Date   
Re: Tek 555 Dual Beam power supply cable/connectors

John Williams
 

The amphenol part numbers for the flat-panel connectors I used are:

Male 26-4100-16P

Female 26-4100-16S

The part numbers for the locking connectors is 26-4301-16

The cable part number is good to have but doesn’t really help because nowhere on the cable does it say tektronix or the part number. I have one locking connector spare. The cables are very hard to find. There is a power supply on eBay with a cable. One could email the seller and offer $100 for the cable, might get lucky. There is also one locking connector but the guy wants $70 for it.

Re: Tek 555 Dual Beam power supply cable/connectors

John Williams
 

I have two different lengths. One is 3 feet and the other is about 6 feet. I wonder if they had different ordering numbers.

Re: TEK 2432A intermittent behaviour

Bob Koller
 

The first thing always on these is to replace ALL the small electrolytic caps on the power supply board. These are 1980's scopes, and all the caps are past it.
Get the power supply working right, then see what, if any, problems there are.

Also, note that you cannot operate the chassis out of the cabinet for more that a few minutes! The hybrids will overheat and be damaged. You must use a good fan directed at the bottom of the borad.

Re: Tek 555 Dual Beam power supply cable/connectors

Dave Brown
 

Matt,
Correct me if I am wrong, but I think you need a 16 way plug and socket from the Amphenol Blue Ribbon series- as well as -ideally- the locking shrouds to cover their backsides.
I have an NOS plug and socket- still in original amphenol plastic bags- plus a couple of used but they look OK, NON - locking shrouds, can send a photo if you are interested.
DaveB, NZ

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Matt Russell
Sent: Friday, February 01, 2019 17:57
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tek 555 Dual Beam power supply cable/connectors

no I have not found one yet. I am all ears

Re: TEK 2432A intermittent behaviour

Marco Re
 

Thanks Bob, I experienced also that the problem happens after some minutes of regular work. Anyway I will follow your suggestion !
Many thanks Bob

Re: Tek 555 Dual Beam power supply cable/connectors

Matt Russell
 

I have all the connecter and ends as shown in the hook up wire/home made one which I would entertain but, I'm concerned about arcing across terminals if they were bumped (where they are. non-locking)
I was going to order Amphenol connecters that are mil spec #20 round locking 18 pin connecters.......I am obsessive about small things when it has to do with such a fine instrument as these are, but if I must buy something that is going to cost $100 for a cable I will spend the money on mil spec and make mine unique.

Re: Anyone have a Tek 555 interconnection cable for sale

Matt Russell
 

I am happy to pay you. I am stressing about having to do anything other then what is in the units design! I really want to get this thing up and running and would be very grateful if you indeed have one that you can send my way! Thank you for your time and help with this mater

Tektronix 575 recalibration

Dan Cordova
 

Greetings- I am going through the recalibration per the 575 manual. My Curve Tracer is serial number 001974. Everything is going well, until I get to step #10 Phase A, Phase B and Geometry. I cannot get the display as shown in Fig. 5-1 and Fig. 5-2. The switches are set per the manual, the binding posts C and E on the Transistor B side of the test panel are shorted together. I'm assuming that means to connect C and E together with a wire? Is that what I'm doing wrong? All I get is one line showing on the CRT.

I can still put two transistors in the test panel and get a nice set of curves showing on the CRT, both test positions, but want to make sure the machine is somewhat accurate.

Thanks,

Dan

Re: Tektronix 575 recalibration

David Holland
 

Yes, they mean to short C & E with a bit of wire. Horizontal line?
Vertical Line?

As a WAG, I suppose it could be more leaking paper caps? C102,
C105, C108, C122, C128, C130 are all 400V 0.047uF PTM's and in the
phase end of the step circuitry... There's nice waveforms on the
schematic, if you've a scope handy...

I suppose one or more of the potentiometers could be bad as well. I
once found R139 (volts/step adjustment 50K 2W WW) bad in one of
mine...(Caused a failure during Step #11). Bad transistor select
switch, and "B" isn't selected like you think it is - You should be
able to that test with side A as well.

I think the tester would work with out the phase circuitry working, it
just wouldn't work as well.

David


On Fri, Feb 1, 2019 at 7:47 PM Dan Cordova via Groups.Io
<danny_cordov=yahoo.com@groups.io> wrote:

Greetings- I am going through the recalibration per the 575 manual. My Curve Tracer is serial number 001974. Everything is going well, until I get to step #10 Phase A, Phase B and Geometry. I cannot get the display as shown in Fig. 5-1 and Fig. 5-2. The switches are set per the manual, the binding posts C and E on the Transistor B side of the test panel are shorted together. I'm assuming that means to connect C and E together with a wire? Is that what I'm doing wrong? All I get is one line showing on the CRT.

I can still put two transistors in the test panel and get a nice set of curves showing on the CRT, both test positions, but want to make sure the machine is somewhat accurate.

Thanks,

Dan


Re: Tektronix 575 recalibration

John Williams
 

I have a 575 that I hoped to fix someday, but I doubt that. So if you need a part let me know. I would only want postage.

Re: Tektronix 575 recalibration

Dan Cordova
 

Hi David,
It's vertical line that I'm seeing.
Am I supposed to be seeing these waveforms on the curve tracer CRT or on an O-scope? Haha, the manual isn't real clear about this, but I was interrupted several times today while trying to do this. Where should I connect the o-scope to see the waveforms?
I will read the manual thoroughly this weekend...
Also, I will change out all the paper caps. Fortunately, I have a ton of 0.047 uF, 600V bipolar caps. 
Now I understand why these Tektronix 'scopes are so popular- well documented and designed, they are made to last a long time! Most importantly, designed so that you can work on them. This thing is about as old as me!
Thank you,
Dan






From: David Holland <david.w.holland@...>
To: TekScopes@groups.io
Sent: Friday, February 1, 2019 6:13 PM
Subject: Re: [TekScopes] Tektronix 575 recalibration

Yes, they mean to short C & E with a bit of wire.  Horizontal line?
Vertical Line?

As a WAG, I suppose it could be more leaking paper caps?    C102,
C105, C108, C122, C128, C130 are all 400V 0.047uF PTM's and in the
phase end of the step circuitry...  There's nice waveforms on the
schematic, if you've a scope handy...

I suppose one or more of the potentiometers could be bad as well.  I
once found R139 (volts/step adjustment 50K 2W WW) bad in one of
mine...(Caused a failure during Step #11).    Bad transistor select
switch, and "B" isn't selected like you think it is - You should be
able to that test with side A as well.

I think the tester would work with out the phase circuitry working, it
just wouldn't work as well.

David


On Fri, Feb 1, 2019 at 7:47 PM Dan Cordova via Groups.Io
<danny_cordov=yahoo.com@groups.io> wrote:

Greetings- I am going through the recalibration per the 575 manual. My Curve Tracer is serial number 001974. Everything is going well, until I get to step #10 Phase A, Phase B and Geometry. I cannot get the display as shown in Fig. 5-1 and Fig. 5-2.  The switches are set per the manual, the binding posts C and E on the Transistor B side of the test panel are shorted together.  I'm assuming that means to connect C and E together with a wire? Is that what I'm doing wrong?  All I get is one line showing on the CRT.

I can still put two transistors in the test panel and get a nice set of curves showing on the CRT, both test positions, but want to make sure the machine is somewhat accurate.

Thanks,

Dan


Re: Tektronix 575 recalibration

Dan Cordova
 

Thank you, Books. I will keep that in mind...
My nickname in junior high was "Books" because I was always reading...

From: "books4you@..." <books4you@...>
To: TekScopes@groups.io
Sent: Friday, February 1, 2019 6:58 PM
Subject: Re: [TekScopes] Tektronix 575 recalibration

I have a 575 that I hoped to fix someday, but I doubt that. So if you need a part let me know. I would only want postage.

Re: New member

Leon Robinson
 

I hope the floor is stout enough.

Leon Robinson    K5JLR

Political Correctness is a Political Disease.
Politicians and Diapers should be changed
often and for the same reasons.

On Thursday, January 31, 2019, 6:55:09 PM CST, books4you@... <books4you@...> wrote:

Hi. My name is John. I have just joined so I would like to observe for a bit to get the hang of being on here. My interests are 500 series restoration and repair. My google photo sight is

https://photos.app.goo.gl/vWHUhwHc74o7ed7Q9

I am looking forward to being a member of this group..

Re: Tektronix 575 recalibration

David Holland
 

Fig 5-1, and 5-2 are viewed on the 575 CRT. Any other wave forms
are displayed on the scope. See the Step Generator Schematic,
they're kind of hard to read, depending on your manual, but should
give you some idea if you're getting the right inputs to the mixer.

As I recall, the front panel STEPS/FAMILY control will adjust the
number of vertical "things" you see on the screen. Though I do not
recall it being able to go all the way down to a single one. I
suppose it could be possible if the MIN and MAX number of steps
controls are wildly out of whack/open/bad/etc...(See R182, and R194)
They're internal controls. They don't get adjusted till Step #13.

But, if you've more PTMs in there, replacing them is where I'd start...

On Fri, Feb 1, 2019 at 11:06 PM Dan Cordova via Groups.Io
<danny_cordov=yahoo.com@groups.io> wrote:

Hi David,
It's vertical line that I'm seeing.
Am I supposed to be seeing these waveforms on the curve tracer CRT or on an O-scope? Haha, the manual isn't real clear about this, but I was interrupted several times today while trying to do this. Where should I connect the o-scope to see the waveforms?
I will read the manual thoroughly this weekend...
Also, I will change out all the paper caps. Fortunately, I have a ton of 0.047 uF, 600V bipolar caps.
Now I understand why these Tektronix 'scopes are so popular- well documented and designed, they are made to last a long time! Most importantly, designed so that you can work on them. This thing is about as old as me!
Thank you,
Dan






From: David Holland <david.w.holland@...>
To: TekScopes@groups.io
Sent: Friday, February 1, 2019 6:13 PM
Subject: Re: [TekScopes] Tektronix 575 recalibration

Yes, they mean to short C & E with a bit of wire. Horizontal line?
Vertical Line?

As a WAG, I suppose it could be more leaking paper caps? C102,
C105, C108, C122, C128, C130 are all 400V 0.047uF PTM's and in the
phase end of the step circuitry... There's nice waveforms on the
schematic, if you've a scope handy...

I suppose one or more of the potentiometers could be bad as well. I
once found R139 (volts/step adjustment 50K 2W WW) bad in one of
mine...(Caused a failure during Step #11). Bad transistor select
switch, and "B" isn't selected like you think it is - You should be
able to that test with side A as well.

I think the tester would work with out the phase circuitry working, it
just wouldn't work as well.

David


On Fri, Feb 1, 2019 at 7:47 PM Dan Cordova via Groups.Io
<danny_cordov=yahoo.com@groups.io> wrote:

Greetings- I am going through the recalibration per the 575 manual. My Curve Tracer is serial number 001974. Everything is going well, until I get to step #10 Phase A, Phase B and Geometry. I cannot get the display as shown in Fig. 5-1 and Fig. 5-2. The switches are set per the manual, the binding posts C and E on the Transistor B side of the test panel are shorted together. I'm assuming that means to connect C and E together with a wire? Is that what I'm doing wrong? All I get is one line showing on the CRT.

I can still put two transistors in the test panel and get a nice set of curves showing on the CRT, both test positions, but want to make sure the machine is somewhat accurate.

Thanks,

Dan







Re: Anyone have a Tek 555 interconnection cable for sale

widgethunter
 

Matt;
Have found a standard 'short' interconnect.
No part numbers so I need to verify this is for 555, not 551.
Possible Tek only built one cable for both...just not sure.
Let me know if I should dig deeper or if you're going with the connectors you were offered.
Thx.
Bernie Schroder

-----Original Message-----
From: Matt Russell <statesomattr@...>
To: TekScopes <TekScopes@groups.io>
Sent: Fri, Feb 1, 2019 2:47 pm
Subject: Re: [TekScopes] Anyone have a Tek 555 interconnection cable for sale

I am happy to pay you. I am stressing about having to do anything other then what is in the units design! I really want to get this thing up and running and would be very grateful if you indeed have one that you can send my way! Thank you for your time  and help with this mater

Re: Tek 555 Dual Beam power supply cable/connectors

widgethunter
 

Thx.

-----Original Message-----
From: bobkrassa <bob@...>
To: TekScopes <TekScopes@groups.io>
Sent: Fri, Feb 1, 2019 6:38 am
Subject: Re: [TekScopes] Tek 555 Dual Beam power supply cable/connectors

The cables for the 551 and the 555 are the same.  They are listed as inter-unit cable 012-032 for both units in the 1965 catalog and as inter-unit cable 012-0032-01 in the 1967 catalog.

Re: Anyone have a Tek 555 interconnection cable for sale

John Williams
 

551 555 same cable.

Lots of literature on website

John Williams
 

Everyone else has no doubt seen this, but I will post it anyway. I could’ve believe all of the tektronix literature, catalogs, etc etc. Will keep me in reading for many months.

http://bee.mif.pg.gda.pl/ciasteczkowypotwor/Tek/publikacje/

Re: Lots of literature on website

Dan Cordova
 

Yes, this is nice! Like a treasure...it's bookmarked now.
Thank you, I had not seen this!
Dan

On Saturday, February 2, 2019, 4:17:27 PM PST, books4you@... <books4you@...> wrote:

Everyone else has no doubt seen this, but I will post it anyway. I could’ve believe all of the tektronix literature, catalogs, etc etc. Will keep me in reading for many months.

http://bee.mif.pg.gda.pl/ciasteczkowypotwor/Tek/publikacje/

Re: Lots of literature on website

ArtekManuals
 

Who ever you are ( you didnt sign your post) and I dont recall ever having seen a post from you on the group before.
 You have an interesting email address. Are you in anyway connected to owner of that web site? I have been trying to get a hold of the owner for years

Dave
manuals@...

On 2/2/2019 7:17 PM, books4you@... wrote:
Everyone else has no doubt seen this, but I will post it anyway. I could’ve believe all of the tektronix literature, catalogs, etc etc. Will keep me in reading for many months.

http://bee.mif.pg.gda.pl/ciasteczkowypotwor/Tek/publikacje/


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