Date   

Re: Tek Blue Paint

Christopher Hilton-Johnson
 

For those in the UK, Tek paint colours can be ordered from

Paints4U,  unit 12,  estate road 8, Grimsby DN31 2TG

phone: 01472 488386

I had them make up 2 spray cans in mid 2014. They were an excelent colour match.

I spoke with them today, and all they need to repeat the magic mixture is my order number from 2014, which is 089339

enjoy

Chris HJ



Re: Trying to bring back a AA501

Piero-Gmail
 

Hi Eric,

I fixed same distortion problem based on freq on a AA5001 replacing the out of specs capacitors on the input board A14:

C1220 to C1225.

Hope this helps.

regards


Re: Trying to bring back a AA501

Piero-Gmail
 

Hi Eric,

I fixed same distortion based on freq problem on a AA5001 replacing the out of spec capacitors on the input board A14:

C1220 to C1225.

Hope this helps.

regards

Il 17/01/2020 04:04, Eric ha scritto:
The real issue is my confidence level going "off script" I am not well versed in subbing a part for a non exact match part. but gaining experience every day. I have some IC's ordered so we will see what happens. The good news is this is a common as dirt NAND gate.

On 1/16/2020 8:55 AM, Rick Bale wrote:
Eric, what is the basic criteria needed to be sure the swapped device will work? From all the steps you’ve taken with this resurrection so far, I think you know how to assess the swap.



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Re: TDS3000B calibration

Egge Siert
 

Hi David,

A suggestion:

https://us.flukecal.com/products/electrical-calibration/electrical-calibrators/9500b-oscilloscope-calibrator?quicktabs_product_details=2

By the way the PG503 has < 200ps Risetimes at 250 MHz.

Greetings,

Egge Siert


Re: Tek Blue Paint

Brendan
 

On Wed, Mar 25, 2020 at 06:20 AM, Bert Haskins wrote:



On 3/23/2020 11:11 PM, Brendan via Groups.Io wrote:
The closest I have been able to come is Bahama Sea by Krylon.
I bought some of this for my 22xx scopes and it is way off, at least for
matching.

- Bert



I have never tried to match anything. I have always painted the entire scope. Yes it does not match when sitting next to another scope. I have quite a few scopes and none of them really match next to one and other. I used it to paint a 7633, 468 and a 453 and they turned out really nice.


TEK 575 and 517 in Tucson

Tom Bowers
 

The only electronic component supplier I know of in Tucson, AZ is Elliott Electronic Supply. They recently opened a surplus store in the other half of their building and today was the first time I had a chance to see what is there. They have a 575 curve tracer and a 517 scope. From the front, they are pretty dirty but don't look damaged as far as I could see. I have no idea what the operating condition might be, or if the internals are even present. But if anyone is interested, you can call them at 520-884-7394. They are open M-F from 8 - 5:30 and Sat 9-3 Arizona time. I am not at all associated with them, just passing this along in case someone is interested. The 575 is priced at $20 and the 517 is priced at $25. I took a picture of the front of each which I can supply if interested, email me at pvhengineering at g mail dot com. Tom Bowers


Re: TDS3000B calibration

 

Not arguing that the technology didn't exist to do that, but the standard calibration kit in the form of the CG551AP, or CG5001 top out at 100kHz for the Fast edge setting.

The PG502 is no way a fast edge pulse generator - it has a rise time of about 1nS. I've never encountered a fast edge calibrator (RT 150pS or so) that did even 1MHz.

David

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of benj3867 via Groups.Io
Sent: 25 March 2020 20:39
To: TekScopes@groups.io
Subject: Re: [TekScopes] TDS3000B calibration

@David, @amirb, sorry to dispel your theories.

First, they did have equipment capable of producing such pulses with repetition rates well beyond 10MHz decades before the TDS3000 series was conceived.
For example, the Tektronix PG502, introduced in 1974, could produce such pulses with repetition rates up to 250MHz, and this is just off the top of my head.
Higher performing pulse generators existed well before the PG502

As for the theory that they simply wanted to use a specific calibration equipment, this also does not hold water since the recommended Wavetek 9500 can produce such pulses with a repetition rate up to 2MHz.

Finally, @amirb, you are confusing calibration with performance verification. The calibration process is not trying to measure rise-time or bandwidth because these cannot be adjusted.

In any case guys, all you need is in the manuals and spec sheets, so you don't need anybody's help, and can easily figure things out yourselves.
Good luck with your efforts!


Re: Tek Blue Paint

Jim Ford
 

Yes, different people see things differently.   That may explain why Dave had two wives! ;)Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: ArtekManuals <manuals@...> Date: 3/25/20 7:32 AM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tek Blue Paint A couple of points about this comment (which is very valid)1) Paint that is 40 years old versus a shade today will have aged differently  due to underlying formulation aging characteristics, time and UV exposure. A paint job that matches today may not match 10 years from now due to different aging characteristics of the two paints. If your really OCD about paint jobs you should paint the whole thing so that you don't have a mismatch due to differences in aging characteristics2) (both) of my wives were artist and my brother in-law who was a (color blind) engineer for Bausch and Lomb  for 20+years will all tell you that the structure in our eyes are different from person to person and that we do not all see given colors in the same hue. What you may have heard of as "rods and cones" in our eyes for color vision are actually resonant structures not unlike what we are used to thinking about in microwaves . So while a given touch up may look perfect to me to another person it may look like a giant zitHave fun ...me I stopped worrying about the color of things 35 years agoDavemanuals@... 3/25/2020 9:20 AM, Bert Haskins wrote:>> On 3/23/2020 11:11 PM, Brendan via Groups.Io wrote:>> The closest I have been able to come is Bahama Sea by Krylon.>> I bought some of this for my 22xx scopes and it is way off, at least > for matching.>> - Bert>>>>>>>>> >-- DaveManuals@... This email has been checked for viruses by Avast antivirus software.https://www.avast.com/antivirus


Re: TDS3000B calibration

benj3867
 

@David, @amirb, sorry to dispel your theories.

First, they did have equipment capable of producing such pulses with repetition rates well beyond 10MHz decades before the TDS3000 series was conceived.
For example, the Tektronix PG502, introduced in 1974, could produce such pulses with repetition rates up to 250MHz, and this is just off the top of my head.
Higher performing pulse generators existed well before the PG502

As for the theory that they simply wanted to use a specific calibration equipment, this also does not hold water since the recommended Wavetek 9500 can produce such pulses with a repetition rate up to 2MHz.

Finally, @amirb, you are confusing calibration with performance verification. The calibration process is not trying to measure rise-time or bandwidth because these cannot be adjusted.

In any case guys, all you need is in the manuals and spec sheets, so you don't need anybody's help, and can easily figure things out yourselves.
Good luck with your efforts!


Re: Tek Blue Paint

Bert Haskins
 

On 3/25/2020 10:32 AM, ArtekManuals wrote:
A couple of points about this comment (which is very valid)

1) Paint that is 40 years old versus a shade today will have aged differently  due to underlying formulation aging characteristics, time and UV exposure. A paint job that matches today may not match 10 years from now due to different aging characteristics of the two paints. If your really OCD about paint jobs you should paint the whole thing so that you don't have a mismatch due to differences in aging characteristics

2) (both) of my wives were artist and my brother in-law who was a (color blind) engineer for Bausch and Lomb  for 20+years will all tell you that the structure in our eyes are different from person to person and that we do not all see given colors in the same hue. What you may have heard of as "rods and cones" in our eyes for color vision are actually resonant structures not unlike what we are used to thinking about in microwaves . So while a given touch up may look perfect to me to another person it may look like a giant zit

Have fun ...me I stopped worrying about the color of things 35 years ago

Dave
manuals@...



On 3/25/2020 9:20 AM, Bert Haskins wrote:

On 3/23/2020 11:11 PM, Brendan via Groups.Io wrote:
The closest I have been able to come is Bahama Sea by Krylon.
I bought some of this for my 22xx scopes and it is way off, at least for matching.

- Bert
OK. I took a photo that shows a blank panel painted with Krylon Bahama Sea ( $9.65 @ Amazon ) next to a 465M and one of my favorite 2232s.

The panel was painted quite a while ago and was baked in the sun for several days.

Reply with your regular email address and I will reply with the picture attached.

Please ignore the non Tek box.

If you think this is worth posting to the photos section, I can do that later.

Bert

86 and still in the game.






Re: TEKTRONIX 491 measuring wifi signals

 

Hi Renée,

I find that the 475 is a very fine instrument. Portable, 200 Mhz, dual channel, dual time base. I used plenty of them years ago at work. A true lab workhorse.

I am not a professional musician but just an amateur. The reason I mentioned pianos is because they share with Tektronix a cult of excellence. I am sure you are familiar with a similar excellence in wind instruments.
Like a Tektronix oscilloscope, a top brand piano is a piece of master craftsmanship and art. Like with Tektronix, there is a culture in the appreciation of the older instruments, as well as admiration in the technology of the new ones.
Like I have an old Tektronix 547, unused in the garage for 40 years until recently restored, I have a Mason & Hamlin grand piano, but being played in my living room. This instrument is a 1915, over 100 years old, which makes it twice as old as the 547. And like the 547 with its beautiful sharp trace, it has a refined full sound that is characteristic of this brand from the golden era of pianos.

Good luck fixing your 2710 spectrum analyzer, the 475 must be a good help with this, except in the Ghz range.
Ernesto


Re: TDS3000B calibration

amirb
 

On Wed, Mar 25, 2020 at 01:29 PM, David C. Partridge wrote:


Why would they say 100Hz to 1MHz if 100Hz to 10MHz would also work?
Maybe because there were none that went to 10MHz at that time - a bit like a
laptop I own whose docs say it will take a maximum of 4GB, but will happily
take 8GB.

David
exactly and also because they simply want you to use a specific equipment for the calibration.

I dont have the other tools, so I cannot do the cal on my 3054B but still I think the 10MHz pulser would work

the important thing is what is the scope trying to measure with that pulser. It is not the BW because <1ns wouldn't cut it (the scope rise time itself is rated <700ps
so the pulser should have been much faster) so maybe it is measuring overshoot (undershoot)? but they didnt specify the overshoot of the pulser...


Re: TDS3000B calibration

 

Why would they say 100Hz to 1MHz if 100Hz to 10MHz would also work?
Maybe because there were none that went to 10MHz at that time - a bit like a laptop I own whose docs say it will take a maximum of 4GB, but will happily take 8GB.

David


Re: TDS3000B calibration

benj3867
 

On Wed, Mar 25, 2020 at 12:43 AM, amirb wrote:


for fast rise pulser, is it possible to use one of Leo Bodnar's? is the
frequency really important?
As far as I know, the Leo Bodnar pulser operates at 10MHz which is way too fast.
The TDS3000B service manual says that the frequency should be in the range of 100Hz to 1MHz. Why would they say 100Hz to 1MHz if 100Hz to 10MHz would also work?

While the Bodnar pulser would have been perfectly fine if you were to manually check the rise time of the scope, it will almost certainly not work in the calibration process which is automatic and during which the user can not adjust anything on the scope.

BTW, a suitable fast rise pulse generator can be easily built at home following the instructions in appendix D of Linear Technology Application Note 47 by Jim Williams (easily found on the web). All you need are 3 resistors, a capacitor, and a 2N2369 transistor. You also need a very low-current 90V power supply, which you can either build using an LT1073 as shown in the same article, or simply get from your friendly local *Bay (about $5 for a "DC-DC 8-32V to 45~390V High Voltage Boost Converter").


Re: TEKTRONIX 491 measuring wifi signals

Renée
 

geez Ernesto, seems along my thoughts---I wonder how many here are/were professional musicians???....myself an upper woodwind specialist, still working.....well not in this current environment....back to making oboe reeds.....and fixing my 2710 that was given to me. I wish it had the tracking gen battery made a mess........however,
I am happy with my 475 (200Mhz) ...although someday a 500Mhz would be nice ( think 7000 main frame or a 485).
Renée

On 3/24/20 9:03 PM, Ernesto wrote:
By the way, this high bandwidth scope I mentioned, the tektronix DPO70000SX, can sample at 200 Giga-samples/sec, with 5 pico-second sample resolution. And the price of this instrument with asynchronous time interleaving, ATI, starts at a mere $315,000.00 I know, it leaves my beloved 547 in the dust! But... I seldom need to measure anything with a 5 pico-second resolution. I enjoy the most with audio signals, ultrasound and signals up to the low RF frequencies.*If someone were to give me one as a present, I would sell it promptly and with the money buy a Fazioli concert grand piano.*


Re: Tek Blue Paint

ArtekManuals
 

A couple of points about this comment (which is very valid)

1) Paint that is 40 years old versus a shade today will have aged differently  due to underlying formulation aging characteristics, time and UV exposure. A paint job that matches today may not match 10 years from now due to different aging characteristics of the two paints. If your really OCD about paint jobs you should paint the whole thing so that you don't have a mismatch due to differences in aging characteristics

2) (both) of my wives were artist and my brother in-law who was a (color blind) engineer for Bausch and Lomb  for 20+years will all tell you that the structure in our eyes are different from person to person and that we do not all see given colors in the same hue. What you may have heard of as "rods and cones" in our eyes for color vision are actually resonant structures not unlike what we are used to thinking about in microwaves . So while a given touch up may look perfect to me to another person it may look like a giant zit

Have fun ...me I stopped worrying about the color of things 35 years ago

Dave
manuals@...

On 3/25/2020 9:20 AM, Bert Haskins wrote:

On 3/23/2020 11:11 PM, Brendan via Groups.Io wrote:
The closest I have been able to come is Bahama Sea by Krylon.
I bought some of this for my 22xx scopes and it is way off, at least for matching.

- Bert



--
Dave
Manuals@...
www.ArtekManuals.com
--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: Tek Blue Paint

kim.herron@sbcglobal.net
 

Good info Reed. Just one minor point. Which company
did you have this paint mixed at? Is this
Sherwin-Williams? IF it is, that same paint mix code
should work at a NAPA auto store or anyone else that
has Martin-Senour as they are the same company. I've
done this same thing with Collins and Johnson transmitter
cabinet and face panels. Sherwin Williams still has their
OPEX machine lacquer available and the shine of the
finished sprayed product matches exact. You usually
have to get at least ONE gallon and it ain't cheap

On 24 Mar 2020 at 21:28, Reed Dickinson wrote:

Greetings fellow Tekkies:
I am enclosing the formula for the Williamsburg Blue paint that Tek
used on their 4XX series of scopes as well as some others. I am now
on my third gallon of it and it has always proved to be a perfect
match. It has been over ten years since I first posted this formula
and I cannot remember where or how I got it, but it works!

Y = ounces
48 points = 1 ounce

I am not too sure what all these numbers mean, perhaps the people in
the paint store can decipher it. This is what was on the label after
I had my local paint store mix up a batch. It matched perfectly too.
I use enamel as lacquer over enamel can pucker up where enamel on
lacquer is no problem. I carefully clean all dirt, sticker residue
and any other blemishes from the case, lightly sand the entire
surface and spray two light coats on the case with a light sanding
between coats. I paint the plastic parts too using the same
procedure.

B 4Y22 Black
C 33 Yellow Oxide
D 1Y29 Green
W 1Y32 White
E 1Y45 Blue

Base 7-916

Reed Dickinson

On Tuesday, March 24, 2020, 01:22:09 PM PDT, Stephen Hanselman
<kc4sw.io@...> wrote:

If you have the formula, which I take to mean the constituent
colors try a PPG auto paint store.  When I was redoing my TR6 (car
type) they were able to generate an exact match to the factory color
and they make spray cans.  You might also try the local HD or lowes
and see if their color matcher can give you a read out on the base
colors for the match

steve

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of JJ
Sent: Tuesday, March 24, 2020 9:27 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tek Blue Paint

Bob, I found this thread from 2009.
https://groups.io/g/TekScopes/topic/7640708?p=Created,,,20,2,0,0.
Reed Dickinson posted a formula. Stan also had the paint made up -
minimum order quantity is 24 spray cans! Stan was selling them for
$15/can. I don't need 24 cans.
The Tek blue subject was brought up back in 2004 and then again in
2009 where the reference to 2004 was made.
It's still not clear whether Reed's posted formula came from Tek or
whether he had a sample analyzed by a paint firm? And, whether
Stan's paint was Reed's same formula made by Sherwin Williams?

John Justin








John Goller, K9UWA & Jean Goller, N9PXF
Antique Radio Restorations
k9uwa@...
Visit our Web Site at:
http://www.JohnJeanAntiqueRadio.com
4836 Ranch Road
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1-260-637-6426


Re: Tek Blue Paint

Bert Haskins
 

On 3/23/2020 11:11 PM, Brendan via Groups.Io wrote:
The closest I have been able to come is Bahama Sea by Krylon.
I bought some of this for my 22xx scopes and it is way off, at least for matching.

- Bert



Re: TDS3000B calibration

amirb
 

for fast rise pulser, is it possible to use one of Leo Bodnar's? is the frequency really important?


Re: TEKTRONIX 491 measuring wifi signals

 

By the way, this high bandwidth scope I mentioned, the tektronix DPO70000SX, can sample at 200 Giga-samples/sec, with 5 pico-second sample resolution. And the price of this instrument with asynchronous time interleaving, ATI, starts at a mere $315,000.00 I know, it leaves my beloved 547 in the dust! But... I seldom need to measure anything with a 5 pico-second resolution. I enjoy the most with audio signals, ultrasound and signals up to the low RF frequencies. If someone were to give me one as a present, I would sell it promptly and with the money buy a Fazioli concert grand piano.