the
> sockets, of course with the foam atomized the PCB was swinging around
> on the wires. 

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