Welcome to Boardsort™ - Learn - Sell - Profit -

Learn to properly Sort, Sell, and Profit from your electronic scrap material.
It is currently Thu Mar 28, 2024 1:56 pm


Post new topic Reply to topic  [ 4 posts ] 
Author Message
PostPosted: Tue Aug 17, 2021 2:28 pm 

Joined: Sat Nov 29, 2014 9:44 pm
Posts: 1138
Location: I'm right here :D
I know rhodium has been discussed in the forum for HDDs but are there any other read and/or write heads that would be worth noting what materials are typically used in them? I know, like rhodium, prices change so something may not be monetarily noteworthy right now but I like knowing stuff so maybe just trivially noteworthy would be fine.

The reason I ask is because I took apart another tape drive so am curious about this specific read write head but also get a lot of floppy drives so curious about those as well and any other drive anyone can think of.


Attachments:
File comment: Bottom
image.jpg
image.jpg [ 1.97 MiB | Viewed 2540 times ]
File comment: Applied Magnetics Corporation
image.jpg
image.jpg [ 1.89 MiB | Viewed 2540 times ]
File comment: Read/write
image.jpg
image.jpg [ 3.19 MiB | Viewed 2540 times ]

_________________
Here to learn more so I can recycle more
My grades are my own opinion and not an official grade from Boardsort
Top
 Profile  
 
PostPosted: Thu Sep 02, 2021 10:20 pm 

Joined: Sat Nov 29, 2014 9:44 pm
Posts: 1138
Location: I'm right here :D
Adding a few more examples, hoping Lostinlodos or someone might shed some light on the heads. I had been perusing some patents and found some interesting info from an online transcript of an interview with someone who worked on advancing storage capacity (sorry can't remember specifically who or what site) but hadn't run into specific info on the heads. I feel like search engines have a mind of their own and don't get me where I want to go like they used to; or maybe it's just me...

Anyways, there's a zip, 5.25 and 3.5 floppy drive read/write head as further examples. The zip drive looks an awful lot like a hard disk drive. I took a pic with the magnets just because I thought it was interesting.


Attachments:
File comment: 5.25 head
FB9CB809-A6C6-4B50-BC08-12BCAE1B4411.jpeg
FB9CB809-A6C6-4B50-BC08-12BCAE1B4411.jpeg [ 1.78 MiB | Viewed 2449 times ]
File comment: 5.25
2685C9D6-4B84-4978-ACB9-E1F354F008C9.jpeg
2685C9D6-4B84-4978-ACB9-E1F354F008C9.jpeg [ 1.9 MiB | Viewed 2449 times ]
File comment: 3.5" Front and back of head, this particular drive didn't have one of the heads attached to an arm like most I've seen.
6CCE602E-C4EE-4594-BA8E-61EA6EF72184.jpeg
6CCE602E-C4EE-4594-BA8E-61EA6EF72184.jpeg [ 2.07 MiB | Viewed 2449 times ]
File comment: Zip 3
35A8D162-0CBE-4E20-A1AE-80FFC5B66FC1.jpeg
35A8D162-0CBE-4E20-A1AE-80FFC5B66FC1.jpeg [ 1.73 MiB | Viewed 2449 times ]
File comment: Zip 2
6EBB1707-4F8E-4D4A-81DA-69D81EF6C6FE.jpeg
6EBB1707-4F8E-4D4A-81DA-69D81EF6C6FE.jpeg [ 1.88 MiB | Viewed 2449 times ]
File comment: Zip
9B58CF74-8C0A-49FF-B900-22A3732604C1.jpeg
9B58CF74-8C0A-49FF-B900-22A3732604C1.jpeg [ 2.07 MiB | Viewed 2449 times ]

_________________
Here to learn more so I can recycle more
My grades are my own opinion and not an official grade from Boardsort
Top
 Profile  
 
PostPosted: Fri Sep 03, 2021 1:54 pm 
Site Admin
User avatar

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 9751
Location: Low DOS
Zip drives are not. I don’t recall what the mineral was but it was a rare Earth. In the transitional side of them.
(A mineral with metal like properties).

I remember reading tape heads were once based on a cobalt system. Bot over time of use they would become permanently charged magnets and ruin tape cartridges. For the life of me I can’t recall the format but just before VHS and Beta there was a home tape format that used cobalt heads. That in practice quickly started blanking tapes.

Rhodium is Paramagnetic and as such makes a good source for very small week magnetic transfers.

There are a few rare Earth (and related) minerals that under charge become Paramagnetic, used in older systems (like Zip and Floppy based systems) that don’t require the same scale precision.

But we’re way beyond my study here. Para fero, dia, con, lol. Oh my.

_________________
42 6F 61 72 64 73 6F 72 74 2E 63 6F 6D


Top
 Profile  
 
PostPosted: Fri Sep 03, 2021 1:56 pm 
Site Admin
User avatar

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 9751
Location: Low DOS
Sorry for reply delay. I intended to look it up but the only book I have on magnetic recording is an ascii writeup over 2000 pages long. :facepalm:
Bing is less than helpful here. So the above was my quicker response.

How It Works had an episode block on cassette players but I’m having trouble finding it.

_________________
42 6F 61 72 64 73 6F 72 74 2E 63 6F 6D


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours [ DST ]


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to: