Date   
Re: Serial number location for 7603

tinkera123
 

Thanks DC, your latter version manual of the 7L13 proved to be spot-on.

By later today, I should be the proud owner of three of these beasts in varying conditions of ‘health’ with one as a normal scope, one as a spectrum analyzer and one a so-called parts only. I need to work out all the numbers, then see which manual(s)I need.

Cheers,
Ian

Re: Tek 475 no horizontal

 

Warren,
Seems like you've got it in X-Y mode.I don't remember the controls needed to get in/out of this mode; check out the manual.
HankC, Boston, WA1HOS

Re: TM500 / 5000 Extenders

dnmeeks
 

Hello group!
For anyone that is interested in these extenders, either fully built or parts, I ran out of everything from the Amazon orders. I'm sorry that I had to give the Amazon orders priority, but Amazon really takes the "ship within 3 days" seriously so I had to scramble to get those 20 built / tested / shipped.
For anyone that got one late, I'm sorry about that. I really had no idea that I would sell more than a few a month!
I have bought new PC boards and I have all parts on hand for another 20 - except for the 56 pin edge connectors, which are due by the first week in Feb.
If anyone has a source for that connector I could sell you everything else right now (either built up or parts). Otherwise, once I get those and finish up another batch of boards I'll be getting in touch with group members FIRST, then I'll put more up on Amazon after that. Several of you are out of the USA so I want to try to get boards shipped to you (Amazon is not set up for outside USA).
FYI - the new batch of boards I got with YELLOW mask... they look pretty cool but I am a little disappointed that the silkscreen (black) is not as easy to read. I have some of the blue boards left, but after that they will be yellow.
THanks again for the great interest in these. If anyone has any suggestions for changes, let me know. I am making small tweaks now for the next version (if I need more).
Or any other type of boards that people might like, I'm up for that, too.
Dan

[OT] VOM Triplett model 801.

Sebastian Garcia
 

Hi,

I'm looking for manual & schematics for this very nice VOM meter.

Can somebody help me?

Thanks in advance,
Sebastian.

Re: TM500 / 5000 Extenders

magnustoelle
 

Good Day,

The TM500/5000 interface connectors are *incompatible* with the 5000-series o'scopes.
Just don't.

It's not only a matter of mechanical fit - as Tektronix has wisely prevented incorrect insertions by design - the aforementioned notches.
Pins A1 to A13 and B1 to B13 are completely incompatible - the mentioned +200 VDC supply present at pin A1 on the 5000-series o'scopes is just one example of many incompatibilities.

You have been warned...

Cheers,

Magnus

On 24/01/2018 07:18, dnmeeks wrote:

I have no idea but I suspect they aren't compatible. If it helps, I uploaded a drawing showing the pinouts for the TM500/5000. The file is Tek500_5000_Pinouts.png.
There are a couple of signals that use multiple pins. Do you know if the connectors are the same (56 pins)? And there are keys that should prevent plugging a module into a non-compatible socket. On the TM500/5000, they are keyed between pins 6 and 7 (from the bottom).
Dan

Re: Introducing a new Facebook page

John Brown
 
Edited

The FB Old Tek Scopes group should nicely compliment this site.

FB is what you make of it. I have mine limited to FAMILY only and not all of them. Think I have 22 or so 'friends'. When I get the occasional invite or request I simply say I'm sorry but my policy is ... And I don't even get too many invites cause my settings are locked down. Limited in that way it's a wonderful way to share photo and videos and stories of interest to family only. I ignore the news feeds.

Now with groupsio searching messages is a pleasure. But had the group stayed on Yahoo it wasn't that much (any?) better than FB. A BIG future groupsio issue is the photo search or lack thereof. Still better overall than Yahoo.

And, must say, I don't quite understand not using FB 'for political reasons'. But that's probably just as well.

Really liking groupio vs Yahoo!!

Re: TEK 576 Curve Tracer

ChuckA
 

Velik

Would appreciate the pictures. I was able to remove them easily from the back side but reinstalling them maybe a problem with getting the mounting screws back in with the CRT in place.

Chuck

On 1/23/2018 1:12 AM, Velik Kazakov via Groups.Io wrote:
It is very easy to take out the CRT. Maybe you will need 5-10 minutes to do this. If need can send some pictures ( I exchange the filter cap in PS) and do the same. Just take out the CRT and do all easy.
--
See Early TV at:

www.myvintagetv.com

Focus on 475 scope

agaguk_99@...
 
Edited

Hi everyone, i have 2. scope 475. I have recaped both and now full working. But the focus on the second one isn't sharp like the first one. I checked high voltage, 2.72kv for the first and 2.6k for the second. Focus and asting are working but i cant adjust the line more than that. Someone know what could be the problem ?

Thank you :)

Look picture here
https://1drv.ms/f/s!AnKLPDy3pII_gkwm-YPX7azSL7Y2

Re: TM500 / 5000 Extenders

Mark Wendt
 

On 01/24/2018 01:18 AM, dnmeeks wrote:
I have no idea but I suspect they aren't compatible. If it helps, I uploaded a drawing showing the pinouts for the TM500/5000. The file is Tek500_5000_Pinouts.png.
There are a couple of signals that use multiple pins. Do you know if the connectors are the same (56 pins)? And there are keys that should prevent plugging a module into a non-compatible socket. On the TM500/5000, they are keyed between pins 6 and 7 (from the bottom).
Dan
Dan,

Is that image in an album?  There's no way to search for individual images on groups.io yet.  Can we get the album name or the image link?

Thanks,
Mark

Re: Serial number location for 7603

ArtekManuals
 

Ian

Our version is for sale at www.ArtekManuals.com. Full size A3, 600 dpi schematics, text searchable, electronic table of contents for faster navigation, gray scale scanning of the photo pages etc. very modestly priced :-)

I'll Send you a private email with more detail

-DC




I'll send you a private email with more information.

On 1/24/2018 2:40 AM, tinkera123 wrote:
Wow, thank you for the interest in my problem. Dave Casey, Dave @Artek Manuals, Dave Wise, DaveD ..... so many Daves .... 😀

To answer a few of your questions ....

I live in Melbourne, Australia ....

The Sticker on my scope is in the correct position, looks like the Tek sticker in photos above, has the number 106586 written on it .... no “B” ..... no “H”.

Also, I found a Sticker with Guernsey Islands on it, amongst the multitude of coloured stickers ...... didn’t for a minute think that it may have been manufactured there. That one I will now leave intact.

It has the Fan option.

So.... it would seem that I have a Guernsey Island manufactured 7603 number 106586. That’s a great start. Thanks to all.

UK Manual??? I am away from Home at the moment (picking up another 7603), so I will start Googling for a UK manual when I get Home.
Does anyone have one, or suggest a web site??
Dave @ Artek .... is your later version manual for sale or a freebee web site??

Thanks,
Ian



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

Re: Tek 475 no horizontal

Roger Evans
 

It looks like something has caused XY mode to be activated. If you really wanted XY mode it looks like you should depress only the Ch2 button on the vertical mode selector but having both Ch1 and Ch2 depressed probably produces the mixed movement on Ch1.

If you haven't selected XY on the Time/Div switch then check for 5V on pin 18 of U600, this indicates that something else (faulty cam switch segment?) has caused XY mode to be activated. XY mode activates the lockout function on the sweep controller. The 1MHz square wave you see is probably the Ch1-Ch2 chop frequency.

Regards,

Roger

Tektronix auction TODAY JAN 24th- from FB post by Lloyd Ewing

Peter Mulvey
 

Post from Lloyd Ewing in FB copied below as may be of interest to those in Texas:

Does anyone out there live in the Austin Texas area? I just found this group, and I would like to know if there are other local people who collect vintage test equipment. Or could you suggest other groups where I might be able to find local people? (I know about the local ham radio groups.)

There is currently an auction at the University of Texas in Austin which has 14 vintage scopes for sale (sold as a lot). The auction ends today Wednesday Jan 24 at 1 PM, and I can't bid on this item because I do not have the storage space.

I apologize for not posting this info earlier. I hope that I can find other local collectors in case something like this happens again. (My local phone in reverse is 3987638.)

https://swicoauctions.com/browse#/category/586/item/208789
https://swicoauctions.com/browse#/category/586

Re: Serial number location for 7603

tinkera123
 

Wow, thank you for the interest in my problem. Dave Casey, Dave @Artek Manuals, Dave Wise, DaveD ..... so many Daves .... 😀

To answer a few of your questions ....

I live in Melbourne, Australia ....

The Sticker on my scope is in the correct position, looks like the Tek sticker in photos above, has the number 106586 written on it .... no “B” ..... no “H”.

Also, I found a Sticker with Guernsey Islands on it, amongst the multitude of coloured stickers ...... didn’t for a minute think that it may have been manufactured there. That one I will now leave intact.

It has the Fan option.

So.... it would seem that I have a Guernsey Island manufactured 7603 number 106586. That’s a great start. Thanks to all.

UK Manual??? I am away from Home at the moment (picking up another 7603), so I will start Googling for a UK manual when I get Home.
Does anyone have one, or suggest a web site??
Dave @ Artek .... is your later version manual for sale or a freebee web site??

Thanks,
Ian

Re: TM500 / 5000 Extenders

dnmeeks
 

I have no idea but I suspect they aren't compatible. If it helps, I uploaded a drawing showing the pinouts for the TM500/5000. The file is Tek500_5000_Pinouts.png.
There are a couple of signals that use multiple pins. Do you know if the connectors are the same (56 pins)? And there are keys that should prevent plugging a module into a non-compatible socket. On the TM500/5000, they are keyed between pins 6 and 7 (from the bottom).
Dan

Re: TM500 / 5000 Extenders

Fred. Olsen
 

Dan, these look great but will you be making more? I'd be interested in two. If you're so inclined the "complete kit" format would be my first choice, to save me a few bucks and you some flux smoke. Fully built would be my second choice.

Thanks,
Fred

Tek 475 no horizontal

Warren Brewster
 

Hi,

I have a Tek 475, that I recently repaired ( faulty cap in voltage divider for HV circuit).
I tested the scope and checked as per service manual - worked perfectly.
Turned off and unplugged power lead

When putting the cover back on the edge of the cover caught a single wire connecting the DM44 to the timing board - breaking the wire off the timing board.
I reversed to cover removal and then unplugged other end of the wire.

Re tested scope and all functions work perfectly - so powered down and left overnight.
Next day decided to re-solder wire back onto timing board.
- Removed A8 Trigger / Z-axis board and A7 timing board as per service manual.
- Re-soldered wire ( easy to see where as came from) to trigger board
- Refitted A7 and A8 boards ( I also took pics of all cables just in case) - all cables returned to correct positions.
- Powered up - no horizontal trace :-((

If I set input to display CH1 and CH2 - 2 dots appear.
- Vertical adjust on CH2 moves CH2 up/down
- Vertical adjust on CH1 moves CH1 diagonally right/up.
- Horizontal adjust no effect.

Tested with spare scope - getting square wave from J399, TP526 shows 250mv square wave @~1Mhz.
U520 outputs also show square wave
- Waveform at Q566 is small square wave ( approx 8Mv p-p)

Suggestions of where fault may be - or where to test
Horizontal amp and sweep gen - no saw tooth waveform - probably due to trigger fault???


Regards,

Warren

Re: TM500 / 5000 Extenders

Rick
 

Dan,

Do the electronic components on your board make it incompatible to extend the 5000 series mainframe scopes? I see that pads 3 & 4 are ganged together. Does that also make it incompatible?

I've got a 5CT1N curve tracer that I need to work on with my 5440 and would love to use your extender as long as it does melt it. Pin 1A has 200v on the mainframe.

Thanks, Rick

Re: OT: But still techie... what is it? There are

glkinst <glkinst@...>
 

Dave,Interesting device. Thanks for sharing it with the group.George

On Monday, January 22, 2018 10:24 PM, Dave Seiter <d.seiter@...> wrote:


OK, that makes a lot of sense.  I was confused by the fact that there were no thru ports for electrical, and that the container seemed ill-suited for whatever the sensor assembly was detecting. The container does have an o-ring.  
Thanks All for the info; I wasn't getting much searching, maybe because I was using duckduckgo.
-Dave

      From: George Kerber <gk5220@...>
To: TekScopes@groups.io
Sent: Monday, January 22, 2018 9:58 PM
Subject: Re: [TekScopes] OT: But still techie... what is it? There are
 
Google search found that it is a " Focused Mesh Multiplier (MM-1). For
pulse counting or current measurement of electrons, ions, UV or x-ray
photons, and energetic neutral atoms or molecules."  The can is just a
shipping container for protection of the delicate assembly and may be
filled inert gas or vacuum for shipping. Is there an o-ring or gasket on
the can? - george
see http://pubs.acs.org/doi/abs/10.1021/ac60301a735

On Mon, Jan 22, 2018 at 5:35 PM, John Griessen <@jgriessen> wrote:

On 01/22/2018 04:54 PM, Richard Knoppow wrote:

How does one deal with this?
https://groups.io/g/TekScopes/album?id=16071   What is it? Updated 12:09
pm



Re: 475 Sweep question

donald collie
 

I found a dead transistor in the Z Amp, which prompted me to check all the
Z Amp transistors, but the rest are OK. My 453A does this on the fastest
sweep setting, but only half a major division, and my 7834 not at all. The
Z compensation adjustment capacitor has no effect, so I`ll look in the
sweep section for the adjustment.
Thankyou........................................................................................................................................................................................................................Don
C.

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On Wed, Jan 24, 2018 at 2:44 AM, Chuck Harris <cfharris@...> wrote:

That is due to the amount of time the z-axis circuitry
takes to get the beam lit up and going. There is an
adjustment to minimize the effect, but it isn't perfect.

-Chuck Harris

donald collie wrote:
When I look at a 100Mhz signal, instead of starting at the left of the
CRT
graticule, the trace starts at the 2nd major division - 2 divisions to
the
right of the Left Hand Side. Is this normal?
This happens on both A, and B sweeps, at maximum sweep speed only. Your
comment will be appreciated.
Regards.....................................................
............................Don
Collie jnr.


Re: Hopefully the last 485 recap question

Ed Breya
 

Those are Tek-made, hermetically sealed plastic film caps, and should never fail in normal use. Let them be. Ed