Date   

Re: TDS3000B Dallas chip

Tom B
 

Thank you.  That is much easier to deal with than a full calibration.

Tom

On 2/9/2020 8:53 PM, amirb wrote:
based on information that I have gathered before, it holds time and date, runs the clock, holds the error log, number of hours and number of power on cycles
SPC cal constants (not "THE" cal constants, these can be restored by running SPC) and instrument settings/setups


Re: TDS3000B Dallas chip

amirb
 

based on information that I have gathered before, it holds time and date, runs the clock, holds the error log, number of hours and number of power on cycles
SPC cal constants (not "THE" cal constants, these can be restored by running SPC) and instrument settings/setups


Re: TM500/TM5000 extender project

John Griessen
 

On 2/9/20 6:40 PM, Ke-Fong Lin wrote:
Hardest part was to draw the PCB edge connector footprint into kicad. The polarity cut-off was particularly tedious.
However, python scripts can also be used to generate footprints,
If you write scripts, pcb-rnd would maybe be a better way for you to spend time -- it's aimed at
engineers that use linux/unix to create circuits, circuit models, documentation, as chip designers do,
but mainly for boards. (At least until 3D printed organic transistor resistor capacitor inductor circuits are easy to specify and buy).


TM500/TM5000 extender project

Ke-Fong Lin
 

Hi everyone,

I've made some progress for the TM500/TM5000 project:

https://drive.google.com/file/d/14WSoPeQoIwup4532_YnxUz44PVxAYJ8T/view
https://drive.google.com/file/d/1E7RxXXPg_3-Kwd652mFbe5g-4zoBeAN_/view

The purely "extender" part is done, that is the PCB edge connector plus solder pads to connect.
Left to do, is the debugging part: PWR power-good signal for TM5000 (only 1 transistor and a few resistors) and final layout of the PCB.
Basically, everything on the right of the solder pads.
The big cutoff in the PCB is intended to act like a handle, much as what cyrob (Philippe Demerliac) has done for his TM500 projects.

Hardest part was to draw the PCB edge connector footprint into kicad. The polarity cut-off was particularly tedious.
However, python scripts can also be used to generate footprints, that's what I did for the solder pads. It is easy, fast and above all precise.
With the experience gained here, a 7000 series plug-in extender would be an easy addition.

Note that only the "mandatory" cut-off is here, not the function specific ones.
To be honest, it is particularly tedious to enter the coordinates manually. Yet it would be possible to write a python script to do so.
With so many cutoffs, as in Tek's "official" extender, I'm worried that the edge connector would be fragile.
Also, it would be only a minor inconvenience to not support the function specific cutoffs.
So I decided to have only the one cutoff absolutely needed.

The connectors are Molex KK 2.54mm series. I had good results with them in previous DIY projects.
They are readily available at mouser or farnell, and not expensive. Only drawback is they need a crimping tool for wires.

I've done a quick quote with this work in progress. JLPCB has it at around 22 euros for 5 pieces and 5 euros shipping.
Gold plated edge connectors + chamfer included.

I plan to have it everything ready for next sunday for a first try.
And put everything on github when done.

Best regards,


Re: Installing CRT into Tektronix 531A

Leon Robinson
 

Brenda
Try a few wraps of felt.

Leon Robinson    K5JLR

Political Correctness is a Political Disease.

Politicians and Diapers should be changed
often and for the same reasons.

On Sunday, February 9, 2020, 3:40:53 PM CST, Brenda via Groups.Io <brendda75=yahoo.com@groups.io> wrote:

Hello everyone,

I apologize if I am making too many posts, I figured that this would fall into a new topic. Anyways, since I was able to remove the CRT from the trashed 533A, I am ready to install the CRT into my 531A, however, I have run into a problem that I am hoping that someone on here will have a simple solution.  When I removed the remains of the shattered CRT from the 531A, the rubber or nylon ring that was around the CRT socket has totally fell apart.  Is there anything that I could use that would be a proper thickness to secure the end of the CRT? The one on the trashed 533A is still good, but I want to save that one for the other 533A that will be a long process.

Brenda


Re: Installing CRT into Tektronix 531A

Chuck Harris
 

Nylon gets brittle as it loses its water content with age, and
especially from being in a dry environment, like the neck of a
CRT.

If you do decide to use the unbroken ring, soak it in a vinegar
and water solution for overnight first.

I have made replacements for some CRT neck rings out of PVC tubing
available from the bigbox stores. Sometimes it has to be split
down the side to make it work. I don't know if it will work in
this situation.

-Chuck Harris

Brenda via Groups.Io wrote:

Hello everyone,

I apologize if I am making too many posts, I figured that this would fall into a new topic. Anyways, since I was able to remove the CRT from the trashed 533A, I am ready to install the CRT into my 531A, however, I have run into a problem that I am hoping that someone on here will have a simple solution. When I removed the remains of the shattered CRT from the 531A, the rubber or nylon ring that was around the CRT socket has totally fell apart. Is there anything that I could use that would be a proper thickness to secure the end of the CRT? The one on the trashed 533A is still good, but I want to save that one for the other 533A that will be a long process.

Brenda




TDS3000B Dallas chip

Tom B
 

Hello All,

The TDS3012B that I have uses a Dallas DS1742W-120 timekeeper. Is this all this chip does is keep the RTC running or does it also hold cal constants?

Tom Bryan


Installing CRT into Tektronix 531A

Brenda
 

Hello everyone,

I apologize if I am making too many posts, I figured that this would fall into a new topic. Anyways, since I was able to remove the CRT from the trashed 533A, I am ready to install the CRT into my 531A, however, I have run into a problem that I am hoping that someone on here will have a simple solution. When I removed the remains of the shattered CRT from the 531A, the rubber or nylon ring that was around the CRT socket has totally fell apart. Is there anything that I could use that would be a proper thickness to secure the end of the CRT? The one on the trashed 533A is still good, but I want to save that one for the other 533A that will be a long process.

Brenda


Re: Tektronix 533A CRT

Brenda
 

Oh I did not waste any time in getting that CRT out of the trashed scope once I got that stubborn lead off. I put the CRT on my workbench on top of bubble wrap and I cleaned the neck area thoroughly with Fantastik and cleaned everything up. Other than a very small burn spot on the side of the CRT, I have a feeling that this CRT is healthy. The getters are very dark and shiny, and when I wiped the rest of the CRT down, there was very little black dust. So on that note, I am keeping my fingers crossed!

Brenda


Re: Tektronix 533A CRT

greenboxmaven
 

That's great news. I hope the CRT is in good shape and works well. It is important to clean the WD-40 off the pins with a solvent, however. Within a short time it will create a residue that is difficult to remove. WD-40 is fine as part of a cleaning process, but it must be flushed away once it has done it's work. Best wishes for continued success in the restoration.

Bruce Gentry KA2IVY

On 2/8/20 11:03 PM, Brenda via Groups.Io wrote:
I just wanted to update everyone, and a shout out to Bruce, I tried the WD-40, and it worked like a miracle! I let the WD-40 set for about 30 minutes and the last lead that was stubborn came off with very little effort. The WD-40 cleaned all the neck pins and now all the pins are nice and shiny. Thanks Bruce!

Brenda



Re: Tektronix 533A CRT

Brenda
 

I just wanted to update everyone, and a shout out to Bruce, I tried the WD-40, and it worked like a miracle! I let the WD-40 set for about 30 minutes and the last lead that was stubborn came off with very little effort. The WD-40 cleaned all the neck pins and now all the pins are nice and shiny. Thanks Bruce!

Brenda


Re: Tektronix 533A CRT

Brenda
 

Thank you Bruce! I was thinking of trying some WD-40 on it, but was worried that it may damage the CRT. But if you are suggesting that tells me that I am being too much of a worry wort! And what you are saying about the danger makes total sense. I just hear about the horror stories about these CRT's really going with a bang, as I am sure that the 531A that I got from eBay went. There was hardly any glass left of the CRT, all just really small pieces other than for the neck. To be honest, I do worry about handling CRT's, just need to be safe, smart and really pay attention to what I am doing. The 533A that I am trying to salvage the CRT, has been stripped of anything copper along with the audiophool tubes.

I am going to take your advice, I am just going to put a small dab of WD-40 on that pin, let it sit for a bit to work and then really gently turn it and work it off. I just want to be careful with this CRT as I really want to bring my 531A back to life. Now, getting all the really small pieces of broken glass out that the shop vac won't get will be the fun part!

Brenda


Re: For Sale in Montreal, Canada

 

Hi Richard,
I desperately need a 7CT1N.
Please contact me off list at dennis at ridesoft dot com to discuss the price.
Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Richard Katezansky
Sent: Saturday, February 08, 2020 10:43 AM
To: TekScopes@groups.io
Subject: [TekScopes] For Sale in Montreal, Canada

I have the following items no set price just make an offer.
There is some HP available but it has been posted to that group

Tek 7L18 + Manual, working but probably needs some TLC (caps ect.) 7/10 Tek 7L5 no tracking generator + Manual, working 7/10 Tek 7603 mainframe + manual working. 7/10 Tek scopemobile cart. I think a 203, it's too narrow for a 4 bay frame. 7/10 Tek 7603R mainframe working but rough. 5/10 Tek 7704 mainframe + manual, working current cal loop is broken but I have a new one, P11 (bright blue phosphor) 6-7/10
7A18
7A26
7A22
7B53A
7CT1N
7D13
I have manuals for all of the above plug-ins.
Tek Single bay 7000 series plug-in extension test cable/fixture, 2 pieces.

Pick-up preferred but I'm open to shipping. PM to discuss.

Richard





--
Dennis Tillman W7PF
TekScopes Moderator


Re: Tektronix 533A CRT

greenboxmaven
 

The leads take a small tug to come off. The clip is probably corrosion bonded to the pin. The most important thing is to never put any sideways force on them, it can crack the seals. Put a little pentrating oil on the clip and pin, and turn it back and forth gently until it comes loose. It may not move at first, just try to turn it each way until it frees up. Don't pull until it is free to turn a bit. As for the tube, it takes a lot more force than many think to cause the neck of a smaller CRT to implode. The dangerous jugs are old B&W television tubes, especially those over 15 inches. The greater danger is cracking the seal and letting air in. I have smashed many bad CRTs over the years, it's illegal here to put them in the trash intact. Scope tubes of 5 inches or less are not very powerful. 7 inch electrostatic jugs from scopes and TVs are far more dangerous, they are thin walled and really go off. It is smart to wear safety glasses when handling or putting a strain on scope tubes.

Bruce Gentry, KA2IVY

On 2/8/20 4:01 PM, Brenda via Groups.Io wrote:
Hello again everyone,

I was able to get a hold of a 533A that is in bad shape, but I am hoping that the CRT will be good enough that I can use in my 531A. However, in trying to remove the CRT, there is 1 lead that is literally stuck to the CRT neck pin. I didn't go yanking on it, but wanted to know if it does take some force to remove these neck leads. Does it usually take a lot of force to cause a CRT implosion if one has to pull on the wire pretty hard? I am only asking for my safety and the safety of the CRT as I don't want to trash it. Or are there any tricks that I can use to make it easier to remove like a chemical to reduce the corrosion if any?

Brenda





Tektronix 533A CRT

Brenda
 

Hello again everyone,

I was able to get a hold of a 533A that is in bad shape, but I am hoping that the CRT will be good enough that I can use in my 531A. However, in trying to remove the CRT, there is 1 lead that is literally stuck to the CRT neck pin. I didn't go yanking on it, but wanted to know if it does take some force to remove these neck leads. Does it usually take a lot of force to cause a CRT implosion if one has to pull on the wire pretty hard? I am only asking for my safety and the safety of the CRT as I don't want to trash it. Or are there any tricks that I can use to make it easier to remove like a chemical to reduce the corrosion if any?

Brenda


Re: Anyone needing parts from Tektronix 310A, 531A or 533A scopes?

Brenda
 

Hello and thank you for the interest. I was a bit frustrated when I posted this and I do apologize. I think I will hold onto them for now since I know that I will really regret it if I parted them out. I just need to be patient and give it time.

Brenda


Re: For Sale in Montreal, Canada

Ke-Fong Lin
 

Hi Richard,

I would be simple if you just send the price list along.
Thank you.

Best regards,


For Sale in Montreal, Canada

Richard Katezansky
 

I have the following items no set price just make an offer.
There is some HP available but it has been posted to that group

Tek 7L18 + Manual, working but probably needs some TLC (caps ect.) 7/10
Tek 7L5 no tracking generator + Manual, working 7/10
Tek 7603 mainframe + manual working. 7/10
Tek scopemobile cart. I think a 203, it's too narrow for a 4 bay frame. 7/10
Tek 7603R mainframe working but rough. 5/10
Tek 7704 mainframe + manual, working current cal loop is broken but I have a new one, P11 (bright blue phosphor) 6-7/10
7A18
7A26
7A22
7B53A
7CT1N
7D13
I have manuals for all of the above plug-ins.
Tek Single bay 7000 series plug-in extension test cable/fixture, 2 pieces.

Pick-up preferred but I'm open to shipping. PM to discuss.

Richard


Re: Anyone needing parts from Tektronix 310A, 531A or 533A scopes?

Phil Cirocco
 

HI Brenda,
I am desperately looking for a graticule for a 310 or a 360 scope. The transparent insert with the grid lines in front of the CRT. It should easily be removable from the front with no dis-assembly. Please let me know one way or the other. I will gladly pay for it and/or shipping.

Phil Cirocco
Discrete Synthesizers


Re: WTF: TDS3000 Blank option modules.

Ken Eckert
 

Ebay, $10-20ish

On Saturday, February 8, 2020, Oz-in-DFW <lists@...> wrote:

Want to find - expected these might be a service part in stock somewhere.
Want to fill an empty hole.