Date   

Re: TEK 466 focus potentiometer

gordonhale54
 

Would you happen to know why a Tek TAS250 lost its digital cursers. Thanks

Gordon Hale
Grand Prairie, Texas
Endeavor to Persevere


-----Original Message-----
From: cam55orange
To: TekScopes@...
Sent: Sun, Jul 3, 2011 1:50 pm
Subject: [TekScopes] Re: TEK 466 focus potentiometer

 

Doug,

Life it tough on these knobs. If the blue case stuck out over the front of the instrument about an inch we would not have this problem.

I have a couple of sources:

Jim Reese jreese@7010@...

Sphere Research http://www.sphere.bc.ca/

Good luck.

Bill

--- In TekScopes@..., Douglas Ho wrote:
>
>
> Hi bill,
> I have a couple of 465 scopes need Knobs. Can you recommend the good source for me?
> Thanks,
> Douglas Ho
>
> To: TekScopes@...
> From: bwebb@...
> Date: Sat, 2 Jul 2011 15:43:03 +0000
> Subject: [TekScopes] TEK 466 focus potentiometer
>
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> I recently purchased a very used Tektronix 466 scope. It had a few broken knobs. I have been able to purchase replacements. So far it works great. I have discovered one problem. The focus potentiometer is stuck. It will not budge with vise grips. Fortunately it is frozen in the 'focused' position. I am wondering if the wiper is welded itself in this postion. Is this a know problem? Is there a source for a replacement focus potentiometer?
>
>
>
> Since the trace is in focus this is not a big problem, but it is annoying.
>
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> Thanks - bill
>


Re: Tek P7001 Processor

gordonhale54
 

Know anything as to why my TEK TAS250 does not have the cursers? Thanks

Gordon Hale
Grand Prairie, Texas
Endeavor to Persevere


-----Original Message-----
From: d.seiter@...
To: TekScopes@...
Sent: Mon, Jul 4, 2011 4:37 am
Subject: Re: [TekScopes] Re: Tek P7001 Processor

 
I've never seen one, but I've never looked either.  Maybe it's time to think about it.

Dave


From: "g_kupka" <ghm1@...>
To: TekScopes@...
Sent: Sunday, July 3, 2011 4:09:58 AM
Subject: [TekScopes] Re: Tek P7001 Processor

 


I am looking for an extension board for the P7001

Gerhard
--- In TekScopes@..., d.seiter@... wrote:
>
> I was on vacation until yesterday, but my P7001 is still mothballed.
>
>
> Dave
>


Re: D15? Pacific Measurements 1038 Skalar Network Analyzer

gordonhale54
 

Does anyone know anything regarding the Tek TAS250 scope. Mine does not have the digital cursers available.
Thanks

Gordon Hale
Grand Prairie, Texas
Endeavor to Persevere


-----Original Message-----
From: magnustoelle
To: TekScopes@...
Sent: Mon, Jul 4, 2011 8:28 am
Subject: [TekScopes] Re: D15? Pacific Measurements 1038 Skalar Network Analyzer

 
Hi Michael,

yes, well spotted, some other companies were also using Tektronix' 5103N/D1x display sections. Side comment: I always found the Tek 57x curve tracer's display look at least partially very similar, but I need others to confirm...

The hint is that the single and dual beam as well as the storage and the non-storage versions (D1x) all have a lot of similarities.
The strange changes in nomenclature (the 5103N and D1x became 511x) has been discussed here many times, and Christian provides a very useful summary: http://www.i9t.net/5000_scopes.html#SlowMainframes 

You can start by downloading the D10 display section manual here: http://bama.edebris.com/manuals/tek/5110/ 

If you are not happy with the above manual , i.e. lack of details or specifics on your D15, then I am happy to recommend Artekmedia again.http://artekmed.startlogic.com/page2.html 

I am not affiliated, but Dave simply sells excellent scans for little money and I was always very pleased with their service. He also is a very friendly chap and group member here.

Cheers,

Magnus


Re: Tektronix 2215 problem

gordonhale54
 

You wouldn't happen to know anything about the Tek TAS250 would you. I bought mine from ebay and it does not have the digital readouts available.  Thanks

Gordon Hale
Grand Prairie, Texas
Endeavor to Persevere


-----Original Message-----
From: Chris Moore
To: TekScopes@...
Sent: Mon, Jul 4, 2011 7:54 am
Subject: Re: [TekScopes] Tektronix 2215 problem

 
Daniel,
 
I have limited experience with troubleshooting, too. But from what I've seen so far, the service manual for tek scopes are very informative. They give you a heads up as to where to start troubleshooting and what to look for. They also help you source most parts in the unit by telling you what each part is and where it is located in the unit.
 
Chris

--- On Sun, 7/3/11, Daniel <timon4life@...> wrote:

From: Daniel <timon4life@...>
Subject: [TekScopes] Tektronix 2215 problem
To: TekScopes@...
Date: Sunday, July 3, 2011, 11:53 PM

 
I recently bought this 'scope from ebay and I got a good deal on it because it doesn't work. there seems to be some problem with the PSU it just makes a high pitched whine and I get no trace on the screen. I posted a video on youtube so you can see for yourselves what it's doing. what I want to know is what I should check for, where I can get replacement parts, or, where I can send this to get it fixed. I know intermediate electronics but i'm not great at troubleshooting. I'm more into repairing tube radios. that's kind of the reason I bough the scope. anyway hope someone can help me!

http://www.youtube.com/watch?v=GFPTLrw9enk


Re: Battery for spectrum analyzer

Stefan Heinzmann <stefan_heinzmann@yahoo.com>
 

That's what I did now. The shielding was necessary, as I used a rather thick CR2450 cell, which is about the largest thing that can be fitted. It has enough capacity to outlast the rest of the instrument, I guess.

Works, sorted, thanks for the tip!

Cheers
Stefan

--- In TekScopes@..., "John Miles" <jmiles@...> wrote:

I've always epoxied a standard CR2032 or CR2016 coin cell holder onto the
board, depending on what's in my parts drawer at the time I needed it.
Check to make sure the spring strip for the positive electrode isn't in
danger of brushing against the shield partition when you reinstall the
board... if so, you can stick some Kapton or similar tape to the shield
wall.

-- john, KE5FX

-----Original Message-----
From: TekScopes@...
[mailto:TekScopes@...] On Behalf Of stefan_heinzmann
Sent: Monday, June 27, 2011 7:20 AM
To: TekScopes@...
Subject: [TekScopes] Battery for spectrum analyzer

Hi all,

are there any sources for a lithium battery that fits into a 494 or 494A
type
spectrum analyzer, or is it necessary to try to fit in something similar?

Cheers
Stefan




------------------------------------

Yahoo! Groups Links



155-0012 Z Axis Logic Tek IC - any sellers?

magnustoelle
 

Hello,

I found some time to continue with my work on my 7704A, and found that the above Tek custom IC 155-0012-00 "Z Axis Logic" seems defective. It loads the +15V and +5V supplies quite heavily.

I know that there are some available at sphere, but I am trying to avoid the delays and shipping costs. Any luck in this group - any offerings would be greatly appreciated.

I just *need* to get this 7704A-beauty back to life, and you know how that feels, I suppose. Please contact me off-line, if you have any 155-0012s to offer.

Thanks very much!

Cheers,

Magnus


Re: D15? Pacific Measurements 1038 Skalar Network Analyzer

magnustoelle
 

Hi Michael,

yes, well spotted, some other companies were also using Tektronix' 5103N/D1x display sections. Side comment: I always found the Tek 57x curve tracer's display look at least partially very similar, but I need others to confirm...

The hint is that the single and dual beam as well as the storage and the non-storage versions (D1x) all have a lot of similarities.
The strange changes in nomenclature (the 5103N and D1x became 511x) has been discussed here many times, and Christian provides a very useful summary: http://www.i9t.net/5000_scopes.html#SlowMainframes 

You can start by downloading the D10 display section manual here: http://bama.edebris.com/manuals/tek/5110/ 

If you are not happy with the above manual , i.e. lack of details or specifics on your D15, then I am happy to recommend Artekmedia again.http://artekmed.startlogic.com/page2.html 

I am not affiliated, but Dave simply sells excellent scans for little money and I was always very pleased with their service. He also is a very friendly chap and group member here.

Cheers,

Magnus


Re: Tektronix 2215 problem

Chris Moore <chris2phermoore@...>
 

Daniel,
 
I have limited experience with troubleshooting, too. But from what I've seen so far, the service manual for tek scopes are very informative. They give you a heads up as to where to start troubleshooting and what to look for. They also help you source most parts in the unit by telling you what each part is and where it is located in the unit.
 
Chris


--- On Sun, 7/3/11, Daniel wrote:

From: Daniel
Subject: [TekScopes] Tektronix 2215 problem
To: TekScopes@...
Date: Sunday, July 3, 2011, 11:53 PM

 
I recently bought this 'scope from ebay and I got a good deal on it because it doesn't work. there seems to be some problem with the PSU it just makes a high pitched whine and I get no trace on the screen. I posted a video on youtube so you can see for yourselves what it's doing. what I want to know is what I should check for, where I can get replacement parts, or, where I can send this to get it fixed. I know intermediate electronics but i'm not great at troubleshooting. I'm more into repairing tube radios. that's kind of the reason I bough the scope. anyway hope someone can help me!

http://www.youtube.com/watch?v=GFPTLrw9enk


Tektronix 7854 + plug-ins + waveform calculator on cart for $100

 

No affiliation with the seller. Item north of Boston.
http://boston.craigslist.org/gbs/ele/2475409298.html

Jay


Re: Tek P7001 Processor

d.seiter@...
 

I've never seen one, but I've never looked either.  Maybe it's time to think about it.

Dave



From: "g_kupka"
To: TekScopes@...
Sent: Sunday, July 3, 2011 4:09:58 AM
Subject: [TekScopes] Re: Tek P7001 Processor

 



I am looking for an extension board for the P7001

Gerhard
--- In TekScopes@..., d.seiter@... wrote:
>
> I was on vacation until yesterday, but my P7001 is still mothballed.
>
>
> Dave
>


Re: Tektronix 2215 problem

Greg Bowne <gbowne1@...>
 

As far as I know of, the best place I have been able to find.. around here anyhow.. is http://www.tekscopeservice.com/
 
Tek Scope Service
Dan Shores
3831 SE 92nd Ave.
Portland, OR 97266
 
Greg


From: Daniel
To: TekScopes@...
Sent: Sun, July 3, 2011 4:53:44 PM
Subject: [TekScopes] Tektronix 2215 problem

 

I recently bought this 'scope from ebay and I got a good deal on it because it doesn't work. there seems to be some problem with the PSU it just makes a high pitched whine and I get no trace on the screen. I posted a video on youtube so you can see for yourselves what it's doing. what I want to know is what I should check for, where I can get replacement parts, or, where I can send this to get it fixed. I know intermediate electronics but i'm not great at troubleshooting. I'm more into repairing tube radios. that's kind of the reason I bough the scope. anyway hope someone can help me!

http://www.youtube.com/watch?v=GFPTLrw9enk


Tektronix 2215 problem

Daniel
 

I recently bought this 'scope from ebay and I got a good deal on it because it doesn't work. there seems to be some problem with the PSU it just makes a high pitched whine and I get no trace on the screen. I posted a video on youtube so you can see for yourselves what it's doing. what I want to know is what I should check for, where I can get replacement parts, or, where I can send this to get it fixed. I know intermediate electronics but i'm not great at troubleshooting. I'm more into repairing tube radios. that's kind of the reason I bough the scope. anyway hope someone can help me!

http://www.youtube.com/watch?v=GFPTLrw9enk


Re: Best electrolytics for recapping (2235)?

Lowell
 

Not an answer but, the web site "badcaps.com" has a ton of people who seem to know an awful lot about recaping, cap types and manufactures. I've useed them extensively when deciding about a cap type to use.
NOTE: They're mostly about recapping motherboards and the high ripple requirements of the VR power supply. However, there's a lot of info about just general circuit recapping.
The general jist of it is that one should know what the specific circuit requires; high ripple capability is NOT always the correct answer (too low of a ESR).
Take a look, you may be amazed at all the knowledge and friendly advice available from them.
P.S. I'm only a user of the site.

Some years ago Panasonic had low impedance series that leaked about >a year or two in service. They dis-continued this series and every >company that used them had a product liability problem.

Since then, I have stopped using Panasonic capacitors in any >>designs.. Due to the easy availability of Panasonic parts at >>Digi-key, they have become common, but they are not always the >>ideal choice. This is a marketing strategy that has worked well for >>Panasonic.
My perfered has been United Chemi-Con, Nichicon or even CDE.
The specific type of 'lytic that should be used depends on the >>it's specific job in circuit. There is not real one 'lytic does >>all. Be aware of life, temperature, specified temperature and other >>ratings before installing any replacement 'lytic.

Bernice 
--- On Sat, 7/2/11, ab1jx <alancorey@...> wrote:

From: ab1jx <alancorey@...>
I've got some 11 khz ripple in the vertical section of my 2235 so I was thinking about recapping it. I saw Rubycon mentioned in another thread, I was thinking Panasonic EEU line or maybe Nichicon. Is there one all-around best choice or does it depend on where it is in the scope?



Alan


Re: ROM for 7854

dinosadamopoulos
 

Thank you for your advice, but I am waiting for my membership approval to the TekScopeArc2.
I found some ROM chips (MCM68764 and MCM68766) but I don¢t know which one is the most appropriate. So I am waiting about your solution. I hope to find a way to fix the problem. In the mean time I read all the links about similar problems of the 7854.
Thanks again Dinos.


Re: TEK 466 focus potentiometer

cam55orange
 

Doug,

Life it tough on these knobs. If the blue case stuck out over the front of the instrument about an inch we would not have this problem.

I have a couple of sources:

Jim Reese jreese@7010@...

Sphere Research http://www.sphere.bc.ca/

Good luck.

Bill

--- In TekScopes@..., Douglas Ho <dho695@...> wrote:


Hi bill,
I have a couple of 465 scopes need Knobs. Can you recommend the good source for me?
Thanks,
Douglas Ho

To: TekScopes@...
From: bwebb@...
Date: Sat, 2 Jul 2011 15:43:03 +0000
Subject: [TekScopes] TEK 466 focus potentiometer




























I recently purchased a very used Tektronix 466 scope. It had a few broken knobs. I have been able to purchase replacements. So far it works great. I have discovered one problem. The focus potentiometer is stuck. It will not budge with vise grips. Fortunately it is frozen in the 'focused' position. I am wondering if the wiper is welded itself in this postion. Is this a know problem? Is there a source for a replacement focus potentiometer?



Since the trace is in focus this is not a big problem, but it is annoying.



Thanks - bill


Re: No HV on tek 465

magaudiolab
 

Thank you so much Mendel!
I am still checking HV (hoping to find my good old HV probe ASAP. I had one in my lab but I have not used it for so long... God knows where is it now!).
I will use 2CL73 (easy to find) which seems a valid alternative, if it should work I will let to know.

Valerio

--- In TekScopes@..., Mendel Pearl <mypearl@...> wrote:

I can send you one for free, but I am in Holland. I think it will fit a
standard letter so cost should be no issue.

Let me know if you want one.

Mendel


Re: No HV on tek 465

magaudiolab
 

--- In TekScopes@..., "Hakan H" <hahi@...> wrote:



--- In TekScopes@..., "magaudiolab" <v.maglietta@>
How did you determine it was open ? This diode (152-0409-00) has forward
drop of about 9 V at 1 mA so it can not be checked with a normal DMM.
/Håkan
Hi Håkan,
I did not use DMM at all, but a D-R series circuit (R being 22k so current max should never exceed 3mA) powered by a variable power supply (up to 60V).
Diode never showed any measurable conduction at all. If any, current is below .01uA.
Far way from 9V @ 1mA as you stated.
If it is not opened, it is likely to be a leaky diode.


Re: TEK 466 focus potentiometer

Angela(Eastman) Ho
 

Hi bill,

I have a couple of 465 scopes need Knobs.  Can you recommend the good source for me?

Thanks,

Douglas Ho


To: TekScopes@...
From: bwebb@...
Date: Sat, 2 Jul 2011 15:43:03 +0000
Subject: [TekScopes] TEK 466 focus potentiometer

 
I recently purchased a very used Tektronix 466 scope. It had a few broken knobs. I have been able to purchase replacements. So far it works great. I have discovered one problem. The focus potentiometer is stuck. It will not budge with vise grips. Fortunately it is frozen in the 'focused' position. I am wondering if the wiper is welded itself in this postion. Is this a know problem? Is there a source for a replacement focus potentiometer?

Since the trace is in focus this is not a big problem, but it is annoying.

Thanks - bill



Re: Problem calibration TEK 495P

Bob Koller <testtech@...>
 

The first thing I would check is the input attenuator. If you input, say, 0dbm from your generator, what is the on screen amplitude display? Is it close to the top of the screen with the input atten knob at 0db? Next, reduce the sig gen output in 10db steps and verify the steps with the 495 input atten knob. One of the first things to suspect is a damaged input attenuator, and /or damaged mixer. Of course, many other things can cause this, but these are suseptable to external input overload.


--- On Sun, 7/3/11, hh wrote:

From: hh
Subject: [TekScopes] Problem calibration TEK 495P
To: TekScopes@...
Date: Sunday, July 3, 2011, 2:19 AM

 

Hello,

i've this problem on my Tek 495P.
When i start the calibration routine,with the internal generator 100Hhz -20 dB,the routine fails because the processor says taht there is any signal calibrator is present.
I've checked the output signal at 100Mhz -20 Db and is ok.

So i've connected to rf input an external RF generator at 100MHZ and the test start only when i give a signal @ 100Mhz 0(zero) dB.
Seem to be a loss of gain.
What can i verify in the instruments for repair this loss of gain?

Thanks for Any help.

MAX


Re: No HV on tek 465

J. L. Trantham
 

Oh.
 
Joe
 
 

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of Hakan H
Sent: Sunday, July 03, 2011 4:05 AM
To: TekScopes@...
Subject: [TekScopes] Re: No HV on tek 465

 



--- In TekScopes@..., "J. L. Trantham" wrote:
>
> When I have tested similar diodes (although lower voltage, about 5 KV) I had
> to use a power supply through a resistor to drive the diode forward to see
> the current flow since my DMM couldn't produce enough forward voltage to
> 'turn on' the diode. Which DMM are you using?
>
> Joe
>
> -------
576 curve tracer
/Håkan

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