Date   

We have multiple Owners. WAS: Do we need multiple owners?

 

Hi David,
This reminds me of something Mark Twain once said: "Reports of my death have
been greatly exaggerated" :)

Michael Dunn, who created TekScopes 20 years ago, is still very much
involved in TekScopes. He acts as my back stop any time I am on the road or
too busy to respond quickly. We are in regular communication. Any messages
sent to the Moderator go to both of us. We both have full moderator
authority to do whatever is needed. It was Michael who saw the need a few
years ago to insure a 2nd person could take over in the event something
happened to him.

For the past 2 or 3 years we have shared the load on the important items and
I have looked after the day to day stuff. For instance Michael, more than I,
was instrumental in choosing Groups.io more than 2 years ago. We both
handled the logistics of the move. I am the main contact point between
TekScopes and Groups.io.

Both of us will be responsible for the contributions jointly so they will be
safe if something happens to either one of us. We are also in different
geological areas and in different countries (I'm on the northwest coast of
the United States and Michael is much further east in Ontario, Canada).

Dennis Tillman W7PF,

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: Wednesday, January 01, 2020 8:44 AM
Subject: [TekScopes] Do we need multiple owners?

Given Dennis' comments about his age, might it be a good idea to add one or
more of our current moderators or members as co-owners?

That way we avoid the problem of "silent key" owner resulting in an orphaned
group.

David




--
Dennis Tillman W7PF
TekScopes Moderator


Re: My email address was changed by Groups.io my request for contributions

 

Marvin,
My apologies but groups.io is partially to blame. I had no idea that groups.io was going to change my email address. Since this happened I found out they do this to protect us from SPAMBots who could easily harvest all our email addresses.
The only way that they would not have interfered with is if I spelled out my address word for word like this
Dennis at ridesoft dot com.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Marvin Moss
Sent: Wednesday, January 01, 2020 7:44 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] My email address was changed by Groups.io my request for contributions

I sent you money via Paypal but it went to wrong place. So I have to get my money back before I can forward to you. A real mess-up for me. Wish we had better info to get money to you. It is a shame that it is that hard to send you money :-)




--
Dennis Tillman W7PF
TekScopes Moderator


Re: My email address was changed by Groups.io my request for contributions

 

HI Albert,
Groups.io changed my real email address without my knowing it so non-members could not search our posts and harvest our email addresses. I didn't know this is what groups.io did. The only wat I can tell you what the correct email address is if I spell it out like this:
dennis at ridesoft dot com.
You can figure out from this what my email address really is.
Dennis

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Albert Otten
Sent: Wednesday, January 01, 2020 3:29 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] My email address was changed by Groups.io my request for contributions

There is one more issue Dennis. I use the website. There @Dennis... is a link which points to https://groups.io/profile/Dennis_Tillman_W7PF . This is not your profile at Tekscopes since /g/Tekscopes is missing from the path. I can read your Tekscopes profile, but I get a "404 not found" error on that link.

Albert




--
Dennis Tillman W7PF
TekScopes Moderator


Re: TDS694C nvram and tektool

Ragnar S
 

Hi Gudjon,

(I tried to reply using the Web interface some hours ago, but for some reason that didn’t work. If it later does, I am sorry for the double replies.)

Do I need to flip the nvram protection switch to read the content?
At least I have to boot them with the nvram protection switch flipped on 694C:s with FW v6.3e and v6.4e.
Note that they then get address 29.
Also note that the scope appears more or less dead in this mode, but it responds to GPIB.
I have found versions of tektool that have the address 1 coded in, so maybe on some models or firmware versions they work with the scope booted normally.

I actually just recently modified tekfwtool (and tektool and getcaldata) to work on Linux (and ARM), and published it this morning.
It should be quite possible to make it work on MacOS too, perhaps using macosx_gpib_lib, but I haven’t tried.

You can find it here:
https://github.com/ragges/tektools

Let me know if you need any assistance, or debug output, or something. I have the setup rigged up in front of me, and can test things if you want to.

In my testing, it was quite sensitive to extra commands. For example, a “*IDN?” in NVRAM unprotected mode screwed up the communication.

Best regards,

Ragnar


Re: TDS694C nvram and tektool

Ragnar S
 

Hi Gudjon,

This is really funny - I have too played around with tektool (and tekfwtool, getcaldata and tdsNvramFloppyTool) on Linux just the last days, working on TDS 694C:s.

So reading the NVRAM and firmware actually works for you when the scope is booted normally (without having flipped the NVRAM protection rocker switch), on GPIB address 1?
Does writing work too?

I have so far only gotten it to work in unprotected mode (which also sets the GPIB address to 29).

Also, if I leave the "*IDN?" request in the tektool program, it will not work in unprotected mode, so I have commented that out.
I have firmware version v6.3e and v6.4e.

Here is a link to my versions of the programs:
https://github.com/ragges/tektools

Best regards,
Ragnar


Re: Do we need multiple owners?

Colin Herbert
 

I think that Dennis was joking, but I believe that there are indeed two
co-owners of the group. If I am wrong, Dennis will no doubt put me right.
Happy New Year to all, by the way.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of David C.
Partridge
Sent: 01 January 2020 16:44
To: TekScopes
Subject: [TekScopes] Do we need multiple owners?

Given Dennis' comments about his age, might it be a good idea to add one or
more of our current moderators or members as co-owners?

That way we avoid the problem of "silent key" owner resulting in an orphaned
group.

David


Do we need multiple owners?

 

Given Dennis' comments about his age, might it be a good idea to add one or
more of our current moderators or members as co-owners?

That way we avoid the problem of "silent key" owner resulting in an orphaned
group.

David


Re: My email address was changed by Groups.io my request for contributions

Roy Morgan
 

I have recently gotten set up with Venmo funds transfer system (run by PayPal). It works fast and easy.

Roy sends.
K1LKY

On Jan 1, 2020, at 10:44 AM, Marvin Moss <mmoss@...> wrote:

I sent you money via Paypal but it went to wrong place. So I have to get my money back before I can forward to you. A real mess-up for me. Wish we had better info to get money to you. It is a shame that it is that hard to send you money :-)

-=-=-=-=-=-=-=-=-=-=-=-


Re: TDS694C nvram and tektool

Gudjon Gudjonsson
 

Hi all

Thanks for the answers.

On Tue, Dec 31, 2019 at 1:01 PM John Miles <john@...> wrote:

The TDS 694C's in-house code name is reported to be SCREAMER, but that password didn't work when I tried it, either

Also, there are various structs that appear to be used to access hardware fields at specific offsets, but there is no packing applied. I added #pragma pack (1) just as a guess.
I added pragma pack but it doesn't change the hexdump and it is
consistent with the cmd structures with and without the pragma.

George has the program working on a Win98 machine. I asked him to send
me the the debug (-dd) output and I hope that will solve the problem
or
at least give a hint.

Do I need to flip the nvram protection switch to read the content?

Do you know if the the commands used in the program are documented anywhere?

Regards
Gudjon


Re: My email address was changed by Groups.io my request for contributions

Marvin Moss
 

I sent you money via Paypal but it went to wrong place. So I have to get my money back before I can forward to you. A real mess-up for me. Wish we had better info to get money to you. It is a shame that it is that hard to send you money :-)


Re: MEMBERS PLEASE READ: Our annual Group.io payment is due in 2 weeks.

Daniel Koller
 

Happy New Year Dennis, and thanks for all the work you've done for TekScopes.  I really appreciate the wisdom and help of this group.
I sent $10.   Paypal charges a 5.9% fee if you send to a friend (so the sender pays the fee).  It's only 59 cents for a $10 contribution.   I think we can handle that!!  Please let us know how the fund is going and I hope the contributions continle to flow in.
     Dan

On Monday, December 30, 2019, 10:42:17 PM EST, Dennis Tillman W7PF <@Dennis_Tillman_W7pF> wrote:

Hello everybody,
In a few minutes it will be 2020. This is much further into the future than
I thought I'd ever see. Years ago I was sure someone would have developed a
tiny ultra-thin LED display that can be imbedded into a credit card by 2020.
It would display your current outstanding balance every time the card was
inserted in a reader. If my non-futuristic credit cards only had this
imbedded into them I would certainly not be in my present predicament. I
maxed out both cards and my wife took them away. I found this puzzling
because the cards still look the same even though they don't work anymore.
It is clear to her that she can't afford to keep me. She has made this very
clear to me often in the past 2 weeks.

Since we moved to Groups.io I have been paying the annual fee they charge to
host us. I did this for two reasons:
* It was expedient when we first joined because the demise of Yahoo seemed
imminent and this was the fastest way to get up and running on Groups.io.
* Later when I asked for suggestions on alternate ways to pay for Groups.io
I didn't see anything I liked. I thank you for all of them, they were all
fine. It seemed as if they would create extra work and, more importantly,
consume more of my time (which is in very short supply). I kept each of your
suggestions for future consideration.

In 2 weeks the total amount I will have paid will be $340. This is
significant enough that I have to do something about it, and more
importantly, I need to get back into my wife's good graces. So I am asking
for small contributions via PayPal if possible to be sent to
@Dennis_Tillman_W7pF. If you include a note along with each contribution
saying it is for Groups.io that will make it easier to track. See the
postscript at the end of my post for a no-fee way to send money with PayPal.

If PayPal doesn't work for you my address is 13808 NE 26th Place, Bellevue,
WA 98005 USA. If you have an extremely rare or unusual 7000 series plugin
that is definitely an acceptable form of payment but I must advise you I
probably already have it so contact me first.

I plan to give an accounting of the total to the group once the
contributions stop. Anything over $340 will be set aside. I will find out if
Groups.io will let me pay for the following year (or years) so we don't have
to worry if I get hit by a truck. I will press them hard to let me do this
at the old price of $110/yr.

This is the Groups.io billing summary for TekScopes:
Invoice     Date        Plan        Payment Method
Amount    Paid By   
#3055    01/13/19    Premium    Visa XXXX XXXX XXXX 7319    USD $110
@Dennis_Tillman_W7pF
#814    01/13/18    Premium    Visa XXXX XXXX XXXX 7319    USD $110
@Dennis_Tillman_W7pF
#793    12/13/17    Premium    Visa XXXX XXXX XXXX 7319    USD $10
@Dennis_Tillman_W7pF
The next payment of $110 is due 01/13/2000. NOTE: It appears the annual
price for the Premium Yearly Plan will go up the first of the year to $220.

Dennis Tillman W7PF

P.S. This is a way to send money via PayPal with minimal or no fee:
NO FEE PAYMENT METHOD FOR USA TEKSCOPES MEMBERS
* Choose "Send and Request".
* By default the Send tab will be chosen for you.
* In the "Send Money" field enter @Dennis_Tillman_W7pF.
* Next PayPal will ask you: "Sending to a Friend" or "Paying for an invoice
or service"?
* Choose "Sending to a friend".
* Enter the amount.
* Press next and choose your bank account to avoid the PayPal fee.
* Press the "Send the Money" button.
* Include your email address and TekScopes ID in the Notes section.
MINIMAL FEE PAYMENT FOR FOREIGN TEKSCOPES MEMBERS
* Chose "Send to friends and family internationally".
* Select the country you are sending to (USA).
* To keep the fee to 1% where it says "Select your delivery method" choose
"Send to a PayPal Balance".
* Under "You Send", enter whatever amount in local currency converts to the
correct US currency.
* Press next.
* The email account you will be sending to is @Dennis_Tillman_W7pF.
I can't help you after this point in PayPal because I was not outside the
USA to see what happened next.
* Include your email address and TekScopes ID in the Notes section.



--
Dennis Tillman W7PF
TekScopes Moderator


Re: MEMBERS PLEASE READ: Our annual Group.io payment is due in 2 weeks.

momemeca
 

Hello Dennis,
I have just forward a contribution towards the TekScope Annual Fee hoping that, by now, the funds forwarded by your grateful subscribers will be getting ever closer to the amount required to cover the yearly fee.
I am a long time user and collector of Tektronix (and a few HP) equipment, mostly of the 5xx and 7000 series.
I am from the Mornington Peninsula, near Melbourne, Australia and of the same vintage as my oldest 5xx scopes :-)
I have used Tektronix equipment for most of my university years and professional career.
I recover, restore and collect these beautiful instruments from a bygone era and I am so grateful for the dedication of expert folks like yourself, Chuck and other knowledgeable contributors.
I am aware of another Tektronix admirer and collector, here on the peninsula (my friend Robert F.) who also referred to this extraordinary knowledge base for years.
Please keep up the good work and thank you again from the <<Land Down Under>>.
Happy New Year 2020 to all.

Cheers,

Rick

On 31 Dec 2019, at 14:42, Dennis Tillman W7PF <@Dennis_Tillman_W7pF> wrote:

Hello everybody,
In a few minutes it will be 2020. This is much further into the future than
I thought I'd ever see. Years ago I was sure someone would have developed a
tiny ultra-thin LED display that can be imbedded into a credit card by 2020.
It would display your current outstanding balance every time the card was
inserted in a reader. If my non-futuristic credit cards only had this
imbedded into them I would certainly not be in my present predicament. I
maxed out both cards and my wife took them away. I found this puzzling
because the cards still look the same even though they don't work anymore.
It is clear to her that she can't afford to keep me. She has made this very
clear to me often in the past 2 weeks.

Since we moved to Groups.io I have been paying the annual fee they charge to
host us. I did this for two reasons:
* It was expedient when we first joined because the demise of Yahoo seemed
imminent and this was the fastest way to get up and running on Groups.io.
* Later when I asked for suggestions on alternate ways to pay for Groups.io
I didn't see anything I liked. I thank you for all of them, they were all
fine. It seemed as if they would create extra work and, more importantly,
consume more of my time (which is in very short supply). I kept each of your
suggestions for future consideration.

In 2 weeks the total amount I will have paid will be $340. This is
significant enough that I have to do something about it, and more
importantly, I need to get back into my wife's good graces. So I am asking
for small contributions via PayPal if possible to be sent to
@Dennis_Tillman_W7pF. If you include a note along with each contribution
saying it is for Groups.io that will make it easier to track. See the
postscript at the end of my post for a no-fee way to send money with PayPal.

If PayPal doesn't work for you my address is 13808 NE 26th Place, Bellevue,
WA 98005 USA. If you have an extremely rare or unusual 7000 series plugin
that is definitely an acceptable form of payment but I must advise you I
probably already have it so contact me first.

I plan to give an accounting of the total to the group once the
contributions stop. Anything over $340 will be set aside. I will find out if
Groups.io will let me pay for the following year (or years) so we don't have
to worry if I get hit by a truck. I will press them hard to let me do this
at the old price of $110/yr.

This is the Groups.io billing summary for TekScopes:
Invoice Date Plan Payment Method
Amount Paid By
#3055 01/13/19 Premium Visa XXXX XXXX XXXX 7319 USD $110
@Dennis_Tillman_W7pF
#814 01/13/18 Premium Visa XXXX XXXX XXXX 7319 USD $110
@Dennis_Tillman_W7pF
#793 12/13/17 Premium Visa XXXX XXXX XXXX 7319 USD $10
@Dennis_Tillman_W7pF
The next payment of $110 is due 01/13/2000. NOTE: It appears the annual
price for the Premium Yearly Plan will go up the first of the year to $220.

Dennis Tillman W7PF

P.S. This is a way to send money via PayPal with minimal or no fee:
NO FEE PAYMENT METHOD FOR USA TEKSCOPES MEMBERS
* Choose "Send and Request".
* By default the Send tab will be chosen for you.
* In the "Send Money" field enter @Dennis_Tillman_W7pF.
* Next PayPal will ask you: "Sending to a Friend" or "Paying for an invoice
or service"?
* Choose "Sending to a friend".
* Enter the amount.
* Press next and choose your bank account to avoid the PayPal fee.
* Press the "Send the Money" button.
* Include your email address and TekScopes ID in the Notes section.
MINIMAL FEE PAYMENT FOR FOREIGN TEKSCOPES MEMBERS
* Chose "Send to friends and family internationally".
* Select the country you are sending to (USA).
* To keep the fee to 1% where it says "Select your delivery method" choose
"Send to a PayPal Balance".
* Under "You Send", enter whatever amount in local currency converts to the
correct US currency.
* Press next.
* The email account you will be sending to is @Dennis_Tillman_W7pF.
I can't help you after this point in PayPal because I was not outside the
USA to see what happened next.
* Include your email address and TekScopes ID in the Notes section.



--
Dennis Tillman W7PF
TekScopes Moderator



Re: MEMBERS PLEASE READ: Our annual Group.io payment is due in 2 weeks.

Roland Egli
 

approx 20.00 USD sent - thanks for the great work and the valuable information.

rgds
Roland


Re: TDS3012B NVRAM

amirb
 

I am not sure if resetting it by holding B Trig will recover the up time and number of power cycles. those numbers
must be transferred to the new NVRAM. Isn't there any other information in that NVRAM (except maybe the error log)

I was hoping there is a SCPI command that can write the number of power cycles and up time into the NVRAM

On Tue, Nov 19, 2019 at 04:17 PM, Raymond Domp Frank wrote:


On Tue, Nov 19, 2019 at 09:53 PM, David Kuhn wrote:


You are tight too. That must be a very low
profile socket. I think maybe even more so that my lead carrier pins.
It's an ordinary turned-pin socket, maybe 4 mm (0.16") high and there was
still room for another 4 mm of foam. It is however necessary to remove the I/O
module plastic part before removing or inserting the NVRAM.

Are you sure holding B TRIG in while booting initializes the NVRAM? I'm still
looking at a - 2945263 hours or so total up-time in my error log after
replacing the battery...

Raymond


Re: TDS3012B NVRAM

amirb
 

Hi David,
but what about the data stored in the chip? how did you transferred the original NVRAM content?
I think it has the number of hours and power cycles and also SPC constants in it, right?

Happy New Year to all :o)

On Tue, Nov 19, 2019 at 03:53 PM, David Kuhn wrote:


Ah, I just saw your pics. You are tight too. That must be a very low
profile socket. I think maybe even more so that my lead carrier pins. My
business depends on my original TDS3032. When this chip failed, I ordered
another TDS3032 from Alltest Instruments in NJ (~$1500). While I waited
for it to arrive, I did replace the DRAM in my original. I was way too
stupidly nervous at the time (I had to get back up and running) to dig the
chip out, so I bought a NOS ram. It was okay and worked good. I still use
my original as my primary (it's my baby - lol and seems to work slightly
better than my "new" one). If I have to do it again, I will definitely do
it the way you did!

I did learn that I have to hold the B TRIG in while booting it to initiate
that RAM chip. The screen came up in all kinds of pretty colors without
doing that - lol. Its been good now for about a year and went through
ISO17025 certification well.

Dave

On Tue, Nov 19, 2019 at 3:40 PM Daveyk021 . <daveyk021@...> wrote:

Hello Raymond,

"That is not necessary. I've added a few pictures of the initial
test-setup in my TDS3034 (now TDS3054) to the album "Clock error on
TDS3034", before clean-up. It can be seen that there's ample space for a
normal socket and putting a Li cell on top of the RAM"

With my TDS3032 (no bloody A, or B, or C...), I tried a zero insertion
force socket, and another lower profile version, and neither would fit in
my scope as the I/O module would hit it. I ended up using lead carrier
pins (real old school form the 1980s there, maybe earlier). With lead
carriers, it is just slightly higher (maybe 1/8" - 3/16"), and even then,
on my scope, the chip "just" cleaned the GPIB/VGA/RS232 module. Maybe on
the TDS3034, the chip is in a different location?

Dave

On Tue, Nov 19, 2019 at 1:03 PM Raymond Domp Frank <@Raymond>
wrote:

On Tue, Nov 19, 2019 at 05:00 PM, David Kuhn wrote:


When replacing the chip, install a VERY LOW PROFILE socket (pin
carriers)
on the PCB.
That is not necessary. I've added a few pictures of the initial
test-setup in my TDS3034 (now TDS3054) to the album "Clock error on
TDS3034", before clean-up. It can be seen that there's ample space for a
normal socket and putting a Li cell on top of the RAM

Yesterday, I wrote:

You'll find what you're looking for in my message #157465 in thread
"Clock error on TDS3034", including link to pictures of the Dallas
Module.
Link to the photos:

https://groups.io/g/TekScopes/album?id=91131

Raymond




Re: My email address was changed by Groups.io my request for contributions

Albert Otten
 

There is one more issue Dennis. I use the website. There @Dennis... is a link which points to https://groups.io/profile/Dennis_Tillman_W7PF . This is not your profile at Tekscopes since /g/Tekscopes is missing from the path. I can read your Tekscopes profile, but I get a "404 not found" error on that link.

Albert


Re: MEMBERS PLEASE READ: Our annual Group.io payment is due in 2 weeks.

Vintage Test
 

HAPPY NEW YEAR EVERYONE!

Thanks Dennis, keep up the good work - contribution sent from chilly Scotland!

Cheers,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .


577D1 itching issue - Haven't touched since, currently in storage

DW
 

Some time ago I made a previous post about a 577 D1 with a collector supply issue being partially stuck on despite the variable voltage control parked all the way at the stop. Ever since then I haven't touched that instrument and it is temporarily in storage for a few weeks due to house remodeling.

In AC mode at 6.5V a horizontal line appears 100mV long which cannot be further reduced by the variable collector supply parked at the stop. Raising the collector voltage aggravates the issue in a magnitude that relates to each greater voltage increment I can set. If I short the emitter and base on the fixture the collector supply then goes to 0V.

I find this problem to be only particular in AC, any other setting such as ramped DC or rectified DC the collector goes to 0V or a spot on the display

I checked for any presence of voltage and current on the test fixture at 6.5V AC, I saw about 40mV AC RMS with a voltmeter and about 0.6 mA of current with a 100 ohm resistor shorted across E and C

I tried to park the variac wiper control as far back as I could, improving the 100mV to 10mV big improvement, unfortunately the wiper was off the winding, it would stick, and voltage control was not smooth, the entire wiper has been reset where it is parked entirely over the the beginning of the winding 100mV present again

I tried modifying the brush of the variac wiper to form more of a point instead of the entire area being flat but with no improvement, I was cautioned for doing this so I reformed the brush back to its flat surface. After this point I left the instrument alone and now it has been in storage for about a week, with about 2 more weeks to remain before I can pull it out again

I have been notified of other 577 users who report their collector supply can reach 0V easily (spot on display) at 6.5V which suggests to me I have unique yet minor problem with this instrument. I found the residual voltage seems to originate from the variac after probing it with a voltmeter, wide open it reads 120V and fully off reads about 11V, I will need to recheck this measurement again after I realized I measured to ground and not to neutral from the wiper. No buzzing, burning smells, or visual signs of burning up from the variac. This is weird and I been thinking about it ever since.

Could jumping a clip lead from Neutral to the wiper with the brush insulated from the windings be useful to diagnose why the ollector will not go to 0V or near it? My theory is if this causes the collector to go to 0V or near it then perhaps I have enough resistance occurring from the neutral terminal to the first windings of the variac causing the collector issue I am experiencing, would you agree?

Thanks and happy new year!


Re: MEMBERS PLEASE READ: Our annual Group.io payment is due in 2 weeks.

Morris Odell
 

Thanks Dennis,

I really appreciate this group and I have sent you a contribution from Down Under.

73,
Morris Odell VK3DOC


Difference between Tek 494 and 494A Spectrum Analysers

Gary Robert Bosworth
 

Does anyone know the differences between the Tek 494 and 494A Spectrum
Analysers?

Gary

--
Gary Robert Bosworth
@grbosworth
Tel: 310-317-2247