Date   
Re: Nuvistor 8393

Jan Wuesten
 

thank you very much

jan

Am 07.11.18 um 11:36 schrieb Dave Voorhis:

On 7 Nov 2018, at 09:57, Jan Wuesten <fjz@...> wrote:

Hello,
i got a bunch of Tek Matched pair 8393 nuvistors but I lack further information, data etc. Anybody here able to help ?
Have you seen http://w140.com/tekwiki/wiki/8393 ?
--
Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten (Telefon direkt: 04882-6054551)

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-(0)4882-6054551 Fax : +49-(0)4882-6054552
<https://www.die-wuestens.de> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten; UStID: DE814610403
**************************************************
Wichtige Informationen:
Unsere Datenschutzerklärung: <https://www.die-wuestens.de/DSE2.pdf>
Widerrufsformular als PDF: <https://www.die-wuestens.de/widerruf.pdf>
Kontakt und Bestellabwicklung: <https://www.die-wuestens.de/kontakt.htm>
Unsere vollständigen AGB: <https://www.die-wuestens.de/agb.htm>
**************************************************

Re: Nuvistor 8393

Dave Voorhis
 

On 7 Nov 2018, at 09:57, Jan Wuesten <fjz@...> wrote:

Hello,
i got a bunch of Tek Matched pair 8393 nuvistors but I lack further information, data etc. Anybody here able to help ?
Have you seen http://w140.com/tekwiki/wiki/8393 ?

Re: "I wonder how many members here have a 564" Dave V.

Albert Otten
 

I have three 564 of different degrees of sophistication, two 564B and one 561B. Several ordinary plugins and sampling plugins, and a Nelson-Ross PSA225 spectrum analyzer plugin. I have used an 564 extensively to "study" all aspects of sampling technology of that era.
Albert

Re: 475 Manual with Voltages/Waveforms?

ArtekManuals
 

What is the serial number of your unit?

Dave
manuals@...

On 11/7/2018 4:36 AM, agwnorden via Groups.Io wrote:
Thank you, I do have a very nice original Tek manual but it does not include any voltages or waveforms.. Assume thart the Artek ones are also scans of these Tek originals(?).


--
Dave
Manuals@...
www.ArtekManuals.com

Nuvistor 8393

Jan Wuesten
 

Hello,
i got a bunch of Tek Matched pair 8393 nuvistors but I lack further information, data etc. Anybody here able to help ?

This would be vERY appreciated :-) Jan from Germany


--
Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten (Telefon direkt: 04882-6054551)

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-(0)4882-6054551 Fax : +49-(0)4882-6054552
<https://www.die-wuestens.de> (Deutsch, English, Francais)
Email <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten; UStID: DE814610403
**************************************************
Wichtige Informationen:
Unsere Datenschutzerklärung: <https://www.die-wuestens.de/DSE2.pdf>
Widerrufsformular als PDF: <https://www.die-wuestens.de/widerruf.pdf>
Kontakt und Bestellabwicklung: <https://www.die-wuestens.de/kontakt.htm>
Unsere vollständigen AGB: <https://www.die-wuestens.de/agb.htm>
**************************************************

Re: 475 Manual with Voltages/Waveforms?

agwnorden@...
 

Thank you, I do have a very nice original Tek manual but it does not include any voltages or waveforms.. Assume thart the Artek ones are also scans of these Tek originals(?).

Re: Tek 585A - Scope repair UPDATE

Craig Sawyers <c.sawyers@...>
 

You might find that one of the carbon comp resistor that is part of the voltage adjustment
divider has
drifted up quite a bit, causing the change, and then the need to move the adjust pot so much.

I had a scope where I was at the very end of the pot and had to replace the resistor that had
drifted so
far to bring it back to the middle of the pot.

On the other hand it probably will work fine. I would just check it after more run time.


John
Yes - carbon comps drift high. The higher the original value, the greater the percentage drift.

They have great benefits though. In power supplies they will take inrush currents to way above their
nominal power rating, because the power is dissipated in a resistive rod. Carbon film or metal film
resistors tend to burn out under those circumstances. And carbon composition resistors have very low
self inductance -so Tek used them in high speed circuits. The 7T11 sampling timebase is full of the
smallest physical size carbon composition resistors for precisely that reason.

But resistance drifting high is the big difficulty in the technology.

Craig

Re: 425 Mil vertical module needed....seeking

Jack
 

I want to thank all those people who have so far helped me out...Fabio, Michael Harvey Bert and Peter...hope I've not missed anyone. I'm waiting for an email from Bert which will not doubt come to goldmort@... when he gets a chance to and Peter who generously and speedily gave great practical help with a part which can what can if all else fails, be used to replace the broken part on mine....such help has been so appreciated.
Warm Regards
--
Jack

Re: Tek 585A - Scope repair UPDATE

ykochcal
 

You might find that one of the carbon comp resistor that is part of the
voltage adjustment divider has drifted up quite a bit, causing the change,
and then the need to move the adjust pot so much.

I had a scope where I was at the very end of the pot and had to replace the
resistor that had drifted so far to bring it back to the middle of the pot.

On the other hand it probably will work fine. I would just check it after
more run time.


John

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of YudaMan3
via Groups.Io
Sent: Tuesday, November 06, 2018 6:56 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tek 585A - Scope repair UPDATE

Jack, Tom Miller and Chuck Harris and others: I got lucky on the -150
supply. I was able to adjust from -160 to -150 spec with about 50 degrees
of pot rotation and the -150 supply has been rock solid for 30 minutes. I
will next try to tackle the 350V and 500V supplies. Thanks for all you
inputs ... they encourage me and I'm making progress for sure.

Re: Tek 585A - Scope repair UPDATE

Jack
 

That's fantastic Yudaman3....I guess maybe had given the pot a good spin.....My precaution was looking at whether it was the correct pot and to not lose
track of its current setting. That feeling of support you've received from the various helpers can do wonders.

My Regards

--
Jack

Re: Tek 585A - Scope repair UPDATE

YudaMan3 <jamesvyu@...>
 

Albert, Tom Miller and Chuck Harris: AS YOU (Tom and Chuck) BOTH ADVISED, as soon as I got the -150 supply properly adjusted, everything else is spot on ... 100, 225, 350, 500! I am so happy.

As Albert noted .... some were off more or less off by 160/150 for several of the supplies and substantially more than that for the others. I still have to check/adjust 12.6V.

THANK YOU!

Re: Tek 585A - Scope repair UPDATE

YudaMan3 <jamesvyu@...>
 

Jack, Tom Miller and Chuck Harris and others: I got lucky on the -150 supply. I was able to adjust from -160 to -150 spec with about 50 degrees of pot rotation and the -150 supply has been rock solid for 30 minutes. I will next try to tackle the 350V and 500V supplies. Thanks for all you inputs ... they encourage me and I'm making progress for sure.

Re: "I wonder how many members here have a 564" Dave V.

Jeffrey Frantzen
 

I have 3 standard 564B and 3 standard 561A. I also have 2 568 readout oscilloscopes that I haven't had time to work with yet. I've also collected 60 plug-ins of the 2A, 2B, 3A, 3B, 3C, 3S, and 3T varieties to use with these scopes. I enjoy working with this family of scopes, they are very durable and reliable, despite their size and considering their age.

Jeff

On Tuesday, November 6, 2018 6:36 PM, unclebanjoman <mmazza@...> wrote:


I'm from Italy.
I have two 564, perfectly working. I use them enough - I like their analog storage capabilities.
Plugins are 3B3, 3B4, 3A1,3A3, 3A6, 3A72, 3S1, two 3T77, 3T77A.
One mainframe was modified to derive out the differential signal in singled-ended connection from the 3A3 using two BNC connectors on the rear (of the mainframe). so I can exploit the differential capacities of 3a3 and display them on a more modern digital scope for storage purposes.
Max

Re: No contribution from David Hess since July 18th

 

Hi Michael,

As much as I love Steven Wright's sense of humor and your contributions to TekScopes we really need to stop the irrelevant chatter. Unfortunately I inadvertently contributed to it this time.

This chatter is seen by guys like Jack <goldmort@...> as a reason he can say what he wants and insult other members.

Yesterday when I told him to stop he refused and sent me a 2 page long email to explain himself and to bait me into answering it. This is what he has been doing all along. The only way to stop him for now is to ignore him. I told him to confine his future posts to a single ten word or less sentence or at most to a paragraph consisting of three of those at most.

I also warned him not to engage in a pissing contest with anyone on TekScopes ever again.

Dennis

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Michael
A. Terrell
Sent: Tuesday, November 06, 2018 5:38 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] No contribution from David Hess since July 18th

Well, you can't have everything! Where would you keep it, if you could? ;-)


Michael A. Terrell


-----Original Message-----
From: Dennis Tillman W7PF <@Dennis_Tillman_W7PF>

Nuts, I was too late. Another invention of mine has already been invented
by someone else who did a better job no less!
Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Michael A. Terrell

I guess that you've never seen the heat shrink connectors for .500,
.750 or larger hardline that have to be heated to allow you to slide
the cable into? They are pre-shrunk.


Michael A. Terrell



--
Dennis Tillman W7PF
TekScopes Moderator

Re: No contribution from David Hess since July 18th

Michael A. Terrell
 

Well, you can't have everything! Where would you keep it, if you could? ;-)


Michael A. Terrell

-----Original Message-----
From: Dennis Tillman W7PF <@Dennis_Tillman_W7PF>

Nuts, I was too late. Another invention of mine has already been invented by someone else who did a better job no less!
Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Michael A. Terrell

I guess that you've never seen the heat shrink connectors for .500, .750
or larger hardline that have to be heated to allow you to slide the cable
into? They are pre-shrunk.


Michael A. Terrell

Re: "I wonder how many members here have a 564" Dave V.

unclebanjoman
 

I'm from Italy.
I have two 564, perfectly working. I use them enough - I like their analog storage capabilities.
Plugins are 3B3, 3B4, 3A1,3A3, 3A6, 3A72, 3S1, two 3T77, 3T77A.
One mainframe was modified to derive out the differential signal in singled-ended connection from the 3A3 using two BNC connectors on the rear (of the mainframe). so I can exploit the differential capacities of 3a3 and display them on a more modern digital scope for storage purposes.
Max

Re: 475 Manual with Voltages/Waveforms?

tom jobe <tomjobe@...>
 

One thing you seem to be missing is the fact that there is a low serial number service manual, and a separate high serial number manual for the non-A models of the Tektronix 475 oscilloscope.
Perhaps you should spend a small amount of money and buy the proper service manual PDF file for your 475 from Artek Manuals, or from another vendor you might trust?
tom jobe...

On 11/6/2018 7:29 AM, agwnorden via Groups.Io wrote:
The Schematics .pdf on the TekWiki site is good but it is for the A scope; any pointers to the 475 itself. Guess still very useful anyway. Am I missing something? Thank you.

Re: Tek 465 "B" Sweep

Jim Ford
 

Yes, tin/lead ratio would need to be 63/37 percents (Sn63), which is called the eutectic (Greek for "melts well") ratio.  Sn60, which is 60 percent tin and 40 percent lead, gets a bit plasticity as it melts, probably allowing the peanut oil time to burn.Tin dissolves gold and silver so it makes sense that the tin/lead solder would have to be removed before gold plating.  I assume that was copper that was being plated over.Ferric chloride is a rather nasty chemical.  I remember using small bottles of the stuff to etch copper boards.  It appeared dark brown to me in the bottle but looked yellow in the etching pans.  Diluted it as much as I could before flushing it down the toilet. LOL about replacing pipes!Jim FSent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Chuck Harris <cfharris@...> Date: 11/6/18 1:43 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Tek 465 "B" Sweep Tin/lead plating was the most common way back in the80's.  Everything I said below, for gold, was the same, onlythere was a step where the plated board was dipped in hotpeanut oil to convert the tin/lead plating into solder.We had to be very careful to keep the tin/lead percentagesjust right, or the peanut oil couldn't melt the plating attemperatures that wouldn't burn the oil.Tin/lead resist also brings another interesting problem.If you want gold fingers, you have to remove the tin/leadplating from the fingers before you can plate them withgold.We used ferric chloride to etch the tin/lead plated boardsin two different board houses that I worked at.  AmmoniumPersulfate is clear, and turns blue when being used as anetchant... the stuff we used was reddish, and turned muddybrown/yellow/green after etching.All the ferric chloride I have bought in small quantitieswas a brownish/yellow green... but the carboys of  newferric chloride is reddish.  I figured that the small guyswere bottling used etchant, and selling it to hobbyists andsmall producers.Back when I did this, the supplier offered $30 per carboyof used etchant... 30 gallons, IIRC.  We went through enoughthat if we recycled the etchant, it would have been enoughto pay my wages... and yet they wouldn't let me recycle it,but rather dumped it down the drain.  Every couple of yearsthey had to break up the floor to install new sewer lines.-Chuck HarrisHarvey White wrote:> On Tue, 6 Nov 2018 11:10:05 -0500, you wrote:> >> Tek and HP used the gold plating *as* the solder mask for>> copper etching.> > You can also (as I'm told) do this with tin/lead plating. You need to> use ammonium persulphate since that doesn't attack lead or tin. Ferric> Chloride or CuCl, nope.> > Harvey> >>>> Their process was (approximately):>>>> 1) drill plated through holes>> 2) plate through holes.>> 3) silkscreen a mask on board that covers everything that>>   isn't a trace.>> 4) gold plate board.>> 5) remove mask.>> 6) etch board.>> 7) drill board holes that aren't plated through>> 8) route outline of board.>>>> -Chuck Harris>>>> Jeff Urban wrote:>> ...>>>>>> This board is obviously copper, but is overplated with gold. As with any board it has connections to the components. Without solder mask the solder will cover all the foil, but it didn't. The only thing that makes sense is that they removed the solder mask after. And they have whose cutouts for connections to things with too much thermal mass, which would throw the whole process off. >>>>>>> > > > >

Re: "I wonder how many members here have a 564" Dave V.

David Holland
 

Yes.... The one in
http://w140.com/tekwiki/wiki/File:Tek564_storage_display.jpg Is mine.
( And a reasonable number of plugins to go with the 564, and a
561B... )

Anyone have a 3B5 they can't live with? - I need to find one to go
along with a 3A5.... The 3B5 has been in my ePay watch list forever
with no hits.... :-/

David

On Tue, Nov 6, 2018 at 5:50 PM Jack <goldmort@...> wrote:

As an particular question ( I suddenly feel somewhat envious of Tim) I wonder if there's a forum contributor in Australia with 564...?

Jack


Re: "I wonder how many members here have a 564" Dave V.

Jack
 

As an particular question ( I suddenly feel somewhat envious of Tim) I wonder if there's a forum contributor in Australia with 564...?

Jack