Date   
Re: TEK 2247A eBay Special

Mike Langley
 

Thanks so much Andrew, for that tip. I will do more testing when I get a break from the regular work.

Re: 2454B 400MHz gives just about 300 MHz BW

Joe
 

As a general rule I stay clear of "refurbished" technology items listed on
eBay just for this reason, and prefer to take my chances on as is sales
provided pictures are of the exact item for sale. Most sellers are honest
and are only interested in quickly moving the item they typically acquired
as lots at tech companies and government auctions. Does not mean that I do
not get burned occasionally. It takes time and effort to thoroughly
checkout received equipment claimed to be fully functional, but for the
most part, I can do a quick check out of the item upon receipt to the
extent that I will be using it. This situation with the 2465s would be
difficult to catch without knowing someone's previous experience with an
unscrupulous seller.

Joe

On Mon, Oct 2, 2017 at 3:32 PM, David @DWH [TekScopes] <
TekScopes@...> wrote:



On Mon, 2 Oct 2017 15:33:01 +0100, you wrote:

On 01/10/17 16:37, Chuck Harris cfharris@... [TekScopes] wrote:

I have personally had this happen to all of the well deserved
negative feedback that I have given. I give maybe one every
two years. They never stick, I rarely bother anymore.

You can't believe his customers are that stupid?
Not every customer can be expected to be expert in Tek scopes,
and those that aren't probably won't know about this group.
This comes up all of the time for novices looking for an inexpensive
used oscilloscope. There are plenty of them out there but it takes
experience or specialized knowledge to know what to look for which
makes a new but more expensive instrument a better deal for them. So
perhaps counter intuitively, an expert can spend less and get more
than a novice can.

Even I did not know what to look for in a 2465 series oscilloscope
when I went oscilloscope hunting a couple years ago. But I had enough
general knowledge to know exactly what I was looking for and lucked
out that it did not include a 2465 series.


[Non-text portions of this message have been removed]

Re: Some Oscilloscope Humor

Chris Elmquist
 

I was once asked, what do you do with that ah-silly-oz-co-pee thing?

On October 2, 2017 7:53:30 PM CDT, "Dave Casey polara413@... [TekScopes]" <TekScopes@...> wrote:
I don't know this Sylas fellow, but I sure like his scopes.

DC

On Mon, Oct 2, 2017 at 7:48 PM, david@... [TekScopes] <
TekScopes@...> wrote:



Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools,
gear....
and bumped into something funny and took a screenshot. I burst out
laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03
https://photos.app.goo.gl/
ZymE0eKXzYKVCMx03



david







--
Chris Elmquist

Re: Some Oscilloscope Humor

EricJ
 

I clicked the link and didn't get it at first. I was thinking Sylascope was some obscure brand I'd never heard of!
--Eric
Sent from my Samsung Galaxy S8.

-------- Original message --------From: "david@... [TekScopes]" <TekScopes@...> Date: 10/2/17 7:48 PM (GMT-06:00) To: TekScopes@... Subject: [TekScopes] Some Oscilloscope Humor

 









Hey all,





I spend a fair amount of time trolling CraigsList, etc for tools, gear.... and bumped into something funny and took a screenshot. I burst out laughing... I don't think my wife knows why.





enjoy





https://photos.app.goo.gl/ZymE0eKXzYKVCMx03 https://photos.app.goo.gl/ZymE0eKXzYKVCMx03







david







[Non-text portions of this message have been removed]

Re: Some Oscilloscope Humor

 

It's just yablow screwing up the link.

----- Original Message -----
From: "Richard Pope mechanic_2@... [TekScopes]" <TekScopes@...>
To: <TekScopes@...>
Sent: Monday, October 02, 2017 9:03 PM
Subject: Re: [TekScopes] Some Oscilloscope Humor


David,
The link is broken. Do you have another one?
GOD Bless and Thanks,
rich!

On 10/2/2017 7:48 PM, david@... [TekScopes] wrote:

Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools,
gear.... and bumped into something funny and took a screenshot. I
burst out laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03
https://photos.app.goo.gl/ZymE0eKXzYKVCMx03



david









------------------------------------

------------------------------------


------------------------------------

Yahoo Groups Links


Re: Some Oscilloscope Humor

 

On Mon, 2 Oct 2017 20:03:55 -0500, you wrote:

David,
The link is broken. Do you have another one?
GOD Bless and Thanks,
rich!

Re: Some Oscilloscope Humor

Brad Thompson <brad.thompson@...>
 

On 10/2/2017 9:03 PM, Richard Pope mechanic_2@... [TekScopes] wrote:
David,
The link is broken. Do you have another one?
GOD Bless and Thanks,
rich!
On 10/2/2017 7:48 PM, david@... [TekScopes] wrote:

Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools,
gear.... and bumped into something funny and took a screenshot. I
burst out laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03
https://photos.app.goo.gl/ZymE0eKXzYKVCMx03
Hello--

Well, of course it's a Sylascope... it was manufactured by Sylvania<g>

73--

Brad AA1IP

Re: Some Oscilloscope Humor

David Berlind
 

Sorry.... try this link.

https://photos.app.goo.gl/cZbYSPV7mrjP9f8n1

Google seems to have broken the link after creating the first one.

On Mon, Oct 2, 2017 at 9:03 PM, Richard Pope mechanic_2@...
[TekScopes] <TekScopes@...> wrote:

David,
The link is broken. Do you have another one?
GOD Bless and Thanks,
rich!

On 10/2/2017 7:48 PM, david@... [TekScopes] wrote:

Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools,
gear.... and bumped into something funny and took a screenshot. I
burst out laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03
https://photos.app.goo.gl/ZymE0eKXzYKVCMx03



david











------------------------------------

------------------------------------


------------------------------------

Yahoo Groups Links



Re: Some Oscilloscope Humor

Vince Vielhaber
 

The link shows up twice, one after the other. Just copy the first half and it works fine.

Vince.

On 10/02/2017 09:03 PM, Richard Pope mechanic_2@... [TekScopes] wrote:
David,
The link is broken. Do you have another one?
GOD Bless and Thanks,
rich!

On 10/2/2017 7:48 PM, david@... [TekScopes] wrote:

Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools,
gear.... and bumped into something funny and took a screenshot. I
burst out laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03
https://photos.app.goo.gl/ZymE0eKXzYKVCMx03



david









------------------------------------

------------------------------------


------------------------------------

Yahoo Groups Links


Re: Some Oscilloscope Humor

Richard R. Pope
 

David,
The link is broken. Do you have another one?
GOD Bless and Thanks,
rich!

On 10/2/2017 7:48 PM, david@... [TekScopes] wrote:

Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools,
gear.... and bumped into something funny and took a screenshot. I
burst out laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03
https://photos.app.goo.gl/ZymE0eKXzYKVCMx03



david



[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]

Re: Some Oscilloscope Humor

Dave Casey
 

I don't know this Sylas fellow, but I sure like his scopes.

DC

On Mon, Oct 2, 2017 at 7:48 PM, david@... [TekScopes] <
TekScopes@...> wrote:



Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools, gear....
and bumped into something funny and took a screenshot. I burst out
laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03 https://photos.app.goo.gl/
ZymE0eKXzYKVCMx03



david



[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]

Some Oscilloscope Humor

David Berlind
 

Hey all,


I spend a fair amount of time trolling CraigsList, etc for tools, gear.... and bumped into something funny and took a screenshot. I burst out laughing... I don't think my wife knows why.


enjoy


https://photos.app.goo.gl/ZymE0eKXzYKVCMx03 https://photos.app.goo.gl/ZymE0eKXzYKVCMx03



david

Re: 2454B 400MHz gives just about 300 MHz BW

 

On Mon, 2 Oct 2017 15:33:01 +0100, you wrote:

On 01/10/17 16:37, Chuck Harris cfharris@... [TekScopes] wrote:

I have personally had this happen to all of the well deserved
negative feedback that I have given. I give maybe one every
two years. They never stick, I rarely bother anymore.

You can't believe his customers are that stupid?
Not every customer can be expected to be expert in Tek scopes,
and those that aren't probably won't know about this group.
This comes up all of the time for novices looking for an inexpensive
used oscilloscope. There are plenty of them out there but it takes
experience or specialized knowledge to know what to look for which
makes a new but more expensive instrument a better deal for them. So
perhaps counter intuitively, an expert can spend less and get more
than a novice can.

Even I did not know what to look for in a 2465 series oscilloscope
when I went oscilloscope hunting a couple years ago. But I had enough
general knowledge to know exactly what I was looking for and lucked
out that it did not include a 2465 series.

Re: Tektronix 2465 help required

 

If the entire display is shifting, then that indicates a problem
between and including the CRT and vertical channel switch. The
channel switch could be the problem or anything after that.

Besides checking the power supply voltages, I might short the vertical
signals together at either end of the delay line and then see if the
jumping continues. That could rule out the vertical channel switch as
a cause.

On 01 Oct 2017 02:08:53 +0000, you wrote:

David: Thanks for the response and, yes, cursors jump when the trace jumps. I assume this is a useless fact that help track down the cause.

Once again, thanks,

G Broten

Re: 2454B 400MHz gives just about 300 MHz BW

Tom Gardner
 

On 01/10/17 16:37, Chuck Harris cfharris@... [TekScopes] wrote:

When you get beyond a few thousand successful sales, ebay starts
to give you Mulligans for erasing neutral or negative feedbacks.
and after a year or two, they evaporate naturally anyway.

Basically, as long as you made an offer to correct the problem
(eg offered some money back, or a return), they will erase any
negative or neutral feedback... if you ask.
That's surprising - and nasty from a purchaser's PoV.

I wonder if that implies people should steer clear of large
sellers that have a 100% rating. IMHO there's no way a large
seller can be expected to have a 100% rating: some purchasers
are just jerks.


I have personally had this happen to all of the well deserved
negative feedback that I have given. I give maybe one every
two years. They never stick, I rarely bother anymore.

You can't believe his customers are that stupid?
Not every customer can be expected to be expert in Tek scopes,
and those that aren't probably won't know about this group.

The only reasons I can imagine that would cause someone to buy
from him is extreme lack of experience, impatience, or just plain
wishful thinking.
Yup.

Re: What is this eBay item

 

My guess is that it allows connecting to one of the internal buses via
GPIB for diagnostic purposes which would also allow calibration.

Re: 2454B 400MHz gives just about 300 MHz BW

 

On 30 Sep 2017 23:50:19 +0000, you wrote:

...

CH> Lot's of things could make your scope test slow, but frequently it is just calibration.

Sound like good news

Seller responded: device was calibrated when I got it about 5 years ago.
Cloud 5 years be long long enough to degrade bandwidth by 25%?...
...

Ulli
The only time I've seen the bandwidth degrade that much is if it was
misadjusted or something broke.

What is this eBay item

Szabolcs Szigeti
 

TDS Firmware update: How?

Bruce Lane
 

OK, I'm stumped... I have the updated firmware for my 784D, in the form
of the .bin files (bootloader, firmware and NVRAM) as downloaded from
the KO4BB site.

How in blazes do I program it in? The service manual only makes
reference to a 'firmware update disk' supplied by Tek, which (according
to said manual) you insert in your computer and "Follow the instructions
in the README" file on the disk.

Thanks much.

--
---
Bruce Lane, ARS KC7GR
http://www.bluefeathertech.com
kyrrin (at) bluefeathertech dot com
"Quando Omni Flunkus Moritati" (Red Green)

TDS784 Relay Exerciser script

Bruce Lane
 

Fellow Tekkies,

Thanks to some help from Dave Casey, I've had great success this
weekend with exercising the relays in my TDS784D via a short GPIB
command script and, as a result, clearing up the SPC failure (at least
for now).

I'm going to post the updated script to both my FTP site and the
group's file area. As to what you'll need to pull the same trick...

--A Windows PC with a National Instruments GPIB card (I'm using a
PCI-GPIB ver. 2), and appropriate drivers installed.

--NI's 'Measurement and Automation Explorer' software package. This
should come with the card, if you order it new, or you can download it
from NI's site as part of the default software package for whatever card
you pick up.

The tool to use will be National's Interactive Command window (the file
is called ibic.exe). Once you get that up and running, and the addresses
set for your 'scope and GPIB card, execute the script repeatedly. You
can do this by executing the script manually, the first time, at the
command window's ud1 prompt (the digit may be something else, depending
on what address you have your 'scope set for).

ud1: $ c:&#92;<path-to-file>&#92;filename.txt

Once you've run it, you can run it repeatedly by pressing the up-arrow
on your keyboard and 'Enter,' in rapid sequence. Do this for 30 seconds
to a minute, then sit back and listen to your TDS's attenuator relays go
nuts.

Happy tweaking.

--
---
Bruce Lane, ARS KC7GR
http://www.bluefeathertech.com
kyrrin (at) bluefeathertech dot com
"Quando Omni Flunkus Moritati" (Red Green)