Date   

Re: My first scope, a Tektronix 11401 with option 2D extended memory and two 11A34 plugins and an 11A33 plugin.

Precaud
 

It takes a brave person to admit to liking and using an 11k-series scope :)

I have a couple and "like" them in remote-controlled applications, but hands-on operation is a different matter. The digitizer is excellent (if you need 10 bits), I love the large display, and the 11k preamps are superb. I think the entire user interface was designed with remote programming in mind. Even after years of occasional use I can't remember how to do some basic, simple stuff from the front panel. Because of this, it has earned a spot on the floor next to the bench, deployed only when needed.


How To Select An Oscilloscope

Carl Moon <carl.moon@...>
 

Here’s a quick review of what’s important to know about the wide assortment of scopes and scope features available today.

https://prezhost.com/2020/06/25/how-to-select-an-oscilloscope/


tektronix 2465b rom.

James Theonas
 

Hi guys! I opened exerciser 2 on my scope and copied all the data from 00 to ff by looping through all of them as I was recording a video. If I input the said data in my programmer and flash a new chip will it work? Is that all that is needed?

Thanks everyone for the fantastic people in this group!


Re: Tektronix Blue paint - source in the UK ??

Colin Herbert
 

There has been communication on Tek blue paint ever since I joined this Forum. May I respectfully suggest that you have a search through the past posts to find all you can. There is a lot of information there, though a good deal relates to US providers, I am sure that some UK-dwelling members have contributed.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of chris gare
Sent: 10 July 2020 11:41
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix Blue paint - source in the UK ??

I'm from the UK and don't quite understand the "Bluebase 79126" reference? The the other colors are fine as they are in Ounces?

Help please anyone!

Chris


Re: R7704+7A18+7B53A in Newport Beach, CA to part with

ChrisBeee
 

Hi Dave,
Abc Xyz did not report back so far, so the scope can be yours. I will send you a PM to clarify details.
Chris

@Abc Xyz: Sorry, but even in 'modern' times where salutations and signatures in messages mainly have become outdated and obsoleted, I am expecting at least a minimum of etiquette. Especially when I offer something to part with where the receiver can set the price. There is no free lunch.


Re: Tek 465 Turns on, No Dot, No Trace

Stephen
 

I notice something I didn’t pay attention to before. That is TP1486 should go from 15V to 75V depending on the position of the Intensity control knob. However, mine goes from 15V to only 31V with the intensity maxed out...
Hmmmmm.... Interesting... There is definitely something there as well.

PS: Where do I lift the HV multiplier lug?


Most scarce Modules (TM500/5000, 7000) and Calibration Fixtures/Service Aids seen in the past.

Egge Siert
 

Hi to All,

Inspired by the 7J20 and J20 scarcity remarks.There are other items. Seldom seen. Sometimes only once. Recently many overpriced 067-XXXX-99 Fixtures pop up on eBay and also TekWiki has a lot of these new ones archived. Those I didn't mean. I mean the items you cannot find with google and other search engines. But they exist in the wild.

Greetings,

Egge Siert


Re: Looking for

Colin Herbert
 

I think if you find one of those, that it will be protected by unicorns. According to Dennis Tillman in TekWiki, there were only about 40 made. If I understand correctly from past discussion on this "holy grail" plug-in, Dennis has one (not for sale).
As I also understand it, the likelihood of anyone having a legitimate purpose for owning and using one, other than simple collection, is almost zero. As a retired Research Chemist, I am aware of what it is capable of doing and I would love to own one, but (1) it would sit on a shelf most of the time and (2) it would reduce my bank-balance significantly.
Give it up...
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of stevenhorii
Sent: 10 July 2020 21:41
To: TekScopes@groups.io
Subject: [TekScopes] Looking for

I am looking for a rare 7000-series plug-in: A 7J11 optical spectrum analyzer with the external detector head. I know that these are uncommon as I don't think Tek made many of them (high price). If anyone knows of one for sale, let me know off-list. Thanks!


Re: Tektronix 2230

satbeginner
 

Hello Saroj,

Another thing popped into my mind:

Before putting the transformer back, if you have another scope and a sine generator, you could verify the fase of the windings.

And another one:

Once you are at the point of powering on again, connect a voltmeter to the first switcher to check the 43V it is supposed to generate.

It could be the first time -because of the wrong feedback signal- the voltage of the first switcher was way to high, and the scope was saved by the second regulator and the crowbar circuit.

Succes!!

Leo


Re: Tektronix 2230

satbeginner
 

Hi Saroj,

Could very well be. The Kaptan comes as sheets of foil, as self adhesive tape, etc.

I believe it's also used as solder mask and as protection during manufacturing.

See this partial wiki text:

Kapton tape (yellow) used to insulate the leads of a battery cell in a bluetooth headset.
Due to its large range of temperature stability, and its electrical isolation ability, Kapton tape is usually used in electronic manufacturing as an insulation and protection layer on electrostatic sensitive and fragile components. As it can sustain the temperature needed for a reflow soldering operation, its protection is available throughout the whole production process, and Kapton is often still present in the final consumer product.


Re: Tektronix 2230

Raymond Cote
 

Digikey lists it as available in tape form.
YMMV

In matters of style, float with the current. In matters of Principle, stand like a rock. “. — Thomas Jefferson —

On Jul 11, 2020, at 02:54, Saroj Pradhan <sarojman.Pradhan@...> wrote:



On Sat, Jul 11, 2020, 1:04 PM satbeginner <@satbeginner> wrote:

Hello Saroj,

Many moons ago in the lab I worked we had a guy who made all the special
use transformers we needed.

I learned from him to use what he used :-)

In between windings he used a thin layer of Kaptan foil (polyimide, thin
light brown, slightly transparent) held in place with a simple piece of
normal electrical tape.
Then the next winding, insulation layer, next winding, etc.

This kaptan is heat resistant, thin and also provide s good isolation.

Sometimes you find it as a foil used in old electrical devices,and you
only need a little.

Good luck,

Leo





Re: DP512 12 GHz Digital Prescaler

Egge Siert
 

Hi Joe,

From a German eBay Member (I assume a former Tektronix Germany employee) I got the following answer:

"Guten Tag, ja ich weiß es, es sollte mal einen Eigenbau eines Prescalers bis 14 GHZ werden, das Projekt wurde aber nie gestartet.

Mfg Klaus Chudzinski"

The earlier mentioned Rubidium Standard Plug-In was in fact a 10MHz GPS Standard named GS510. Pictures of it are now in the posession of TekWiki.

Greetings,

Egge Siert


Re: Tektronix 2230

Saroj Pradhan
 

Hi Satbeginner
Thanks for the information.
Is kapton a sheet that we put in the pcb to protect components while hot
airing the pcb?
To day I put the 1-2 winding. The number of turns came out to be 153.
Thanks
Saroj

On Sat, Jul 11, 2020, 1:04 PM satbeginner <@satbeginner> wrote:

Hello Saroj,

Many moons ago in the lab I worked we had a guy who made all the special
use transformers we needed.

I learned from him to use what he used :-)

In between windings he used a thin layer of Kaptan foil (polyimide, thin
light brown, slightly transparent) held in place with a simple piece of
normal electrical tape.
Then the next winding, insulation layer, next winding, etc.

This kaptan is heat resistant, thin and also provide s good isolation.

Sometimes you find it as a foil used in old electrical devices,and you
only need a little.

Good luck,

Leo




Re: Tektronix 2230

satbeginner
 

Hello Saroj,

Many moons ago in the lab I worked we had a guy who made all the special use transformers we needed.

I learned from him to use what he used :-)

In between windings he used a thin layer of Kaptan foil (polyimide, thin light brown, slightly transparent) held in place with a simple piece of normal electrical tape.
Then the next winding, insulation layer, next winding, etc.

This kaptan is heat resistant, thin and also provide s good isolation.

Sometimes you find it as a foil used in old electrical devices,and you only need a little.

Good luck,

Leo


Re: Tektronix Blue paint - source in the UK ??

chris gare
 

I'm from the UK and don't quite understand the "Bluebase 79126" reference? The the other colors are fine as they are in Ounces?

Help please anyone!

Chris


Re: FG-504 not-so odd behavior

keantoken
 

The oscillator has two outputs, a triangle output for the triangle and sine functions and a square output for the square function. J300 is the triangle output. The oscillator always outputs both when it is working as they are both parts of the feedback loop.
Since both waves come from the same oscillator it is very strange if the frequency changes when changing function, as that only changes which output is used from the oscillator. On Friday, July 10, 2020, 09:45:57 PM CDT, John Ferguson via groups.io <jferg977=aol.com@groups.io> wrote:

the pegged frequency is only on the square wave. I looked at it briefly
and it isn't square but triangular.  fwiw, I'll check frequency at the
10to the second setting and compare it with what I'm getting on the sine
and triangular.

john

On 7/10/20 6:55 PM, keantoken via groups.io wrote:
For the unit with frequency pegged high, I would look for an open x40 cal trimmer or dial min cal trimmer. Anything pulling the U30A/B inputs low will peg the frequency high.



Re: Looking for

stevenhorii
 

Oops - Thanks for the correction!

On Fri, Jul 10, 2020, 23:42 Dennis Tillman W7pF <@Dennis_Tillman_W7pF> wrote:

7J20 and J20.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
stevenhorii
Sent: Friday, July 10, 2020 1:41 PM
To: TekScopes@groups.io
Subject: [TekScopes] Looking for

I am looking for a rare 7000-series plug-in: A 7J11 optical spectrum
analyzer with the external detector head. I know that these are uncommon as
I don't think Tek made many of them (high price). If anyone knows of one
for sale, let me know off-list. Thanks!





--
Dennis Tillman W7pF
TekScopes Moderator




Re: Looking for

 

7J20 and J20.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of stevenhorii
Sent: Friday, July 10, 2020 1:41 PM
To: TekScopes@groups.io
Subject: [TekScopes] Looking for

I am looking for a rare 7000-series plug-in: A 7J11 optical spectrum analyzer with the external detector head. I know that these are uncommon as I don't think Tek made many of them (high price). If anyone knows of one for sale, let me know off-list. Thanks!





--
Dennis Tillman W7pF
TekScopes Moderator


Re: DP512 12 GHz Digital Prescaler

JoeKoch
 

Hi,
I buyed it.
The front looks like a modified DP501 and the holes for LEDs are drilled afterwards. The front is also not a typical laminate for the late series, its a thick plastic ( ~1 mm ) . I never had seen such a front type.

The other Rubidium Standard plugin with the blue PCBs are selfmade. I owned these PCBs also . Version 1 PCB is not really ok, wrong holes and wrong contact spacing.

cheers

Joe


Re: R7704+7A18+7B53A in Newport Beach, CA to part with

@DC912
 

Hello Chris. Did you ever hear from Abc Xyz? If not, I’m interested in the unit but I couldn’t find you in the Directory to contact you offline. Dave