I once owned a Motorola D2 kit with 6800 micro. I thought that pin count
sounded familiar.
On Sun, Mar 4, 2018 at 7:52 AM Robert via cctalk
wrote:
> On Sun, Mar 4, 2018 at 6:40 AM, Noel Chiappa via cctalk
> wrote:
>
> > A couple of people have replied privately telling me it's for a Motorola
>
Someone had asked me about they were looking for Claude Shannon Bell Labs
publications for a display? Please email me off list
Thanks Ed Sharpe archivist for SMECC
> From: William Donzelli
> Germany often gets the short end of the stick when it come to radar
> tech in World War 2
For those who are interested in German radar, there's a good book:
David Pritchard, "The Radar War: Germany's Pioneering Achievement
1904-45", 1989
which
:> The high frequency power tubes were required for better spacial
resolution. My understanding was that major difference between the
German radar and allied was that the Germans had a single trace, like
a time domain reflectometer. The allies had a rotating image that is
similar to what we see on
> The one described in the RH is a "split anode magnetron". The note on
> it says that "frequency stability is not very good:.
Yes, but in World War 2 (and a little into the 1950s), split anode
magnetrons were used in ECM "jammer" transmitters.
> It's my understanding that the allies used the c
Will - But is that red tube the one used in the wireless set lend lease
transceiver with Russian lettering for the vhf section will? ( trying to
flash back 50 years.)
Ed#
In a message dated 3/4/2018 3:28:17 PM US Mountain Standard Time,
cctalk@classiccmp.org writes:
> A ve
> A very interesting story in this radar history is how the Dutch managed to
> rescue the EF50 tube, essential for these early radar receivers, to England
> just hours before the Germans invaded holland.
This is generally a good article, but has a major flaw or two.
One, it describes acorn tubes
heck and the split anode maggies made appearances in radio news in the 30s!
yow do bring up a good point of things being discovered but not revealed
at the very moment... have not studded that about maggies but many other
thing followed that crooked path though...
Ed#
In
> Ordinary magnetrons had indeed been around for a while; they were invented in
> 1920. The British invention was the _cavity magnetron_, a quite different
> beast; it was kind of a cross between a magnetron and a klystron, with the
> best features of each.
The cavity magnetron was invented by a l
> I dunno about these historical accounts.
Radar tech history is a real minefield, and my advice is to take any
historical accounts or studies that are older than ten or fifteen
years old with a grain of salt. Often a big grain.
"History is written by the victors" had been very strong with radar
I recently found a Heathkit card cage ( 85-2001 121476 on backplane ) with
a DEC M7270, M8044, M7946, and M8043. I still have a few Heathkit boards
buried here sonewhere.
Please contact me off list if you have any questions or wish to make an
offer.
Thanks, Paul
> From: Fritz Mueller
> Spring cleaning, Noel? :-)
Yeah, sort of! These came with a bunch of PDP-11 boards I bought on eBay,
and they're just clutter. More stuff coming soon!
Noel
> On Mar 4, 2018, at 11:09 AM, Noel Chiappa via cctalk
> wrote:
> OK, another pair of unknown extender cards:
Spring cleaning, Noel? :-)
OK, another pair of unknown extender cards:
http://ana-3.lcs.mit.edu/~jnc/tech/jpg/tmp/LargeExtender.jpg
If anyone has a use for one or both, FTGH.
They are 17"x10", and the support arms (nice touch) are about 3" long.
No identifying marks that I can perceive, alas. The power leads are titled
That was quick, this one came out of a 029 !!
Now to find someone who wants a 029 that needs a bit of work but is complete
On Sun, Mar 4, 2018 at 10:33 AM, Bob Rosenbloom via cctalk <
cctalk@classiccmp.org> wrote:
>
> On 3/4/2018 10:26 AM, Adrian Stoness via cctalk wrote:
>
>> some sorta drawer
On 3/4/2018 10:26 AM, Adrian Stoness via cctalk wrote:
some sorta drawer doubht its a chad catcher with a hole for a handle
as for what its from no idea
On Sun, Mar 4, 2018 at 11:54 AM, Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
Chad catcher from a PC05 paper tape punch?
some sorta drawer doubht its a chad catcher with a hole for a handle
as for what its from no idea
On Sun, Mar 4, 2018 at 11:54 AM, Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
> Chad catcher from a PC05 paper tape punch?
>
> paul
>
> > On Mar 4, 2018, at 12:40 PM, Pete Lancashi
Chad catcher from a PC05 paper tape punch?
paul
> On Mar 4, 2018, at 12:40 PM, Pete Lancashire via cctalk
> wrote:
>
> https://photos.app.goo.gl/ww7KPnPVexGJiqyE3
https://photos.app.goo.gl/ww7KPnPVexGJiqyE3
that is precious!
Ed#
In a message dated 3/4/2018 7:05:35 AM US Mountain Standard Time, d...@db.net
writes:
On Sun, Mar 04, 2018 at 12:45:10PM -, Dave Wade via cctalk wrote:
> >
> > A very interesting story in this radar history is how the Dutch managed to
> > rescue the EF50 tube, esse
It's too wide.
On 3/4/18 4:40 AM, Noel Chiappa via cctalk wrote:
> A couple of people have replied privately telling me it's for a Motorola
> EXORbus/EXORciser.
>
> Noel
>
The high frequency power tubes were required for better spacial resolution. My
understanding was that major difference between the German radar and allied was
that the Germans had a single trace, like a time domain reflectometer. The
allies had a rotating image that is similar to what we see on
Oh sh..l., It was a bit too quick
Apologies...
/Nico
- Original Message -
From: "ANDY HOLT via cctalk"
To: "General Discussion: On-Topic and Off-Topic Posts"
Sent: Sunday, March 04, 2018 3:52 PM
Subject: EF50 was Re: radar history
>E = 6.3v filament
> F = Pentode
> 5x = B9G base
>
> A
.. also known as Noval base
/Nico
- Original Message -
From: "ANDY HOLT via cctalk"
To: "General Discussion: On-Topic and Off-Topic Posts"
Sent: Sunday, March 04, 2018 3:52 PM
Subject: EF50 was Re: radar history
>E = 6.3v filament
> F = Pentode
> 5x = B9G base
>
> Andy
--
I am using
On 03/03/2018 04:48 PM, Noel Chiappa via cctalk wrote:
Hi, I'm not sure what kind of system this extender card
I suppose there's a chance that it's for a piece of test equipment or
something more analog in nature, and not computer at all - all sorts of
equipment in the '60s had a card/backpla
E = 6.3v filament
F = Pentode
5x = B9G base
Andy
On Sun, Mar 04, 2018 at 12:45:10PM -, Dave Wade via cctalk wrote:
> >
> > A very interesting story in this radar history is how the Dutch managed to
> > rescue the EF50 tube, essential for these early radar receivers, to England
> > just hours before the Germans invaded holland.
I heard this
On Sun, Mar 4, 2018 at 6:40 AM, Noel Chiappa via cctalk
wrote:
> A couple of people have replied privately telling me it's for a Motorola
> EXORbus/EXORciser.
Wasn't EXORbus keyed? I don't see a keyway in the photo.
Robert
>
> A very interesting story in this radar history is how the Dutch managed to
> rescue the EF50 tube, essential for these early radar receivers, to England
> just hours before the Germans invaded holland.
>
> Read here ( not my site ):
>
> http://www.dos4ever.com/EF50/EF50.html#war
>
> Jos
Wi
> From: Brian Marstella
> I have a CPU board with similar format that I bought thinking I'd
> eventually figure it out.
A couple of people have replied privately telling me it's for a Motorola
EXORbus/EXORciser.
Noel
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