Vintage Tek Restoration pictures by Martin

[Martin.M]

The cleaning of Tek Covers 

You need:
 A spraybottle windows cleaning fluid (this sort I have tested to be electric neutral),
a old machine brush, very fine, material = "Messing" ( CuZn40 )
2 dry textils, natural baumwolle





Begin: spray enough from the windows cleaning fluid on the dirty cover 



move the brush, circles ...







allover... then remove the dirt with textil No1 and make it dry.



It looks now clean, but like a paint. Begin to polish the dry cover with the second Textil, make that good !

The old Tek begin to be glossy ! 



greetings
Martin

[PaulAm]

I have a Sony/Tek 335, a full function 35 MHz 2 channel delayed sweep scope shrunk down to something you can hold in your hand, and it will run off of 12V.  One of these days I'll post a teardown of it, build quality is awesome.

I have my eyes open for a 213, but am not terribly hopeful of finding one for what I want to spend.

The 5103 D1 and D2 display modules will work in the 577 curve tracer.

I pretty much stick to solid state equipment, although there are a few nuvistors scattered around in there.

I think Martin should get the designation of Tek Museum, European Division 

[Martin.M]

hello Paul,

the last 213 sale I have seen here in germany goes in the bay to a bid of 168€.
My 213 I found it also in ebay, was only 67,-€ but my bid was 333,- to make shure that it will find the way to me and not to another location 
By using a bietomatic, set automatic the bid in the last 3 seconds before ending of the auction, so the others cannot reply.
That little Tek is rare and expensive. All Mini-Tek are expensiv, also today. Collectors want to have them 
When you take a look in the old Tek catalog, the little 213 was new a 1.200 us$ Scope. So the 200,- today may be allready.

greetings
Martin

[Martin.M]

a poor 5403 (the same then 5103 but 60MHz and readout, graticule illum) fallen on the nose?
I found him in the bay "defect"



now..



i tneeds a little trace rotation cal to be finish restored. 

greetings
Martin

[Martin.M]

This is the last true Dual Beam made by Tek. All later scopes are DSO.

7844 is a true Dual Beam with at minimum 4ooMHz bandwith. The acceleration voltage of the CRT is 24kV

My scope have options:
78 = blue beams, P11
21 = the dedicated slots option

his scope mobile is the Type 204. You see there a polaroid camera for 7k also 
This scope was also the most expensive Dual Beam of the complete family.

I have collected some useful (or not  ) plugins for him.
The last I have found was a 7D01 Logic Analyzer with display formatter DF2. The set requires 3 slots.
Actually in restoration, repair is a 7L5 opt.33

[coppice]

That little Tek is rare and expensive. All Mini-Tek are expensive, also today. Collectors want to have them 

Of course. A lot of people want a little electronics nostalgia for themselves, but not everyone has the amount of space you seem to have. 

[Martin.M]

my work room is also very small.

About phosphors.

Tek made self the CRTs, so it was possible to order some sorts of phosphor with various colors and delay time.

The common phosphor of the most oldies is the bluegreen type P2 (see the 555 restoration). The delay time is around a half second.
Later it was changed to the type P31 grass green (see the 5403), it was the same but more resistant for burn in.
Specials: For using the polaroid cameras was the fast blue type P11 the best. You see that here in the subject on my Tek551 and on the 7844.

The most amazing type may be the P7. It is a dual coating with a fast light blue and a very long delaying greenyellow. I have a triple nickel with this dual color outfit, see here 

The point is slowly running, 0,5 sec/div. Tek555, P7 !


greetings
Martin

[Zucca]

Thanks Martin.M this post make me feel so small, there is so much we can learn from the past...

[Martin.M]

What is the system on the far left center?

Looks like a Rhode & Schwarz Polyscope III
http://abload.de/img/010h8kvk.jpg
www.classicbroadcast.de/downloads/rohde_SWOB3.pdf

Has a frequency sweep generator inside and plots frequency vs amplitude of DUT (amplifier, filter etc)
But what is that strange connector on the bottom??

Thanks for the links.   Looks like the same system.   I like it.   

That is a R+S Polyskop III SWOB, yes 

this one is full extendet, there are 12 oscillators in the bank. Each of them is build with a very fine sweep controlled Low pass filter to provide a clean wave without any harmonics and with a constant amplitude.
There is a crystal controlled marker generator also.
The monitor top have slots and provides simultan 4 channels. In my SWOB are plugins:

HF-Input (with Dezifix),
Lin/Log with HF-Input, Dezifix (requires 2 slots and 2 channels)
DC-Input by BNC, very sensitive for Demodulator probes.

The oscillator collection provides sweeping in 12 areas between low f and 1,25GHz. That fat SWOB can check all kind of HF-parts, I like to use it for LC testing, adjust for resonance and bandwith.

[coppice]

About phosphors.

Tek made self the CRTs, so it was possible to order some sorts of phosphor with various colors and delay time.

The common phosphor of the most oldies is the bluegreen type P2 (see the 555 restoration). The delay time is around a half second.
Later it was changed to the type P31 grass green (see the 5403), it was the same but more resistant for burn in.
Specials: For using the polaroid cameras was the fast blue type P11 the best. You see that here in the subject on my Tek551 and on the 7844.

The most amazing type may be the P7. It is a dual coating with a fast light blue and a very long delaying greenyellow. I have a triple nickel with this dual color outfit, see here 

I'd never thought about this before. Lots of people offered a really slow orange phosphor option for their scopes, but I don't remember ever seeing a Tek branded scope with such a tube. I think I saw Telequipment branded scopes with orange faces, but I think most Telequipment branded models used commercially available British tubes (e.g. Brimar ones).

[Martin.M]

Thanks Martin.M this post make me feel so small, there is so much we can learn from the past...

thank you much ,

if you are interested, or you want to learn or repair an Tek Oldie, simply use my homepage and register there in the little FORUM.
There ist the headquarter of the german Tek-Oldies friends (a lot of english there, the world have found us).


At next I want to write some about Hardcore Restoration

greetings
Martin

[Martin.M]

A friend sent me message that he have a Tek there, 515A , defect, not possible to repair, and missing the complete case.
If I want that for parts, to pay only the postage.

done 

The old Tek arrived, it was true.





after looking the disaster I made decision to make a Restoration 

[Martin.M]

Tek 515A, Hardcore Restoration.

1. cleaning inside (there is no outside...

you know that, washing, drying....


2. electronic repair.

Tubes was complete but I found a defect double triode and some interrupted cables from bad handling without case.
Also was some replacement of cermaic C in the high voltage area required, following tests and recalibration



a time later "for parts" waked up. 

3. Removing the PC-fan I found there and do a replacement with a original Tek fan.
Rebuilding of the complete cover including the filter frame...

In my collection is a second 515A, this I used for measuring and planing the rebuild parts for my "for parts".

Rebuilding of the filter frame, from Aluminium sheet 1.5mm. cutting, folding, forming corners, welding the cut, make that straight at the corners with sandpaper









drawing the Covers in CAD, convert this to CNC data and cutt the sheets on a nibble mashine at my work.
Then i foldet them on the press brake exacty, the large corner is a half inch. There was no tool in this size, so i used a selfmade.

done  the new covers of "for parts"



following the test if the new jacket will pass?



looks good, "for parts" is now a Tek515A.

Then I have sent the covers and the filter frame to a  burn pinter company to make that Tek blue.
They was blind in colors, wrong blue... but OK, this is so or so a very special Tek...

no Tek blue


  my 515A


greetings
Martin

[tautech]

a poor 5403 (the same then 5103 but 60MHz and readout, graticule illum) fallen on the nose?
I found him in the bay "defect"

I can plainly see the Telequipment heritage on your 5403.
It's form is very similar to the D83, large CRT, mainframe controls at top right, plugins.

I'd go as far to say it's a Telequipment with Tek badging.

[Martin.M]

I am not shure but thinking Tek made not self the display part of the 5k series.
This scopes was a low cost series.

greetings
Martin

[robrenz]

Very nice metal work there Martin 

[Howardlong]

Right, that's it, the wife's just walked out on me.

[tautech]

Right, that's it, the wife's just walked out on me.

More room for vintage scopes. 

[T3sl4co1l]

Who needs a wife when your scope is hot and heavy like this?

Tim

[Howardlong]

Right, that's it, the wife's just walked out on me.

More room for vintage scopes. 

Thanks mate, I knew there'd be a silver lining!

[TerraHertz]

The cleaning of Tek Covers 

You need:
 A spraybottle windows cleaning fluid (this sort I have tested to be electric neutral),
a old machine brush, very fine, material = "Messing" ( CuZn40 )
2 dry textils, natural baumwolle

Hey, almost exactly the same as I use for HP & Tek crinkle-finish cases. Except I use a slightly coarser brass wire brush.

But what I want to know, is any method to clean in tangles of delicate components? Other than just slogging away with little bits of cloth held in fine forceps?  Which I find exceeds my patience, so generally I just use a compressed air gun and overall brushing with a small paintbrush, dry.
Perhaps something like a miniature powered rotating feather duster might be good, but I didn't get around to improvising something like that yet.

Your metal working is giving me a lot of envy.  Slightly less burn after seeing that you got the top edge fold position a bit wrong on that 'broken scope' rebuild. Folded AFTER CNC punching all those little holes, and no way back. I bet that pissed you off. I though that was the kind of goof only I make, in my totally amateur metalworking efforts. Makes me feel better to see a professional do it too.

Edit to add:

if you are interested, or you want to learn or repair an Tek Oldie, simply use my homepage and register there in the little FORUM.
There ist the headquarter of the german Tek-Oldies friends (a lot of english there, the world have found us).

Ah! You didn't mention that before, or I missed it. Where your pics are hosted.  http://www.wellenkino.de/  Nice site!

[joeqsmith]

What is the system on the far left center?

Looks like a Rhode & Schwarz Polyscope III
http://abload.de/img/010h8kvk.jpg
www.classicbroadcast.de/downloads/rohde_SWOB3.pdf

Has a frequency sweep generator inside and plots frequency vs amplitude of DUT (amplifier, filter etc)
But what is that strange connector on the bottom??

Thanks for the links.   Looks like the same system.   I like it.   

That is a R+S Polyskop III SWOB, yes 

this one is full extendet, there are 12 oscillators in the bank. Each of them is build with a very fine sweep controlled Low pass filter to provide a clean wave without any harmonics and with a constant amplitude.
There is a crystal controlled marker generator also.
The monitor top have slots and provides simultan 4 channels. In my SWOB are plugins:

   

Would like to see this thing in operation.   Vintage high tech!

[coppice]

a poor 5403 (the same then 5103 but 60MHz and readout, graticule illum) fallen on the nose?
I found him in the bay "defect"

I can plainly see the Telequipment heritage on your 5403.
It's form is very similar to the D83, large CRT, mainframe controls at top right, plugins.

I'd go as far to say it's a Telequipment with Tek badging.

I thought it was the other way around. A few Telequipment scopes, like the D83, looked like a Tektronix scope had been rebadged. The real Telequipment scopes had a completely different style, mostly with wide horizontal plugins.

Tektronix had a lot of duplication of effort in low end scopes, with the US company making products that targeted exactly the same segment as completely different designs from Telequipment in England. For example, the US designed (and probably Channel Islands built) T900 series was sold in mainland Europe, while completely different Telequipment models (made in England) were sold into the same applications in a number of other countries. They did eventually sell the T900 series in Britain, but the only interesting model was the T912 - a (relatively) low cost storage scope.

[Martin.M]

The cleaning of Tek Covers 

You need:
 A spraybottle windows cleaning fluid (this sort I have tested to be electric neutral),
a old machine brush, very fine, material = "Messing" ( CuZn40 )
2 dry textils, natural baumwolle

Hey, almost exactly the same as I use for HP & Tek crinkle-finish cases. Except I use a slightly coarser brass wire brush.

But what I want to know, is any method to clean in tangles of delicate components? Other than just slogging away with little bits of cloth held in fine forceps?  Which I find exceeds my patience, so generally I just use a compressed air gun and overall brushing with a small paintbrush, dry.
Perhaps something like a miniature powered rotating feather duster might be good, but I didn't get around to improvising something like that yet.

You must look at first what parts are water-sensitive, and cover them with a plastic foil.

At first use the air pressure, yes. The best place ist outside, so the dust will not go in the work room.
Then put it inside on the table.

* a very good light is important ! You can only make a good job when you see all
* the spry bottle with the windows cleaner again
* a second, but Aqua dest, to remove rests from the windows cleaner
* again the air pressure
* ear cleaning sticks a pack, some little textils, paintbrushes, like that ..

* a lot of time.



the high voltage transformer is a very sensitive part, strictly forbidden to spray that with cleaning fluid or water ...



..

[tautech]

a poor 5403 (the same then 5103 but 60MHz and readout, graticule illum) fallen on the nose?
I found him in the bay "defect"

I can plainly see the Telequipment heritage on your 5403.
It's form is very similar to the D83, large CRT, mainframe controls at top right, plugins.

I'd go as far to say it's a Telequipment with Tek badging.

I thought it was the other way around. A few Telequipment scopes, like the D83, looked like a Tektronix scope had been rebadged. The real Telequipment scopes had a completely different style, mostly with wide horizontal plugins.

I've been wondering that all day, and you could well be correct.
Yes the D83 was somewhat different to other Telequipment models and might be Tek influenced.
Shame that history is not on the net.