Date   

Re: Yahoo is up for sale, get ready for a disaster...

Craig Sawyers <c.sawyers@...>
 

Nope, it will be most probably sold in pieces with the unsold part simply flushed down the drain.
Jag-Lovers overcame this problem by hosting the site and discussion forums themselves, on their own
servers with multiple RAID storage. http://www.jag-lovers.org/ . They are not at all reliant on a
hosting service. The machine, hardware updates etc are funded by calls for donations to the list
members. IIRC they are located in the offices of an IT company in Norway run by one of the list
admins. List software is written by another list member somewhere else on the planet.

Craig


Re: Yahoo is up for sale, get ready for a disaster...

stefan_trethan
 

On Tue, Apr 12, 2016 at 8:19 AM, Sergey Kubushyn @KSI
[TekScopes] <TekScopes@...> wrote:
- many other Yahoo groups will have the same problem
Oh, shure, it is a great consolation somebody else also has problems :) It
makes one's own problems magically go away...
No, but it makes it much more likely for solutions to magically appear
if many people have the same problem.
That's why we have vaccines, fire, the wheel, to name just a few
examples. Yes, there actually are other people smarter than us, deal
with it.

- someone somewhere will probably develop a solution
There is no someone. And time is ticking.
Who's to say there isn't someone from a group called "IT professionals
prepping for the demise of yahoo" to come up with a solution? I think
it is a bit far fetched to expect a bunch of old farts with CRT scopes
to save the world. Most guys here can just about manage to stay
subscribed.

At this point I would recommend we set up an agreed meeting place in
case yahoo groups really does go tits up without warning. As before I
would recommend we use an existing forum, at least temporarily, such
as EEVBlog or whatever.

If you want to try and rescue the archives, good luck. It sure is
beyond me and I have considered them lost since Neo and rely on my
Emails instead.

ST


Re: Yahoo is up for sale, get ready for a disaster...

Sergey Kubushyn
 

On Mon, 11 Apr 2016, Paul Amaranth paul@... [TekScopes] wrote:

They did _NOT_ break the scripts! It had been done _DELIBERATELY_ to shovel
you their ads on every sneeze...

Neo broke the scripts that allowed downloading the archive. Has anyone seen
anything that worked since?

The only think I've found so far is this
http://yahoogroupedia.pbworks.com/w/page/93006447/Chrome%20Application%20To%20Download%20Messages

This is a chrome extension that will allow you to download messages (not files).
Yahoo does do rate limiting, so it may have to be done in chunks.

Paul

On Tue, Apr 12, 2016 at 01:07:13AM +0100, Tom Gardner tggzzz@... [TekScopes] wrote:
On 12/04/16 00:17, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...
It is definitely a worry (especially if the UK's Daily Wail newspaper gets
anywhere near it!), but there are saving graces:
- many other Yahoo groups will have the same problem
- someone somewhere will probably develop a solution
- it won't happen instantly
- who would want to buy Yahoo anyway? The only positive value is in its share of
Alibaba, and that will probably be sold separately

So, yes, we will want/need to find an alternative hosting mechanism.

Now, I must work out how to use wget to create my own private copy of the
archive; if not, then I'll have to code up a duplicator myself!
---
******************************************************************
* KSI@home KOI8 Net < > The impossible we do immediately. *
* Las Vegas NV, USA < > Miracles require 24-hour notice. *
******************************************************************


Re: Yahoo is up for sale, get ready for a disaster...

Sergey Kubushyn
 

On Mon, 11 Apr 2016, Peter Gottlieb hpnpilot@... [TekScopes] wrote:

You can _NOT_ download any messages. It is done _DELIBERATELY_ so they could
feed you with stupid ads. You have to go to their site for every sneeze and
it is not even indexed by search engines.

The group owner can make a list of members, not sure if he is interested or not.

It is possible to download all the messages, photos and files although no
programs seem to exist for my WinXP machine so I'll leave that to someone else.
Hopefully they would be in a format which could allow installation to a
different messaging service.

Peter


On 4/11/2016 7:17 PM, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...

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



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

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


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

Yahoo Groups Links


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


Re: Yahoo is up for sale, get ready for a disaster...

Sergey Kubushyn
 

On Tue, 12 Apr 2016, Tom Gardner tggzzz@... [TekScopes] wrote:

On 12/04/16 00:17, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...
It is definitely a worry (especially if the UK's Daily Wail newspaper gets
anywhere near it!), but there are saving graces:
- many other Yahoo groups will have the same problem
Oh, shure, it is a great consolation somebody else also has problems :) It
makes one's own problems magically go away...

- someone somewhere will probably develop a solution
There is no someone. And time is ticking.

- it won't happen instantly
It will. AOL "Virtual Cities" or whatever it's been called totally
dissapeared LITERALLY overnight. No warnings, no ways for content holders to
retrieve their content. Everything got annihilated and it was not just like
a stupid totally useless, sorry for an expression, facebook. It was
something similar to Yahoo Groups with tons of good stuff.

- who would want to buy Yahoo anyway? The only positive value is in its share of
Alibaba, and that will probably be sold separately
Nope, it will be most probably sold in pieces with the unsold part simply
flushed down the drain.

So, yes, we will want/need to find an alternative hosting mechanism.
It is _NOT_ hosting. Hosting is easy.

Now, I must work out how to use wget to create my own private copy of the
archive; if not, then I'll have to code up a duplicator myself!
You can not. The very reason for all those stupid changes Yahoo groups have
been through was to make it impossible to just mirror it. They wanted to
thrust their stupid ads down everybody's throats and they DELIBERATELY made
it into such a stinking pile that one MUST go there to find anything and get
his portion of ads in the process.

It is not even indexed by search engines so 99% of all postings and other
stuff only exist within Yahoo.

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


Re: Tektronix 465 No Trace, No Dot

Elliott Li
 

Well well well.

You folks had some good ideas.

Here is what I found so far:

Unregulated +15 fuse is good.

Vertical deflection voltage (measured differentially) is -31.5 to +32.0 (seems about right). Left it around zero.

Horizontal deflection voltage (measured differentially) is -10 to +83 (seems wrong). I have always felt like the "center" of my horizontal knob was way off, now I know why. I don't think this is the root cause of the no-trace-at-all problem though. I left the knob at approximately "zero" volts, about where I always had the dial it seems. Something to troubleshoot later. Measured separately, the L wire varied (reference to ground) from 58.1 to 48.3. The R wire varied from 11.8 to 94.8, also referenced to ground. Presumably the circuit driving the L side is the one most out of line, I would think.

Then I got brave and hooked up my Simpson 260 from chassis to the "-2450" test point (TP1423 I believe). On the 5kv range it hardly moved. On the 500 volt scale it went about half way up. On the DMM this measured -490V. Now, it's 11 pm and I know better than to keep at it this evening (as much as I want to). Any pointers? I will review the cathode voltage circuits tomorrow and take another peek tomorrow evening.

Thanks very much again,

--E


Does anybody have a 7K series viewing hood?

 

I was sure I had one, but when I went to search for it, nothing. rats..
I could really use one for the 7934 I just got. happy to buy or trade for it.
it's in a very bright spot, which makes viewing hard without cranking up the intensity.

any help appreciated,
walter (walter2 -at- sphere.bc.ca)
sphere research corp.


YES, saturday's stuff day was incredible, we had about 200 people from all over, and got rid of lots of stuff.


Re: Tek 475: square wave leading corners too rounded?

 

On Tue, 12 Apr 2016 00:41:36 +0100, you wrote:

On 11/04/16 22:01, Dave Voorhis voorhis@... [TekScopes] wrote:

The output from both the 475's internal calibrator and the calibrator
output from a cheap new DSO (a Gratten GA1042CAL) reveals slight
rounding -- though a slightly different shape from each calibrator -- on
the leading corners.

Is this a problem with the scope?
The Gratten is a 40MHz 1GS/s scope, I believe. That ought to have a 10%-90%
risetime of ~9ns. If a 60MHz probe is added, the combined risetime should be
~10.5ns.

The Tek 475 is a 200MHz machine, so ought to have a risetime of ~1.75ns, or 6ns
when combined with a 60MHz probe.
It usually does not work like that for oscilloscope probes. At least
with Tektronix, they make it a habit of specifying the bandwidth *at
the probe tip* so a 100 MHz probe used with a 100 MHz oscilloscope
yields 100 MHz. When they refer to a "100 MHz probe", what they
really mean is a probe intended for use with oscilloscopes up to a
bandwidth of 100 MHz. Other manufacturers in general seem to have
followed this rule.

Gratten could be doing something sneaky but that is unlikely when
their oscilloscope is only 40 MHz.

At high bandwidths this can break down although in the past Tektronix
has noted it like with some of the high bandwidth 11k series
amplifiers where the combined probe and amplifier bandwidth was lower
than the specified probe bandwidth.


Re: Yahoo is up for sale, get ready for a disaster...

Paul Amaranth
 

Neo broke the scripts that allowed downloading the archive. Has anyone seen
anything that worked since?

The only think I've found so far is this
http://yahoogroupedia.pbworks.com/w/page/93006447/Chrome%20Application%20To%20Download%20Messages

This is a chrome extension that will allow you to download messages (not files).
Yahoo does do rate limiting, so it may have to be done in chunks.

Paul

On Tue, Apr 12, 2016 at 01:07:13AM +0100, Tom Gardner tggzzz@... [TekScopes] wrote:
On 12/04/16 00:17, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...
It is definitely a worry (especially if the UK's Daily Wail newspaper gets
anywhere near it!), but there are saving graces:
- many other Yahoo groups will have the same problem
- someone somewhere will probably develop a solution
- it won't happen instantly
- who would want to buy Yahoo anyway? The only positive value is in its share of
Alibaba, and that will probably be sold separately

So, yes, we will want/need to find an alternative hosting mechanism.

Now, I must work out how to use wget to create my own private copy of the
archive; if not, then I'll have to code up a duplicator myself!


!DSPAM:570c3b0d258042775164765!
--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows


Re: Yahoo is up for sale, get ready for a disaster...

John Bryan
 

Whats wrong with a forum format like this one http://bbs.homeshopmachinist.net/forum.php



John Bryan

On Apr 11, 2016, at 8:20 PM, Dwayne Verhey tekscopes@... [TekScopes] <TekScopes@...> wrote:

My offer still stands.

On 11/04/2016 7:17 PM, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...

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


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

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


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

Yahoo Groups Links



Re: Tek 492AP: problems with 2072MHz and 829MHz inputs

Ed Breya
 

The URL works even from my old POS computer. I don't know why yahoo makes all those multiple copies - I only pasted it into the message once. BTW that item also says free shipping, which saves some dollars and grief.

Ed


Re: Tek 492AP: problems with 2072MHz and 829MHz inputs

Ed Breya
 

I think this URL should work. If not, the auction number appears to be 141929945400

Good luck

Tekt http://www.ebay.com/itm/Tektronix-492-Spectrum-Analyzer-Power-On-Tested-Free-Standard-Shipping/141929945400?_trksid=p2045573.c100034.m2102&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003150253%26meid%3D3b42f65a824d4539bdbba033ab364b6a%26pid%3D100034%26rk%3D2%26rkt%3D8%26sd%3D390663059515

http://www.ebay.com/itm/Tektronix-492-Spectrum-Analyzer-Power-On-Tested-Free-Standard-Shipping/141929945400?_trksid=p2045573.c100034.m2102&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003150253%26meid%3D3b42f65a824d4539bdbba033ab364b6a%26pid%3D100034%26rk%3D2%26rkt%3D8%26sd%3D390663059515

Tektronix 492 Spectrum Analyzer Power On Tested ... http://www.ebay.com/itm/Tektronix-492-Spectrum-Analyzer-Power-On-Tested-Free-Standard-Shipping/141929945400?_trksid=p2045573.c100034.m2102&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003150253%26meid%3D3b42f65a824d4539bdbba033ab364b6a%26pid%3D100034%26rk%3D2%26rkt%3D8%26sd%3D390663059515 US $799.00 For parts or not working in Business & Industrial, Electrical & Test Equipment, Test Equipment



View on www.ebay.com http://www.ebay.com/itm/Tektronix-492-Spectrum-Analyzer-Power-On-Tested-Free-Standard-Shipping/141929945400?_trksid=p2045573.c100034.m2102&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003150253%26meid%3D3b42f65a824d4539bdbba033ab364b6a%26pid%3D100034%26rk%3D2%26rkt%3D8%26sd%3D390663059515
Preview by Yahoo


ronix 492 Spectrum Analyzer Power On Tested Free Standard Shipping! http://www.ebay.com/itm/Tektronix-492-Spectrum-Analyzer-Power-On-Tested-Free-Standard-Shipping/141929945400?_trksid=p2045573.c100034.m2102&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003150253%26meid%3D3b42f65a824d4539bdbba033ab364b6a%26pid%3D100034%26rk%3D2%26rkt%3D8%26sd%3D390663059515


Re: Yahoo is up for sale, get ready for a disaster...

Peter Gottlieb
 

Won't work on WinXP. It installed but when I try to run it, it reports it's not a valid win32 executable.


Peter

On Apr 11, 2016, at 8:31 PM, Ron Kolarik rkolarik@... [TekScopes] <TekScopes@...> wrote:

Try this for offline archives <http://www.personalgroupware.com/>


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

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


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

Yahoo Groups Links



Re: Yahoo is up for sale, get ready for a disaster...

dualraoul
 

Try this for offline archives <http://www.personalgroupware.com/>


Re: Yahoo is up for sale, get ready for a disaster...

Torch Fireman
 

My offer still stands.

On 11/04/2016 7:17 PM, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...

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


Re: Yahoo is up for sale, get ready for a disaster...

Peter Gottlieb
 

The group owner can make a list of members, not sure if he is interested or not.

It is possible to download all the messages, photos and files although no programs seem to exist for my WinXP machine so I'll leave that to someone else. Hopefully they would be in a format which could allow installation to a different messaging service.

Peter

On 4/11/2016 7:17 PM, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...

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


Re: Yahoo is up for sale, get ready for a disaster...

Tom Gardner
 

On 12/04/16 00:17, Sergey Kubushyn @KSI [TekScopes] wrote:

OK, Yahoo is up for sale. It is very likely it will be sold by pieces to
whoever wants the particular piece. Even if sold as a whole the new owner
will definitely prune the bad pieces that don't make profit.

It is almost 100% nobody would want Yahoo Groups -- it makes absolutely no
sense from business standpoint.

We MIGHT still have time to archive the most valuable info to save it from
being wiped out from the face of Earth but it might also be too late to
preserve the knowledge and information...
It is definitely a worry (especially if the UK's Daily Wail newspaper gets anywhere near it!), but there are saving graces:
- many other Yahoo groups will have the same problem
- someone somewhere will probably develop a solution
- it won't happen instantly
- who would want to buy Yahoo anyway? The only positive value is in its share of Alibaba, and that will probably be sold separately

So, yes, we will want/need to find an alternative hosting mechanism.

Now, I must work out how to use wget to create my own private copy of the archive; if not, then I'll have to code up a duplicator myself!


Re: Tek 492AP: problems with 2072MHz and 829MHz inputs

Tom Gardner
 

On 11/04/16 20:06, edbreya@... [TekScopes] wrote:

Just noticed there's a whole 492 "not working" on ebay for $799 BIN. It does light up but the display is all messed up. From the pictures it appears to say options 1 2 3 on a tag. This may be a good possibility to make one SA out of two, and have plenty of spare parts and extra stuff to fool around with. May be worth a look, and contact seller for more info.
I can't see that on ebay.com or ebay.co.uk, but I can see a listing (121934026947) that ended on 4th April due to a "spelling error".

Do you still have the ebay number or URL?


Re: Tek 475: square wave leading corners too rounded?

Tom Gardner
 

On 11/04/16 22:01, Dave Voorhis voorhis@... [TekScopes] wrote:

The output from both the 475's internal calibrator and the calibrator
output from a cheap new DSO (a Gratten GA1042CAL) reveals slight
rounding -- though a slightly different shape from each calibrator -- on
the leading corners.

Is this a problem with the scope?
The Gratten is a 40MHz 1GS/s scope, I believe. That ought to have a 10%-90% risetime of ~9ns. If a 60MHz probe is added, the combined risetime should be ~10.5ns.

The Tek 475 is a 200MHz machine, so ought to have a risetime of ~1.75ns, or 6ns when combined with a 60MHz probe.

The limitations of the calibrators?
Most calibrators are there to allow "high" impedance *10 probes frequency response to be tweaked sufficiently that a 1-10kHz square wave has a flat top --
as you show in your two 200us/div pictures. If the amplitude is accurate, that is a bonus. They only need to have an edge that is sufficiently sharp on a kHz square wave; anything more is a bonus (e.g. on the 485 it is <1ns)

The crappy no-name 60mhz 1x 10x probes (they came with the Gratten)?
Something else?
No problem at all?

The probes are set to 10x and have been compensated. Adjusting
compensation alters the angle of the top of the waveform, but has no
effect on the rounded corners.
It wouldn't.

This is the output of the internal calibrator at 2 microseconds sweep:
https://goo.gl/photos/AxAVDprr6aYqggGq7
That looks like a slew-rate limited risetime, which classically happens when something in the driver is current limited.

The risetime appears to be >>6ns. Check the 475 calibrator's spec to see what it ought to be, but I would expect the display to accurately show the calibrators' output, especially if it appears the same on both scopes.

This is the output of the Gratten calibrator at 2 microseconds sweep:
https://goo.gl/photos/44YdLqrR7Bf7XKb4A
That looks like a classic RC exponential risetime, >>10ns.

If it looks the same on both scopes, then I would expect that the display accurately shows the calibrators' output.

I don't see similar corner rounding on the Gratten, but its limited
display (and sampling?) resolution might mask the effect at low sweep
rates. The waveforms appear to be nominally equivalent on both 'scopes
at high sweep rates.
I think the scope and probes are probably OK.

To measure the risetime, have a look at a modern CMOS digital output - many (e.g 74LVC1G*) have risetimes significantly less than 1ns.

To see such a risetime you will need to be careful with the interconnection: ideally a 50ohm cable terminated in 50ohm at the scope.

If the output hasn't got enough oomph (the technical term) to drive a 50 ohm load, the next best is a "low impedance Z0 probe" (500p/1000ohms), which actually has a higher impedance than a "high" impedance *10 probe (100 ohms).

If using a *10 probe, the grounding will critically affect the waveform.

See https://entertaininghacks.wordpress.com/library-2/scope-probe-reference-material/ for general information on probes and probing, including easy DIY low impedance Z0 probes.

See https://entertaininghacks.wordpress.com/2015/04/23/scope-probe-accessory-improves-signal-fidelity/ for the effect of grounding, and a DIY method for improving it.


Re: Tektronix 465 No Trace, No Dot

 

The easiest thing to try is to short the V plates together & the H plates together.Don't trust the position indicators to tell you the whole story; they indicate what the amplifiers are doing, not the CRT.

I would be very nervous applying an ext filament transformer to the CRT.That filament is usually at a high negative voltage, IIRC correctly, on most scopes, it is greater than -1KV.
 HankC, Boston WA1HOS

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