[vcf-midatlantic] May Repair workshop
DBC1964 at cox.net
Tue May 18 13:57:35 UTC 2021
Some of the pin counts in the middle range 18-24 come in both .3" or .6"
pitch. Wire Wrap sockets are handy for prototyping.
On 5/18/2021 9:44 AM, David Gesswein via vcf-midatlantic wrote:
> 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:
>>> I’m ordering sockets for CDL stock / is there a specific type that is
>>> preferred ?
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