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Date
Re: 468 still

 

lop pol
Dec 17 #153208

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.
Artekmedia
Dec 17 #153209

+13volts
You need to get a better manual copy ...I know just the place
Dave
manuals@...

On Tue, Dec 18, 2018 at 12:38 PM, Roger Evans wrote:


I have a mediocre PDF file of the 468 manual, Artek's manuals are highly
recommended and Dave is extremely helpful, to the point of finding and
scanning a missing page from an obscure manual that I purchased from him.

My mediocre copy seems to say +13.0V on the base of Q958. Have you noticed
that C869 which has nearly 15V across it is rated only at 15V?

Roger
Yes I did notice that and replaced it with a 25V tantalum. This thing has me totally stumped. Thanks for the reply.
Re: 468 still

 

I have a mediocre PDF file of the 468 manual, Artek's manuals are highly recommended and Dave is extremely helpful, to the point of finding and scanning a missing page from an obscure manual that I purchased from him.

My mediocre copy seems to say +13.0V on the base of Q958. Have you noticed that C869 which has nearly 15V across it is rated only at 15V?

Roger
Re: TDS3032 does not boot. LCD backl-ight and fan working.

 

I didn't see any other responses or follow ups in the Tek News Group.

Did you figure out your TDS3032 problem?

The EEVBlog Forums might be another good resource to check out.

Dave

On Sat, Dec 8, 2018 at 10:46 AM benj3867 via Groups.Io <benj3867=
[email protected]> wrote:

Thanks Dave.
I suspected that a bad NVRAM will let the scope at least get as far as the
DPO splash screen.

I guess I have a deeper problem.

Can anybody else suggest where I should look?
Re: 468 still

 

I have a pretty clear jpg of the A15 schematic but I have not been able to log on to the site. PM me your address and I will send it to you.
Michael

On Monday, December 17, 2018, 9:26:49 PM EST, lop pol via Groups.Io <the_infinite_penguin@...> wrote:

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 :)
Re: Which probes fit 7A14 module ?

 

On Tue, 18 Dec 2018 15:06:39 +0000, you wrote:

P6019 and P6020 are compatible ancestors to P6021 and P6022 and should work fine too.
The coding ring changes the gain and compensation to match the transformer characteristics. It is the same as the Probe Type switch on the front of the Type 134 Current Probe Amplifier.
Does anyone have information on that coding ring?

Harvey



Dave Wise
________________________________________
From: [email protected] <[email protected]> on behalf of Harvey White <madyn@...>
Sent: Tuesday, December 18, 2018 6:41 AM
To: [email protected]
Subject: Re: [TekScopes] Which probes fit 7A14 module ?

On Tue, 18 Dec 2018 11:03:25 +0100, you wrote:

Dear List,

could you please help me, which probes fit the 7A14 current amplifier ?
P6021, P6022 per the manual, however, the default probe is a P6022.
For use with a P6021, you must ground the ring around the BNC. There
was a modification to the probe (a coding ring) that could do that.
Alternatively, you could modify an old (and dead) probe compensation
box to ground the ring.

The manual does not mention any other current probes.

Harvey


Thank you

Jan
Re: 7T11 horizontal memory

 

(continued) Ah.. I meant 3rd RT of course, not 3rd ET range. Albert
Re: 7T11 horizontal memory

 

Hi Chris,
Without quoting here all the previous stuff I like to visit these findings once more:


The risetime thing is interesting. If I use the 7T11 in real-time mode with my S-1 head, the risetime is about 100us.
However, in equivalent-time mode, I can quite easily see the 350ps risetime of the head and the waveform looks accurate.

With my least-broken S-2 head, the risetime in real-time mode is definitely faster than with the S-1. But the waveform
as seem through the S-2 is definitely not accurate, though in equivalent-time mode the its risetime is fast (definitely better than 100ps).
In my opinion it's impossible to study these fast rise times in real time mode. The 7S11 sampling moments are quite random compared to the 7T11 sweep start moments. Suppose you have the "true" rising edge located somewhere on the sweep. The fraction of sweeps which show a sample dot on the rising edge is very small. So you see dots mostly at the bottom and the top line, and seldom an intermediate dot. Also the last dot in a sweep before the start of the edge is sampled most often quite some time before the start of the edge. Similarly the first dot after the edge is mostly much farther to the right on the screen. So was my observation at 500 ps/div at the 3rd ET range and 200 ps rise time. If you look at "some distance" then you might have the impression that the rise time is rather long. If you look at how far the bottom line dots appear to the right and the top line dots to the left, then you notice just a small time gap between those two, more realistic for the true rise time.

Albert
Re: Which probes fit 7A14 module ?

 

P6019 and P6020 are compatible ancestors to P6021 and P6022 and should work fine too.
The coding ring changes the gain and compensation to match the transformer characteristics. It is the same as the Probe Type switch on the front of the Type 134 Current Probe Amplifier.

Dave Wise
________________________________________
From: [email protected] <[email protected]> on behalf of Harvey White <madyn@...>
Sent: Tuesday, December 18, 2018 6:41 AM
To: [email protected]
Subject: Re: [TekScopes] Which probes fit 7A14 module ?

On Tue, 18 Dec 2018 11:03:25 +0100, you wrote:

Dear List,

could you please help me, which probes fit the 7A14 current amplifier ?
P6021, P6022 per the manual, however, the default probe is a P6022.
For use with a P6021, you must ground the ring around the BNC. There
was a modification to the probe (a coding ring) that could do that.
Alternatively, you could modify an old (and dead) probe compensation
box to ground the ring.

The manual does not mention any other current probes.

Harvey


Thank you

Jan
Re: Which probes fit 7A14 module ?

 

On Tue, 18 Dec 2018 11:03:25 +0100, you wrote:

Dear List,

could you please help me, which probes fit the 7A14 current amplifier ?
P6021, P6022 per the manual, however, the default probe is a P6022.
For use with a P6021, you must ground the ring around the BNC. There
was a modification to the probe (a coding ring) that could do that.
Alternatively, you could modify an old (and dead) probe compensation
box to ground the ring.

The manual does not mention any other current probes.

Harvey


Thank you

Jan
Re: More stuff found For sale, 7000 series on cart and 7834, many modules

 

Yes, that I know. But there is a "ZS11" on the list, separate from the 7S11 item listed.

On 12/18/2018 8:01 AM, Artekmedia wrote:
Dave

7S11 is just that a Sampling unit that the S series sample heads plug in to

Dave

On 12/18/2018 7:22 AM, Dave Daniel wrote:
What is a ZS11? Is that possibly a typo?

DaveD


On 12/13/2018 11:48 AM, devin davison wrote:
Hello again. Spent some time here taking inventory, Here is a partial
listing of the plug in modules that I have Availible.
The is some more in storage, once i get over there I will update the
listing. I also uploaded some more images to the image gallery of what I
have in stock.

Mram tektronics equipment listing

7B53A Dual time base Quantity x9
7A18 Dual trace ampl Quantity x12
5A48 Dual prace ampl Quantity X1
7A26 Dual trace ampl Quantity x13
7A15A Aplifier Quantity x1
7A19 Aplifier Quantity x9
7S11 Sampling unit Quantity x9
7S12 TDR/Sampler Quantity x1
7A16A Aplifier Quantity x3
7B92 Dual time base Quantity x1
AM503 Current probe ampl Quantity x1
Am-6565 Amplifier Quantity X3
7B71 Delaying time base Quantity X1
7A13 Differential Comparator Quantity X2
7A11 Aplifier Quantity X3
7A29 Aplifier Quantity X2
7B85 Delaying time base Quantity X3
7B10 Time baase Quantity X1
7B15 Time Base Quantity X2
7B80 Time Base Quantity X2
7B87 TB with pretrigger clock Quantity X2
TD1085/U Dual Time Base Quantity X1
7A18A Dual trace ampl Quantity X6
7A24 Dual trace ampl Quantity X4
DL2 Digital latch Quantity X1
7D01 Logic Analizer Quantity X1
5B10N Time B/ampl Quantity X1
DF2 Display formatter Quantity X1
7M13 Readout UNit Quantity X1
ZS11 sampling unit Quantity X1
7D15 225MHZ counter/timer Quantity X2

7834 Storage oscilloscope with 7A26 plug in
T922 Dual trace Scope 15 MHZ - working


If you have interest in any of this, please let me know.

--Devin D.

On Tue, Dec 11, 2018 at 4:29 PM devin davison <lyokoboy0@...> wrote:

Greetings. I hope that these listings are not bothering anyone, I am
overstocked on this stuff and trying to find it a good home. I found
another scope on a cart in storage, a 7000 series. It powers up but i am
unable to get a trace. I also have a 7834, although i havent gotten arount
to testing that one out.

Also, a metric ton of 7000 series modules. Many of them are too high up on
the shelf for me to see the module numbers at the moment, i need to take
time to take inventory and list them all out here. I am open to offers on
any of this equipment.

Again, it is all located in Melbourne Fl, and i would be happy to ship if
needed.



--Devin D.
Re: More stuff found For sale, 7000 series on cart and 7834, many modules

 

Dave

7S11 is just that a Sampling unit that the S series sample heads plug in to

Dave

On 12/18/2018 7:22 AM, Dave Daniel wrote:
What is a ZS11? Is that possibly a typo?

DaveD


On 12/13/2018 11:48 AM, devin davison wrote:
Hello again. Spent some time here taking inventory, Here is a partial
listing of the plug in modules that I have Availible.
The is some more in storage, once i get over there I will update the
listing. I also uploaded some more images to the image gallery of what I
have in stock.

Mram tektronics equipment listing

7B53A Dual time base Quantity x9
7A18 Dual trace ampl Quantity x12
5A48 Dual prace ampl Quantity X1
7A26 Dual trace ampl Quantity x13
7A15A Aplifier Quantity x1
7A19 Aplifier Quantity x9
7S11 Sampling unit Quantity x9
7S12 TDR/Sampler Quantity x1
7A16A Aplifier Quantity x3
7B92 Dual time base Quantity x1
AM503 Current probe ampl Quantity x1
Am-6565 Amplifier Quantity X3
7B71 Delaying time base Quantity X1
7A13 Differential Comparator Quantity X2
7A11 Aplifier Quantity X3
7A29 Aplifier Quantity X2
7B85 Delaying time base Quantity X3
7B10 Time baase Quantity X1
7B15 Time Base Quantity X2
7B80 Time Base Quantity X2
7B87 TB with pretrigger clock Quantity X2
TD1085/U Dual Time Base Quantity X1
7A18A Dual trace ampl Quantity X6
7A24 Dual trace ampl Quantity X4
DL2 Digital latch Quantity X1
7D01 Logic Analizer Quantity X1
5B10N Time B/ampl Quantity X1
DF2 Display formatter Quantity X1
7M13 Readout UNit Quantity X1
ZS11 sampling unit Quantity X1
7D15 225MHZ counter/timer Quantity X2

7834 Storage oscilloscope with 7A26 plug in
T922 Dual trace Scope 15 MHZ - working


If you have interest in any of this, please let me know.

--Devin D.

On Tue, Dec 11, 2018 at 4:29 PM devin davison <lyokoboy0@...> wrote:

Greetings. I hope that these listings are not bothering anyone, I am
overstocked on this stuff and trying to find it a good home. I found
another scope on a cart in storage, a 7000 series. It powers up but i am
unable to get a trace. I also have a 7834, although i havent gotten arount
to testing that one out.

Also, a metric ton of 7000 series modules. Many of them are too high up on
the shelf for me to see the module numbers at the moment, i need to take
time to take inventory and list them all out here. I am open to offers on
any of this equipment.

Again, it is all located in Melbourne Fl, and i would be happy to ship if
needed.



--Devin D.




--
Dave
Manuals@...
www.ArtekManuals.com
Re: More stuff found For sale, 7000 series on cart and 7834, many modules

 

What is a ZS11? Is that possibly a typo?

DaveD

On 12/13/2018 11:48 AM, devin davison wrote:
Hello again. Spent some time here taking inventory, Here is a partial
listing of the plug in modules that I have Availible.
The is some more in storage, once i get over there I will update the
listing. I also uploaded some more images to the image gallery of what I
have in stock.

Mram tektronics equipment listing

7B53A Dual time base Quantity x9
7A18 Dual trace ampl Quantity x12
5A48 Dual prace ampl Quantity X1
7A26 Dual trace ampl Quantity x13
7A15A Aplifier Quantity x1
7A19 Aplifier Quantity x9
7S11 Sampling unit Quantity x9
7S12 TDR/Sampler Quantity x1
7A16A Aplifier Quantity x3
7B92 Dual time base Quantity x1
AM503 Current probe ampl Quantity x1
Am-6565 Amplifier Quantity X3
7B71 Delaying time base Quantity X1
7A13 Differential Comparator Quantity X2
7A11 Aplifier Quantity X3
7A29 Aplifier Quantity X2
7B85 Delaying time base Quantity X3
7B10 Time baase Quantity X1
7B15 Time Base Quantity X2
7B80 Time Base Quantity X2
7B87 TB with pretrigger clock Quantity X2
TD1085/U Dual Time Base Quantity X1
7A18A Dual trace ampl Quantity X6
7A24 Dual trace ampl Quantity X4
DL2 Digital latch Quantity X1
7D01 Logic Analizer Quantity X1
5B10N Time B/ampl Quantity X1
DF2 Display formatter Quantity X1
7M13 Readout UNit Quantity X1
ZS11 sampling unit Quantity X1
7D15 225MHZ counter/timer Quantity X2

7834 Storage oscilloscope with 7A26 plug in
T922 Dual trace Scope 15 MHZ - working


If you have interest in any of this, please let me know.

--Devin D.

On Tue, Dec 11, 2018 at 4:29 PM devin davison <lyokoboy0@...> wrote:

Greetings. I hope that these listings are not bothering anyone, I am
overstocked on this stuff and trying to find it a good home. I found
another scope on a cart in storage, a 7000 series. It powers up but i am
unable to get a trace. I also have a 7834, although i havent gotten arount
to testing that one out.

Also, a metric ton of 7000 series modules. Many of them are too high up on
the shelf for me to see the module numbers at the moment, i need to take
time to take inventory and list them all out here. I am open to offers on
any of this equipment.

Again, it is all located in Melbourne Fl, and i would be happy to ship if
needed.



--Devin D.
Re: 7T11 horizontal memory

 

On Tue, Dec 18, 2018 at 03:48 AM, cmjones01 wrote:
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...
Curiosity got the better of me and I replaced Q184 with a BC558 found on a random scrap PCB. Now everything seems to work again the way it did before, which is a relief. I've put the covers back on before I do any more damage!

Chris
Re: 7T11 horizontal memory

 

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
Re: Which probes fit 7A14 module ?

 

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
<> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: W¨¹sten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan W¨¹sten; UStID: DE814610403

Wichtige Informationen:
Unsere Datenschutzerkl?rung: <>
Widerrufsformular als PDF: <>
Kontakt und Bestellabwicklung: <>
Unsere vollst?ndigen AGB: <>







| | Virus-free. www.avg.com |
Re: Which probes fit 7A14 module ?

 

Tekwiki:

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
<> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: W¨¹sten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan W¨¹sten; UStID: DE814610403

Wichtige Informationen:
Unsere Datenschutzerkl?rung: <>
Widerrufsformular als PDF: <>
Kontakt und Bestellabwicklung: <>
Unsere vollst?ndigen AGB: <>
Which probes fit 7A14 module ?

 

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
<> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: W¨¹sten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan W¨¹sten; UStID: DE814610403

Wichtige Informationen:
Unsere Datenschutzerkl?rung: <>
Widerrufsformular als PDF: <>
Kontakt und Bestellabwicklung: <>
Unsere vollst?ndigen AGB: <>
looking for 2465 service manual

[email protected]
 

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
Re: 468 still

 

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 :)
Re: 468 still

 

+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
55581 - 55600 of 208746