开云体育

You forgot you can buy the thing, put it in a box, and mail it out via
FedEx to a neighbor.

On Fri, Jul 16, 2021 at 3:05 PM Daniel Koller via groups.io
<kaboomdk@...> wrote:

Hey, just out of curiosity, what sorts of things does one find these days at the RAMS store?
Any vacuum tube stuff that someone dug up from storage, or retirees offices?
What are the prices like?
Is there a web page so one can see what it looks like in there?
These are not just idle questions. My wife and I are seriously considering visiting some family in the Portland area, but unfortunately, in August, not after Sept. 1. On the other hand, that's a good thing. I should not be allowed in surplus stores, flea markets, or junk yards. (The catch is they are my wife's relatives, so if I bring anything home, I will not be visiting Portland any more).
Dan
On Friday, July 16, 2021, 12:53:15 AM EDT, Magic_Smoke <jsymonds@...> wrote:

I got to answer my own question today, it's the 3rd Thursday of the month and I had the day off so I swung by. I found a sign next to the door that reads:
RAMS Country Store is currently closed due to COVID-19
Please check back September 1, 2021

Very exciting! I'm really looking forward to this bit of normalcy returning.

Glad you're alright. I'm sure the scopes will survive. They're built
to last. I wish you the best. Is there anything we can do to help you?

On Fri, Jul 16, 2021 at 4:24 PM Dr. Manfred K. Zeller via groups.io
<drmanfredzeller@...> wrote:

Yes my, I leave in Cologne- 15 Tek Scopes under water. But it could be
worse. About 100 people lost their live and others missing.Thanks to the
group in participating.
Greetings
Manfred
--
Dr.-Ing. Manfred K. Zeller
Hahnwaldweg 47A
50996 K?ln-Hahnwald
Deutschland

If you're going to replace the CPU only, make sure you get the correct socket-type for the replacement CPU.

There is no way to avoid progressing global warming unless the largest
single polluters are brought to justice - including jail time for
everyone involved. This means the full executive and top engineering
rosters of the largest corporations. Call me a socialist, but there's
no way this correction will happen in a fully free market. The mere
notion of free markets requires ignoring issues that happen not on the
market itself - such as pollution, global warming, etc.

This might help you



it's much easier to find PCI motherboards than PC/104+ ones.

On Fri, Jul 16, 2021 at 6:18 AM David C. Partridge
<david.partridge@...> wrote:

Not a dumb question, but changing the mobo in a Waverunner Xi is apparently somewhat of a challenge.

It also needs to work with XP embedded.

David
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of cheater cheater
Sent: 16 July 2021 03:47
To: [email protected]
Cc: TekScopes <[email protected]>
Subject: Re: [TekScopes] [HP-Agilent-Keysight-equipment] OT: Looking for a Pentium M765 (or maybe M780 - not sure it that will work)

This might be a dumb question, but why not get a different motherboard?

The usual ceremony

step 0. woah climate change is looking pretty bad right about now!
step 1. talk about doing green things and being green and totally against
climate change
step 2a. If you are a private person, adjust lifestyle and consumption
precisely not at all
step 2b. If you are a corporation, proclaim new growth targets to hit

Gets too depressing if you think about it for too long, so don't.

not-so-cheerful
Marian

I will check what I have for ram when I get back in the lab. I have a few
boxes full of the stuff. Of many types.

Eric

On Fri, Jul 16, 2021, 11:33 AM David C. Partridge <
david.partridge@...> wrote:

But I can get Crucial brand 1GB on eBay for about ?5 ... I didn't know the
price had dropped so far!

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of David C.
Partridge
Sent: 16 July 2021 16:31
To: [email protected]
Subject: Re: [TekScopes] OT: Looking for a Pentium M765 (or maybe M780 -
not sure it that will work)

Desktop type non-ECC

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Robert
Simpson via groups.io
Sent: 16 July 2021 15:17
To: [email protected]
Subject: Re: [TekScopes] OT: Looking for a Pentium M765 (or maybe M780 -
not sure it that will work)

David,
What length memory stick, laptop size or full size?
Bob

But I can get Crucial brand 1GB on eBay for about ?5 ... I didn't know the price had dropped so far!

Desktop type non-ECC

Yes my, I leave in Cologne- 15 Tek Scopes under water. But it could be
worse. About 100 people lost their live and others missing.Thanks to the
group in participating.
Greetings
Manfred
--
Dr.-Ing. Manfred K. Zeller
Hahnwaldweg 47A
50996 K?ln-Hahnwald
Deutschland

David,
What length memory stick, laptop size or full size?
Bob

Thanks,
I've ordered one.
Bob

Climate change? nah that's just a myth. Yeah right. And its only going to get worse in the next 5-10 years regardless if anything serious is done about it today. Which it is not.
That wheel is already spun up pretty good and it can't just be stopped cold. I can sometimes see 3-4 planes crossing path in the sky leaving contrails in the space of just 15-30 minutes.
Absolute madness how we are destroying our own environment.

Hey, just out of curiosity, what sorts of things does one find these days at the RAMS store??
?Any vacuum tube stuff that someone dug up from storage, or retirees offices??
What are the prices like?
Is there a web page so one can see what it looks like in there?
? These are not just idle questions.? My wife and I are seriously considering visiting some family in the Portland area, but unfortunately, in August, not after Sept. 1.? On the other hand, that's a good thing.? I should not be allowed in surplus stores, flea markets, or junk yards. (The catch is they are my wife's relatives, so if I bring anything home, I will not be visiting Portland any more).
? ?Dan

On Fri, 16 Jul 2021, Sergey Kubushyn wrote:

On Thu, 15 Jul 2021, John Miles wrote:

I'm almost 100% sure it is just a snafu that happens all the time and was
quite widespread back then when CAD didn't exist yet but leave 0.00001%
doubt of missing something.

Agreed, that is very weird. Same with those resistors... usually you try
to
minimize the number of BOM line items by consolidating resistors, but they
seem to have done the opposite here.

The LC BPF at the output of the A69 post-VR amp is also funky. On the
schematic, the inductors are 0.652 uH, 0.568 uH, 0.652 uH, 0.94 uH, 1.047
uH, 1.047 uH, and 0.94 uH, but in the parts list they are more
reasonable-looking values. Meanwhile, the capacitors are bog-standard 220
pF and 470 pF parts.

The filter could be explained by the engineering department getting a
little
too carried away with their new computer, or maybe they just measured the
parts they used and transcribed the values to the BOM without rounding.
Likely true for the "1.047 uH" toroids, but it doesn't explain the others,
and nothing explains CR3068 as far as I can tell. I wonder if it's an IP
protection feature. If Hickok or Lavoie or somebody like that were to
clone
the instrument, things would get awkward if they had to explain what that
diode was for in court. Similar to the practice of adding fictitious
towns
to a map to guard against commercial copying.

I doubt that IP protection guess. Back then they didn't have CADs and those
designs were not just computer files. It was a bunch of paper drawings,
mylar tape PCB designs and so on. Not even starting on somebody willing to
make verbatim copies, it was totally impossible even if somebody decided to
do that. There was no way to just COPY something back then. Yes, one could
take the Tektronix schematics (that were not secret and were included in
service manuals) and make a copy of their instrument. You still had to go
through entire cycle of at least re-drawing their schematics, then do
mechanical design, PCB layout (with Mylar tape or something like that) and
much more. There is no way one could do this using just dumb monkeys -- it
would require engineers. And such things like that diode or multiplying BOM
lines is almost impossible to miss -- it would've been noticed and fixed in
the process. That is not even starting on their proprietary chips and other
stuff that should've been somehow re-implemented.

It is not like you can just blindly copy [stolen] design files and do
something with your own label as it is possible today. It was way more labor
intensive back then and it required brains. Brains were an absolute
necessity back then. It is a handicap nowadays but back then things were
totally different...

BTW, I forgot to mention that actual board matches schematic exactly. Don't
know about those inductance values -- have absolutely no interest
desoldering and measuring those -- but actual parts are ALL there. There is
a CR3068 (something like 1N4148) right next to 'LS145 pins, that 2.2K
resistor in ONE place instead of 3.3K everywhere is actually a 2.2K one and
the rest is actually 3.3K and so on...

---
*
* KSI@home KOI8 Net < > The impossible we do immediately. *
* Las Vegas NV, USA < > Miracles require 24-hour notice. *
*

On Thu, 15 Jul 2021, John Miles wrote:

I'm almost 100% sure it is just a snafu that happens all the time and was
quite widespread back then when CAD didn't exist yet but leave 0.00001%
doubt of missing something.

Agreed, that is very weird. Same with those resistors... usually you try to
minimize the number of BOM line items by consolidating resistors, but they
seem to have done the opposite here.

The LC BPF at the output of the A69 post-VR amp is also funky. On the
schematic, the inductors are 0.652 uH, 0.568 uH, 0.652 uH, 0.94 uH, 1.047
uH, 1.047 uH, and 0.94 uH, but in the parts list they are more
reasonable-looking values. Meanwhile, the capacitors are bog-standard 220
pF and 470 pF parts.

The filter could be explained by the engineering department getting a little
too carried away with their new computer, or maybe they just measured the
parts they used and transcribed the values to the BOM without rounding.
Likely true for the "1.047 uH" toroids, but it doesn't explain the others,
and nothing explains CR3068 as far as I can tell. I wonder if it's an IP
protection feature. If Hickok or Lavoie or somebody like that were to clone
the instrument, things would get awkward if they had to explain what that
diode was for in court. Similar to the practice of adding fictitious towns
to a map to guard against commercial copying.

I doubt that IP protection guess. Back then they didn't have CADs and those
designs were not just computer files. It was a bunch of paper drawings,
mylar tape PCB designs and so on. Not even starting on somebody willing to
make verbatim copies, it was totally impossible even if somebody decided to
do that. There was no way to just COPY something back then. Yes, one could
take the Tektronix schematics (that were not secret and were included in
service manuals) and make a copy of their instrument. You still had to go
through entire cycle of at least re-drawing their schematics, then do
mechanical design, PCB layout (with Mylar tape or something like that) and
much more. There is no way one could do this using just dumb monkeys -- it
would require engineers. And such things like that diode or multiplying BOM
lines is almost impossible to miss -- it would've been noticed and fixed in
the process. That is not even starting on their proprietary chips and other
stuff that should've been somehow re-implemented.

It is not like you can just blindly copy [stolen] design files and do
something with your own label as it is possible today. It was way more labor
intensive back then and it required brains. Brains were an absolute
necessity back then. It is a handicap nowadays but back then things were
totally different...

---
*
* KSI@home KOI8 Net < > The impossible we do immediately. *
* Las Vegas NV, USA < > Miracles require 24-hour notice. *
*

Or the famous Cadence vs. Avanti EDA code lawsuit.? Very hard for Avanti to explain the exact same misspellings in the comments!? Sure you didn't steal Cadence's IP, Avanti!? Case closed.? ? ? ? ? Jim Ford?Sent from my Verizon, Samsung Galaxy smartphone

On Thu, 15 Jul 2021, Ed Breya via groups.io wrote:

Eh, there is NO logic needed. Wired OR is done without any diodes using
OC/OD outputs. And it is done like that at the very bottom of the schematic.
On the same 'LS145, just different 2 outputs.

There is no different biasing -- 2N2907 emitter is connected to +15V, 10K
from emitter to base, 10K to 'LS145 OPEN COLLECTOR output. When that output
is high, 2N2907 base is connected to its emitter and that 10K to 'LS145 OPEN
COLLECTOR output is just hanging in the air. Transistor is closed, no
collector current. When 'LS145 output is active (low), that 10K is grounded
and there is base current that makes transistor open fully, to saturation.
2N2907A has beta at least a hundred, so that base current is more than
sufficient for full saturation. Emitter is at +15V wrt ground so a diode
drop makes no difference.

The schematic is classical RF diode switch. No level shifting with diodes.
No special biasing -- it is either ~+15V or ~-15V. Plus/minus couple of
volts makes absolutely no difference.

Please, don't play a guessing game with trivial advices. Just look at the
schematic.

I'm 99.9999999% sure it is just a snafu caused by multiple people and even
departments working on that schematic before it reached manufacturing. There
is no sacred knowledge or black magic there, the thing is trivial.

If it is purely a (TTL) logic section, it could be that a little
diode-logic was added to save a gate package or such, and required a
little different biasing to assure proper levels. Often, a Ge or Schottky
diode could be used with a saturated transistor output to get a valid
TTL-low when isolation is needed, or a regular Si diode could work with
some biasing help.

---
*
* KSI@home KOI8 Net < > The impossible we do immediately. *
* Las Vegas NV, USA < > Miracles require 24-hour notice. *
*

I'm almost 100% sure it is just a snafu that happens all the time and was
quite widespread back then when CAD didn't exist yet but leave 0.00001%
doubt of missing something.

Agreed, that is very weird. Same with those resistors... usually you try to
minimize the number of BOM line items by consolidating resistors, but they
seem to have done the opposite here.

The LC BPF at the output of the A69 post-VR amp is also funky. On the
schematic, the inductors are 0.652 uH, 0.568 uH, 0.652 uH, 0.94 uH, 1.047
uH, 1.047 uH, and 0.94 uH, but in the parts list they are more
reasonable-looking values. Meanwhile, the capacitors are bog-standard 220
pF and 470 pF parts.

The filter could be explained by the engineering department getting a little
too carried away with their new computer, or maybe they just measured the
parts they used and transcribed the values to the BOM without rounding.
Likely true for the "1.047 uH" toroids, but it doesn't explain the others,
and nothing explains CR3068 as far as I can tell. I wonder if it's an IP
protection feature. If Hickok or Lavoie or somebody like that were to clone
the instrument, things would get awkward if they had to explain what that
diode was for in court. Similar to the practice of adding fictitious towns
to a map to guard against commercial copying.

-- john, KE5FX

If it is purely a (TTL) logic section, it could be that a little diode-logic was added to save a gate package or such, and required a little different biasing to assure proper levels. Often, a Ge or Schottky diode could be used with a saturated transistor output to get a valid TTL-low when isolation is needed, or a regular Si diode could work with some biasing help.

Ed