"Stan Veit's History of the Personal Computer" audiobook podcast, chapter
4 http://bit.ly/izfPBD Loads a little slow - subscribe @ iTunes
I would just like to bring this to everyone's attention. It is such a
great book, and I have completed another chapter. I intend to start
getting new chapters posted much sooner. Please also consider reading
about Stan in the article I wrote last year, "Remembering Stan Veit" at
http://classiccomputing.com/CC/Blog/Entries/2010/9/3_Stan_Veit.html
Best,
David Greelish, Computer Historian
President, Historical Computer Society
Classic Computing
The Home of Computer History Nostalgia
http://www.classiccomputing.com
Retro Computing Roundtable podcast
Stan Veit's History of the Personal Computer audiobook podcast
Classic Computing Show video podcast
Classic Computing Blog
>
> The guidance I have had is that for a PSU an analogue 'scope is fine.
> For
> logic then a logic analyser is what you need. Are you talking about
> some
> other category of hardware?
>
> Regards
>
> Rob
>
IMO, keep it simple for the moment. If you are not used to using a
'scope and you are only intending to repair your PSU at the moment, stay
with an analogue dual-beam 'scope with a bandwidth of 20 MHz or so.
There are excellent ones available cheap on eBay or other places.
Philips, Gould, Hameg or Kenwood made decent 'scopes. It will also do
fine for audio and even some video work, should the need arise. Learn to
use that, then if you really think you need something better, replace
it. Tektronix 465 is a lovely 'scope but IMO overkill for what you need
at the moment. OTOH, if you anticipate getting deeper into repairing
stuff, by all means get a Tex 465, 475. HP 180 'scopes are nice too.
/Jonas
On 5/24/11 11:45 PM, Brent Hilpert wrote:
>> Of course, just for vintage warm fuzzies, little can challenge an old
>> Tektronix scope. I recently acquired a Tek 561A from a friend locally.
>> Mmmm, vacuum tubes.... Turn on the scope, go get a beer while it warms
>> up, measure and test with confidence. -- Ian
>
> Our radio museum here has several old 500-series tek scopes that I'd
> love to refurbish and get working. There's a 4-channel plug-in in one of
> them, too. Size, maintenance and fan noise might make them not-so-great
> for regular use but it would be nice to be able to use them on occasion.
> I loved the crispness of the trace and the blue tint of the phosphor in
> the CRTs of that series. I wonder why Tek didn't continue using that
> phosphor.
The P11 phosphor was available on the 7000 series crates and the 400 series (455,465,475) portables as options. My 7844 has the pretty blue traces from the two-gun CRT as well as a 400 MHz backplane. I still make room and haul it out to make measurements requiring one of the off-the-wall plug-ins with which Tek populated that line of scopes.
-> CRC
On Wednesday, May 25th, at 2:01 CDT, Eric Smith wrote:
> Does it really surprise you that some people love old computers?
It doesn't surprise me that he loves his PDP-11. . . after all, who wouldn't ?
. . . but a Sony Vaio? That's just sick.
Hehe.
T
This fellow has multiple units of NOS Augat wire-wrap boards for $29.95 each.
Seems like a good price given what the gold scrappers are paying these days,
which is where they will likely end up if some vintage homebrew hobbyists
don't snap them up...
Item # 250823044454
http://cgi.ebay.com/Mupac-TLR8922-Proto-Board-Gold-Recovery-/250823044454?p…
--Bill
All,
I still have an office full of magnetic tapes that I need to
get rid of. If you need some, let me know. I'll box and mail to you
if you are willing to pay postage. I'll put the rest on eBay and/or
VCM soon if I can't give them away here, and if that doesn't do it,
I'll (sadly) trash them.
The tapes are reel-to-reel, mostly 10" full-size reels (~2500
feet of tape) but some smaller. Mostly 800 bits/inch, but some 1600.
Some Black Watch, many other brands. All are used; the data on them
is not proprietary or secret (a lot is UARS satellite data) but I
don't know generally what it is or what format it's in. Most reels
include the white surround clips with hooks to hang on racks. The
tapes are in pretty good-appearing shape, and were stored in
climate-controlled storage since new (I believe).
Shipping will be from San Antonio, TX, area code 78254.
Pick-ups welcome.
Please respond by email here, and tell me what you want. I
can't be much more specific than "soon" about when I'll start to
auction or trash, so promptness would be good (but tardiness probably
won't cost you much, if you are willing to prowl auction sites for
them).
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
If anyone's looking for a gonkulator cable for your DEC VAX, check out
Ebay auction number 200609594604
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
>> However, I am not sure 5-40 UNC screws are any easier to find (at
>> least not over here, as I said, even getting the 'mormal' 2-56, 4-40,
>> 6-32, 8-32 is difficult). And it's not 'right'. I might as well spend
>> a couple of afternoons in the garage making the right screws.
> There are some application-specific wierdnesses too. For example,
> tacquets on US-made piston valvesets for musical instruments are 3-
> 48. Fortunately, I do have a set of taps and a die for that
> thread.
??? 5-40, 3-48 etc. are all perfectly "normal" sizes (any decent hardware store will have them, although I wouldn't place any bets on finding the odd numbers at say Home Depot)
And Tony, maybe instead of calling it a 6-32 you would have better luck in the UK asking for a "computer case screw."
The demise of "decent hardware stores" is perhaps a different thread.
Tim.
> As for the pitch, I used those pitch guages which conssit of little
> strips of metal with accurately cut teeth in one edge. Alas my metric set
> doesn't include 0.6mm ( which is odd, since it's common for M3.5 screws),
> hut the imperial one that fits is 42tpi. 42tpi is about 0.605mm pitch. I
> could beleive 0.6mm (it's not that accurate after all). The 40tpi
> imperial gauge doesn't fit at all.
I'd still bet a donut, that a 5-40 would fit just fine for anything without a long engagement.
Tim.
Hi All,
I thought I would post to everyone at one time with this list rather than an
individual emails, for expediancy.
6 ea LA 120's with keyboards, it looked like only the #7 button missing from
1 keyboard
3 ea LA 120's w/o keyboards
6 ea Dual 8" floppy drives made by SMS
3 ea combo 8" floppy and 10 mb Hard disk by SMS
6 ea dual 10mb bernoulli drives (IOMEGA) (also have cartridges)
I also have 8" floppy drive media which was DEC formatted, though digging
that out might be a little challanging. I think there is enough stuff here
for everyone to get a little.
Phil
PS Please keep in mind that this stuff has been in a non-temp controlled
storage for at least 6 years!!!!