LGP-30 Memory Drum Update

Paul Koning paulkoning at comcast.net
Tue Jan 3 15:19:01 CST 2017

> On Jan 3, 2017, at 4:15 PM, Chuck Guzis <cclist at sydex.com> wrote:
> On 01/03/2017 12:57 PM, Cory Heisterkamp wrote:
>> Once I can make sense of the timing tracks, I think I'll proceed with
>> this. Not sure how I feel about using a micro-based solution though.
>> Just seems wrong : )   -C
> If enough working heads can be found, the drum probably can be
> remanufactured, as according to this:
> http://miriam-english.org/files/drum-computers/drum-computers.html
> the drum was nickel-chromium plated, not ferric oxide.   This is what I
> would have suspected, as coating equipment and binders would probably be
> a far cry from modern technology back then, where precision plating was
> already an established art.

Metal alloy plating seems common in fixed head disks also, at least in the ones from DEC I have seen.  Making a new drum sounds like a great class project for an ambitious machine shop student.


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