11 Dec
2012
11 Dec
'12
8:37 p.m.
On Tue, Dec 11, 2012 at 8:17 PM, Chuck Guzis <cclist at sydex.com> wrote:
On 12/11/2012 03:34 PM, Ethan Dicks wrote:
I'm sure they must have made a 220VAC model, but I've only ever seen
the 110VAC type (sample size > 2)
The 11/750 was physically smaller, used 110VAC...
limited initially
to 2MB (later 8MB, then finally 14MB)...
We ran ours on 208V, I think we had 4MB; we used a Fuji Eagle drive and a
CDC cartridge drive for disks and a Cipher streamer for tape. It worked
pretty well. The 730, on the other hand, was something of a wimp.
I was offered one when
Sorcim dumped theirs and I refused it. Microprocessor technology was
catching up too fast to consider giving it a home.
It's realllly slow (about 25% slower than the 11/750) but physically
small and only has 5 memory slots for 1MB boards.
Using TU58 as the console boot medium made booting even slower, but if
you copied all the files off of your tape (with EXCHANGE) and built a
new tape (also with EXCHANGE), you could order the files properly and
since the TU58 microprocessor appeared to cache the directory
track(s), loading was then sequential and *substantially* faster.
The 11/730 wasn't so bad if you used it like a single-user workstation.
-ethan
12 Dec
12 Dec
1:01 a.m.
On 12/11/2012 05:37 PM, Ethan Dicks wrote:
I'm sure they must have made a 220VAC model, but
I've only ever seen
the 110VAC type (sample size > 2)
It's been more than 25 years, so my recollection may be hazy, but I
think we had 208V 3-phase. I don't recall if it was delta or wye
configured, but I tend to think it was the former. CPU from one phase,
disk and tape drives from the other and our two big CDC line printers
from the third. But as I said, it's been over 25
years since the
electricians installed the stuff. We just went by what they
recommended.
--Chuck
13 Dec
13 Dec
1:55 a.m.
There were lots of them on 240v AC inn the UK
Regards
?
Rod Smallwood
?
?
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Chuck Guzis
Sent: 12 December 2012 06:02
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Old Unibus VAXen (was Re: eBay VAX-11/780 has a few minutes
left...)
On 12/11/2012 05:37 PM, Ethan Dicks wrote:
I'm sure they must have made a 220VAC model, but
I've only ever seen
the 110VAC type (sample size > 2)
It's been more than 25 years, so my recollection may be hazy, but I
think we had 208V 3-phase. I don't recall if it was delta or wye
configured, but I tend to think it was the former. CPU from one phase,
disk and tape drives from the other and our two big CDC line printers
from the third. But as I said, it's been over 25
years since the
electricians installed the stuff. We just went by what they
recommended.
--Chuck
4245
days inactive
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cclist＠sydex.com -
ethan.dicks＠gmail.com -
rodsmallwood＠btconnect.com