Date   

Re: Tek 465 horizontal problem at faster sweeps

Ed Breya
 

What vertical mode was the scope in? The 50 kHz could be the chopped blanking frequency, which would normally show up in the Z-axis when both channels are on, in chop mode, versus alternate mode, where they switch after each sweep. The chopping frequency is normally uncorrelated with the input signal frequency, but it can interact to cause strange display effects. It's best to use only one vertical channel when diagnosing sweep and Z-axis problems, to eliminate this complication.

 

Ed


Re: Tek 465 horizontal problem at faster sweeps

Albert Otten
 

Hi Bogdan,


You took a lot of pictures already, but it might help if you also showed some waveforms at TP1486.

It looks as if a current step in Q1466 results in a slow voltage response at its collector. I don't know how to expalin such a fault, unless someone replaced C1471 with a large cap (rediculous thought).


Albert



---In TekScopes@..., <trileru@...> wrote:

Hello.
I got a 465 oscilloscope (not B or M, simple 465) and everything is working fine apart from two issues.
First is that I cannot adjust the horizontal length of the signal, it extends outside of the viewing area. If someone knows how I could adjust this....
Second problem is more serious. Starting at about 5-10us and going faster to 0.05us the trace on the screen shortens and does not end sharply. It kind of fades away to the extremes, and is brighter in the middle. Signals over 1Mhz don't look good at all, but frequency/amplitude are right. So I figured the problem must be somewhere in the Z-axis circuit with the unblanking pulse. I've managed to isolate the problem at Q1466, on it's emitter I have the unblanking pulse that looks real good even at 0.05us, but on the collector that signal is really damaged at 0.05us. At 1ms the shape of the unblaking pulse looks perfect on the collector, just that it also has some 50khz signal on. And that signal messes up the pulse. Now I know that 50khz is the frequency of the HV oscillator. It looks like the signal might be leaking somewhere into the Z circuit.
Did anyone had/seen this problem before? 
Here are some pictures of the problem on 465 CRT and some screenshots from my digital oscilloscope.

http://imageshack.com/a/img819/592/94qf.jpg signal fades out instead of sharp stop
http://imageshack.com/a/img809/659/z0nn.jpg fastest sweep speed on 0.05us but the trace is not evenly lit, I could increase the brightness to see more signal to the left side but my eyes start to hurt shortly from the increased luminosity in the middle of the trace.
http://imageshack.com/a/img542/1473/d53s.jpg here's the schematic of that area. The circled parts is the assembly to adjust exactly this thing but the problem is that the result is minimal. The variable capacitor does something but not remotely enough. I checked all those parts, I replaced Q1466 with a new 2n2369a. I tested all pasives and they check out ok.
http://imageshack.com/a/img571/6756/nmig.jpg here's a side by side of red signal being the emitter of Q1466 with the normal and good unblanking pulse, and yellow trace is the signal on the collector. That parasite signal is about 50khz.
http://imageshack.com/a/img5/6335/ju3s.jpg 10us sweep speed, the signal starts to look really bad and I also have that reflected on the CRT with some portion of the trace starting to fade away.
http://imageshack.com/a/img703/3195/6f2e.jpg 5us, the pulses are barelly seen.
http://imageshack.com/a/img854/5137/o727.jpg HV oscillator circuit description.

On F1419 fuse I get no 50khz signal, only the unrectified 100Hz or so. I've zoomed in at max and there's nothing there so the “leak” may happen on the other side of the transformer.
I also tested all the diodes and resistors, the only ones that I still didn't are the resistors/caps on the -2450V rail like C1421-C1424 and the resistors around. Everything else checks out ok. The trace is in focus and looks clean, but it's not evenly lit up and it just fades away to the sides. On slower sweeps the dimmed part moves somewhere else on the trace depending on the sweep speed. If I move the trace left/right the dimmed part moves with the trace. So definitely the problem is with the 50khz signal leak. Anyone seen this before and has a quick solution?
Thank you.


Tek 465 horizontal problem at faster sweeps

Bogdan <trileru@...>
 

Hello.
I got a 465 oscilloscope (not B or M, simple 465) and everything is working fine apart from two issues.
First is that I cannot adjust the horizontal length of the signal, it extends outside of the viewing area. If someone knows how I could adjust this....
Second problem is more serious. Starting at about 5-10us and going faster to 0.05us the trace on the screen shortens and does not end sharply. It kind of fades away to the extremes, and is brighter in the middle. Signals over 1Mhz don't look good at all, but frequency/amplitude are right. So I figured the problem must be somewhere in the Z-axis circuit with the unblanking pulse. I've managed to isolate the problem at Q1466, on it's emitter I have the unblanking pulse that looks real good even at 0.05us, but on the collector that signal is really damaged at 0.05us. At 1ms the shape of the unblaking pulse looks perfect on the collector, just that it also has some 50khz signal on. And that signal messes up the pulse. Now I know that 50khz is the frequency of the HV oscillator. It looks like the signal might be leaking somewhere into the Z circuit.
Did anyone had/seen this problem before? 
Here are some pictures of the problem on 465 CRT and some screenshots from my digital oscilloscope.

http://imageshack.com/a/img819/592/94qf.jpg signal fades out instead of sharp stop
http://imageshack.com/a/img809/659/z0nn.jpg fastest sweep speed on 0.05us but the trace is not evenly lit, I could increase the brightness to see more signal to the left side but my eyes start to hurt shortly from the increased luminosity in the middle of the trace.
http://imageshack.com/a/img542/1473/d53s.jpg here's the schematic of that area. The circled parts is the assembly to adjust exactly this thing but the problem is that the result is minimal. The variable capacitor does something but not remotely enough. I checked all those parts, I replaced Q1466 with a new 2n2369a. I tested all pasives and they check out ok.
http://imageshack.com/a/img571/6756/nmig.jpg here's a side by side of red signal being the emitter of Q1466 with the normal and good unblanking pulse, and yellow trace is the signal on the collector. That parasite signal is about 50khz.
http://imageshack.com/a/img5/6335/ju3s.jpg 10us sweep speed, the signal starts to look really bad and I also have that reflected on the CRT with some portion of the trace starting to fade away.
http://imageshack.com/a/img703/3195/6f2e.jpg 5us, the pulses are barelly seen.
http://imageshack.com/a/img854/5137/o727.jpg HV oscillator circuit description.

On F1419 fuse I get no 50khz signal, only the unrectified 100Hz or so. I've zoomed in at max and there's nothing there so the “leak” may happen on the other side of the transformer.
I also tested all the diodes and resistors, the only ones that I still didn't are the resistors/caps on the -2450V rail like C1421-C1424 and the resistors around. Everything else checks out ok. The trace is in focus and looks clean, but it's not evenly lit up and it just fades away to the sides. On slower sweeps the dimmed part moves somewhere else on the trace depending on the sweep speed. If I move the trace left/right the dimmed part moves with the trace. So definitely the problem is with the 50khz signal leak. Anyone seen this before and has a quick solution?
Thank you.


Re: Scientific American CD: BE CAREFUL

 

On Fri, Nov 22, 2013 at 3:03 AM, Dennis Tillman <dennis@...> wrote:
The version of Windows shouldn't matter since it is all HTML.
That HTML is served from a file system, which is part of Windows. It
plays an important role in the functioning of the whole system.

Cheers,
D.


Re: Scientific American CD: BE CAREFUL

 

The version of Windows shouldn't matter since it is all HTML.
The CD is Copyrighted (C) 2000.
They made it browser based so it could work on a MAC or a PC.

As I reported in my follow up post (Wed 11/20/2013 9:28 PM, Scientific
American CD: BE CAREFUL; Windows Solution) the developers made a pretty
amateur mistake that caused all the trouble: they were not consistent in the
capitalization of the paths the indices were located in. They also couldn't
spell the plural of index properly - its indices, not indecies.

Dennis Tillman

-----Original Message-----
From: cheater00 ., Sent: Thursday, November 21, 2013 4:10 AM

<snip>
What Windows version does the CD jewel case say it's compatible with?

D.


Re: 575 curve tracer

Albert Otten
 

I see. My CT has a single C318. I don't have more recent MOD122C documentation. At least up to S/N 11200 C318 has not been introduced in the ordinary 575.


Albert



---In TekScopes@..., <nfeakes@...> wrote:

Albert, thank you for the reply but I am not referring to  C706a-e, those are in the collector supply box.  I am asking about C318 added with the 122c mod.  My 575 has three capacitors mounted on the back of SW305 (C318a,b,c?), which individually compensate the 50, 100 and 200v/step sweeps but I haven't found any documentation for this.

Nick


 



---In TekScopes@..., <aodiversen@...> wrote:

You might mean C706 which has been split-up in MOD122C. See the collector supply diagrams at Kurt's Tekwiki, http://w140.com/tekwiki/wiki/575 .  You will also find there the pdf describing the MOD122C.


Albert



---In TekScopes@..., <nfeakes@...> wrote:

I meant to include:  In place of the one variable capacitor behind SW305 I have 3 which appear to compensate the 50v, 100v & 200v/step ranges separately.  These do not appear in the manual I have.  Anyone know of a source of the later manual showing these?
Nick

 



---In tekscopes@..., <nfeakes@...> wrote:

I have just about completed restoration of a 575 mod-122C.  There are two mods at the back of the manual, one replaces R138 with a diode and the other adds a 100M resistor across the anode and cathode of V152B.  Are these mods worth doing?  Are there any other mods (apart from replacing the diodes with silicon which I have already done) which I should consider?
Nick


Re: 575 curve tracer

Nick
 

It is possible, but it looks very Tek, correct wire, the caps are mounted on ceramic strips and so on.  I guess it is possible Tek modified this particular scope specifically for a customer, did they do that sort of thing?

Nick



---In TekScopes@..., <davidwhess@...> wrote:

Replacing C318 with three separate capacitors to individually compensate the 50,
100, and 200 ranges is straightforward. Could it have been a user modification?

On 21 Nov 2013 05:56:15 -0800, you wrote:

>Albert, thank you for the reply but I am not referring to C706a-e, those are in the collector supply box. I am asking about C318 added with the 122c mod. My 575 has three capacitors mounted on the back of SW305 (C318a,b,c?), which individually compensate the 50, 100 and 200v/step sweeps but I haven't found any documentation for this.
>
> Nick
>
>---In TekScopes@..., <aodiversen@...> wrote:
>
> You might mean C706 which has been split-up in MOD122C. See the collector supply diagrams at Kurt's Tekwiki, http://w140.com/tekwiki/wiki/575 . You will also find there the pdf describing the MOD122C.
>
> Albert


White Connector covers for 7k

 

Hi,

I am selling off my covers, see item
291021738218

Jerry Massengale


Re: 575 curve tracer

 

Replacing C318 with three separate capacitors to individually compensate the 50,
100, and 200 ranges is straightforward. Could it have been a user modification?

On 21 Nov 2013 05:56:15 -0800, you wrote:

Albert, thank you for the reply but I am not referring to C706a-e, those are in the collector supply box. I am asking about C318 added with the 122c mod. My 575 has three capacitors mounted on the back of SW305 (C318a,b,c?), which individually compensate the 50, 100 and 200v/step sweeps but I haven't found any documentation for this.

Nick

---In TekScopes@..., <aodiversen@...> wrote:

You might mean C706 which has been split-up in MOD122C. See the collector supply diagrams at Kurt's Tekwiki, http://w140.com/tekwiki/wiki/575 . You will also find there the pdf describing the MOD122C.

Albert


Re: 575 curve tracer

Nick
 

Albert, thank you for the reply but I am not referring to  C706a-e, those are in the collector supply box.  I am asking about C318 added with the 122c mod.  My 575 has three capacitors mounted on the back of SW305 (C318a,b,c?), which individually compensate the 50, 100 and 200v/step sweeps but I haven't found any documentation for this.

Nick


 



---In TekScopes@..., <aodiversen@...> wrote:

You might mean C706 which has been split-up in MOD122C. See the collector supply diagrams at Kurt's Tekwiki, http://w140.com/tekwiki/wiki/575 .  You will also find there the pdf describing the MOD122C.


Albert



---In TekScopes@..., <nfeakes@...> wrote:

I meant to include:  In place of the one variable capacitor behind SW305 I have 3 which appear to compensate the 50v, 100v & 200v/step ranges separately.  These do not appear in the manual I have.  Anyone know of a source of the later manual showing these?
Nick

 



---In tekscopes@..., <nfeakes@...> wrote:

I have just about completed restoration of a 575 mod-122C.  There are two mods at the back of the manual, one replaces R138 with a diode and the other adds a 100M resistor across the anode and cathode of V152B.  Are these mods worth doing?  Are there any other mods (apart from replacing the diodes with silicon which I have already done) which I should consider?
Nick


Re: Scientific American CD: BE CAREFUL

Don Black <donald_black@...>
 

I ran it on Windows XP SP3.

Don Black.

On 21-Nov-13 11:10 PM, cheater00 . wrote:
 

On Thu, Nov 21, 2013 at 4:11 AM, Dennis Tillman wrote:
>
> As a former Microsoft employee (...) the numerous versions of Windows I tried it with

DOS-based windows (95-Me) ignored case in paths. That's why it worked there.

What Windows version does the CD jewel case say it's compatible with?

D.





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Re: Scientific American CD: BE CAREFUL

Don Black <donald_black@...>
 

Hi Dennis,
                    I bought this CD a little while ago but just opened it now (in sealed wrap). I found it couldn't find the file path when I tried to run the Open 1st_windows.exe file but when I right clicked on the home.html file and opened it with Firefox it came straight up and a test search for vacuum found lots of links that seem to run fine. Perhaps more use will throw up some problems but it seems OK so far.
I tried running the supplied search engine but couldn't get it to open, it seemed to flash up some DOS panel for a split second, that's all. However Firefox seems fine.
I just tried opening it in IE8 and while it took a while did open. however I'm having problems with my IE at present and it might normally open quickly. A bit clunky but seems to work. I'll try it later in Linux when I get it set up.
I copied it from CD to Hard drive and it now seems to open OK from 1st+windows.exe .

Don Black.
PS anyone able to try it on a mac?

On 21-Nov-13 2:11 PM, Dennis Tillman wrote:
 

BE CAREFUL before you buy this.

 

I bought an original Scientific American Amateur Scientist CD from Scientific American when it first came out and it has never worked. It still doesn’t work. There is a bug in the program. I do not know what the Surplus Shed is selling but if it is what I have it is useless.

 

As a former Microsoft employee I can definitely confirm the problem is not with something I was doing, the various PCs I tried it or, or the numerous versions of Windows I tried it with. It is browser based so I also tried it with several different brands of browsers.

 

I tried it again tonight. Now Java insists it can’t be trusted and will not open the home page (home.html) or home.exe. I doubt the Amateur Scientist application has anything to do with Java but I get the same error in IE and Chrome. I am able to manually click my way down the directory structure to a specific month in a specific year and run individual html pages but some of the graphics are place holders in the article that comes up and you have to view them separately in your web browser.

 

IIRC it was $49.95 when it came out. I can indeed confirm that Amazon Book Sellers are asking $200 and more for it. Is it worth $20? I would ask the Surplus Shed to confirm their version works (and exactly what environment they used), then decide. If it works then it is probably worth $20. If it doesn’t work then you decide for yourself what the hassle is going to be worth to get to an article in a do-it-yourself fashion.

 

For the record I have had a subscription to SciAm from 1956 to 2011. I stopped subscribing 2 years ago when it became no better than Popular Science. I should have stopped wasting my money 5 years earlier but I kept hoping it would turn around. John Rennie, presided over its disasterous decline and did irreversible harm to a venerable institution. I’m sure he doesn’t deserve all the credit, others must be to blame as well.

 

Dennis Tillman

 

PS: I would appreciate someone passing this along to the HP_Agilent_equipment group after confirming this CD has a major flaw as I described.

 

 

From: Of Daniel Koller, Sent: Wednesday, November 20, 2013 1:37 PM
To: hp_agilent_equipment@...; TekScopes@...
Subject: [TekScopes] Re: [hp_agilent_equipment] Re: Lightning Track Scope

 

  On the other hand, I thought folks here might be interested in the following link to a discounted copy of the Scientific American Amateur Scientist CD, which is available at Surplus Shed.  The CD has its limitations, in format mainly, but it is a complete collection.  I've seen it recently for $200 on Amazon (used, as it is discontinued), but it's really not worth that much in my opinion.  $20 however, is a good deal, and I would like to see Surplus Shed (no affiliation) stay in business.

 

  Dan

 

(I don't know why it doesn't point directly to Surplus Shed, but it does appear to be an on-line link to the current deals there).

 

 

On Tuesday, September 10, 2013 5:33 AM, William <willard561@...> wrote:

 

The display is kind of like the Lear Omniscope Bill Lear developed in the late 50's. It used a CRT to display the bearing to the VOR, if there was no signal it displayed a round circle. When it dot a signal from a VOR the radial/bearing to the VOR was a pip to the outside of the circle, and it's length depended on the signal strength.
Bill Higdon


--- In hp_agilent_equipment@..., David Byrne <kapnkid1977@...> wrote:
>
> For those curious about the subject. I hope the attached file schematic comes through.


>

 








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Re: Scientific American CD: BE CAREFUL

 

On Thu, Nov 21, 2013 at 4:11 AM, Dennis Tillman <dennis@...> wrote:

As a former Microsoft employee (...) the numerous versions of Windows I tried it with
DOS-based windows (95-Me) ignored case in paths. That's why it worked there.

What Windows version does the CD jewel case say it's compatible with?

D.


Re: Manual P6019/P6020

Herbert
 

Hi,

thanks to all who participated and helped !

I received the infomation needed .

Herbert


Am 21-11-2013 10:39, schrieb eggeja2@...:

 

Hi to All,

 

The P6019 and P6020 are the predecessors of the later P6021 and P6022.

 

Their schematics (including their Passive Terminations) are included in the early Type 134 Manual (070-0524-00).

 

With respect to the P6019 and P6020 AC-Current Probes. These can also be used in combination with the 7A14 AC-Current Probe Amplifier. The P6019 Coding Ring (7A14 Manual) page 1-1) is numbered 131-0750-00 and this part is for sale on eBay.

 

Greetings,

 

Egge Siert

ahoogroups.com, wrote:

Hi Herbert, I sent you a private message. Albert.




---In TekScopes@..., wrote:

Hi Albert,

can you share the info ( schematic etc. ) with me ???

Thanks a lot in advance

Herbert

Am 19-11-2013 18:21, schrieb aodiversen@...:
 

Well Herbert.... I know ;=). The P6019 is much simpler, no frequency correction components at all inside. Just the coil(s) at the core. [Schematic Dec 1966.] The passive termination is different also.


Albert



---In TekScopes@..., wrote:

Hello David, hello Dave,

`Thanks a lot so far! The P6021/22 I already have, and they should not be sooooo gar away from the
older P6019/20, but... who knows ?!

Herbert



Am 19.11.2013 17:30, schrieb Artek Manuals:
 

We do have the P6021 Current probe but I have no idea how close it is to the other two

Herbert get back to me and If you dont come up with a free one and I will see if I can locate one here in the states to Scan

Dave
Artekmanuals

On 11/19/2013 11:12 AM, David wrote:
 

I have searched but never seen anything on these. Artek Manuals apparently does
not have the P6019 or P6020 manuals either.

On 19 Nov 2013 08:27:50 -0800, you wrote:

>Hello out there,
>
>does anyone have a manual copy of the TEK P6019 current probe ?
>
>I need it
>
>Rgards
>
>Herbert



-- 
Dave
Manuals@...
www.ArtekManuals.com




Re: Manual P6019/P6020

Egge Siert
 

Hi to All,

 

The P6019 and P6020 are the predecessors of the later P6021 and P6022.

 

Their schematics (including their Passive Terminations) are included in the early Type 134 Manual (070-0524-00).

 

With respect to the P6019 and P6020 AC-Current Probes. These can also be used in combination with the 7A14 AC-Current Probe Amplifier. The P6019 Coding Ring (7A14 Manual) page 1-1) is numbered 131-0750-00 and this part is for sale on eBay.

 

Greetings,

 

Egge Siert

---In TekScopes@..., <measurement@...> wrote:

Hi Albert,

can you share the info ( schematic etc. ) with me ???

Thanks a lot in advance

Herbert

Am 19-11-2013 18:21, schrieb aodiversen@...:
 

Well Herbert.... I know ;=). The P6019 is much simpler, no frequency correction components at all inside. Just the coil(s) at the core. [Schematic Dec 1966.] The passive termination is different also.


Albert



---In TekScopes@..., <measurement@...> wrote:

Hello David, hello Dave,

`Thanks a lot so far! The P6021/22 I already have, and they should not be sooooo gar away from the
older P6019/20, but... who knows ?!

Herbert



Am 19.11.2013 17:30, schrieb Artek Manuals:
 

We do have the P6021 Current probe but I have no idea how close it is to the other two

Herbert get back to me and If you dont come up with a free one and I will see if I can locate one here in the states to Scan

Dave
Artekmanuals

On 11/19/2013 11:12 AM, David wrote:
 

I have searched but never seen anything on these. Artek Manuals apparently does
not have the P6019 or P6020 manuals either.

On 19 Nov 2013 08:27:50 -0800, you wrote:

>Hello out there,
>
>does anyone have a manual copy of the TEK P6019 current probe ?
>
>I need it
>
>Rgards
>
>Herbert



-- 
Dave
Manuals@...
www.ArtekManuals.com



Scientific American CD: BE CAREFUL; Windows Solution

 

David is a genius!

 

One of the reviews on Amazon described what one reviewer did to get his copy to work. The fix was Linux specific but it gave me the clue I needed to make the application work in Windows. I make no guarantees that what I did will work for you unless you follow all these steps and in this order:

 

1)    I created a new directory in my c:\ root directory called SciAm Amateur Scientist CD.

2)    I copied ONLY the files from the AmSci01 directory on the CD into the new directory I created on my hard drive

3)    This next step requires you to use a plain simple TEXT editor (such as Notepad.exe) in the following order:

            3a)       Open Notepad

3b)       In Notepad click File, then Open, then change the folder location to the new directory you created and copied all CD the files over to

3c)       In the FileName field type:    index.htm

3d)       What will appear in Notepad is partly readable HTML gobbledygook.

3e)       BE VERY CAREFUL AT THIS POINT NOT TO MAKE A MISTAKE AND INADVERTENTLY ADD OR DELETE ANYTHING

3f)        Click on Edit, then on Replace

3g)       In the Replace dialog box check the Match Case choice

3h)       In the Find What field type this word:    Indecies       Note the first letter is the capital letter I and this is a misspelling of the word they intended to use

3i)        In the Replace With field type this word:    indecies     Note that the spelling is the same (still misspelled) but the first letter is now lower case

3j)        Click on Replace All

3k)       Save your work using File Save, then quite out of Notepad

4)    To test your work, double click on the saved index.htm file. That will start your favorite browser. I still got a nasty Java error “Failed to validate certificate. The application will not be executed.” But I just pressed OK and the nasty error message went away so it was apparently referring to something else in the index.htm file that was trying to run. Fortunately the Amateur Scientist application appears to work just fine for the very first time.

 

Thank you David for pointing me to the clue I needed.

 

Dennis Tillman

 

 

From: David DiGiacomo,
Sent: Wednesday, November 20, 2013 7:30 PM

On Wed, Nov 20, 2013 at 8:11 PM, Dennis Tillman <dennis@...> wrote:

I bought an original Scientific American Amateur Scientist CD from Scientific American when it first came out and it has never worked. It still doesn’t work. There is a bug in the program. I do not know what the Surplus Shed is selling but if it is what I have it is useless.

 

It appears that worst-case, you would have to edit the top level index.htm file.  Dennis, could you give this a try?





Re: Scientific American CD: BE CAREFUL

David DiGiacomo
 


On Wed, Nov 20, 2013 at 8:11 PM, Dennis Tillman <dennis@...> wrote:
I bought an original Scientific American Amateur Scientist CD from Scientific American when it first came out and it has never worked. It still doesn’t work. There is a bug in the program. I do not know what the Surplus Shed is selling but if it is what I have it is useless.


It appears that worst-case, you would have to edit the top level index.htm file.  Dennis, could you give this a try?


Re: TM500 side covers For Sale

 

Hi Dave,

Sorry these are plugin covers


Jerry Massengale



-----Original Message-----
From: Dave Daniel
To: TekScopes
Sent: Wed, Nov 20, 2013 6:58 pm
Subject: Re: [TekScopes] TM500 side covers For Sale

 
Jerry,

Are these blue or tan? And will they fit on a TM5006? I need a pair of blue side covers for a TM5006.

Cheers,
DaveD

On 11/20/2013 9:30 AM, jerry massengale wrote:
 
Hi,

I have side covers for TM500 plugins. Solid and perforated, some with insulator. $5 each plus shipping.

Jerry Massengale



Scientific American CD: BE CAREFUL

 

BE CAREFUL before you buy this.

 

I bought an original Scientific American Amateur Scientist CD from Scientific American when it first came out and it has never worked. It still doesn’t work. There is a bug in the program. I do not know what the Surplus Shed is selling but if it is what I have it is useless.

 

As a former Microsoft employee I can definitely confirm the problem is not with something I was doing, the various PCs I tried it or, or the numerous versions of Windows I tried it with. It is browser based so I also tried it with several different brands of browsers.

 

I tried it again tonight. Now Java insists it can’t be trusted and will not open the home page (home.html) or home.exe. I doubt the Amateur Scientist application has anything to do with Java but I get the same error in IE and Chrome. I am able to manually click my way down the directory structure to a specific month in a specific year and run individual html pages but some of the graphics are place holders in the article that comes up and you have to view them separately in your web browser.

 

IIRC it was $49.95 when it came out. I can indeed confirm that Amazon Book Sellers are asking $200 and more for it. Is it worth $20? I would ask the Surplus Shed to confirm their version works (and exactly what environment they used), then decide. If it works then it is probably worth $20. If it doesn’t work then you decide for yourself what the hassle is going to be worth to get to an article in a do-it-yourself fashion.

 

For the record I have had a subscription to SciAm from 1956 to 2011. I stopped subscribing 2 years ago when it became no better than Popular Science. I should have stopped wasting my money 5 years earlier but I kept hoping it would turn around. John Rennie, presided over its disasterous decline and did irreversible harm to a venerable institution. I’m sure he doesn’t deserve all the credit, others must be to blame as well.

 

Dennis Tillman

 

PS: I would appreciate someone passing this along to the HP_Agilent_equipment group after confirming this CD has a major flaw as I described.

 

 

From: Of Daniel Koller, Sent: Wednesday, November 20, 2013 1:37 PM
To: hp_agilent_equipment@...; TekScopes@...
Subject: [TekScopes] Re: [hp_agilent_equipment] Re: Lightning Track Scope

 

  On the other hand, I thought folks here might be interested in the following link to a discounted copy of the Scientific American Amateur Scientist CD, which is available at Surplus Shed.  The CD has its limitations, in format mainly, but it is a complete collection.  I've seen it recently for $200 on Amazon (used, as it is discontinued), but it's really not worth that much in my opinion.  $20 however, is a good deal, and I would like to see Surplus Shed (no affiliation) stay in business.

 

  Dan

 

(I don't know why it doesn't point directly to Surplus Shed, but it does appear to be an on-line link to the current deals there).

 

 

On Tuesday, September 10, 2013 5:33 AM, William <willard561@...> wrote:

 

The display is kind of like the Lear Omniscope Bill Lear developed in the late 50's. It used a CRT to display the bearing to the VOR, if there was no signal it displayed a round circle. When it dot a signal from a VOR the radial/bearing to the VOR was a pip to the outside of the circle, and it's length depended on the signal strength.
Bill Higdon


--- In hp_agilent_equipment@..., David Byrne <kapnkid1977@...> wrote:
>
> For those curious about the subject. I hope the attached file schematic comes through.


>

 





Re: [hp_agilent_equipment] Re: Lightning Track Scope

Bill Higdon
 

Dan,

Thanks for the link, I lost my copy about 10 years ago & have been looking for a new copy of & on since then

Bill



---In tekscopes@..., <kaboomdk@...> wrote:

Howdy Folks,

  Harking back to our discussion of unusual CRT instruments, a lot of people expressed interest in scanned copies of the May 1963 Amateur Scientist article, which discussed a homemade lightning location finder displaying blips on a CRT.    I actually have scanned copies of most of the issues through 1973 (and counting...) if you would like me to look something up for you, but I can't really sell them.

  On the other hand, I thought folks here might be interested in the following link to a discounted copy of the Scientific American Amateur Scientist CD, which is available at Surplus Shed.  The CD has its limitations, in format mainly, but it is a complete collection.  I've seen it recently for $200 on Amazon (used, as it is discontinued), but it's really not worth that much in my opinion.  $20 however, is a good deal, and I would like to see Surplus Shed (no affiliation) stay in business.

  Dan

(I don't know why it doesn't point directly to Surplus Shed, but it does appear to be an on-line link to the current deals there).



On Tuesday, September 10, 2013 5:33 AM, William <willard561@...> wrote:
 
The display is kind of like the Lear Omniscope Bill Lear developed in the late 50's. It used a CRT to display the bearing to the VOR, if there was no signal it displayed a round circle. When it dot a signal from a VOR the radial/bearing to the VOR was a pip to the outside of the circle, and it's length depended on the signal strength.
Bill Higdon

--- In hp_agilent_equipment@..., David Byrne <kapnkid1977@...> wrote:
>
> For those curious about the subject. I hope the attached file schematic comes through.

>



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