Choice of iron powder toriod?
Graham W wrote:
Michael A. Terrell wrote:
Joerg wrote:
Hello Michael,
There is no reason to apologize for being good with analog. ;-) I
worked as a broadcast engineer during the time they announced the
first memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM
with very critical timing. I also did analog and digital work on
the microwave equipment built at Microdyne, before L3-Com closed
the Ocala plant.
Seems you started with digital stuff a year or two earlier than I
did. My first RAM had a whopping 1024 bits. Not bytes, bits.
21...something, I could look it up since the device where its in
still works.
2114? 1K * 4 bits?
Nah - 2102 1k * 1.
That was one early memory chip i don't recall using.
Had 8 of 'em in in my homebuilt Nascom 1 computer which with a
2708 UVEPROM for the 'monitor' was all the RAM for system and
user code and video store! Nevertheless, it was sufficient for a
machine code program to run 'Lunar Lander', hee hee.
Collins filters were regarded as the bees knees in UK ham circles
but I never could afford one!
The price was right, that day at the Dayton hamfest. ;-)
73 de G3VPC
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Michael A. Terrell
Central Florida
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