Value of 7-track TU10

[Paul Anderson]

The backplanes are the same for master and slave.

On Mon, Sep 19, 2016 at 7:58 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:

>     > From: William Degnan
>
>     > I found the doc somewhere months ago sorry I can't remember where. I
>     > will upload to my site if I get a free moment and it's still on my
>     > computer.
>
> Thanks; that would be great. I already did find online the TU10 Maintenance
> Manual (EK-TU10-MM-007), the TU10M Master System Manual (DEC-00-TU10M-D),
> and
> the TU10 Engineering Drawings, so we're pretty well set for these drives,
> but
> it would be good to have DEC-00-TU10S-DC too.
>
>
>     > $2000 if clean.
>
> Wow. I saw a pair of H960's, a pair of CDC 92185 tape drives, 3 Fuji
> MiniEagles and an 11/23 go for $1.5K on eBait recently:
>
>   http://www.ebay.com/itm/161928600660
>
> Now, those are streaming drives, not vacuum column, but still - why is the
> TU10 worth so much more?
>
>     > Master unit double that price.
>
> I find this even harder to understand. The only difference between the two
> is
> that the Master has 7 dual Flip Chips (M640, M891, M7673, M7672, M892,
> M895,
> M7671) and 3 single Flip Chips (M100, M896, M958) that the Slave doesn't
> have.
>
> (The backplane is, as far as I can tell, wired for both - the wire list
> given
> in the prints is for the master, and I don't see a second Slave-only
> wire-list. Yes, perhaps some early Slave drives had a Slave-only backplane,
> but that's just a guess. If someone who has a Slave drive can check their
> backplane to see if slots 6-15 are wired, that would be very useful to
> know.)
>
> Yes, the full set of 10 Flips Chips would be hard to find, but I have a
> hard
> time seeing them being worth $200 each...
>
>         Noel
>