Production rate was not the limiting factor. Testing was.
In order to avoid high warranty costs DEC used to burn in all terminals.
It's cheaper to fix equipment at the factory than send out a field service
guy to do warranty work.
DEC would set a MTBF goal. Let's say 5000 hours.
Then based on field feedback adjust the burn in time to obtain a 90%
confidence level of getting a 5000 hour MTBF.
I remember huge rooms full of glowing VT100's with people on bicycles riding
up and down the rows looking for failures.
Printer burn in was even more impressive. Huge numbers of LA36's with a flag
attached to the head that you could see going back and forth all together
running a slide test. Easy to spot when one stopped. Lord only knows how
much paper they used up.
?
Rod Smallwood (ex DEC Terminals Product Line)
?
-----Original Message-----
From: cctech-bounces at
classiccmp.org [mailto:cctech-bounces at
classiccmp.org]
On Behalf Of Paul Anderson
Sent: 05 April 2011 04:02
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Anyone got a VT52 they'd be willing to sell?
I recall reading that at the peak of production DEC was cranking
VT100's at a rate of 1 per minute.
Paul
On Mon, Apr 4, 2011 at 9:33 PM, Mr Ian Primus <ian_primus at yahoo.com> wrote:
--- On Mon, 4/4/11, Richard <legalize at
xmission.com> wrote:
Speaking of elusive... would also love to find a
Tektronix 4010, but...
I've actually found 4010s more readily than I have found
VT52s.? Been
looking for a number of years and still haven't come across
a VT52 at
an affordable price.? I've found a number of
4010/4014s at affordable
prices.
That's surprising - I've been looking for a Tek 4010 for a very long time,
and have only seen one for sale. It was on eBay and I missed out because
eBay timed out the login session, so when I tried to put in a bid at the
last minute it booted me back to the login screen.
It went for less than I was willing to pay, but at the same time, there's
no
telling what the other guy bid.
Granted, I don't have any automatic alerts set up to email me in case one
pops
up, which I suppose I have to do. I've only seen the one on eBay.
Of course, if anyone *has* a Tektronix 4010/4014 they're willing to sell,
I'd definitely be interested in buying it, but I just have not had the
opportunity.
VT52's, on the other hand, I've had opportunities in the past, but in both
cases, the seller flaked and dropped communication.
And VT100's - I've got a couple. They're uncommon, but there are
definitely a lot of them out there. I just wound up with another one last
week, along with two CIT-101's (clones), which I actually find more
interesting (and less common)
-Ian