开云体育

On Mon, Dec 7, 2020 at 8:41 PM Chris K2STP <ccarrara@...> wrote:

Hey guys,
Just to be clear, I wasn’t really “criticizing” you guys for making fun of
the young generation... I get it, believe me. Hiring LOTS of IT technical
guys and gals over the years for me was a huge challenge, it was hard to
find folks that understood what was inside a desktop or laptop, they all
could tell me what app worked best, but it was hard to find people who
could troubleshoot and fix things! I’m 100% sure it’s 10 times worse in
the EE world, but I get it.

I was more just making pun of the fact it is being discussed in a forum
that was put up by YOUNG guys, who have designed an amazing new device
(both hardware AND software for it!). So they do understand more than we
give them credit for. While there are a lot of folks that don’t understand
anything inside the black boxes, there are also a bunch more young guys
that have an amazing breath of knowledge that I can’t say I ever had! Just
watch some of the physics and EE type stuff on YouTube put up by 20
somethings.... ;)

Now, off to make a new 6 meter antenna called a “barber pole” and test it
with the Nano!


--
Regards,
Chris K2STP

Il 07/12/2020 20:52, Clyde Lambert ha scritto:

Hello Piero,
I had to change the firmware and newer version of NANO-SAVER, but got it working.
Thanks to all for your help.
Now I just have to wait for a Android app for my smartphone. I can not always pack a PC around.
Will use existing setup in the shack.
Again thank you.
Clyde Lambert KC7BJE

On Mon, Dec 7, 2020 at 6:56 PM Larry Rothman <nlroth@...> wrote:

Yup, everything is computer and software-centric these days for college
and university students.
However, with that said, there are still some polytechnical colleges that
focus more on the practical than theory.
I think a lot of this has to do with children's early years and how much
practical knowledge was imparted to them by parents and teachers.
That really doesn't happen anymore - kids are given a video game and told
not to bother anyone.
The quizzical (bored?) kids that start to explore and find out how stuff
works - those will become the engineers & techs that are really good.
Oh, and Dave, you're not old - you're 'mature'.... ;-)
Cheers, Larry

On Monday, December 7, 2020, 1:26:34 p.m. EST, David Eckhardt <
davearea51a@...> wrote:

From another grumpy old fart (74 yo): Chris, I fully understand your
criticisms of 'making fun of the newbies'. It's not really making fun, but
our frustration with having no clue how the black box actually accomplishes
what it does inside the processors, ASICs, FPGA's, and...... - basic
electronics. I've interviewed many potential EE's who can not even
scribble Ohm's Law on the white board let alone actually use it to solve a
simple problem. If there is one single kernel of knowledge and
understanding that pervades all of the EE disciplines and repertoire of
'tricks', its Ohm's Law, either in its simplest form at DC or its most
complex (no pun intended) as applied to relativistic fields and waves in
the presence of a large gravitational field (well, beyond EE, but certainly
involved in graduate physics - its still Ohm's law, but riddles with
tensors and other ugly math). On my last job, I could not convince a
3-year on-the-job new engineer that a transformer at RF frequencies (in
this case, 13.56 MHz) did not require an iron core! He could not in his
training conceive how any transformer could possibly function without an
iron core! After a 2-hour attempt at trying to teach the basics of RF
transformers, I gave up at lunch time. Things like this are what
frustrates us old fossils who had to understand such things to earn our
diplomas and obtain jobs.

Much of this is due to the fact that "the basics" have been embedded in
applications that run on PC's and are no longer visible and addressable by
themselves. For example, the EE labs at CSU in Fort Collins, Co. (Fort Fun
for those of us retired from HP) no longer are lined with o'scopes, DMM's,
signal generators, test leads, soldering pens, or what evers, but rows and
rows of PC's with many simulation applications loaded and run by the
potential EE's-in-training. They no longer teach the basics, but learn how
to run the various simulation applications. As such, their careers are
limited by the lifetimes of the applications they learn. The real basics
of what they are 'learning' are hidden from view and buried within the
simulation applications.

My universal interview question in this respect is to pose a simple
resistor, source voltage, zener voltage, Zener problem. I give them source
voltage, zener voltage, zener dissipation, current draw from the zenered
voltage and ask them to calculate the required resistor. They typically
can't even draw the simple schematic, let alone have a clue on how to
address the resistor value. A very few can draw the schematic, but have no
idea how to calculate the required resistor, let alone the required
resistor dissipation. A more-or-less standard question at an HP interview
is to ask the interviewee to draw the schematic of a properly biased BJT
amplifier (bipolar transistor, if you will, the interviewee gets to choose
NPN or PNP). Most can not. This is so typical of potential EE's I
interviewed the last decade of my working for a living. This is why us old
farts and fossils shake our heads at what the schools are turning out as
degreed EE's. Personally, I place the blame on the schools.

Dave - W?LEV



On Mon, Dec 7, 2020 at 3:14 AM K2STP Chris <ccarrara@...> wrote:

LOL, seriously guys? I’m no young chicken at 57, but I’m also not a
dinosaur. I find it interesting the older generation makes fun of the

new

generation, on a forum site which was made for discussing the new
generations newly created wiz-bang test equipment (the NanoVNA) for which
the old generation is flocking to at un-precedented numbers likely never
seen before!

There was a time not too long ago, the “older generation” made fun of the
“new generation” of motor vehicle owners. “What might they use that

thing

for?”, “My horse only requires hey and water, no petrol or grease!”

“罢丑别

young kids these days don’t even know how to change a horse shoe!”

For the record, I was a programmer for many years and learned my first
language (Fortran77) on a Boroughs mainframe via punch cards. Looking
back, I wasted an entire semester running back and forth between the
building with the punchcard input machine to the punchcard creating type
terminals in the student lab. I could have learned a great deal more

just

using the green monochrome terminals we used the next semester! Lesson
learned? Look forward!! ;-))

--
Regards,
K2STP Chris

--
*Dave - W?LEV*
*Just Let Darwin Work*

On Monday, December 7, 2020, 1:26:34 p.m. EST, David Eckhardt <davearea51a@...> wrote:

From another grumpy old fart (74 yo):? Chris, I fully understand your
criticisms of 'making fun of the newbies'.? It's not really making fun, but
our frustration with having no clue how the black box actually accomplishes
what it does inside the processors, ASICs, FPGA's, and...... - basic
electronics.? I've interviewed many potential EE's who can not even
scribble Ohm's Law on the white board let alone actually use it to solve a
simple problem.? If there is one single kernel of knowledge and
understanding that pervades all of the EE disciplines and repertoire of
'tricks', its Ohm's Law, either in its simplest form at DC or its most
complex (no pun intended) as applied to relativistic fields and waves in
the presence of a large gravitational field (well, beyond EE, but certainly
involved in graduate physics - its still Ohm's law, but riddles with
tensors and other ugly math).? On my last job, I could not convince a
3-year on-the-job new engineer that a transformer at RF frequencies (in
this case, 13.56 MHz) did not require an iron core!? He could not in his
training conceive how any transformer could possibly function without an
iron core!? After a 2-hour attempt at trying to teach the basics of RF
transformers, I gave up at lunch time.? Things like this are what
frustrates us old fossils who had to understand such things to earn our
diplomas and obtain jobs.

Much of this is due to the fact that "the basics" have been embedded in
applications that run on PC's and are no longer visible and addressable by
themselves.? For example, the EE labs at CSU in Fort Collins, Co. (Fort Fun
for those of us retired from HP) no longer are lined with o'scopes, DMM's,
signal generators, test leads, soldering pens, or what evers, but rows and
rows of PC's with many simulation applications loaded and run by the
potential EE's-in-training.? They no longer teach the basics, but learn how
to run the various simulation applications.? As such, their careers are
limited by the lifetimes of the applications they learn.? The real basics
of what they are 'learning' are hidden from view and buried within the
simulation applications.

My universal interview question in this respect is to pose a simple
resistor, source voltage, zener voltage, Zener problem.? I give them source
voltage, zener voltage, zener dissipation, current draw from the zenered
voltage and ask them to calculate the required resistor.? They typically
can't even draw the simple schematic, let alone have a clue on how to
address the resistor value.? A very few can draw the schematic, but have no
idea how to calculate the required resistor, let alone the required
resistor dissipation.? A more-or-less standard question at an HP interview
is to ask the interviewee to draw the schematic of a properly biased BJT
amplifier (bipolar transistor, if you will, the interviewee gets to choose
NPN or PNP).? Most can not.? This is so typical of potential EE's I
interviewed the last decade of my working for a living.? This is why us old
farts and fossils shake our heads at what the schools are turning out as
degreed EE's.? Personally, I place the blame on the schools.

Dave - W?LEV



On Mon, Dec 7, 2020 at 3:14 AM K2STP Chris <ccarrara@...> wrote:

LOL, seriously guys?? I’m no young chicken at 57, but I’m also not a
dinosaur.? I find it interesting the older generation makes fun of the new
generation, on a forum site which was made for discussing the new
generations newly created wiz-bang test equipment (the NanoVNA) for which
the old generation is flocking to at un-precedented numbers likely never
seen before!

There was a time not too long ago, the “older generation” made fun of the
“new generation” of motor vehicle owners.? “What might they use that thing
for?”,? “My horse only requires hey and water, no petrol or grease!”? “罢丑别
young kids these days don’t even know how to change a horse shoe!”

For the record, I was a programmer for many years and learned my first
language (Fortran77) on a Boroughs mainframe via punch cards.? Looking
back, I wasted an entire semester running back and forth between the
building with the punchcard input machine to the punchcard creating type
terminals in the student lab.? I could have learned a great deal more just
using the green monochrome terminals we used the next semester!? Lesson
learned?? Look forward!!? ;-))

--
Regards,
K2STP? Chris

--
*Dave - W?LEV*
*Just Let Darwin Work*

On Monday, December 7, 2020, 1:29:21 p.m. EST, Leighton <leighton.judd@...> wrote:

G'day,

Apologies if this has been covered - however I have not been able to find anything in my search. I am wondering if others have come across an issue with errors in the lower frequencies of their scans.

I have a NanoVNA-H that has been great for the simple device that it is. I have been impressed with its capability. I thought that it would be a good idea to update the firmware as it came with version 0.2.3.

I downloaded the latest version from the github repository and set about updating the unit. All seemed a fairly straight forward process. I now have version 0.4.5 installed on the device.

I have been through the process of calibrating and keep on ending up with the same error at the low end of the sweep. I have attached an image of the plot for explanation. This is connected into a 50 ohm load.

Does anyone know why this is and how to fix it?

Thanks,
Leighton

On Mon, Dec 7, 2020 at 3:14 AM K2STP Chris <ccarrara@...> wrote:

LOL, seriously guys? I’m no young chicken at 57, but I’m also not a
dinosaur. I find it interesting the older generation makes fun of the new
generation, on a forum site which was made for discussing the new
generations newly created wiz-bang test equipment (the NanoVNA) for which
the old generation is flocking to at un-precedented numbers likely never
seen before!

There was a time not too long ago, the “older generation” made fun of the
“new generation” of motor vehicle owners. “What might they use that thing
for?”, “My horse only requires hey and water, no petrol or grease!” “罢丑别
young kids these days don’t even know how to change a horse shoe!”

For the record, I was a programmer for many years and learned my first
language (Fortran77) on a Boroughs mainframe via punch cards. Looking
back, I wasted an entire semester running back and forth between the
building with the punchcard input machine to the punchcard creating type
terminals in the student lab. I could have learned a great deal more just
using the green monochrome terminals we used the next semester! Lesson
learned? Look forward!! ;-))

--
Regards,
K2STP Chris