LGP-30 Memory Drum Update

Christian Corti cc at informatik.uni-stuttgart.de
Thu Jan 5 03:41:18 CST 2017

On Wed, 4 Jan 2017, Cory Heisterkamp wrote:
> I'm far from an expert, but it certainly looks like an oxide coating to 
> me. I'm reminded of the folklore when IBM was developing the RAMAC and

Yes, it is ferric oxide.

> http://www.radar58.com/temp/drum.jpg
> http://www.radar58.com/temp/drum2.jpg

Hmm, your drum doesn't look to bad after all. In your case I would clean 
all the heads, and the surface with a soft cloth and give it a try. For 
basic testing you only need one data track plus the register and timing 


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