20 Aug
2007
20 Aug
'07
7:57 a.m.
A double-header hamfest weekend yielded a couple of vintage digital
logic trainer items. The first is one of those little wood boxes DEC
Logic labs, but who cares about that. The more interesting thing is a
book for the CDC logic trainer. From the pictures and writeups in the
manual, this box has no logic of its own, but is made to accept a
small number (20) of logic cards from a 1604. It mentions that it can
be lightly modified to take 3000 series cards as well.
Can Billy or Chuck add any comments? I have never seen or even heard
of this box before.
--
Will
20 Aug
20 Aug
8:16 a.m.
On 8/20/07, William Donzelli <wdonzelli at gmail.com> wrote:
A double-header hamfest weekend yielded a couple of
vintage digital
logic trainer items. The first is one of those little wood boxes DEC
Logic labs, but who cares about that.
_I_ care about it... I had the manual for one when I was about 12. I
learned digital logic on paper from it. I always wanted one, but the
books were much easier to find than boxes.
Every once in a while, I entertain making one of my own, but haven't
ever come up with an inexpensive and robust plug/connector scheme.
The more interesting thing is a
book for the CDC logic trainer. From the pictures and writeups in the
manual, this box has no logic of its own, but is made to accept a
small number (20) of logic cards from a 1604. It mentions that it can
be lightly modified to take 3000 series cards as well.
That _is_ more interesting. I am also curious to learn more.
-ethan
9:09 a.m.
From: "Ethan Dicks"
On 8/20/07, William Donzelli wrote:
I have one of these, and the wires with the plugs are a problem. Mine
came to me with only a few of these left, and I haven't been able to
replace them. For those who've never seen one (but care), there are
eyelets/rivets which are sized appropriately for a mini-banana plug,
set into the lab box to form the connection points. Then, a kit of
various lengths of wire is provided. The wires end on both ends with
something similar to the male pins from a large AMP connector or the
like. The thing is, they have an unusual tapered shape, rather than
a simple cylinder, which allows them to wedge into the eyelets nicely.
The pins appear to be brass, and the eyelets look like they might be gold
plated(?).
I (and probably others who own one) would love to get some more of the
wires, or at least a source for the tapered pins to make new wires.
If the tapered pins were available, I suspect brass eyelets could be
used for an inexpensive (and almost authentic) plug/connector scheme.
(Mini-banana plug hardware seems to be the antithesis of inexpensive!)
Vince
A double-header hamfest weekend yielded a couple
of vintage digital
logic trainer items. The first is one of those little wood boxes DEC
Logic labs, but who cares about that.
_I_ care about it... I had the manual for one when I was about 12. I
learned digital logic on paper from it. I always wanted one, but the
books were much easier to find than boxes.
Every once in a while, I entertain making one of my own, but haven't
ever come up with an inexpensive and robust plug/connector scheme. 
10:44 a.m.
I too would love to get a DEC trainer and have been looking for one sometime now.
John
-----Original Message-----
From: Ethan Dicks <ethan.dicks at gmail.com>
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Sent: Mon, 20 Aug 2007 10:16 am
Subject: Re: Logic trainer finds
On 8/20/07, William Donzelli <wdonzelli at gmail.com> wrote:
A double-header hamfest weekend yielded a couple of
vintage digital
logic trainer items. The first is one of those little wood boxes DEC
Logic labs, but who cares about that.
_I_ care about it... I had the manual for one when I was about 12. I
learned digital logic on paper from it. I always wanted one, but the
books were much easier to find than boxes.
Every once in a while, I entertain making one of my own, but haven't
ever come up with an inexpensive and robust plug/connector scheme.
The more interesting thing is a
book for the CDC logic trainer. From the pictures and writeups in the
manual, this box has no logic of its own, but is made to accept a
small number (20) of logic cards from a 1604. It mentions that it can
be lightly modified to take 3000 series cards as well.
That _is_ more interesting. I am also curious to learn more.
-ethan
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ethan.dicks＠gmail.com -
jthecman＠netscape.net -
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wdonzelli＠gmail.com