Date   

Peter Keller CRT Articles and Book. WAS: Reworked Tek' Lit

 

Pete Keller is prolific writer about cathode ray tubes and many other kinds
of display technologies.
He published a very detailed book on the subject in 1991 which I highly
recommend. The book title is:
"The Cathode Ray Tube, Technology, History, and Applications", Peter A.
Keller. 320 p.
ISBN 0-9631559-0-3;
TK7871.73.K46;
621.3815'42-DC20

I purchased my copy directly from Peter in Aloha, OR (not far from
Beaverton). That way I was able to meet him and have him autograph it for
me.

Pete will sell you a copy for far less than Amazon and all the other book
sellers who specialize in hard to find books want for it ($75 to $150). I
have Pete's contact information which I can provide to anyone who wants to
buy his book from him directly. I no longer remember what I paid for his
book but it was well worth it. I read it cover to cover.

Contact me OFF-LIST at dennis at ridesoft dot com for his contact info.

Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Glydeck
via groups.io
Sent: Thursday, November 12, 2020 10:53 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] [Test-Equipment-For-Sale-Wanted-or-Exchange]
Reworked Tek' Lit

Bill,

Really nice scans. Thank you for sharing.

George
On Nov 12, 2020, at 8:39 AM, Bill Perkins <sales@pearl-hifi.com> wrote:

Guys:
Here's a bunch of Tek' lit I've lately reworked, noting that I've
posted this to several lists.

The Cathode-ray Tube, 330pgs:
https://www.pearl-hifi.com/06_Lit_Archive/15_Mfrs_Publications/35_Tektronix/
Tektronix_Lit/The_Cathode_Ray_Tube.pdf

Tek CRT History:
https://www.pearl-hifi.com/06_Lit_Archive/15_Mfrs_Publications/35_Tektronix/
Tektronix_Lit/Textronix_CRT_History.pdf

Tek_7K_Series_Digital_Plug-In_Applications:
https://www.pearl-hifi.com/06_Lit_Archive/15_Mfrs_Publications/35_Tektronix/
Tektronix_Lit/Tek_7K_Series_Digital_Plug-In_Applications.pdf

A_Primer_of_Waveforms_and_Their_Oscilloscope_Displays:
https://www.pearl-hifi.com/06_Lit_Archive/15_Mfrs_Publications/35_Tektronix/
Tektronix_Lit/A_Primer_of_Waveforms_and_Their_Oscilloscope_Displays.pdf

Best,
Bill Perkins











--
Dennis Tillman W7pF
TekScopes Moderator


Re: Question, and shameless plug...

Bruce Lane
 

I just updated the listing to allow what I think is Ebay's
International economy shipping. Try recalculating based on that, and see
what happens.

Thanks!

On 12-Nov-20 09:53, Colin Herbert via groups.io wrote:
The 7L5 looks interesting, but the shipping to the UK is eye-watering. I realise that it isn't your decision, but $537-plus - ouch!
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Bruce Lane
Sent: 12 November 2020 00:56
To: TekScopes@groups.io
Subject: [TekScopes] Question, and shameless plug...

Fellow Tekkies,

I've posted a couple of 7L series modules I have up on Ebay,
specifically a (working) 7L5 and a (non-functional) 7L14. Here's a link
if you're interested.

https://www.ebay.com/sch/i.html?_nkw=&;_in_kw=1&_ex_kw=&_sacat=0&_udlo=&_udhi=&_ftrt=901&_ftrv=1&_sabdlo=&_sabdhi=&_samilow=&_samihi=&_sadis=15&_stpos=98030-8803&_sargn=-1%26saslc%3D1&_salic=1&_fss=1&_fsradio=%26LH_SpecificSeller%3D1&_saslop=1&_sasl=bftbell&_sop=12&_dmd=1&_ipg=200&_fosrp=1

With that out of the way -- I do have one question on the 7L14 unit. It
had the weirdest serial number label I've ever seen, in the form of an
uppercase B (Beaverton, I'm pretty sure) followed by what looks like a
lower-case 'o' with a vertical slash through it, and ending in a numeric
'4.'

My gut says this means it could have been a prototype. Yes? No? Other?

Thanks much!
--
---
Bruce Lane, ARS KC7GR
http://www.bluefeathertech.com
kyrrin (at) bluefeathertech dot com
"Quando Omni Flunkus Moritati" (Red Green)


Re: Question, and shameless plug...

Ed Breya
 

Actually, there was also another phase - "E" for engineering - more of a proof of concept type deal, and maybe only one or two ever in existence. A and B came later, if the project was approved, and made in quantities sufficient for testing. B was the perfected version of A, and very close to production. Bs were made in sufficient quantity for final EMC, environmental, safety and other testing, and for use as field sales and service demos at introduction. No phase instruments were ever intended for sale - they usually remained as field office demos, any many were given to product development team members, with the stipulation that they were not to be resold. Any remaining likely were scrapped or showed up at the Country Store. After many years of course, this didn't matter, so many phase units are floating around, junked from field offices, or passed along from team members, or the store.

Ed


Re: Interesting scope on eBay. Hickok copy of 535 or Tektronix?

Jim Tibbits
 

Looks similar to tek 545 ...likely DOD contract to Hickok similar to one
given by them to Lavoie LA-265...
Jim

On Thu, Nov 12, 2020 at 2:33 PM John Williams <books4you4@mail.com> wrote:

Here is something interesting on the eBay site:


https://www.ebay.com/itm/Vintage-Tektronix-Oscilloscope-MX-2330-G/193747752801?hash=item2d1c441761:g:cIYAAOSwcbpfrZ9u

It looks identical to a Tektronix 535 but has Hickok nameplates. I would
be very interested in the story behind this. I wonder if it is a Tek scope
they used for a prototype, or something that they actually constructed.
Anyone have any ideas? Thanks.






Re: 067-0525-01 or equivalent needed.

SCMenasian
 

4 GR874 to BNC adapters could be connected (in 2 pairs) to create two variable length lines. The 874 engagement can be adjusted slightly to create the desired delay.


Re: Question, and shameless plug...

 

Hi Bruce,
That is almost certainly a "B" phase engineering prototype. First comes "A" phase, then when the bugs are worked out that they discover in that phase they attempt to build what would become a final instrument design ready for production. That would be the "B" phase. If they are lucky they find the rest of the problems with their design in this phase, fix them, and now they have a design that is producible as a finished product.

Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Bruce Lane
Sent: Wednesday, November 11, 2020 4:56 PM
To: TekScopes@groups.io
Subject: [TekScopes] Question, and shameless plug...

Fellow Tekkies,

I've posted a couple of 7L series modules I have up on Ebay, specifically a (working) 7L5 and a (non-functional) 7L14. Here's a link if you're interested.

https://www.ebay.com/sch/i.html?_nkw=&;_in_kw=1&_ex_kw=&_sacat=0&_udlo=&_udhi=&_ftrt=901&_ftrv=1&_sabdlo=&_sabdhi=&_samilow=&_samihi=&_sadis=15&_stpos=98030-8803&_sargn=-1%26saslc%3D1&_salic=1&_fss=1&_fsradio=%26LH_SpecificSeller%3D1&_saslop=1&_sasl=bftbell&_sop=12&_dmd=1&_ipg=200&_fosrp=1

With that out of the way -- I do have one question on the 7L14 unit. It had the weirdest serial number label I've ever seen, in the form of an uppercase B (Beaverton, I'm pretty sure) followed by what looks like a lower-case 'o' with a vertical slash through it, and ending in a numeric '4.'

My gut says this means it could have been a prototype. Yes? No? Other?

Thanks much!

--
---
Bruce Lane, ARS KC7GR
http://www.bluefeathertech.com
kyrrin (at) bluefeathertech dot com
"Quando Omni Flunkus Moritati" (Red Green)







--
Dennis Tillman W7pF
TekScopes Moderator


Re: 067-0525-01 or equivalent needed.

 

On Fri, Nov 13, 2020 at 12:07 AM, Raymond Domp Frank wrote:


Experimenting with a line length difference of between 0.2" and 0.4" will
probably allow you to either double or halve the skew of 28 .. 40 ps.
Loosening the bayonet and slightly pulling the plug out will have a visible effect.

Raymond


Re: 067-0525-01 or equivalent needed.

 

On Thu, Nov 12, 2020 at 11:13 PM, gifsim wrote:


I zoomed in and with the cursors I read a difference of about 28 ps
tomorrow I will try to slightly vary the length of one of the lines
to see what happens
Experimenting with a line length difference of between 0.2" and 0.4" will probably allow you to either double or halve the skew of 28 .. 40 ps.
Have fun calibrating your 784A!

Raymond


Re: Another A5 board repair attemp - help needed

Siggi
 

Hey Roger,

I did the math and I'm 90% certain that your R2015 is not connected to pin
14 of U2101. Its current contribution to the DAC is just about the right
magnitude to explain why your references are low.

Siggi

On Thu, Nov 12, 2020 at 3:44 PM Rogerio O <rodd414@gmail.com> wrote:

I did another test and moved J504 to the other position.
The positive reference changed to +1.362V and the negative to --1.244V.
Is this an indication that U2521 is bad?
Thanks
Roger






Re: Interesting scope on eBay. Hickok copy of 535 or Tektronix?

Dave Voorhis
 

On 12 Nov 2020, at 22:37, Dave Voorhis via groups.io wrote:

… Years ago, I had one of the Tek 535 Hickok clones, though mine was badged as a Hickok 1805A. ...
Oops, should be “Tek 545A Hickok clones…”


Re: Interesting scope on eBay. Hickok copy of 535 or Tektronix?

 

https://vintagetek.org/clone-scopes/

https://w140.com/tekwiki/wiki/Hickok

and the very worthwhile book "Winning with people - The first 40 years".

Raymond


Re: Interesting scope on eBay. Hickok copy of 535 or Tektronix?

Dave Voorhis
 

On 12 Nov 2020, at 22:33, John Williams <books4you4@mail.com> wrote:


Here is something interesting on the eBay site:

https://www.ebay.com/itm/Vintage-Tektronix-Oscilloscope-MX-2330-G/193747752801?hash=item2d1c441761:g:cIYAAOSwcbpfrZ9u

It looks identical to a Tektronix 535 but has Hickok nameplates. I would be very interested in the story behind this. I wonder if it is a Tek scope they used for a prototype, or something that they actually constructed. Anyone have any ideas? Thanks.
Just as Apple and IBM personal computers (and IBM mainframes!) were cloned in the 1970’s and 80’s, Tektronix ’scopes were cloned by Hickok and Lavoie.

Years ago, I had one of the Tek 535 Hickok clones, though mine was badged as a Hickok 1805A.

See https://vintagetek.org/clone-scopes/ for the full story of the Tek clones.


Interesting scope on eBay. Hickok copy of 535 or Tektronix?

John Williams
 

Here is something interesting on the eBay site:

https://www.ebay.com/itm/Vintage-Tektronix-Oscilloscope-MX-2330-G/193747752801?hash=item2d1c441761:g:cIYAAOSwcbpfrZ9u

It looks identical to a Tektronix 535 but has Hickok nameplates. I would be very interested in the story behind this. I wonder if it is a Tek scope they used for a prototype, or something that they actually constructed. Anyone have any ideas? Thanks.


Re: 067-0525-01 or equivalent needed.

Gif Sim
 

thanks Raymond

I'm no longer in the lab
from the latest tests
I zoomed in and with the cursors I read a difference of about 28 ps
tomorrow I will try to slightly vary the length of one of the lines
to see what happens
this scope is a tds754D upgraded (with resistors and capacitors) to tds784D .... now it is with original calibration data of the 754D at 500 Mhz ..... it must do the full calibration at 1024 mhz of the 784d ..... .
these days I'm having fun calibrating a 754A upgraded to 784A

a big greeting
Simon


Re: 067-0525-01 or equivalent needed.

 

Hi Eric,
As several people have pointed out already, the 1MHz bandwidth of the 7A22 Differential Amplifier is too low to require a T-cable matched to 0.1".

However, it occurred to me that you may have confused the 7A22 with the 7A13 Differential Amplifier. The 7A13 bandwidth is 100+MHz and it definitely does require a T-cable like the 067-0525 to test and adjust the plugin's high frequency common mode response.

Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Eric
Sent: Wednesday, November 11, 2020 12:01 PM
To: TekScopes@groups.io
Subject: [TekScopes] 067-0525-01 or equivalent needed.

I need this calibration fixture or something like it to calibrate a 7A22 and some 400 series scopes. This fixture is a BNC Y cable the important part is the Y side of the cable is matched length to within 0.1 inch. This is to remove cable aberrations and phase difference to the inputs. I don’t necessarily need the 067-0525 if I can order a matched length Y cable from somewhere.




--
Dennis Tillman W7pF
TekScopes Moderator


Photo Notifications #photo-notice

TekScopes@groups.io Notification <noreply@...>
 

Richard Steedman added the album Hack BSM plug: Photos of a plug which fits a BSM socket, made from a BNC plug and the poly insert and pin of a BNC socket. Shown in use displaying the pre-trigger output of a S-54 sampling head.


The following photos have been uploaded to the Hack BSM plug album of the TekScopes@groups.io group.

By: Richard Steedman


Re: Another A5 board repair attemp - help needed

Rogerio O
 

I did another test and moved J504 to the other position.
The positive reference changed to +1.362V and the negative to --1.244V.
Is this an indication that U2521 is bad?
Thanks
Roger


Re: Another A5 board repair attemp - help needed

Siggi
 

On Thu, Nov 12, 2020 at 3:28 PM Rogerio O <rodd414@gmail.com> wrote:

However any of the outputs seems to vary with time and all the voltages
are equal or lower than 120mV.
How are you probing this? Note that a 1X probe will load the outputs with
1MOhm, which is probably going to make them droop severely between
refreshes.
If you use a 10X probe, you'll load the outputs with 10MOhm, which is still
going to make them droop.
What you should see, however, is that each output should periodically "pop"
to one particular voltage level of the input, and then you'll probably see
them droop down (or up) to your ground level from there in that typical RC
discharging waveform.


WTB Option 13 interface boards for TDS510a/TDS640a

Derek Chauran
 

Hello - I need 2 of the Option 13 RS232/Centronics interface boards/cables/ports for a TDS510a and TDS640a (they're the same part for both scopes). I am not looking to pay fleabay prices for them, as I am a hobbyist and mostly just want them to make these 2 scopes as "complete" as possible. If they are *very* cheap then I may be interested in 4 (to make dedicated "debug" interfaces for these scopes).


Re: 067-0525-01 or equivalent needed.

 

On Thu, Nov 12, 2020 at 09:19 PM, gifsim wrote:


I wish I had a TDR !!
I put some photos with a test (@ 800 mhz +0 dBm) just for fun
the strange thing is that even if I invert the two bnc of the coupler the
tracks do not move (always first the white track and then the green)
I didn't understand this thing .......
You're triggering on CH1, the white trace. If swapping the split-cable plugs between CH1 and CH2 results in the same image, i.e. CH1 the same amount before CH2, it means:
1. The cable's signal lengths for both plugs are about equal
2. What you're seeing is the delay between both channels in the 'scope and that's exactly what the cable is for, when adjusting the 'scope! The difference is about 40 ps.

Raymond

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