test-drb April 2001

test-drb@ccmp.vtda.org

251 participants
669 discussions

RFO: HP 85/Rocky Mountain BASIC replacement

by mcguire＠neurotica.com

On April 20, John Ott wrote: > My HP 85 is growing long in the tooth. I want to replace it with > something more modern BUT just as reliable/dependable (e.g. doesn't > crash). I'm afraid when it does break I won't be able to find parts to > repair it. It's being used in a working research lab. I use it to > control a rack of electronic gear (e.g. frequency synthesizer, dynamic > signal analyzer, network analyzer, etc.) so I don't need anything fancy > just bullet proof and reliable. This means windows and macs are out. > > What's your opinion. If you want something just as reliable I'd stick with the HP85. Pick up a few more at hamfests or on eBay to use as spares in case you cook one. In my opinion, nothing made today can touch the stability or reliability of that platform by a longshot. -Dave McGuire

25 years

What's a Mag Card II?

by xds_sigma7＠hotmail.com

Hell, I'd pay them twice that for it... I've wanted one of those for a loooong time... Will J _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com

25 years

SOmebody needed an SMD cable?

by jeff.kaneko＠juno.com

I have a couple of the 60-wire control (twisted pair) cable about three feet long. If you need the data cable, LMK, and I'll try to get one for you. I can also get *REALLY* long 60-wire cables, also. Jeff ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj.

25 years

DEC PRO-300 P/OS Floppies

by jeff.kaneko＠juno.com

Version 1.7. Looks like a complete set. Anybody want these? They are original. Reply via private e-mail. Jeff ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj.

25 years

Xerox ViewPoint Font pack

by jeff.kaneko＠juno.com

I have a box of about 12 8" floppies, which appear to be screen fonts for ViewPoint 2.0. Anybody need these? Make me an offer . . . Jeff ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/tagj.

25 years

DEC NICSA console

by broth＠heathers.stdio.com

Has anyone ever heard of a DEC NICSA console board? It was part of a backplane with two protocol translation boards, a 1 meg MS-11, 11/24 CPU, and a DEUNA. Brian. -- Brian Roth - System Administrator www.webwirz.com - Old Computer Repository Preoccupation is my main occupation.....

25 years

DEC (Minc 11?) RX01 disks and PUTR

by ajp166＠bellatlantic.net

From: Don Maslin <donm(a)cts.com> >The DD part sounds rather like what Altos used on their 8" DD disks, >and which no PC FDC that I know of can read. I doubt that they did >the SD header part though. Have to fire up my Sierra (Altos clone) >and see if it can read the RX02 stuff - or at least look at it with DU. I bet the altos can't. The mixed density format is something only DEC did. Intel also used M2FM (rather than MFM) for double density for the 2xx series development systems. it was also incompatable with everything and used 3000 series bit slice. Allison

25 years

VAX 6000 3-phase conversion (was: Re: Three Phase)

by cdl＠mpl.ucsd.edu

> Date: Fri, 20 Apr 2001 15:31:36 +0000 > From: Gunther Schadow <gunther(a)aurora.regenstrief.org> > To: Sridhar Ayengar <sridhar(a)ikickass.org> > CC: port-vax(a)netbsd.org, classiccmp(a)classiccmp.org > Subject: VAX 6000 3-phase conversion (was: Re: Three Phase) > > > Let's look at the plan again: > > > ____________________ +300V > | | | > -__ -__ -__ thyristors > ^ ^ ^ > | | | > L1 ------* | | > L2 -----------* | > L3 ----------------* > | | | > - - - diodes > ^ ^ ^ > | | | > --------------------- Return > > > ---- FOR 220 V SINGLE PHASE ----------------------------------------- > > With a 220 V single phase power supply (P and N coming out of your > receptacle,) as in Europe, Australia, India (?), etc. all you would > need to do is, e.g., put P on L1 and N on L2. That gives 220 V ~ > input and if this sqrt(2) rule is correct (which I'm still a little > confused about) you get 220V * 1.414 = 311.8 DC, i.e., just right. > > ---- FOR US 2 x 110 V TWO PHASE ------------------------------------- > > For the US I am thinking that may be the 2 phase 220 V dryer hookup > is the best way to go. Not only is this line at a convenient location > where you can store a big cabinet like this one, it is also well > dimensioned to sustain a VAX or (and may be AND) your dryer. Otherwise, > just dry your clothes on a line. But do not mistake the VAX's blower > with your front-loading washer :-). > > Seriously, the two phases here, as I understand it, are: > > ------- P1 > ------- N > ------- P2 > > with U peek = 110 V and the phases of P1 and P2 being displaced by > 180 degree. So, if you measure U between P1 and P2 you get 2 x 110 V > = 220 V. So, I would then connect it like this: This is really 220v single phase. And the 110 refers to the nominal RMS voltage. Nearer to 120 these days. The peak voltage is, of course about 1.4x the RMS. > > ____________________ +300V > | | | > -__ -__ -__ thyristors > ^ ^ ^ > | | | > P1 -L1 -----* | | > (N)-L2 ----------* | > P2 -L3 ---------------* > | | | > - - - diodes > ^ ^ ^ > | | | > --------------------- Return > > I am not sure whether to use N on L2 or leave N open (again, I > notice how much I forgot about my high school physics.) This actally > bugs me, because I don't know quite where to connect to the ground > potential and how to deal with the protective ground here. I would strongly advocate leaving one of the three inputs (L1, L2, L3) open, and connect the other two to P1 and P2. This makes a full-wave controlled bridge rectifier across the "220" line. The peak voltage (hence the no-load DC output) would be 220 sqrt(2), about 340V. The DC output is floating with respect to protective ground, but will be isolated by the transformer in the switching supply that runs from the nominal 300V. carl (amateur electrician) -- carl lowenstein marine physical lab u.c. san diego {decvax|ucbvax} !ucsd!mpl!cdl cdl(a)mpl.ucsd.edu clowenstein(a)ucsd.edu

25 years

FS: IBM 6157 external tape drive and heaps of tapes - System/36??

by rhblake＠bigfoot.com

I have just come across an external tape drive that appears to be in good shape with a huge box of DC-300 tapes, 60 of them. All appear to be used, all but a few are in plastic cases. It all looks to be in good shape and the tapes came in a box marked "System 36 tapes" and to the best of my recollection that's what the tape drive goes to. Any offers? The drive is light but the tapes probably weigh 40 lbs. I'd ship it by UPS gorund so it's cheaper. At present I'd prefer to stay with shipping in the US. Drop me a note direct to rhblake(a)bigfoot.com

25 years

What's a Mag Card II?

by Innfogra＠aol.com

In a message dated 4/20/01 8:43:14 PM Pacific Daylight Time, fernande(a)internet1.net writes: > What is it? I doubt they'll ever sell it, as they have it at $59!! Far to high a price. It is an IBM Selectric electromechanical typewriter attached to magnetic card read/writer for storage. Proprietary IBM chips. Paxton

25 years

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test-drb April 2001