30-pin SIMMS

From: Russ Blakeman <rhblake_at_bigfoot.com>
Date: Wed Mar 3 15:50:35 1999

No worse than the DIP DRAM chips preceeding the SIPPS, and at least on a SIPP
you could see a bent pin unlike one that bent under on a DIP DRAM chip or any
other mucho-insertion-force item. They had it right on vacuum tubes-make solid
pins that are hardy and round. It was rare in my old radio days that I'd ever
bend a pin, especially on the HV tubes (you bend one of those and you really
f***ed up)

Richard Erlacher wrote:

> Originally, the SIPP was considered much more reliable than the SIMM. The
> SIMM sockets were a new product at that time and failure rates were pretty
> high, and it was easy to package a system more densely with SIPPs than with
> SIMM's. It was easy to bend the pins on the SIPP's, though, and retailers
> soon tired of having to hand-hold customers whose problems were simply bent
> pins, as, once bent, the pins tended to bend again and again until they
> were broken and repair was improbably if at all possible. Consequently,
> SIMMs, though less reliable but easier to install, and less likely, in
> either event, to sustain long-term damage took over the market.
> Ultimately, socket problems were defeated by persistence, educating the
> user public, and improved socketing technology.
>
> Dick
>
> ----------
> > From: Max Eskin <max82_at_surfree.com>
> > To: Discussion re-collecting of classic computers
> <classiccmp_at_u.washington.edu>
> > Subject: Re: 30-pin SIMMS
> > Date: Saturday, February 27, 1999 9:10 PM
> >
> > On Sun, 28 Feb 1999, Tony Duell wrote:
> > >A SIPP is exactly a SIMM with pins soldered on - even the pinouts are
> the
> > >same. And thus SIPPs suffer from bent pins, just like individual chips
> > >do. That's why they went out of fashion.
> >
> > But why did anyone attach the pins in the first place?
> >
> > --Max Eskin (max82_at_surfree.com)
Received on Wed Mar 03 1999 - 15:50:35 GMT