[cctalk] Re: Identify these drive read heads pdp11 related?

[Rick Murphy via cctalk]

On 5/30/2023 11:11 PM, devin davison wrote:

That would make sense, as I picked up 3 RK05 drives in the lot.


Having looked at the entire set, just the first few are RK05 heads. 
Rectangular white plug, and a metal shaft tail.


I didn't initially look at the full set and they're obviously from 
different drives.

   -Rick

[cctalk] Re: Identify these drive read heads pdp11 related?

[jim stephens via cctalk]

All of them are for various hard drives.  None floppy of any sort.

The first 4, 2840, 34, 21, and 09 all look like ones I'd use on a 
Western Dynex either 5mb or 10mb (capacity) drive.  100tpi or 200tpi.


The others are progressively higher density, someone else may recognize 
them.  Epay periodically has some guy listing them for high prices, and 
though I'd never pay what he wants if you can find his listings, they 
might be a good reference if noone else here turns up with an answer.


From the ages of the guys I knew in the 70s and 80s that serviced 
these, and their disposition of working on the hardware, they're 
probably all mid 70s, and not paying much attention to this sort of 
thing anymore.  They certainly knew the subject well, the ones I knew.


A fellow I knew ran AHMCO  (After Hours Maintenance, Company), which was 
well named, as when does this crap fail.  anyway, hopefully someone has 
either memory or knowledge of these.


I've got a few sets for my older Microdata Marathons, and Dynex drives 
in similar packaging.


On a side note from my experience, wish more companies had used the pink 
plastic for bagging boards, and this foam, as I've not seen any of it 
broken down like many types of foam.  And I'm talking about Los Angeles 
air, which kills anything plastic with ozone.


thanks
Jim

On 5/30/23 20:57, devin davison via cctalk wrote:

I picked up boxes of these disk heads when i picked up a warehouse
stockpile of pdp 11  computers.

Any idea what they are to? I want to say floppy? I have 2 different types
of heads, in boxes. Please see pics, and if anyone needs heads, im the guy
that has a bunch to part with now.

Let me know what kind of drive they are for if you can, i have no clue.

https://i.postimg.cc/nrHTdwcV/20230528-182840.jpg


https://i.postimg.cc/y8JjrRBR/20230528-182834.jpg

https://i.postimg.cc/sfcTBywM/20230528-182821.jpg

https://i.postimg.cc/2y2GgFVQ/20230528-182809.jpg

https://i.postimg.cc/4N2w5PCZ/20230528-182617.jpg

https://i.postimg.cc/W1Q8R4bH/20230528-182614.jpg

https://i.postimg.cc/28S2hJK2/20230528-182606.jpg

https://i.postimg.cc/25hwCf18/20230528-182555.jpg

https://i.postimg.cc/DZ3xGw9X/20230528-182543.jpg

[cctalk] Re: Identify these drive read heads pdp11 related?

[devin davison via cctalk]

That would make sense, as I picked up 3 RK05 drives in the lot.

Good to know what they go to now, perhaps i can sell some off to others
that need them, and offset the cost of the pickup

Thank you for the quick reply

--Devin D.



On Tue, May 30, 2023 at 10:49 PM Rick Murphy via cctalk <
cctalk@classiccmp.org> wrote:

> On 5/30/2023 9:57 PM, devin davison via cctalk wrote:
> > I picked up boxes of these disk heads when i picked up a warehouse
> > stockpile of pdp 11  computers.
> >
> > Any idea what they are to? I want to say floppy? I have 2 different types
> > of heads, in boxes. Please see pics, and if anyone needs heads, im the
> guy
> > that has a bunch to part with now.
> >
> > Let me know what kind of drive they are for if you can, i have no clue.
>
> Looks like RK05 heads to me. They have the right connector and tailpiece.
>  -Rick
>
>

[cctalk] Re: Identify these drive read heads pdp11 related?

[Rick Murphy via cctalk]

On 5/30/2023 9:57 PM, devin davison via cctalk wrote:

I picked up boxes of these disk heads when i picked up a warehouse
stockpile of pdp 11  computers.

Any idea what they are to? I want to say floppy? I have 2 different types
of heads, in boxes. Please see pics, and if anyone needs heads, im the guy
that has a bunch to part with now.

Let me know what kind of drive they are for if you can, i have no clue.


Looks like RK05 heads to me. They have the right connector and tailpiece.
    -Rick