All them tubes!
How many tubes were in the SAGE? The module in the photo appears to have 8 tubes in it, with one missing. (Perhaps 8 bits + parity?) It would take a LOT to make say 16K Bytes of storage.
I have a "Main Read" module from the B-205 and it has 8 dual triode tubes, each working as a Flip-Flop, to provide 8 BITS of data storage.
The lighted push buttons in the upper left corner are of the same type as what we used on the "Quick Fix" HF Radio Consoles.
Back in the good ole days, tube computers, because of the requirement for so many tubes, were down almost as much as they were up.
P.S. - Is that you in the photo?
Mike Loewen wrote:
On Tue, 7 Oct 2008, Ray Sills wrote:
> The assumption is that the replacement modules are known to be good.
> It that's in question, then all bets are off.
> Presumably, in a mission-critical application like SAGE, there would
> be good spares on hand. Some large systems
> have test bench ways to determine operational quality off-line, so
> you'd know that your spare modules are OK.
Each SAGE facility had a repair shop with a pluggable unit tester, like
http://www.thegalle ryofoldiron. com/SGTESTER. JPG
PUs were repaired in-house.
Mike Loewen mloewen@cpumagic. scol.pa.us
Old Technology http://sturgeon. css.psu.edu/ ~mloewen/ Oldtech/
- This is the dumbest argument EVER.
Fairline: Herb takes history seriously. That's good. It doesn't mean the man lacks a funny bone.
Herb: Not everyone takes history quite AS seriously as you or I. That's good, too.
From: fairlanefastback <firstname.lastname@example.org>
Date: Sunday, Oct 12, 2008 8:58 am
Subject: [midatlanticretro] Re: Intel MDS on EBay Item number: 170268336762
--- In email@example.com, "Herb Johnson"
> So, I think the only loose thread, is why you were surprised when someof your remarks were taken more seriously than you expected. I presume
you will be less surprised about that in the future.
I'm not sure that I am willing to have to put *WARNING JOKE* or *
TONGUE IN CHEEK* as it seems would be required for you. A "LOL"
denotes a joke. And of course, one can always ask for clarification
if one isn't sure since written communications are not always as clear as the spoken word. Should I counter with a similarly demanding "I
presume you will be less likely to miss the meaning of a LOL or smiley in the future."? That reads like a declaration. Is there really
anything wrong with maybe being a little less uptight and a little
more civil perhaps? I really hope you ponder that for a moment.
This list, does it only want hardcore super serious guys? Thats not very inviting to guys less so I think anyway.
> One comment. I don't think much of using smiley's on statements, soone can later say "I was only kidding".
So a smiley or LOL is never sincere? Its only always meant to have a excuse later on that something was not meant seriously? If I read you correctly thats a pretty negative view and one you should not take on my usage of it.
Anyway I'll shut my mouth on this subject otherwise for the moment, just food for thought in return.
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