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Re: HP 10638a degausser

BE
Bill Ezell
Mon, Jul 24, 2023 6:50 PM

I went ahead and put the zip in my Google Drive share, here's the link:
https://drive.google.com/file/d/11d-Zr5lsdPibUvvNgWGhUFuTFCItxuII/view?usp=drive_link

Bill

On 7/24/2023 2:45 PM, Bill Ezell wrote:

I did the degausser replacement way back as noted. I still have all
the files.

I did follow the design of the original HP version to a fair extent,
hence it uses an RC analog decay generator, relays, and such.

The microprocessor it used is obsolete, you might be able to find one,
or do a minor redesign to use a modern one, or just use one of those
tiny ESP all-in-one boards with some software tweaking.

Also, the relays called out have polarized coils. I had the polarity
swapped on the coils in one version of the pcb, I don't remember if I
corrected that. In any case, the relays aren't critical, pick whatever
you want to use that will fit.

Gmail won't let me send a zip. I hate facist mail systems. If you want
it, email me and I can set up a dropbox share or some such.

Bill

--

Bill Ezell

All ducks quack. All ducks waddle. But, few quote Tennyson.

--
Bill Ezell
All ducks quack. All ducks waddle. But, few quote Tennyson.

I went ahead and put the zip in my Google Drive share, here's the link: https://drive.google.com/file/d/11d-Zr5lsdPibUvvNgWGhUFuTFCItxuII/view?usp=drive_link Bill On 7/24/2023 2:45 PM, Bill Ezell wrote: > > I did the degausser replacement way back as noted. I still have all > the files. > > I did follow the design of the original HP version to a fair extent, > hence it uses an RC analog decay generator, relays, and such. > > The microprocessor it used is obsolete, you might be able to find one, > or do a minor redesign to use a modern one, or just use one of those > tiny ESP all-in-one boards with some software tweaking. > > Also, the relays called out have polarized coils. I had the polarity > swapped on the coils in one version of the pcb, I don't remember if I > corrected that. In any case, the relays aren't critical, pick whatever > you want to use that will fit. > > Gmail won't let me send a zip. I hate facist mail systems. If you want > it, email me and I can set up a dropbox share or some such. > > Bill > > -- > > Bill Ezell > > All ducks quack. All ducks waddle. But, few quote Tennyson. > -- Bill Ezell All ducks quack. All ducks waddle. But, few quote Tennyson.