Date   
Re: vintageTEK museum releases Replaceable Parts Registry (RPR)

 

On Sun, Dec 16, 2018 at 06:09 PM, walter shawlee wrote:


sadly, the RPR's contain virtually no data on the 154 tubes
There are two sections in the microfiche about CRT's. One is called CRT and the other CRT Index.
CRT lists data and graphs on various CRT's, however not on Tek P/N but rather CRT type number i.e. T plus 4 digits.
I don't know how that number realates to P/N's. It's old info though, the newest entry I found is from 1974.

CRT Index lists CRT P/N for each instrument. Not much data other than type of phosphor and graticule.

/Håkan

475 (Hi serial) Manual Re-scan Available

ArtekManuals
 

Thanks to a list member we have been loaned a pristine copy of the 475 scope Instruction Manual (serial 25,000 & Above) 070-1862-00. Our original scan done 10 years ago was of a badly marked up copy of the manual rendering some of the schematic pages unreadable in many areas. IF you previously bought a copy from us CONTACT US OFF LIST (replies to the list will be ignored) and we will provide you a free copy via download of the new scan, Schematics and board overlays done in full color this time around as well .... gotta love that nice Tektronix "blue" printing :-P

Cheers & Happy Holidays to All
Dave & Linda
manuals@...

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

DM44 on Tek 475

sp856567@...
 

My dig. Multimeter (DM44) on top of my 475 does not work properly. It will show for short time good reading of voltage then it will go bad reading of some tenth of millivolts . While trying to fix it a have found on schema (nr.4) few -5 volt sources (which are quite noisy). I could not find were they are being sourced from. It is not mentioned on schema, and on both Power supplys ( the dm44's and the 475's ). Following traces also led to anywhere but.... Could anybody help solving the "mystery"?

Re: DM44 on Tek 475

ArtekManuals
 

Try looking for Q444 on the left hand side of A3 board, schematic #3 (Vertical Channel Switching)

Dave
manuals@...

On 12/16/2018 9:17 PM, sp856567@... wrote:
My dig. Multimeter (DM44) on top of my 475 does not work properly. It will show for short time good reading of voltage then it will go bad reading of some tenth of millivolts . While trying to fix it a have found on schema (nr.4) few -5 volt sources (which are quite noisy). I could not find were they are being sourced from. It is not mentioned on schema, and on both Power supplys ( the dm44's and the 475's ). Following traces also led to anywhere but.... Could anybody help solving the "mystery"?


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

Oh Boy - 475

 

We seem to be getting attenuator problems in these 4X5 series scopes. I have had my hell with them. So I fixed a 475 that had a bunch of problems, but was working fine and the guy, this guy is a a "metrologist" among other things. He will calibrate it himself and has standards which will be sent in soon to be recertified. We are not fucking around. So we am on the phone after I dropped it off and it was working fine and he was messing with it and heard a "crack" or whatever. Now if you read my group, this is my co-conspirator in test equipment and audio. (this business thing is actually starting to take off a bit)

So there is this noise and now the volts/div spins freely and makes no change, though it seems to work alright at the gain it is at, not sure but I think it is at 500mV/div right now, and it will not change.

Has anyone had these things apart for this and know anything ?

I am a realist and with the frequency at which we have gotten these attenuator problems I can only surmise that replacement assemblies are not going to be easy to get.

Now this is the guy who had open heart surgery, replaced valves n shit, and his house got robbed when he was in the hospital. They stole a bunch of tools and we were going to take it apart when I was there but he didn't have Allen wrenches ! What a trip eh ?

Anyway, what I am looking for here is of anyone has real experience on these attenuators. I have looked and found that for the 475, nothing else will fit. Actually the part form a 465B might fit a 475A, but not this. It is not an "A". For the normal 475 there are more tits on the cam that actuate the low v/div range. The 475A does not have that, the 465b assembly might work if he wants to give up that extreme sensitivity.

But has anyone worked on the mechanics of this ? I am just assuming at the moment that the parts broken are nylon, which is almost impossible to glue. My Mother is a bit of an expert on this and after what she told me I decided to do something else last time I needed to glue nylon. I can pin it, drill and insert a hot paper clip and all kinds of things, but I have never even had that part of these things apart before.

So I am looking for a little advice on how to approach this. Not only does the knob turn freely, and I am sure it is not loose Allen screws, but it seems to move back and forth easily, as if it is broke off any bearing type of things it may have had.

I'm all ears, and I got alot of time into that thing. It had like five problems when it showed up. I fixed them all but now this comes up and now what, a one channel scope ? And that is no good because he wants to give it to someone.

If I can't get a crack at this soon I might take apart the 465B I got, actually for fixing that one. It has to be similar. What's more, I did mess with the channel 1 attenuator but now there is no problem with that. It is channel 2.

Don't get the idea I am bitching or sh\whining about this, shit happens. More shit happens when the equipment is old enough to drink.

I might soon be sorry I sold my lathes and milling machine. Then I will bitch and whine...

Ideas ? Thanks.

Re: 475 (Hi serial) Manual Re-scan Available

John Clark
 

I know he said not to reply on the list but I have to.....A big THANK YOU to Dave!

I bought this service manual from Dave about 3 years ago and it was pretty hard to read due to lots of owner markings. Having bought it from him he kindly send me this new one as offered below. This new copy he has is very high quality, high resolution, and is a Dec 1983 revision of the Oct 1974 First Printing of the B250000 and up service manual. I have a pretty nice hard copy of the First Printing of the manual but it has errors that caused me, and those here who helped me fix my 475 last time, grief and headache. I've not seen this particular version of the manual anywhere on the free sites. The blue Tektronix printing came out perfect.

If you have a B250000 and up 475 and don't have a 1983 Revision manual, you want this scan.

Thanks again, Dave!

John
________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Artekmedia <manuals@...>
Sent: Sunday, December 16, 2018 6:30 PM
To: TekScopes@groups.io; TekScopes2@groups.io
Subject: [TekScopes] 475 (Hi serial) Manual Re-scan Available

Thanks to a list member we have been loaned a pristine copy of the 475
scope Instruction Manual (serial 25,000 & Above) 070-1862-00. Our
original scan done 10 years ago was of a badly marked up copy of the
manual rendering some of the schematic pages unreadable in many areas.
IF you previously bought a copy from us CONTACT US OFF LIST (replies to
the list will be ignored) and we will provide you a free copy via
download of the new scan, Schematics and board overlays done in full
color this time around as well .... gotta love that nice Tektronix
"blue" printing :-P

Cheers & Happy Holidays to All
Dave & Linda
manuals@...

--
Dave
Manuals@...
www.ArtekManuals.com<http://www.ArtekManuals.com>

Re: vintageTEK museum releases Replaceable Parts Registry (RPR)

Dave Brown
 

What we have obtained a release from Tektronix are the microfiche cards that were sent to the field service centers. They consist of instruction and service manuals, additional calibration and service information, modification information, the replaceable parts registry, and the master publication index. The RPR simply shows what products parts were used in so it is only of interest in locating a donor product. I am in the process of scanning the Master Publication Index which show by product what documentation, manuals, data sheets, etc. was released for it with corresponding part number.

What you are asking for are component specifications. Those are still company confidential and never were sent to the field. They were maintained by Component Engineering. Specifications existed for every Tektronix part number.

The Common Parts Catalogs, also for which we obtained a release, were simply a quick summary of parts recommended for design along with parts not recommended for design for reference. Some engineering specifications were duplicated on microfiche aperture cards located in design engineering areas for convenience. I don't know which specifications were duplicated on aperture cards but I suspect only those of interest by design engineering. That is where one would go if you needed more information than was in the Common Parts Catalogs. There were very few sets of aperture cards in the factory.

vintageTEK

Re: Oh Boy - 475

Jack
 

Jeff, when my 425 arrived with a broken attenuator...sounds much the same as yours...I was told the shafts have 'ears...locating/locking flanges' at their inner end and which break..Have yours ripped off?...if so maybe you can just replace the shaft. Pull the shaft out of the other channel...try it....you know all that.

You can't glue the 'nylon'...maybe it can be welded but if its inside the switch...whistle Dixie/...no that doesn't fix it!.

Mine were not broken so something inside the selector broke. It took me three years to find another module, but you blokes have contacts. I still have modules off
some similar model to 465 ...no good to me. I bought it but it was not same pcb work as my 425. Mu first realisation was colour and style of shafts and that the coax with the gold socket fitted more towards the rear of the pcb than mine..

You can change the attenuator switch unit alone...as I have to do....but easier to drop in a whole module complete. Dinos at Qservice might have one.

Jack

'Tek Spec' v 'Selected from' wrt RPR

Tim Phillips
 

From Tim P (UK)
This is probably an old 'chestnut', but I notice a post from Dave Brown
which mentions that component specifications are '...company
confidential...', hence not in the RPRs. Does this refer to the 'Tek Spec'
in the manual parts list ? I grabbed a manual at random - actually the
7B50- and f'rinstance *151-0190-01 is Tek Spec, whereas 151-0190-05 from
Veronia is 2N3904. Was this part of development where the spec was relaxed
until someone said "Oh, we can use 2N3904 here" ?

I assume this is not the same as 'selected from'

regards
Tim

Re: 475 (Hi serial) Manual Re-scan Available

 

I have your scan of the 475A SM dated 2012 - is that still the current one?

Thanks
David Partridge

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Artekmedia
Sent: 16 December 2018 23:31
To: TekScopes@groups.io; TekScopes2@groups.io
Subject: [TekScopes] 475 (Hi serial) Manual Re-scan Available

Thanks to a list member we have been loaned a pristine copy of the 475
scope Instruction Manual (serial 25,000 & Above) 070-1862-00. Our
original scan done 10 years ago was of a badly marked up copy of the
manual rendering some of the schematic pages unreadable in many areas.
IF you previously bought a copy from us CONTACT US OFF LIST (replies to
the list will be ignored) and we will provide you a free copy via
download of the new scan, Schematics and board overlays done in full
color this time around as well .... gotta love that nice Tektronix
"blue" printing :-P

Cheers & Happy Holidays to All
Dave & Linda
manuals@...
--
Dave
Manuals@...
www.ArtekManuals.com

Re: 475 (Hi serial) Manual Re-scan Available

ArtekManuals
 

Yes
475A-SM 40,992KB
No updates on that one at the momnet
Dave
manuals@...

On 12/17/2018 11:33 AM, David C. Partridge wrote:
I have your scan of the 475A SM dated 2012 - is that still the current one?

Thanks
David Partridge

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Artekmedia
Sent: 16 December 2018 23:31
To: TekScopes@groups.io; TekScopes2@groups.io
Subject: [TekScopes] 475 (Hi serial) Manual Re-scan Available

Thanks to a list member we have been loaned a pristine copy of the 475
scope Instruction Manual (serial 25,000 & Above) 070-1862-00. Our
original scan done 10 years ago was of a badly marked up copy of the
manual rendering some of the schematic pages unreadable in many areas.
IF you previously bought a copy from us CONTACT US OFF LIST (replies to
the list will be ignored) and we will provide you a free copy via
download of the new scan, Schematics and board overlays done in full
color this time around as well .... gotta love that nice Tektronix
"blue" printing :-P

Cheers & Happy Holidays to All
Dave & Linda
manuals@...
--
Dave
Manuals@...
www.ArtekManuals.com

Tek instrument (P6046 Diff probe) case foam - 1975 -  1996 +

Daveolla
 

Greetings, just happened to notice that the grey foam in the P6046 
Diff Probe large late model case has in the last couple of years 
started to breakdown. It is at the point where pushing the foam 
causes a dint and bits will pull apart, it will crumble like a soft 
cookie. Some sticks lightly to probe parts but still easily rubs off 
with no corrosive damage yet.

Other instruments cases around this time may also want to be checked.
The older small cases used Styrofoam and the new larger cases began 
1975 -77 era with the grey foam and continued to 1996 and probably 
even later for other instruments..
The P6406 was last listed in the 1996 Tek catalog ($2495) and classed 
as obsolete in the 1997 cat.

Dave

468 still

Brendan
 

Im still troubleshooting my 468. My schematic is blurry and I was wondering if anyone could tell me the proper voltage at the base of Q958 and Q987A on the A15 board. I have 15V on one side of R971 but he other side is wildly fluctuating between 9V and 12V I don't think thats right. Thanks guys.

Re: 468 still

ArtekManuals
 

+13volts

You need to get a better manual copy ...I know just the place
Dave
manuals@...

On 12/17/2018 9:14 PM, lop pol via Groups.Io wrote:
Im still troubleshooting my 468. My schematic is blurry and I was wondering if anyone could tell me the proper voltage at the base of Q958 and Q987A on the A15 board. I have 15V on one side of R971 but he other side is wildly fluctuating between 9V and 12V I don't think thats right. Thanks guys.


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

Re: 468 still

Brendan
 

On Mon, Dec 17, 2018 at 07:21 PM, Artekmedia wrote:


+13volts

You need to get a better manual copy ...I know just the place
Dave
manuals@...

On 12/17/2018 9:14 PM, lop pol via Groups.Io wrote:
Im still troubleshooting my 468. My schematic is blurry and I was wondering
if anyone could tell me the proper voltage at the base of Q958 and Q987A on
the A15 board. I have 15V on one side of R971 but he other side is wildly
fluctuating between 9V and 12V I don't think thats right. Thanks guys.



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


Thank you very much.
"You need to get a better manual copy ...I know just the place"
I get the hint :)

looking for 2465 service manual

Sampler_one
 

Hi All,
This is my 1st post. i picked up two 2465's. One has no power and the other has some switch problems and a fan issue. I have been trying to work with a PDF service manual and it is making me crazy. Does anyone have a Printed service manual for a 2465 for sale at a reasonable price. Yes retired persons price. Looked on Flee bay and really crazy there.
Please PM me .
Merry Christmas Cheers !
Garry

Which probes fit 7A14 module ?

Jan Wuesten
 

Dear List,

could you please help me, which probes fit the 7A14 current amplifier ?

Thank you

Jan


--
Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten (Telefon direkt: 04882-6054551)

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-(0)4882-6054551 Fax : +49-(0)4882-6054552
<https://www.die-wuestens.de> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten; UStID: DE814610403
**************************************************
Wichtige Informationen:
Unsere Datenschutzerklärung: <https://www.die-wuestens.de/DSE2.pdf>
Widerrufsformular als PDF: <https://www.die-wuestens.de/widerruf.pdf>
Kontakt und Bestellabwicklung: <https://www.die-wuestens.de/kontakt.htm>
Unsere vollständigen AGB: <https://www.die-wuestens.de/agb.htm>
**************************************************

Re: Which probes fit 7A14 module ?

Eino Väänänen
 

On Tuesday, December 18, 2018, 12:03:35 PM GMT+2, Jan Wuesten <fjz@...> wrote:

Dear List,

could you please help me, which probes fit the 7A14 current amplifier ?

Thank you

Jan
--
Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten  (Telefon direkt: 04882-6054551)

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-(0)4882-6054551  Fax  : +49-(0)4882-6054552
<https://www.die-wuestens.de> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten; UStID: DE814610403
**************************************************
Wichtige Informationen:
Unsere Datenschutzerklärung: <https://www.die-wuestens.de/DSE2.pdf>
Widerrufsformular als PDF: <https://www.die-wuestens.de/widerruf.pdf>
Kontakt und Bestellabwicklung: <https://www.die-wuestens.de/kontakt.htm>
Unsere vollständigen AGB: <https://www.die-wuestens.de/agb.htm>
**************************************************

Re: Which probes fit 7A14 module ?

Brian
 

Hi Jan 
The probes you need are P6021 and P6022 . I do not know of any others that will work correctly

Brian

On Tuesday, 18 December 2018, 10:03:36 GMT, Jan Wuesten <fjz@...> wrote:

Dear List,

could you please help me, which probes fit the 7A14 current amplifier ?

Thank you

Jan
--
Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten  (Telefon direkt: 04882-6054551)

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-(0)4882-6054551  Fax  : +49-(0)4882-6054552
<https://www.die-wuestens.de> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten; UStID: DE814610403
**************************************************
Wichtige Informationen:
Unsere Datenschutzerklärung: <https://www.die-wuestens.de/DSE2.pdf>
Widerrufsformular als PDF: <https://www.die-wuestens.de/widerruf.pdf>
Kontakt und Bestellabwicklung: <https://www.die-wuestens.de/kontakt.htm>
Unsere vollständigen AGB: <https://www.die-wuestens.de/agb.htm>
**************************************************






| | Virus-free. www.avg.com |

Re: 7T11 horizontal memory

cmjones01
 

On Thu, Dec 13, 2018 at 05:28 AM, cmjones01 wrote:
I've been back in the office today and have done some more experiments. I have
no known-good sampling heads, only one S-1 and two S-2s bought very cheap and
in unknown condition.
This 7T11 is the most maddenly unreliable plugin I've ever had! It seemed to be working well so I thought I'd tidy up my repairs and put it back together. But while doing so, I found I'd left a screw undone which allowed the trigger board to touch the timing board briefly. The scope shut down and restarted, and after that the 7T11 still worked but with an offset on the trace in equivalent-time mode which worsened as the time/div knob was turned clockwise, as if the slow ramp was sitting on a DC level. Random sampling mode stopped working too. While trying to debug that, I found that my extender cable wasn't plugged in properly so +15V was missing which led me a merry dance. Sorting that out left me with no trace at all!

I've found that Q184, which is critically important for the horizontal memory, is short-circuit all ways, hence the lack of trace. Now I'll find a replacement for it and see if I can find the original fault, or if it will have magically disappeared...

Chris