Date   

New link collection

Michael Dunn
 

I just created a list of some scope-related articles on EDN…



https://groups.io/g/TekScopes/table?id=2209


Re: move: Archive, files etc, will they stay or move ?

Artekmedia <manuals@...>
 

Automagic logins are a function of your "saved passwords" settings in your particular operating system/browser and not groups.io

Cheers
-DC
manuals@artekmanuals.com

On 12/19/2017 8:14 AM, Chris Wilson wrote:
Mea culpa, I have a log in but wrongly assumed I would be automagically
logged in each time. Manually logged in and now I see the files and
photos. Thanks for your patience, I'm not safe out these days ;)




Best Regards,
Chris Wilson. 2E0ILY


> Chris

As explained earlier you need a groups.io login if you don't already
have one you will need to create on, instructions were in the earlier
emails. Just because you are getting Tekscopes email does not
necessarily mean that you have a groups.io login ( not unlike yahoo
really in this case)
Next log into groups .io and then come back to any email from tekscope
and at the bottom you will find the following link
Group Home:https://groups.io/g/TekScopes
Click on the link which take you to the Tekscopes home page. There
you will see a set of tabs on the left in those are ones marked
"Photos" anf "Files" respectively click on those and viola you find all the past p[ixs and files
Dave
manuals@artekmanuals.com





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


Re: move: Archive, files etc, will they stay or move ?

Chris Wilson
 

Got it now, it was me assuming I would automatically be logged in,
thanks Craig!




Best Regards,
Chris Wilson. 2E0ILY

I had nothing to do with the move, Chris, so I'm the wrong person to ask. But just browsing around
the Tekscopes.io homepage and tabs everything seems to be there. It is a damned sight more
intuitive, and quicker, that the damnable Yahoo.
Craig


Re: move: Archive, files etc, will they stay or move ?

Chris Wilson
 

Mea culpa, I have a log in but wrongly assumed I would be automagically
logged in each time. Manually logged in and now I see the files and
photos. Thanks for your patience, I'm not safe out these days ;)




Best Regards,
Chris Wilson. 2E0ILY

Chris
As explained earlier you need a groups.io login if you don't already
have one you will need to create on, instructions were in the earlier
emails. Just because you are getting Tekscopes email does not
necessarily mean that you have a groups.io login ( not unlike yahoo
really in this case)
Next log into groups .io and then come back to any email from tekscope
and at the bottom you will find the following link
Group Home:https://groups.io/g/TekScopes
Click on the link which take you to the Tekscopes home page. There
you will see a set of tabs on the left in those are ones marked
"Photos" anf "Files" respectively click on those and viola you find all the past p[ixs and files

Dave
manuals@artekmanuals.com


Re: Searching Photo Albums

Artekmedia <manuals@...>
 

The PHOTO section does seem to be in "Folder NAME" order so until the SEARCH thing is resolved you track down a couple of layers. The 7603 folder is the 10th grouping ( at the bottom of the first page) ...on my browser
-DC
manuals@artekmanuals.com

On 12/19/2017 8:06 AM, Craig Sawyers wrote:
Maybe I'm just being a little dense, but I can't find a way to search for a particular photo album.
So if I was looking for all albums which contained, say, 7603?


Craig



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


Re: move: Archive, files etc, will they stay or move ?

Craig Sawyers <c.sawyers@...>
 

Have all the files and photos been moved to .io though Craig? As in with Yahoo you could
"Visit your
group" and then go to the Files or Photos section? Thanks.




Best Regards,
Chris Wilson. 2E0ILY
I had nothing to do with the move, Chris, so I'm the wrong person to ask. But just browsing around
the Tekscopes.io homepage and tabs everything seems to be there. It is a damned sight more
intuitive, and quicker, that the damnable Yahoo.

Craig


Re: Searching Photo Albums

Artekmedia <manuals@...>
 

Good point...The FILES section has a SEARCH window but PHOTOS does not seem to

-DC
manuals@artekmanuals.com

On 12/19/2017 8:06 AM, Craig Sawyers wrote:
Maybe I'm just being a little dense, but I can't find a way to search for a particular photo album.
So if I was looking for all albums which contained, say, 7603?


Craig



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


Re: move: Archive, files etc, will they stay or move ?

Artekmedia <manuals@...>
 

Chris

As explained earlier you need a groups.io login if you don't already have one you will need to create on, instructions were in the earlier emails. Just because you are getting Tekscopes email does not necessarily mean that you have a groups.io login ( not unlike yahoo really in this case)

Next log into groups .io and then come back to any email from tekscope and at the bottom you will find the following link

Group Home:https://groups.io/g/TekScopes
Click on the link which take you to the Tekscopes home page. There you will see a set of tabs on the left in those are ones marked "Photos" anf "Files" respectively click on those and viola you find all the past p[ixs and files


Dave
manuals@artekmanuals.com

On 12/19/2017 8:01 AM, Chris Wilson wrote:
Have all the files and photos been moved to .io though Craig? As in with
Yahoo you could "Visit your group" and then go to the Files or Photos
section? Thanks.




Best Regards,
Chris Wilson. 2E0ILY


>> Sorry for possibly asking an already answered question, I go the invitation to .io but I did not see
scanning this mail, if the archives, files etc. will also be moved to .io or to another place
statically or stay
at yahoo ?

Wish you all a merry and blessed Christmas

Jan
They are all there Jan. Absolutely everything back to the year dot. Just use the link and the end of
each message to https://groups.io/g/TekScopes and have a poke around.
Craig


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


Re: move: Archive, files etc, will they stay or move ?

Mark Wendt
 

On 12/19/2017 08:01 AM, Chris Wilson wrote:
Have all the files and photos been moved to .io though Craig? As in with
Yahoo you could "Visit your group" and then go to the Files or Photos
section? Thanks.




Best Regards,
Chris Wilson. 2E0ILY

Go to the group home link down below.  On the left hand side of the page are links to both photos and files.

Mark


Searching Photo Albums

Craig Sawyers <c.sawyers@...>
 

Maybe I'm just being a little dense, but I can't find a way to search for a particular photo album.
So if I was looking for all albums which contained, say, 7603?



Craig


Re: move: Archive, files etc, will they stay or move ?

Chris Wilson
 

Have all the files and photos been moved to .io though Craig? As in with
Yahoo you could "Visit your group" and then go to the Files or Photos
section? Thanks.




Best Regards,
Chris Wilson. 2E0ILY

Sorry for possibly asking an already answered question, I go the invitation to .io but I did not see
scanning this mail, if the archives, files etc. will also be moved to .io or to another place
statically or stay
at yahoo ?

Wish you all a merry and blessed Christmas

Jan
They are all there Jan. Absolutely everything back to the year dot. Just use the link and the end of
each message to https://groups.io/g/TekScopes and have a poke around.
Craig


Repairing a 466 oscilloscope

Nikolay Belikov
 

Hello there!

I'm a new member here and first of all I would like to say big thank you to whoever maintains this group and to everyone who fills it with invaluable information.

Recently I managed do get myself a 466 oscilloscope with DM43 in non-working condition. I'm a total noob in electronics engineering and this is my first scope so please be ready for a bunch of stupid questions.
I managed to fix the low voltage power supply by replacing faulty C1761, C1771 (as well as other big cans, as preemptive measures), C1712 and CR1712. Now the device shows something meaningful on the display, although I don't dare to run it for long periods to test it extensively because the fan does not work and I'm afraid of thermal damage, even with open cabinet. So fixing the fan is where I am stuck now.

First, I measured the transistors in U1690 assembly (the board is early revision, with 1973 printed on it), and found that transistors A (pins 1-3) and D (12-14) were dead. I replaced the IC with four 2N2222A transistors and tried to power it on. The fan worked for few minutes and stopped. The same transistors were very hot, although haven't failed. I removed the fan from the frame and tested the current draw with the impeller mounted. When cold, it consumes about 80 mA (which, from what I found in previous discussions, is normal), but the current immediately starts to ramp up to about 180 mA over several minutes, the aforementioned transistors overheat, the motor begins to vibrate and can be easily stopped by hand.

So what I fruitlessly did in order to fix the problem:
- Shuffled the transistors that replace U1690 - no effect. A (pins 1-3) heats up the most, D (12-14) is the second.
- Checked all the resistors and diodes - they seem to be in spec.
- Replaced the Q1698 with a 2N2907A - the new one does not get warm, although the old one did, but this didn't affect the problem.
- Replaced the C1698 with a new tantalum - no effect.
- Desoldered the motor from the board, lubed it at both ends - no noticeable increase in how easily the shaft rotates.
- Soldered the motor back through a set of wires. This allowed me to do the following:
- I left the windings (pins 10-13 on the motor) open and could measure the output of the Hall sensors, rotating the shaft by hand. The peak voltages were nearly the same across all four outputs.
- I swapped the connections of both windings and Hall sensors, so that windings 10 and 12 were driven by transistors A and D, and windings 11 and 13 by B and C, in case that I've missed something on the board - the transistors B and C predictably got hot.

So at this point I have no ideas left (except purchasing a spare motor, which I would like to avoid given how rare they are) and I'd appreciate any feedback or thoughts.

Thanks a lot,
Nik


Re: subscribe!

Mark Wendt
 

On 12/19/2017 03:15 AM, magnustoelle via Groups.Io wrote:
Good Day,

and this transition has worked well for me - thank you, Dennis!

Please let us know how we can donate to cover for the regular costs...

*And the photo album works as it should again - a real, simple album without any animations or superfluous bells and whistles.*
Great!

Cheers,

Magnus
Agreed!  Same here for me.  And the posts are much better without all the garbage Yahoo was dumping in them.  What's not to like?

Dennis, how can we contribute?  Have you been thinking along the lines of having a paypal or similar account set up to allow us to help pay for the yearly maintenance fees for our group?

Thanks,
Mark


Re: move: Archive, files etc, will they stay or move ?

Craig Sawyers <c.sawyers@...>
 

Sorry for possibly asking an already answered question, I go the invitation to .io but I did not see
scanning this mail, if the archives, files etc. will also be moved to .io or to another place
statically or stay
at yahoo ?

Wish you all a merry and blessed Christmas

Jan
They are all there Jan. Absolutely everything back to the year dot. Just use the link and the end of
each message to https://groups.io/g/TekScopes and have a poke around.

Craig


Welcome!

Michael Dunn
 

The dust has settled, and here we are :-)



Functionality is virtually identical to Yahoo. And I think we’ll be pleased with the return to a clean, responsive, and relatively logical web site.



Dennis will no doubt soon send out donation info.



There are a few nice new features:



- You can edit your posts

- There’s an RSS feed

- Posts are supposed to be indexed by Google, and Groups.io’s search is probably better than Yahoo’s, so… I’m hoping it will be easier to find things now.

- There are advanced features, like subgroups, hashtags, chats, and a wiki. We probably won’t be needing them, but…never know.



Note that the Yahoo “Links” section now lives in “Databases”.



Michael


Re: move: Archive, files etc, will they stay or move ?

Chris Wilson
 

If files on the old forum are deleted links will no longer work, care
is needed to ensure the original resources remain available to the .io forum

I think that realistically means keeping the existing ones on Yahoo to
preserve the links in posts.




Best Regards,
Chris Wilson. 2E0ILY

Sorry for possibly asking an already answered question, I go the
invitation to .io but I did not see scanning this mail, if the archives,
files etc. will also be moved to .io or to another place statically or
stay at yahoo ?
Wish you all a merry and blessed Christmas
Jan


move: Archive, files etc, will they stay or move ?

Jan Wuesten
 

Sorry for possibly asking an already answered question, I go the invitation to .io but I did not see scanning this mail, if the archives, files etc. will also be moved to .io or to another place statically or stay at yahoo ?

Wish you all a merry and blessed Christmas

Jan


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Re: Hello all!

David Thomas
 

just to echo Craig's comment, thanks to Mike & Dennis for not only preserving this resource but improving the quality and reliability of the service. A great Xmas present....

--
Best Regards

David Thomas

*Design Engineer
2T Communications*


Hello all!

Craig Sawyers <c.sawyers@...>
 

Just a word of thanks to an awesome project to protect us, and our archives, from the risk of being
ravaged by Yahoo.



So thanks to the original, original list founder Mike Dunn - hats off Mike! And to Dennis Tillman,
long term Tekscopes contributor, and the guy who has worked tirelessly on the move to groups.io.



Thanks fellas!



Craig


Re: subscribe!

magnustoelle
 

Good Day,

and this transition has worked well for me - thank you, Dennis!

Please let us know how we can donate to cover for the regular costs...

*And the photo album works as it should again - a real, simple album without any animations or superfluous bells and whistles.*
Great!

Cheers,

Magnus

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