[vcf-midatlantic] May Repair workshop

David Gesswein djg at pdp8online.com
Tue May 18 13:44:18 UTC 2021


I'd add some 20 pin also. Common for 8 bit bus chips like the '245. Also 
if you can get them at a reasonable price I like the machine pin sockets. 

On Tue, May 18, 2021 at 09:11:23AM -0400, Jeff Salzman via vcf-midatlantic wrote:
> If you are referring to IC DIP sockets, I will interject my
> opinion/recommendation on sockets to have on hand.
> 
> 8, 14, 16-pin sockets are very common, as they are used for logic, some
> RAM, and timer ICs.
> 
> 18-pin sockets are used for a few specialty ICs in vintage systems,
> primarily for GAL/PAL chips.
> 
> 24-pin sockets are used for some special function ICs
> 
> 28-pin sockets are useful for many EPROM chips and Z80 interface chips.
> 
> 40-pin sockets for many 8-bit CPUs
> 
> 64-pin sockets for many 16-bit CPUs, like the Motorola 68000.
> 
> For best results, they should be "double-wipe" (or dual-wipe) DIP sockets.
> There are "single-wipe" sockets, but they are not as reliable.
> 
> If I had to guess what would be a good quantity assortment, in an armchair
> expert opinion sort of way, I would say that out of a quantity of 100
> pieces, the following breakdown might be useful:
> 
> 15x 8-pin
> 20x 14-pin
> 25x 16-pin
> 5x 18-pin
> 10x 24-pin
> 10x 28-pin
> 10x 40-pin
> 5x 64-pin
> 
> That ratio is certainly subject to other people's informed opinion. I am
> only breaking down the ratio based on what I've dealt with over the years.
> 
> Jeff Salzman
> 
> On Tue, May 18, 2021 at 8:48 AM Martin Flynn via vcf-midatlantic <
> vcf-midatlantic at lists.vcfed.org> wrote:
> 
> > Dean,
> > I’m ordering sockets for CDL stock / is there a specific type that is
> > preferred ?
> >
> > Martin
> >
> >
> >


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