Date   

Re: Tektronix Model 246E Type 453 Oscilloscope

 

<GRIN> Sounds just like the 7834 in my garage which is officially a spares
mule, but unofficially is just waiting an HT transformer to turn up!

Regards,
David Partridge


________________________________

From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf
Of Tom Jobe
Sent: 23 February 2014 13:37
To: TekScopes@yahoogroups.com
Subject: Re: [TekScopes] Tektronix Model 246E Type 453 Oscilloscope




Hi Tom,
< You buy a certain model that you intend to use and then pick up a parts
unit to have the necessary backup parts. Then you dig into the "parts" unit
and find that maybe it can be repaired. So then you search for another
"parts unit" for that repair. It just keeps on going on and on. I believe
Tom Jobe is in that mode with all his 22xx scopes. >

Your description of the process is exactly right!
Not many ever become the parts scope you planned on.
tom jobe...


Re: Tektronix Model 246E Type 453 Oscilloscope

Tom Jobe <tomjobe@...>
 

Hi Tom,
< You buy a certain model that you intend to use and then pick up a parts unit to have the necessary backup parts. Then you dig into the "parts" unit and find that maybe it can be repaired. So then you search for another "parts unit" for that repair. It just keeps on going on and on. I believe Tom Jobe is in that mode with all his 22xx scopes. >
 
Your description of the process is exactly right!
Not many ever become the parts scope you planned on.
tom jobe...
 
 
 
 
 
 

----- Original Message -----
From: Tom Miller
Sent: Sunday, February 23, 2014 12:02 AM
Subject: Re: [TekScopes] Tektronix Model 246E Type 453 Oscilloscope

 

Many times I have fallen into that trap. You buy a certain model that you intend to use and then pick up a parts unit to have the necessary backup parts. Then you dig into the "parts" unit and find that maybe it can be repaired. So then you search for another "parts unit" for that repair. It just keeps on going on and on.
 
I believe Tom Jobe is in that mode with all his 22xx scopes.
 
Me, I am currently stuck on the 1180x series. I have one unit that just needs a color CRT. So I keep an eye out for one that just has that working display for a good price.
 
We really need a twelve step program around here.
 
 
Regards,
Tom
----- Original Message -----
From: David
Sent: Sunday, February 23, 2014 2:47 AM
Subject: Re: [TekScopes] Tektronix Model 246E Type 453 Oscilloscope

All of these oscilloscopes are old so I would plan on maintenance and might buy
two of the same oscilloscope with one working and one not. Then the non-working
one can either be fixed or used for parts if necessary. In some cases it almost
takes an oscilloscope to fix another oscilloscope.

On 22 Feb 2014 13:43:40 -0800, you wrote:


Re: P6109 probe cable

John Midgley
 

Hi

Thanks for the reply; sorry to be dumb, but when you "without much trouble" - how would you replace the BNC connector? Are they easily removable/replaceable?

Thanks
John


Re: Difference between 7T11 and 7T11A

 

The 7T11A was designed to work in the 7854 which required additional blanking and retrace signals which weren't provided by the 7T11.

For all other 7000 series mainframes, the 7T11 will work fine (assuming the tunnel diodes are good).

For more information than you want look at my website page covering the conversion of a 7T11 to a 7T11A.

http://www.perdrix.co.uk/7T11Conversion/index.htm


Regards,
David Partridge



________________________________

From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf Of einovaan@yahoo.com
Sent: 23 February 2014 12:53
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Difference between 7T11 and 7T11A




What is difference between 7T11 and 7T11A? Is 7T11A somehow better than 7T11?


Difference between 7T11 and 7T11A

Eino Väänänen
 

What is difference between 7T11 and 7T11A? Is 7T11A somehow better than 7T11?


Re: Fast Pulse Generators section vandalized

 

I am unable to find the protection feature in the user interface. Are you able to find it, Dave?

Cheers,
D.


On Sun, Feb 23, 2014 at 1:33 PM, cheater00 . <cheater00@...> wrote:
The only way to delete one of those files is to click on the trash bin image. Then, a pop up shows with the whole website behind it darkened out. It asks you:

"Delete File
Are you sure you want to delete the file 'fast pulse generators - AN94-1 etc.7z.001'"

Then, you have to click the big red button that says "DELETE FILE".

I don't see how all that can be done by mistake.

I'll look into the protection feature. Thanks.
Cheers,
D.


On Sun, Feb 23, 2014 at 1:28 PM, Artek Manuals <manuals@...> wrote:


Vandalize may be a strong word since it is highly unlikely ( but not impossible) we have people on the forum who are bent on malicious mischief. After the switch to the NEO format last year, the FILES and PHOTO sections became harder and less intuitive to use, could be that someone "thought" they were downloading when in fact they were unwittingly removing the file. I haven't been in there in  while but I "think" ( I have been wrong before) that if you are the originator that you can " protect" the a photo  or file folder from being edited by anyone other than yourself and the moderator by checking a box during the creation of the folder,

Dave



On 2/23/2014 6:18 AM, cheater00 . wrote:
 

Hi guys,
someone's vandalized the Fast Pulse Generators directory by removing
one of the archive files.

We are missing the file:
fast pulse generators - AN94-1 etc.7z.001

If you have it, please upload it. I created the file but currently
don't remember what was in it. I didn't expect anyone to vandalize our
files section.

Cheers,
D.



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



This email is free from viruses and malware because avast! Antivirus protection is active.







Re: Fast Pulse Generators section vandalized

 

The only way to delete one of those files is to click on the trash bin image. Then, a pop up shows with the whole website behind it darkened out. It asks you:

"Delete File
Are you sure you want to delete the file 'fast pulse generators - AN94-1 etc.7z.001'"

Then, you have to click the big red button that says "DELETE FILE".

I don't see how all that can be done by mistake.

I'll look into the protection feature. Thanks.
Cheers,
D.


On Sun, Feb 23, 2014 at 1:28 PM, Artek Manuals <manuals@...> wrote:


Vandalize may be a strong word since it is highly unlikely ( but not impossible) we have people on the forum who are bent on malicious mischief. After the switch to the NEO format last year, the FILES and PHOTO sections became harder and less intuitive to use, could be that someone "thought" they were downloading when in fact they were unwittingly removing the file. I haven't been in there in  while but I "think" ( I have been wrong before) that if you are the originator that you can " protect" the a photo  or file folder from being edited by anyone other than yourself and the moderator by checking a box during the creation of the folder,

Dave



On 2/23/2014 6:18 AM, cheater00 . wrote:
 

Hi guys,
someone's vandalized the Fast Pulse Generators directory by removing
one of the archive files.

We are missing the file:
fast pulse generators - AN94-1 etc.7z.001

If you have it, please upload it. I created the file but currently
don't remember what was in it. I didn't expect anyone to vandalize our
files section.

Cheers,
D.



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



This email is free from viruses and malware because avast! Antivirus protection is active.






Re: Fast Pulse Generators section vandalized

Dave / NR1DX
 

Vandalize may be a strong word since it is highly unlikely ( but not impossible) we have people on the forum who are bent on malicious mischief. After the switch to the NEO format last year, the FILES and PHOTO sections became harder and less intuitive to use, could be that someone "thought" they were downloading when in fact they were unwittingly removing the file. I haven't been in there in  while but I "think" ( I have been wrong before) that if you are the originator that you can " protect" the a photo  or file folder from being edited by anyone other than yourself and the moderator by checking a box during the creation of the folder,

Dave


On 2/23/2014 6:18 AM, cheater00 . wrote:
 

Hi guys,
someone's vandalized the Fast Pulse Generators directory by removing
one of the archive files.

We are missing the file:
fast pulse generators - AN94-1 etc.7z.001

If you have it, please upload it. I created the file but currently
don't remember what was in it. I didn't expect anyone to vandalize our
files section.

Cheers,
D.



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



This email is free from viruses and malware because avast! Antivirus protection is active.



Re: Fast Pulse Generators section vandalized

Don Black <donald_black@...>
 

Probably some Yahoo!

Don Black.

On 23-Feb-14 11:18 PM, cheater00 . wrote:
 

Hi guys,
someone's vandalized the Fast Pulse Generators directory by removing
one of the archive files.

We are missing the file:
fast pulse generators - AN94-1 etc.7z.001

If you have it, please upload it. I created the file but currently
don't remember what was in it. I didn't expect anyone to vandalize our
files section.

Cheers,
D.





This email is free from viruses and malware because avast! Antivirus protection is active.



Re: Fast Pulse Generators section vandalized

 

On Sun, Feb 23, 2014 at 1:18 PM, cheater00 . <cheater00@gmail.com> wrote:
Hi guys,
someone's vandalized the Fast Pulse Generators directory by removing
one of the archive files.

We are missing the file:
fast pulse generators - AN94-1 etc.7z.001

If you have it, please upload it. I created the file but currently
don't remember what was in it. I didn't expect anyone to vandalize our
files section.

Cheers,
D.


Fast Pulse Generators section vandalized

 

Hi guys,
someone's vandalized the Fast Pulse Generators directory by removing
one of the archive files.

We are missing the file:
fast pulse generators - AN94-1 etc.7z.001

If you have it, please upload it. I created the file but currently
don't remember what was in it. I didn't expect anyone to vandalize our
files section.

Cheers,
D.


2465B Error 05 44 Need suggestion on tracking down cause of problem

Scott Hamilton <radiofreak313@...>
 

Hello, I need some help tracking down the source of my problem with my 2465B (SN B055XXX).  Here is the issues:  No trace, needed to turn up Grid Bias to get display, Test Fail 05 44 (ADD LED On), after A/B TRIG is pressed read-out is present with flashing dots across top and bottom of screen (2 rows top and bottom).  Replaced A5 board from good scope and everything works fine.  Defective A5 - Intensity Control has no effect.  -1.25V and 1.36V are very low.  Jumping J504 to DIAG (Pins 2&3) causes Voltage to return and trace but no control.  I previously replaced all Caps and Dallas Chip.  U2101 - DAC pins 18 & 19 low output signal (should be over 1V, getting about .25), which feed U2501 (CD4051). Also, TP9 low signal compared to good board.   Since DAC output was low I replaced DAC with a DAC312.  Problem still exists.  All PCB traces checkout ok.
Any suggestions would be greatly appreciated.  Thanks in advance.


List of VXI/PXI modules?

 

Hi guys,
I realize this is probably a huge question, but I have been wondering
if anyone knows of a resource that tries to list all VXI or PXI
modules. I have been wondering what sort of capabilities there are for
this modular system.

If such a thing doesn't exist then maybe we should start a wiki.

Cheers,
D.


Re: OT: X-band doppler water leak detection

stefan_trethan
 

For that to work you need some significant flow, causing significant damage.

Besides, the coils are typically laid without crossing over, meaning
both ends will run parallel in a spiral pattern, think differential
pair routing.
So you'd possibly still not be able to pinpoint the spot depending on
spacing etc.

Ed will probably not get around some serious construction work in any case.
I believe he knows this, but would rather play with some electronic
toys first ;-)

ST

On Sun, Feb 23, 2014 at 8:56 AM, <laingt@wcoil.com> wrote:
I haven't read all the thread so I might be just repeating an Idea that
somebody all ready supplied so forgive me if I do. I think the compressed
air and ultrasonic detector is good. My idea would be to block the drain
end of the loop and then send in hot water. Use an infrared camera
(Ideally) or infrared thermometer to look for the spot where the coils are
no longer hot. The leak will act as the return or drain when the normal
return is blocked. Therefore the rest of the coil will be deadheaded and
cold.
Tim Laing
A sensitive infrared camera could probably be rented or contact a company
that does home heat loss audits.



-----------


Re: Tektronix Model 246E Type 453 Oscilloscope

 

Many times I have fallen into that trap. You buy a certain model that you intend to use and then pick up a parts unit to have the necessary backup parts. Then you dig into the "parts" unit and find that maybe it can be repaired. So then you search for another "parts unit" for that repair. It just keeps on going on and on.
 
I believe Tom Jobe is in that mode with all his 22xx scopes.
 
Me, I am currently stuck on the 1180x series. I have one unit that just needs a color CRT. So I keep an eye out for one that just has that working display for a good price.
 
We really need a twelve step program around here.
 
 
Regards,
Tom

----- Original Message -----
From: David
Sent: Sunday, February 23, 2014 2:47 AM
Subject: Re: [TekScopes] Tektronix Model 246E Type 453 Oscilloscope

All of these oscilloscopes are old so I would plan on maintenance and might buy
two of the same oscilloscope with one working and one not. Then the non-working
one can either be fixed or used for parts if necessary. In some cases it almost
takes an oscilloscope to fix another oscilloscope.

On 22 Feb 2014 13:43:40 -0800, you wrote:


Re: OT: X-band doppler water leak detection

Tim Laing
 

I haven't read all the thread so I might be just repeating an Idea that
somebody all ready supplied so forgive me if I do. I think the compressed
air and ultrasonic detector is good. My idea would be to block the drain
end of the loop and then send in hot water. Use an infrared camera
(Ideally) or infrared thermometer to look for the spot where the coils are
no longer hot. The leak will act as the return or drain when the normal
return is blocked. Therefore the rest of the coil will be deadheaded and
cold.
Tim Laing
A sensitive infrared camera could probably be rented or contact a company
that does home heat loss audits.


Re: Tektronix Model 246E Type 453 Oscilloscope

 

My rough ordered list would go something like:

465B (100 MHz Alternate Sweep) - Very Common
454A, 453A (JFETs)
454, 453 (Nuvistors)
475 (200 MHz Alternate Sweep)
465, 465M (100 MHz Mixed Sweep)

The 454A and earlier have no custom ICs but still have tunnel diodes which are
difficult to find replacements for.

For audio work I would also consider the 2225 which has 500uV/div sensitivity.

If you can live with something larger and older, then a 547 with the appropriate
plug-ins would do more than any of the above but shipping would be more
difficult. I only got one because it was local to me so I could pick it up
myself.

For general purpose use I like the 2230 and 2232. The former can often be found
for less than $150.

All of these oscilloscopes are old so I would plan on maintenance and might buy
two of the same oscilloscope with one working and one not. Then the non-working
one can either be fixed or used for parts if necessary. In some cases it almost
takes an oscilloscope to fix another oscilloscope.

On 22 Feb 2014 13:43:40 -0800, you wrote:

Fellow members,
I'm looking to obtain a decent (low cost) scope for home hobby. (to replace a 1960's Heathkit non-triggered, ac coupled, no frills, or any really useable features). I work with later model Tek's at work, along with 16 Chan. Yokogama units. (My GOD, they are nice, and expensive). My main use at home would be in the audio spectrum. I have an opportunity to buy a Tektronix Model 246E Type 453 Oscilloscope, with probes, for $150.00. I understand these are built very well, and more serviceable than a lot of other Tek. scopes. Just wonderer if anybody has experience with this model, or could recommend a better alternative. (I could always buy a used B&K, Tenma, or so on, but the Tek's have a special place in my heart and confidence level.
Thanks, Don


Re: Tektronix Model 246E Type 453 Oscilloscope

K5MYJ <macklinbob@...>
 


If you don't need fast scope the Heathkit scopes that look like Tek scopes are not bad. I have a 4550 (10MHz) and 4235 (35MHz) that are both good scopes and good manuals are available for them.
 
I also have a Tek 475.
 
It depends on how much money you feel like spending.
 
Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"

----- Original Message -----
Sent: Saturday, February 22, 2014 1:43 PM
Subject: [TekScopes] Tektronix Model 246E Type 453 Oscilloscope

 

Fellow members,

I'm looking to obtain a decent (low cost) scope for home hobby. (to replace a 1960's Heathkit non-triggered, ac coupled, no frills, or any really useable features). I work with later model Tek's at work, along with 16 Chan. Yokogama units. (My GOD, they are nice, and expensive). My main use at home would be in the audio spectrum. I have an opportunity to buy a Tektronix Model 246E Type 453 Oscilloscope, with probes, for $150.00. I understand these are built very well, and  more serviceable than a lot of other Tek. scopes. Just wonderer if anybody has experience with this model, or could recommend a better alternative. (I could always buy a used B&K, Tenma, or so on, but the Tek's have a special place in my heart and confidence level.

Thanks, Don


Re: Odd connector in 7T11 left down corner

 

I like using SMB because some of the other Tektronix plug-ins like their
timer/counters use them so I already have adapter cables made up.

On 22 Feb 2014 17:41:26 -0800, you wrote:

I replace these with SMA - much more useful and common, and usually fits the original hole without modification. Save the old parts if you ever intend to restore the plug-ins to stock condition. Ed


Re: Repairing a probe X10, X100 Readout Resistor

snapdiode@...
 

Great question. Not on my P6105. It's actually kind of baffling how the collet/BNC thingy was made in the first place.
What's your probe's model number?

85881 - 85900 of 189996