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Re: Printing Tek knobs

A Rhodes
 

Actually a single URL for all the TEK STL files in the world is not an impossible task depending on copyright.

But those with open copyrights COULD be collected and placed in a single location as they get found by people.

Probably best to have both a link to the original source AND the STL file itself. Links tend to disappear over time but designs also tend to be updated over time. So having both recorded is probably the best way to preserve the info as best as possible.

For those more restrictive copyrights, maybe keeping a copy of the file is impossible, then only the link would be recorded.


Re: Preparing to rebuild a Tek 2445 Power Supply - Any Advice?

Chuck Harris <cfharris@...>
 

2445 and 2465 are quite a bit different than the 2465A...
particularly in the controller department.

No battery, but rather an EAROM. No muffin fan, but rather
a siemens motor with a squirrel cage fan.

-Chuck Harris

Ancel wrote:

Hmm, well the 2465s I have had a battery backup that I upgraded after doing the PSU recapping and fan lubrication as well as a custom heatsink for the U800 display driver.
Here's some pics etc.
https://hackaday.io/project/163890-tektronix-2465-series-servicing




Re: Printing Tek knobs

John Griessen
 

On 7/5/19 8:26 PM, Paul Amaranth wrote:
It would be nice to actually have a single point resource on this.
I think tekwiki is a great place for STL versions of Tek knobs...
but a single URL for Tek knobs in all the world? May not happen...


Re: Printing Tek knobs

Scott Scheirman
 

Does anyone have STL files for Tek Knobs?
www.thingverse.com <http://www.thingverse.com/> has STL files for ~50 Tektronix items (maybe more, I just searched for Tektronix.

I hope it helps.

Scott


Re: Preparing to rebuild a Tek 2445 Power Supply - Any Advice?

 

Hmm, well the 2465s I have had a battery backup that I upgraded after doing the PSU recapping and fan lubrication as well as a custom heatsink for the U800 display driver.
Here's some pics etc.
https://hackaday.io/project/163890-tektronix-2465-series-servicing


Re: Printing Tek knobs

Paul Amaranth
 

There's a six page thread on eevblog on this; there are a few stl files
referenced throughout the thread.

https://www.eevblog.com/forum/testgear/replacement-knobs-feet-and-fittings-for-test-equipment/

It would be nice to actually have a single point resource on this.

Paul

On Fri, Jul 05, 2019 at 04:27:33PM -0700, EJP wrote:
I'm thinking maybe we should start a folder system here for STL files. I have a couple.

EJP





!DSPAM:5d1fdcef45782901930394!
--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@AuroraGrp.Com | Unix & Windows


Re: Printing Tek knobs

Mlynch001
 

Like many, I am very interested in 3D printing knobs for my TEKTRONIX equipment. I have extensive experience with a 3D printer and would like to see the STL files and attempt a print.

--
Michael Lynch
Dardanelle, AR


Re: Printing Tek knobs

David Slipper
 

Since I have seen a fair bit of Tek stuff on youknowwhobay with
missing/broken knobs it would be a very good idea given the availability
of 3d printers and printing "hubs".

Buying a "for parts" unit as a donor for a couple of knobs seems a bit
of an overkill.

I need a couple of knobs for my 2225 - I can probably design them for 3d
printing, but it would save a lot of time if they already exist.

The only problem would be colour matching - but spraying/painting should
be relatively easy.

Dave

On 06/07/2019 00:27, EJP wrote:
I'm thinking maybe we should start a folder system here for STL files. I have a couple.

EJP



.


Re: Printing Tek knobs

EJP
 

I'm thinking maybe we should start a folder system here for STL files. I have a couple.

EJP


Re: Printing Tek knobs

G Hopper
 

I'd be interested in this too. I'd appreciate an off-list reply hearing
about suggested groups or forums for 3D printing.

Never thought about printing them myself until now!

Great topic!

Grant

On Fri, Jul 5, 2019 at 12:52 PM David Slipper <softfoot@hotmail.com> wrote:

Hi, I too would like to print Tek knobs.

You mentioned other printing forums - I'd be very interested in joining
those - perhaps you could let me have the names or URLs ?
Off-list would probably be best to avoid swamping this topic.

Best regards,
David


On 05/07/2019 18:31, Robert Simpson via Groups.Io wrote:
Does anyone have STL files for Tek Knobs? I was given a small 3D
printer. This is my first 3D printer. It works easily, but I see that
designing the object is the challenge. Note: please keep this thread about
Tek knobs or other Tek plastic parts, as printer conversations can be done
in other forums.
Bob



.



Re: Printing Tek knobs

Dan Cordova <danny_cordov@...>
 

Which knobs specifically are you wanting to print?

I'm on vacation until July 22nd and can send stl files when I get back home. Send an email if you haven't gotten any files by then.


Re: Printing Tek knobs

David Slipper
 

Hi, I too would like to print Tek knobs.

You mentioned other printing forums - I'd be very interested in joining
those - perhaps you could let me have the names or URLs ?
Off-list would probably be best to avoid swamping this topic.

Best regards,
David

On 05/07/2019 18:31, Robert Simpson via Groups.Io wrote:
Does anyone have STL files for Tek Knobs? I was given a small 3D printer. This is my first 3D printer. It works easily, but I see that designing the object is the challenge. Note: please keep this thread about Tek knobs or other Tek plastic parts, as printer conversations can be done in other forums.
Bob



.


Printing Tek knobs

Robert Simpson
 

Does anyone have STL files for Tek Knobs? I was given a small 3D printer. This is my first 3D printer. It works easily, but I see that designing the object is the challenge. Note: please keep this thread about Tek knobs or other Tek plastic parts, as printer conversations can be done in other forums.
Bob


Re: GPIB using Win98 and a NI GPIB-PCII/IIA ISA card to talk to my TDS540B?

Steve Hendrix
 

P.S. If you're interested in KISS-488 please email me directly off-list at SteveHx@HxEngineering.com. I can send documentation directly without cluttering up the list or trying to go thru eBay.


Re: 7904 excessive shadow/flare

Albert Otten
 

Hi John,

If there is effect of the beam current on the bouncing back electrons then the effect would increase when intensity (so beam current and the B field) is cranked up. I didn't notice this.
I also played with Trace Rotation. Trace rotation did nothing special; the primary spot and image stay in line. Probably the field of the trace rotation coil is to weak in the region where bounced back electrons fly.

[I can't attribute to the discussion until after the weekend.]
Albert

On Thu, Jul 4, 2019 at 04:42 PM, John Griessen wrote:


There is going to be some magnetic field action. We have a strong current of
e- going straight down the tube perpendicular to the phosphor. When an e- does
a bounce, it is going in a partly outward direction, but the
rest of the e- beam is going straight, and making a current surrounding
magnetic field that is unaffected by the
odd bouncing electrons.

The strong main B field is circles around the impact spot since it is caused
by the e- beam, and the direction
will be counterclockwise looking at the phosphor surface from inside the tube.

If an electron is bouncing back off perpendicular, its outward velocity will
interact with the B field and it will feel a force. the force will be
perpendicular to velocity X B, (thumb of right hand rule), so while bouncing
outward and upward, (v X B) points down and out, and as that makes it go more
outward the effect is more downward, but getting weaker with distance. The
weakening with distance could mean that as e- falls it is just
mostly newton mechanics trajectory, and it is curve more only close in.


Re: Preparing to rebuild a Tek 2445 Power Supply - Any Advice?

Bru H
 

Thank you for all of the Help!


Re: Preparing to rebuild a Tek 2445 Power Supply - Any Advice?

Bru H
 

I went through the Diagnostic Routines and came up with the following tests:
(Note that some of the tests pertain to the TV Option
All 00 - PASS
TEST 01 - PASS
TEST 02 - PASS
TEST 03 - PASS
TEST 04 - PASS
TEST 05 - PASS
BU TEST F1 - PASS
EXER 01 - 00 C1 00 C1
EXER 02 - 00 2048
EXER 03 - no code generated
EXER 04 - 417B 1997 07 8000
TV EXER 61 - LINE 1 COINCIDENT WITH FLD SYNC & LINE 1 OCCURS PRIOR TO FLD SYNC
(in the above I get the two statements by pushing the COUPLING switch up)

TV EXER 62 - LINE NO RESETS ON FLD1 ONLY & LINE NO RESETS ON EACH FLD
(in the above I get the two statements by pushing the COUPLING switch up)

BU EXER F1 - TV BU
BU EXER F2 - no code generated

It will be interesting to see if these codes change with the PS Rebuild. At least I have the data.


Re: Preparing to rebuild a Tek 2445 Power Supply - Any Advice?

Bru H
 

Great advice on the lubrication.
Yes, the Fan is really delicate and I do not look forward to the removal procedure!


Re: Preparing to rebuild a Tek 2445 Power Supply - Any Advice?

Chuck Harris <cfharris@...>
 

You won't break the collet if you don't turn the slotted
screw! The slot is there so you can loosen the nut without
turning the slotted screw (and breaking the collet).

Simply put a screwdriver in the slot, using an open end wrench,
loosen the nut until it is flush with the slot, and give the
nut a tap, while holding the fan impeller. The collet will
instantly release... remove the nut, and pull the collet (still
on the shaft) out of the impeller, and once you have done that,
use the screwdriver, if necessary, to pry the collet off of
the shaft. Prying is usually not necessary.

-Chuck Harris

Bob Koller via Groups.Io wrote:

There is no battery on the 2445, it has an EAROM chip instead.

The fan motor can be lubricated after removal from the PCB, by placing a drop of oil or two on the shaft, and allowing it to stand vertical overnight. Also, on the terminal end, in the center there is a small screw that adjusts the armature end play. You dig out the sealant, remove the screw, and again a drop or two of oil, and vertical storage to allow the oil to creep into the bearing. Replace the screw, and carefully adjust for a little end play of the armature.

It is almost certain that in removal of the fan impeller the collet will break. This is a constant problem with Siemens fan units. There are several ways to fix it. A search of the Forum should provide insight.

No worry about loss of the cal with any of this. No easy way to save the constants, don't worry, you don't need to.

Good Luck!




Re: 152-0107-00 diode equivalent

A R
 

It is the diode that connects to the 120v unreg to produce the 110v reg supply. Can replace it with a 1N4004 which is 400v 1A?

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