开云体育

I am looking for the following Personality Modules for the 7D02 Software
Logic Analyzer Plugin. Please contact me off list at dennis at ridesoft dot
com if you can help.
It is very important that I find these three:
PM-111 6809 PERSONALITY MODULE
PM101 Option 02 6502 PERSONALITY MODULE
PM102 6800 PERSONALITY MODULE

It would be nice to find these two:
PM101 Option 01 8080 PERSONALITY MODULE
PM-111 6809 PERSONALITY MODULE

I don't have much hope of ever finding these three:
PM-110 Z8001 PERSONALITY MODULE
PM-108 Z8002 PERSONALITY MODULE
PM-112 MULTIBUS PERSONALITY MODULE

The 7D02 is a software logic analyzer plugin for the 7000 series as opposed
to the 7D01 which is a hardware logic analyzer plugin. The difference is
night and day.
* The 7D01 hardware logic analyzer can help you analyze a computer bus or
any system with a lot of interconnected signals by simultaneously capturing
the timing relationship of up to 16 signals.
* The 7D02 software logic analyzer disassembles the addresses and software
instructions being executed by a CPU as it steps through its instructions
and reads or writes data. In order to do this the 7D02 requires a
Personality Module for the particular CPU it will be analyzing. The
Personality Module intercepts each software instruction and converts it to
human readable instructions and provides this along with the address of the
instruction, the data being fetched or written, etc.

The useful product lifetime of a logic analyzer is extremely short in part
because they are extremely difficult to develop and just about the time they
are ready for market the CPU manufacturers come out with newer architectures
that make the logic analyzers obsolete. In addition, logic analyzers are
very expensive the entire development cost will have to be spread across
relatively few customers. A side effect of that is to make customers even
more reluctant to invest in something that costs so much if the costs can't
be amortized over at least 5 years.

Bottom line: Not many 7D02 logic analyzers were ever sold. In order to use
the 7D02 you had to also buy the right Personality Module to go with it.
Tektronix made 12 different personality modules for the 7D02. These are
rather small and easy to be misplaced. After a customer completed
development of their product the 7D02 would be put in a cabinet and probably
never get used again. The personality module would eventually get separated
from the logic analyzer and, since it didn't look like much, eventually it
would get tossed.

By now the personality modules are almost impossible to find. I have a
particularly romantic attachment to the 16-bit CPUs that were prominent in
the mid to late 1970s when I built my first personal computer. I learned how
to write assembly language for several of those CPUs and disassembling the
firmware that is running on these simple CPUs, and debugging the code is
some of the most challenging fun I can have.

Any help locating the personality modules I am looking for would be greatly
appreciated.

Dennis Tillman W7pF

On 2020-07-02 1:00 a.m., John Gord via groups.io wrote:

Toby,

If it is a hard, brittle ceramic-like slab, it is probably alumina (aluminum oxide). It is a good electrical insulator and a reasonably good thermal conductor. Beryllium oxide looks similar, but is unlikely here because of its hazards.

That sounds probable. It sure is brittle, while this board was hard to
remove, there would have been no major shocks, so I was surprised to see
it shattered.

Hope I can replace it, or is there a better alternative now?


--Toby

--John Gord

On Wed, Jul 1, 2020 at 08:52 PM, <toby@...> wrote:

Hi,

In preparation for testing/replacing components on the HV & regulator
board, I removed it, and seem to have accidentally broken one of the
heatsink pads under a bottom transistor (see pic).

What is this material?
/g/TekScopes/photo/249616/0?p=Created,,,20,2,0,0

Should it be used with thermal paste or not?

Thanks
--Toby

Toby,
It looks like the part number is 342-0082-00, described as an insulator plate, 0.52" x 0.52" x 0.015", material: alumina (aluminum oxide).
It is likely used with thermal compound added,
--John Gord

Toby,

If it is a hard, brittle ceramic-like slab, it is probably alumina (aluminum oxide). It is a good electrical insulator and a reasonably good thermal conductor. Beryllium oxide looks similar, but is unlikely here because of its hazards.

--John Gord

Toby,

I believe that is Mylar. You can find this out for certain in one of the many resources in TekWiki.

Most I have seen have some sort of thermal compound.

--
Michael Lynch
Dardanelle, AR

Hi,

In preparation for testing/replacing components on the HV & regulator
board, I removed it, and seem to have accidentally broken one of the
heatsink pads under a bottom transistor (see pic).

What is this material?
/g/TekScopes/photo/249616/0?p=Created,,,20,2,0,0

Should it be used with thermal paste or not?

Thanks
--Toby

Hi Albert,

sorry for the late reply but during the week I work hardly and in the evening I am too tired to take care of my Teks and I want to avoid mistakes.

Anyway I took just now some photos of the pulser while operating, varying the positive supply between 13.5 V and 15.5 V, in 0.5 V intervals.
I've created a new photo album, you can see it at the following link:

/g/TekScopes/album?id=249667

NOTE: The TD is the original one, carefully reassembled .
The optimal voltage seems to be around 14.5V. The pulse are stable and clean.NOTE: The TD is the original one, carefully reassembled .
You can see, at 15V the impulse disappears and only the impulse of pre-bias with the ramp remains.

The pot R90 (trig level) is almost fully counterclockwise (it's in the original position when I bought the thing).
At 15V ,turning it completely ccw I do not get appreciable effects anyway

I think the resistors, one or more, changed their values,
In the weekend I will check carefully their values.
I can confirm that the couple of 2.7 ohm resistors in parallel give me a reading of 2.8 ohm and not 1.4 as it should be ...

Max

Reg,
I would be interested. could you provide more detail?
Ray,
W4BYG at ATT dot net

--
This email has been checked for viruses by AVG.

At least two of them.

On Mon, Jun 29, 2020 at 1:41 AM snapdiode via groups.io <snapdiode=
[email protected]> wrote:

Can you see it?



I thought it was funny.

Ahhh I see, so it's a feature not a fault, Denises explanation is really thorough and easy to understand.
Since I replaced the Telequipment special blanking JFET with generic J113 I wasn't sure if what I'm seeing isn't insufficiently closed jfet and therefore what I'm seeing is not some aftereffect of returning blanked beam.
It's good to learn there's nothing wrong with the machine

That's great Max. Good job. They are nice little scopes.

Regards,

Tom

--
This email has been checked for viruses by Avast antivirus software.

Yep - I replaced them all just for good measure!

On Wed, Jul 1, 2020 at 09:10 AM, <tekscopegroup@...> wrote:

While in there you might want to replace all the caps that where listed above,
so as to future proof the PS section some more.

This is Very Good advice. I would not go into a scope and just replace one of the caps. They all can easily be in a similar condition in the near future.
--
Michael Lynch
Dardanelle, Arkansas

While in there you might want to replace all the caps that where listed above, so as to future proof the PS section some more. Use nearest value and voltage equal or higher. Modern caps will be smaller in size, so a somewhat higher value will still be an easy fit. Order good quality caps (and any other parts in general) from Mouser.com or similar reputable outfits, avoid ebay china crap.

C937 1800 uF/ 75 V --> Use 2200uF 100V
C961 33 uF/ 160 V --> Use 33uF 160V
C965 270 uF/ 40 V --> Use 330uF 50V
C971, 972, 975, 976, 985 840 uF/ 12 V --> Use 1000uF 16V

Hi Ondrej,
see that post:

/g/TekScopes/message/157201

The shadow / flare effect is explained

Bye
Max

Sorry that should say "and I noticed the 33uF/160V on the 100V PSU output WAS DAMAGED, I REPLACED IT,...."

Good news! I replaced the PSU filter caps, and I noticed the 33uF/160V on the 100V PSU output, and it's all good!

Looking at the base of this capacitor, it was quite obvious that it was the failed one, the black epoxy has come off near one of the legs and when I attempt to measure it's capacitance on my (cheap) multi-meter it reads almost 0nF. In fact, I think the black epoxy had come off under such pressure that it pushed the cap up, and crack the solder joint!

Look at the difference nice new caps have !

Thanks very much for your help, Tom, very much appreciated!

Max

Hi,

I've been working on a 603 XY and began by recapping and testing on
Variac, which cleared up display bloom and a squiggle.

What I have now is:
* a somewhat defocused (2-3mm), very bright spot
* unresponsive intensity control
* focus control has effect but cannot focus spot

All the above seems to indicate a HV issue. I am waiting on a HV probe
so I don't have a measurement yet. But, possibly related:

Was not able to bring the -30V into spec, rails currently measure
+215: about 250
+15: about 17.7
-30: about -36

The -30V adjustment is R878 trimmer but it has no effect on the voltage.

I'm looking at the regulator section schematic, I've checked the VR870
zener and it's nominal ~ 6.2V.

I'm pretty new to repair so I was hoping for a pointer or two to where I
could look at re this initial inability to regulate or trim -30V.

I believe this is the most relevant part of the schematic:
/g/TekScopes/photo/249616/0?p=Created,,,20,2,0,0

--Toby

Hi chipbee40
Yes, I am on 220v
Thanks

Hi chipbee40
Thanks for your concern and suggestion.
For c906 I had replaced by 100uf 450v type. And now I checked out of the circuit the esr meter shows 98uf and 0.34 esr.
Thanks
Saroj