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

Dave Brown
 

I have scanned the RPR for 366- Knobs and Pushbuttons and it is now posted on tekwiki.org. This completes the requested prefixes from from the RPR. In total the museum has scanned 4293 pages of the RPR. Enjoy.

vintageTEK museum

Re: vintageTEK museum releases Replaceable Parts Registry (RPR)

tek_547
 

Great work Dave and thanx for all the effort,
René

Re: WTB: W1 wire assembly for 7L12 (175-1317-00)

Leo Potjewijd
 

My hunch proved to be (partially) correct: it _was_ possible to delve out the front connector (the hardline part of the W1 assembly stayed put) without removing anything else, just extremely fiddly.
I needed the modified 5/16 wrench mentioned in the maintenance tools, I also had to loosen the 1st LO output connector on the front to get some toolroom.

As it turns out, some previous owner had assembled it incorrectly: the center conductor of the hardline was bent and pressed into the teflon(?) insulator instead of the designated female contact. This was most likely caused by the hardline not entering the front part absolutely straight.
It made contact, but only just.Over time, the contact got bad to the point that wiggling the connector caused it to fail.

I straightened the center conductor, remodelled the hardline to enter the frontpanel connector absolutely straight and carefully re-assembled it all. Successfully: measurements are once again bang on.
I apologize for not photo-documenting the whole operation; yet I'm quite happy I did not have to find an alternative to the W1 assembly...

Re: 7L5 spectrum analyzer extremely dimming the scope

NigelP
 

For what it's worth, I've got two 7L14 and they both had dead tantalums in the same analog area that prevented the 7K mainframe from running.

I was relieved to find that access to the offending caps was very manageable.... About 20 minutes work on each, once I'd identified the region of failure! I've no idea how 7L5 and 7L14 compare schematically.

Regards

Nigel G8AYM

Re: S-2 sampling head fault symptoms

Albert Otten
 

Also in in one of mine and of others S-2. A search for HSMS-8202 (not HSMS8202) shows several hits.
Albert

On Fri, Dec 14, 2018 at 06:14 PM, Dave Wise wrote:


For what it's worth, I had great results retrofitting HSMS8202's into my 1S1.
(One diode-pair per original diode.) They have been discussed before and seem
to be the go-to part for sampling.

Dave Wise
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Brian via
Groups.Io <brianas1948=yahoo.co.uk@groups.io>
Sent: Friday, December 14, 2018 6:55 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] S-2 sampling head fault symptoms

Chris
I would not bother with diodes like 1N4148 . I have successfully repaired
S1,S3A and to my surprise even an S6 sampling head using HSMS8202 diodes from
HP/Avago . These are cheap and easily obtainable on Ebay . The package is 2
series connected diodes ie. Half bridge but the best thing is the diodes in
each package are quite well matched . I think they would be a good choice to
start with repairing an S2 .
Good luck


Re: WTB: W1 wire assembly for 7L12 (175-1317-00)

 

Congratulations, Leo, well done!

Groet!

Raymond

Re: vintageTEK museum releases Replaceable Parts Registry (RPR)

 

Dave,

thank you so much for scanning that rpr on knobs, it is much appreciated.
I am hoping is solves a few mysteries for me.

I am curious to know if any kind of spec sheets exist for 120 transformers or 154 CRTs.
I gather there is something out there, but I have never seen it, nor have I see it in any of
the published parts indexes.

all the best,
walter

--
Walter Shawlee 2
Sphere Research Corp. 3394 Sunnyside Rd.
West Kelowna, BC, V1Z 2V4 CANADA
Phone: +1 (250-769-1834 -:- http://www.sphere.bc.ca
We're all in one boat, no matter how it looks to you. (WS2)
All you need is love. (John Lennon)
But, that doesn't mean other things don't come in handy. (WS2)

Re: vintageTEK museum releases Replaceable Parts Registry (RPR)

ArtekManuals
 

I 2nd Walter's request on the 120 transformers , (Voltage, Amps, specs per winding kind of thing)

Dave

manuals@...

On 12/15/2018 10:41 AM, walter shawlee wrote:
Dave,

thank you so much for scanning that rpr on knobs, it is much appreciated.
I am hoping is solves a few mysteries for me.

I am curious to know if any kind of spec sheets exist for 120 transformers or 154 CRTs.
I gather there is something out there, but I have never seen it, nor have I see it in any of
the published parts indexes.

all the best,
walter
--
Dave
Manuals@...
www.ArtekManuals.com

Re: vintageTEK museum releases Replaceable Parts Registry (RPR)

tom jobe <tomjobe@...>
 

Hi Walter,
Tekwiki has had a 154 RPR document for some time, maybe see if it's what you were hoping for?

On 12/15/2018 7:41 AM, walter shawlee wrote:
Dave,

thank you so much for scanning that rpr on knobs, it is much appreciated.
I am hoping is solves a few mysteries for me.

I am curious to know if any kind of spec sheets exist for 120 transformers or 154 CRTs.
I gather there is something out there, but I have never seen it, nor have I see it in any of
the published parts indexes.

all the best,
walter

Re: TEK 468 no power

Michael Wyatt
 

Just an update on what I have found so far.
1.The main switch was burnt.
2. Electrolytic cap C603 3uf 150v shorted
3. 10k resistor R328 in crt HV section burnt.
I checked all components I could be lifting one leg from the board. Everything checks, but without power it still just guessing.

Does this sound like a shorted transformer?

Michael
Sorry for the slow response I've had recent leg surgery and have been off my feet for a few weeks.

2465B/2467B NVRAM image, NVRAM hits cable, CAL proceedure

Jean-Paul
 

Hello all:

I have a nice 2467B and a 2465B, both were great until the dreaded TEST 04 FAIL 10/11 etc
Finally got around to pulling A5 board, removing the Dallas NVRAM, placing low profile machined pin socket and copying the cal NVRAM image.
Of course both had leaky SMD electrolytics, all now replaced, did some minor PCB rework, replaced a few SMD resistors, etc.

We now have suspicious image data, so probably failed NVRAM battery, as the newly written blank Dallas DS 1225 NVRAMs give same symptom.


QUESTIONS:

1. Are NVRAM images and data similar for 2465B and 2467B?

2. On 2465B A5 J4241 has a ribbon cable inserted, as it has Option 06 (Counter/Timer/Trigger)
But the AMP ribbon cable connector interferes with the NVRAM on the machined pin socket. Any solutions here?

3. With a very fully equipped lab, (eg TG501, PG506) and 50 yrs as an EE, but no specific 246xB cal experience, is there a steep learning curve to do a full cal? Perhaps 4 hrs min? Heard that If any of the 200 steps gives out of limit, the entire CAL fails at the end to write.

4. If I just use the default NVRAM images available, what is the effect on accuracy vs a full cal?

5. is the NVRAM image different for OPT 06 vs a no option unit?
Comments and thoughts appreciated!

Many thanks

Jon
Crypto-Museum

2465B/2467B NVRAM image, different cable, CAL proceedure

Jean-Paul
 

Hello all:

I have a nice 2467B and a 2465B, both were great until the dreaded TEST 04 FAIL 10/11 etc
Finally got around to pulling A5 board, removing the Dallas NVRAM, placing low profile machined pin socket and copying the cal NVRAM image.
Of course both had leaky SMD electrolytics, all now replaced, did some minor PCB rework, replaced a few SMD resistors, etc.

We now have suspicious image data, so probably failed NVRAM battery, as the newly written blank Dallas DS 1225 NVRAMs give same symptom.


QUESTIONS:

1. Are NVRAM images and data similar for 2465B and 2467B?

2. On 2465B A5 J4241 has a ribbon cable inserted, as it has Option 06 (Counter/Timer/Trigger)
But the AMP ribbon cable connector interferes with the NVRAM on the machined pin socket. Any solutions here?

3. With a very fully equipped lab, (eg TG501, PG506) and 50 yrs as an EE, but no specific 246xB cal experience, is there a steep learning curve to do a full cal? Perhaps 4 hrs min? Heard that If any of the 200 steps gives out of limit, the entire CAL fails at the end to write.

4. If I just use the default NVRAM images available, what is the effect on accuracy vs a full cal?

5. is the NVRAM image different for OPT 06 vs a no option unit?
Comments and thoughts appreciated!

Many thanks

Jon
Crypto-Museum

Re: 2465B/2467B NVRAM image, different cable, CAL proceedure

 

Im not sure what you mean by "suspicious image data" but I suspect you mean that you doubt the accuracy of the NVRAM contents.  So do I.  The NVRAM had become corrupt or unreadable when you first got the TEST 04 FAIL.  There are techniques that sometimes make a dead NVRAM accessible but they are involved with uncertain results.  Best advice is that your NVRAM cata is corrupt and needs calibration.
1.  NVRAM images for all 24xx series scopes are "similar" but not identical.  You might substitute one for the other but its unlikely to give decent results.  You would be better off loading data from a friendly 24xx of the same type, options and vintage (there are files with NVRAM images in our files section of this group).  But recalibration seems to me to be your best choice.
2.  I have no experience or recommendations regarding interference with Option 6 connectors.  Perhaps someone else here can help you.
3.  Calibration is involved but many here have done it.  You know as you go if it is working and "out of limits" steps can be repeated to correct the problem.  Other members here can give better advice than I on calibration.
4.  If you use "default" images from another scope you can expect at least 10% errors and perhaps 20% or more.
5.  I do not know.

On ‎Saturday‎, ‎December‎ ‎15‎, ‎2018‎ ‎04‎:‎52‎:‎16‎ ‎PM‎ ‎CST, Froggie the Gremlin <jonpaul@...> wrote:


Hello all:

I have a nice 2467B and a 2465B, both were great until the dreaded TEST 04 FAIL 10/11 etc
Finally got around to pulling A5 board, removing the Dallas NVRAM, placing low profile machined pin socket and copying the cal NVRAM  image.
Of course both had leaky SMD electrolytics, all now replaced, did some minor PCB rework, replaced a few SMD resistors, etc.

We now have suspicious image data, so probably failed NVRAM battery,  as the newly written  blank Dallas DS 1225 NVRAMs give same symptom.


QUESTIONS:

1. Are NVRAM  images and data similar for 2465B and 2467B?

2. On 2465B A5 J4241 has a ribbon cable inserted, as it has  Option 06 (Counter/Timer/Trigger)
But the AMP ribbon cable connector interferes with the NVRAM on the machined pin socket. Any solutions here?

3. With a very fully equipped lab,  (eg TG501, PG506) and 50 yrs as an EE,  but no specific 246xB cal experience, is there a steep learning curve to do a full cal?  Perhaps 4 hrs min? Heard that  If any of the 200 steps gives out of limit, the entire CAL fails at the end to write.

4. If I just use the default NVRAM images available, what is the effect on accuracy vs a full cal?

5.  is the NVRAM image different for OPT 06 vs a no option unit?
Comments and thoughts appreciated!

Many thanks

Jon
Crypto-Museum

Re: 2465B/2467B NVRAM image, NVRAM hits cable, CAL proceedure

Chuck Harris
 

NVRAM is similar between the models, but there are a few
additions, and a few subtractions in the 2467 data. The
data from one 2465B is mostly useless to another.

Calibration is well described in the calibration routine in the
manual. Follow the steps in the order shown, and you should
do all right. There are a couple of tricky spots. If you
run into trouble, ask a specific question, and I would be
glad to help.

-Chuck Harris

Froggie the Gremlin wrote:



Hello all:

I have a nice 2467B and a 2465B, both were great until the dreaded TEST 04 FAIL 10/11 etc
Finally got around to pulling A5 board, removing the Dallas NVRAM, placing low profile machined pin socket and copying the cal NVRAM image.
Of course both had leaky SMD electrolytics, all now replaced, did some minor PCB rework, replaced a few SMD resistors, etc.

We now have suspicious image data, so probably failed NVRAM battery, as the newly written blank Dallas DS 1225 NVRAMs give same symptom.


QUESTIONS:

1. Are NVRAM images and data similar for 2465B and 2467B?

2. On 2465B A5 J4241 has a ribbon cable inserted, as it has Option 06 (Counter/Timer/Trigger)
But the AMP ribbon cable connector interferes with the NVRAM on the machined pin socket. Any solutions here?

3. With a very fully equipped lab, (eg TG501, PG506) and 50 yrs as an EE, but no specific 246xB cal experience, is there a steep learning curve to do a full cal? Perhaps 4 hrs min? Heard that If any of the 200 steps gives out of limit, the entire CAL fails at the end to write.

4. If I just use the default NVRAM images available, what is the effect on accuracy vs a full cal?

5. is the NVRAM image different for OPT 06 vs a no option unit?
Comments and thoughts appreciated!

Many thanks

Jon

Re: Smashed CRT on a 2215 - where to find a substitue?

eksund1900@...
 

Thank You for your input, and sorry for my late reply.

I live in sweden. I purchased the scope for just over $100.
I have got the money back from the shipping company.

I have search the web but could not find any tube with a price
witch justifyes a repair. What I have seen is tube cost of around $150 + shipping.

Therefore I will wait for another opportunity to buy a cheap TEK-scope.

I still have two other analogues scopes, a GWInstek and a Hameg, but it is a
22xx Tektronix I really want.
I do not know why, but the 22xx series is for me the way a scope should look.
Maybe it i just nostalgia, we used them in school, loooong time ago.

Re: Smashed CRT on a 2215 - where to find a substitue?

Adrian
 

Hi,

I have a couple of 2215 scopes to dispose of. One works (or did when I last used it ten years ago) but the focus is a bit off even with the control at the end-stop, just the resistor chain issue I suspect, as I recall it is a bunch of 1M(?) resistors in series that go high with age? The other is a potential parts unit which I was told just has a PSU issue - I was given that one for free.

These are free to a good home, or in the case of Sweden, just for the postage. A quick look on a parcel website seems to show DPD could get the pair of them to you from the UK for about 40 Euro, but there may be cheaper ways (some guy in a red suit with a bunch of reindeer is due through soon I believe?)

If you are interested let me know and I'll explore the options in more detail.

Adrian

On 12/16/2018 7:40 AM, eksund1900 via Groups.Io wrote:
Thank You for your input, and sorry for my late reply.

I live in sweden. I purchased the scope for just over $100.
I have got the money back from the shipping company.

I have search the web but could not find any tube with a price
witch justifyes a repair. What I have seen is tube cost of around $150 + shipping.

Therefore I will wait for another opportunity to buy a cheap TEK-scope.

I still have two other analogues scopes, a GWInstek and a Hameg, but it is a
22xx Tektronix I really want.
I do not know why, but the 22xx series is for me the way a scope should look.
Maybe it i just nostalgia, we used them in school, loooong time ago.

Re: Smashed CRT on a 2215 - where to find a substitue?

satbeginner
 

Hello Adrian,

I am interested in one of the non-working 2215's as a hobby winter-project.
I am a Dutch retired tech, living in Spain, if eksund1900 does not take them all, please consider shipping one to me?

If possible contact me off-line for shipping details and costs,

Un saludo,

Leo

P.S. for nostalgic reasons I am also looking for a 475A ...

Re: 2465B/2467B NVRAM image, different cable, CAL proceedure

Jean-Paul
 

Hello Chuck and MachineGuy!

1/ Yes suspicious looking hex data in both NVRAMs, so I assume the data is useless.

2/ I found both 2467B and 2465B default NVRAM images.

3/ Agree on CAL, I would use the PG506 instead of the TD pulser for the fast rise cals.

4/ Identified OPT 06 as CTT, there is an option board tucked near the PSU. Cable from option board interferes with NVRAM on low profile machined pin socket. Have to fix that.

5/ Plan is to try the default images just to check if the hardware rework on A5 board is OK, then to setup to do the full CAL.

Re: 2465B/2467B NVRAM image, different cable, CAL proceedure

Chuck Harris
 

A full cal is a much better and more meaningful test of whether
your rework was done properly. Typically, what you did to the A5
board would be fully tested in the first section of calibration
where you calibrate the power supply and the DAC reference.

Your scope coming up with a the Test04 ERR 1x error does nothing
to prevent you from using your scope. Just dismiss the message and
move on. If you clear your NVRAM with your programmer, and install
it in your scope, default calibration constants will be applied, and
that is just as good as using a bogus NVRAM image from some other
scope.... It will allow you to do the only meaningful function you
can do with an uncalibrated 2465B: test and calibrate your scope.

The only reason I can think of that these bogus images for NVRAMS exist
is so that the owner of a scope with broken calibration can demonstrate
the scope as working with old but good calibration. The only reason
I can think of to want to do that is deceit.

You cannot calibrate the transient response of a 2465[ ,A,B] scope with
a PG506, without a fast rise time pulser such as the TD pulser. You
would be better off leaving the Transient Response section alone until
you have the necessary calibration equipment.

As an aside: I have ordered one of Leo Bodner's inexpensive pulsers,
in order to evaluate it's use for transient calibration of 2465's.

I will report my findings and opinion to the group.

-Chuck Harris

Froggie the Gremlin wrote:

Hello Chuck and MachineGuy!

1/ Yes suspicious looking hex data in both NVRAMs, so I assume the data is useless.

2/ I found both 2467B and 2465B default NVRAM images.

3/ Agree on CAL, I would use the PG506 instead of the TD pulser for the fast rise cals.

4/ Identified OPT 06 as CTT, there is an option board tucked near the PSU. Cable from option board interferes with NVRAM on low profile machined pin socket. Have to fix that.

5/ Plan is to try the default images just to check if the hardware rework on A5 board is OK, then to setup to do the full CAL.

Re: vintageTEK museum releases Replaceable Parts Registry (RPR)

 

tom,

sadly, the RPR's contain virtually no data on the 154 tubes or 120 transformers, only where and when they are used. A real data sheet with specs would be incredibly useful sometimes for substitutions and re-use of the parts. that data exists for all the 151, 152, 153, 155, a56 parts, but I have never seen it for 120 or 154 parts, hence my query.

regards,
walter