Date   
Re: Need help with 465B

edward@...
 

On Thu, Jun 14, 2018 at 06:03 am, zenith5106 wrote:


Håkan
Hi Håkan,

Thanks for the response and link - much appreciated. You are absolutely correct but.before replacing the IC I removed and cleaned the IC Socket (with switch cleaner). The original IC was then re-inserted with the same results. The fault only cleared after replacing the IC I obtained from a cannibalised Tek 465B. Note that I have also cleaned and re-inserted most of the transistors and IC's (sockets - took a long time!) due to possible poor contact, plus cleaned all the switches.

Edward Thomas

Re: What removes sticker residue without hurting the blue paint?

Kevin Oconnor
 

This topic brought back memories from an unrelated area of my past. Years ago I was an avid home brewer and wine maker, and needed to recycle bottles with labels. I used a product called Straight-A Label Remover. 2tbsp/gal hot water and soak overnight. Even the most stubborn label would have sluffed off of its own weight by morning! Never was sure what was in it, but but it had that slick feel. Maybe highly ionic or something.

Kjo

Re: Need help with 465B

 

On Thu, Jun 14, 2018 at 01:53 am, <edward@...> wrote:


Hi Dieter,

Thanks to Fabio's detailed and clever reasoning (you're very gifted Fabio), I
have found the issue with the Alt mode. The problem turned out to be a
defective U4391 (74LS02) that can be found on diagram 8 (Horizontal Display
Logic A&B Sweep Generator). When measuring pin 3 on this IC there was no
change in state (stayed low) when operating the ALT button in the "Horiz
display" section on the front control panel (after checking the switch first).
Replacing this IC from a butchered 465B restored the Alt mode and the scope
now reliably displays two traces :)

Note that your problem might be caused by a different component failure or
break in the Vert Alt Sync path, but if you follow Fabio's excellent
diagnostics, you will find the problem. Good luck, and another big THANKS to
Fabio, I owe you a drink!

Regards,

Edward Thomas.
Off course you could be right that the IC really was bad. Did you put the original back to confirm ?
Another likely culprit would be bad IC sockets which are known to cause various intermittent problems.
465B from that time are known to have them and if not replaced more problems will probably occur in the future.
To identify the sockets check here: http://w140.com/tekwiki/wiki/Bad_TI_IC_sockets
Note that some of the text and the large picture is incorrect. The smaller pics are right.
/Håkan

Re: Up to date capacitor list for Tek 2465A and 2465B scopes (2018)

 

I only have a short minute but want to post this.  I will comment more on your other posts later when I have more time.
All Tektronix documentation has the physical locations of C1115 and C1132 interchanged.  You may want to update your documentation of PCB layout to show these two capacitors interchanged.  The power supply will not work if you install new capacitors based on the Tektronix documentation for these two parts.  You can verify the proper positions with your ohm meter.  C1115 positive terminal must connect to L1115.

On ‎Thursday‎, ‎June‎ ‎14‎, ‎2018‎ ‎01‎:‎50‎:‎04‎ ‎AM‎ ‎CDT, Timothy via Groups.Io <mustang_gt_y2k=yahoo.com@groups.io> wrote:

[Edited Message Follows]

C1132    10 µF    160    ELCTLT        10 µF    160    Nichicon PW
I pulled out a 250uf 20v from this location

C1115    250 µF    20    ELCTLT        330 µF    50    Panasonic EB
I pulled out a 10uf 160v from this location

I seem to remember reading this is also an error in the documentation.
Also can I use a 20v 330uf cap for C1132 or is the 50V better? I'm just remembering what Menahem said about larger caps...

Sorry for multiple posts for all of you on the mailing list. Groups.io really should filter out edits...

Re: Need help with 465B

edward@...
 

Hi Dieter,

Thanks to Fabio's detailed and clever reasoning (you're very gifted Fabio), I have found the issue with the Alt mode. The problem turned out to be a defective U4391 (74LS02) that can be found on diagram 8 (Horizontal Display Logic A&B Sweep Generator). When measuring pin 3 on this IC there was no change in state (stayed low) when operating the ALT button in the "Horiz display" section on the front control panel (after checking the switch first). Replacing this IC from a butchered 465B restored the Alt mode and the scope now reliably displays two traces :)

Note that your problem might be caused by a different component failure or break in the Vert Alt Sync path, but if you follow Fabio's excellent diagnostics, you will find the problem. Good luck, and another big THANKS to Fabio, I owe you a drink!

Regards,

Edward Thomas.

Re: Up to date capacitor list for Tek 2465A and 2465B scopes (2018)

Timothy
 
Edited

C1132 10 µF 160 ELCTLT 10 µF 160 Nichicon PW
I pulled out a 250uf 20v from this location

C1115 250 µF 20 ELCTLT 330 µF 50 Panasonic EB
I pulled out a 10uf 160v from this location

I seem to remember reading this is also an error in the documentation.
Also can I use a 20v 330uf cap for C1132 or is the 50V better? I'm just remembering what Menahem said about larger caps...

Sorry for multiple posts for all of you on the mailing list. Groups.io really should filter out edits...

Re: Up to date capacitor list for Tek 2465A and 2465B scopes (2018)

Timothy
 

For C1120 10 µF 100 ELCTLT --> 10 µF 160 ,
Can I use https://www.digikey.com/products/en?keywords=493-11505-1-ND or is there some benefit to using a 160V cap?

Re: Up to date capacitor list for Tek 2465A and 2465B scopes (2018)

Timothy
 

Its mostly correct, but I found an error, maybe two.

C1065 .056 µF 250 MTLZD .056 µF 300 Vishay Polyester Film 399-7635-ND
The lead spacing is to wide for the replacement part. Should be 7.62mm but the part is 14.50mm. I could not find a part that fits from Kemet or Vishay @ Digi-key.

C1050 0.22 µF 400 PLSTC 0.22 400 Kemet Polyester 495-4473-ND
The lead spacing is not far enough, are you adding tinned copper wire to lengthen the lead or is this a mistake?

C1130 10 µF 100 ELCTLT 10 µF 160 Nichicon PW 493-11888-3-ND
Link bring up minimum quantity of 500, I think you can use this link instead https://www.digikey.com/products/en?keywords=493-1994-ND ?
FYI I ordered these and they sent the wrong part. I will find out sometime tomorrow if they have corrected the issue and post an update.

New file uploaded to TekScopes@groups.io

TekScopes@groups.io Notification <TekScopes+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the TekScopes@groups.io group.

File: Hameg.zip

Uploaded By: r221b@...

Description:
Hameg 5005 Service and Operating manuals

You can access this file at the URL:
https://groups.io/g/TekScopes/files/Hameg.zip

Cheers,
The Groups.io Team

Re: OT: AT5005 spectrum analyzer display

 

Upload it to the files section?

Regards

----- Original Message -----
From: <r221b@...>
To: <TekScopes@groups.io>
Sent: Wednesday, June 13, 2018 11:39 PM
Subject: Re: [TekScopes] OT: AT5005 spectrum analyzer display


Hello Ed, I used to have a Hameg 5005 which should be the same as your AT 5005. I have the service and operating manuals including schematics and alignment instructions. I'll be happy to send them to you if you send me your email address.

Rich F. r221b@...

Re: OT: AT5005 spectrum analyzer display

r221b@juno.com
 

Hello Ed, I used to have a Hameg 5005 which should be the same as your AT 5005. I have the service and operating manuals including schematics and alignment instructions. I'll be happy to send them to you if you send me your email address.

Rich F. r221b@...

Re: NEW to the group

Raymond Cote
 

I knew some on the Marshall, but drawing a blank where or when.

On Jun 13, 2018, at 19:36, Raymond Cote <@Bluegrass> wrote:

Just might have. I was 627 and 654 blue. Remember Franco and occasionally caught some marine or sailors drunk on the beach. A shot in the head was the punishment. I was in Scotland when there was a fire in the brig of the tender (forget which one, maybe the Canopus)and we lost a few sailors). We had to fire up the reactor and haul ass away from the danger just in case. Fastest I ever saw the nucs move. Maybe 67?

While in Rota, one if our bombers accidentally dropped a “big”!weapon and it made world news. Don’t know dates. Of course google has no info in either event but it was talked about everywhere.

Interesting times.

On Jun 13, 2018, at 18:18, Joel R Kist <joel-kist@...> wrote:

Interesting: Our paths may have crossed ... Home was the GCM Blue so we went the same places. I was in Roto when Franco died my last deployment.

Thanks for the welcome brother -- Joel

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Raymond Cote
Sent: Wednesday, June 13, 2018 6:35 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] NEW to the group



On Jun 13, 2018, at 13:02, Joel R Kist <joel-kist@...> wrote:

About (Hiroshima)-- I would not say everyone at least in the USA; most do not know who are presidents past of the USA !!

Hi, my name is Joel and I have been reading the group messages for some time now and enjoy them. I was a sonar technician (Submarines)in the US Navy sometime ago, very early (1970's). Now retired I am drawn back to playing with the "TRONS". It is easy to see there is a abundance of knowledge here. I look forward to being guided by the group on some projects.

Joel

Hi Joel. Welcome to the group from another bubble head. I was a SINS technician, navy center late 60’s early 70’s. Operated Rota Spain and Holy Lock Scotland. Interesting work, interesting times.
Ray
KD9CCZ




---
This email has been checked for viruses by AVG.
https://www.avg.com



Re: NEW to the group

Raymond Cote
 

Just might have. I was 627 and 654 blue. Remember Franco and occasionally caught some marine or sailors drunk on the beach. A shot in the head was the punishment. I was in Scotland when there was a fire in the brig of the tender (forget which one, maybe the Canopus)and we lost a few sailors). We had to fire up the reactor and haul ass away from the danger just in case. Fastest I ever saw the nucs move. Maybe 67?

While in Rota, one if our bombers accidentally dropped a “big”!weapon and it made world news. Don’t know dates. Of course google has no info in either event but it was talked about everywhere.

Interesting times.

On Jun 13, 2018, at 18:18, Joel R Kist <joel-kist@...> wrote:

Interesting: Our paths may have crossed ... Home was the GCM Blue so we went the same places. I was in Roto when Franco died my last deployment.

Thanks for the welcome brother -- Joel

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Raymond Cote
Sent: Wednesday, June 13, 2018 6:35 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] NEW to the group



On Jun 13, 2018, at 13:02, Joel R Kist <joel-kist@...> wrote:

About (Hiroshima)-- I would not say everyone at least in the USA; most do not know who are presidents past of the USA !!

Hi, my name is Joel and I have been reading the group messages for some time now and enjoy them. I was a sonar technician (Submarines)in the US Navy sometime ago, very early (1970's). Now retired I am drawn back to playing with the "TRONS". It is easy to see there is a abundance of knowledge here. I look forward to being guided by the group on some projects.

Joel

Hi Joel. Welcome to the group from another bubble head. I was a SINS technician, navy center late 60’s early 70’s. Operated Rota Spain and Holy Lock Scotland. Interesting work, interesting times.
Ray
KD9CCZ




---
This email has been checked for viruses by AVG.
https://www.avg.com



Re: NEW to the group

Joel R Kist
 

Interesting: Our paths may have crossed ... Home was the GCM Blue so we went the same places. I was in Roto when Franco died my last deployment.

Thanks for the welcome brother -- Joel

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Raymond Cote
Sent: Wednesday, June 13, 2018 6:35 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] NEW to the group



On Jun 13, 2018, at 13:02, Joel R Kist <joel-kist@...> wrote:

About (Hiroshima)-- I would not say everyone at least in the USA; most do not know who are presidents past of the USA !!

Hi, my name is Joel and I have been reading the group messages for some time now and enjoy them. I was a sonar technician (Submarines)in the US Navy sometime ago, very early (1970's). Now retired I am drawn back to playing with the "TRONS". It is easy to see there is a abundance of knowledge here. I look forward to being guided by the group on some projects.

Joel

Hi Joel. Welcome to the group from another bubble head. I was a SINS technician, navy center late 60’s early 70’s. Operated Rota Spain and Holy Lock Scotland. Interesting work, interesting times.
Ray
KD9CCZ




---
This email has been checked for viruses by AVG.
https://www.avg.com

Re: NEW to the group

Raymond Cote
 

On Jun 13, 2018, at 13:02, Joel R Kist <joel-kist@...> wrote:

About (Hiroshima)-- I would not say everyone at least in the USA; most do not know who are presidents past of the USA !!

Hi, my name is Joel and I have been reading the group messages for some time now and enjoy them. I was a sonar technician (Submarines)in the US Navy sometime ago, very early (1970's). Now retired I am drawn back to playing with the "TRONS". It is easy to see there is a abundance of knowledge here. I look forward to being guided by the group on some projects.

Joel

Hi Joel. Welcome to the group from another bubble head. I was a SINS technician, navy center late 60’s early 70’s. Operated Rota Spain and Holy Lock Scotland. Interesting work, interesting times.
Ray
KD9CCZ

Re: Upgraded, stub tuned, Tektronix SG-504 leveling head back online for a last run

mosaicmerc
 

Ok, 5 of the 10 are spoken for so far.

thx

Ancel

Re: Upgraded, stub tuned, Tektronix SG-504 leveling head back online for a last run

John Griessen
 

On 06/13/2018 05:16 PM, John Griessen wrote:
Hiroshima Diary by John Hersey M.D.
Should be:
Hiroshima Diary by Michiko Hachiya M. D.

Re: Upgraded, stub tuned, Tektronix SG-504 leveling head back online for a last run

John Griessen
 

On 06/13/2018 09:16 AM, Ancel wrote:
BTW, one went to Hiroshima. First time shipping there....I guess everyone knows where that is.
Yes, Hiroshima Diary by John Hersey M.D.

Re: What removes sticker residue without hurting the blue paint?

Richard Knoppow
 

FWIW, the contents of brand name solvents like Ronsonol are in their MSDS available via the web. The MSDS also usually list the CAS numbers of the constituents.
There are some tutorials on solvents on the web. They are classified in various ways such as polar (will mix with water) and non-polar (will not mix with water). These are helpful in finding out what they will dissolve.
I use naphtha on camera shutters, its a good degreaser. Ronsonol seems to be quite pure and does not leave a residue but is more expensive than naphtha from the paint store.
I had not known that Bestine thinner was hexane. That's useful to know because hexane is a good solvent for a number of things. I have not bought Bestine for some time but think the last I got was in an art supply store.
I think I will take your word for the cool flame part.

On 6/13/2018 2:33 PM, Chuck Harris wrote:
Naptha is a very non aggressive burning solvent.
It is what fire eaters squirt in their mouths to
"breath fire". You can dip your hand in it, and
light it off, and all that happens is a cool flame.
I can't lay the same claim for coleman fuel, or white
gas, which are hexane and septane. VM&P Naptha and
Ronsin lighter fluid are the same, and are always very
pure.
-Chuck Harris
--
Richard Knoppow
dickburk@...
WB6KBL

Re: NEW to the group

Mlynch001
 
Edited

And NO! I do not want to EVER see that terrible force be used again. We should never forget how terrible war is, not just these bombs, which took the lives of a very small percentage of the 50 Million Plus lives that were lost in WWII.

--
Michael Lynch
Dardanelle, AR