Date   

Re: Hakko FR-301 alternatives?

EJP
 

I will have a supply of ZD985 pump diaphragms in a few weeks. Please context me off list if interested.

EJP


Re: Tek TS-4353/U Distortion Analyzer and 500 series plug-ins

Egge Siert
 

Hi Dick,

The Operator's Manual of this TestSet is in the File Section of this Group.

https://groups.io/g/TekScopes/files/SG505%20MOD%20WR%20WQ%20AA501A%20MOD%20WQ.pdf

More interesting is the Service Manual of this TestSet. Seen only once on eBay (old Tucker Store).The AA501 MOD WQ has special Custom Made Filters in it.

Greetings,

Egge Siert


Re: 7000-series plug-in power tester

ycui7
 

Hi,

I the guy who is making a standalone power and signal adapter board. The original post is here https://groups.io/g/TekScopes/topic/74053244#168481

To answer your question, would be it worth doing? No it does not worth it at all for the trouble you go through, if the goal is only powering some plugins for troubleshooting.

I have three flexible extenders, and one rigid extender with more than 4 working 7000 mainframes (even more if count broken ones). But I am still spending a significant portion of my night to make it happen. Why? The value is not in the power adapter board itself. The value is in that you enable these plugins to be used on modern digital scope.

No company make 100 MHz differential amplifier anymore (at least not I am aware of) => 7L13
Low noise low frequency measurement with adjustable bandwidth=> 7A22
Hard to get capability for very low frequency spectrum analyzer for audio work => 7L5
Capability to get better noise floor than 1mVpp @ >100MHz => 7A26 is about 120uV level although not easily available due to limited 5mV/div max gain
Sampling plugins 7S12, 7S14
TDR => 7S12
Curve tracer 7CT1N

The above items are the ones that I can make sense of it. There may be other benefit to enable these plugins being used on digital scopes.


Re: Strange TM 500 plugin to ID

kim.herron@sbcglobal.net
 

I'm going to find it a HOME!

You can use it ??? Make me an offer I can't refuse!

On 6 Jul 2020 at 12:05, Michael W. Lynch via groups.io
wrote:

On Mon, Jul 6, 2020 at 01:07 PM, kim.herron@... wrote:


Hi Michael!!

Have you looked on Tekwiki? Is this it?

http://w140.com/tekwiki/wiki/067-0872-99 (
http://w140.com/tekwiki/wiki/067-0872-99 )

Another Member sent this to me.  Seems this is listed at
Tekwiki.  I put
this in a search
but it didn't come up.  Oh well, I learned something too!
Kim,

I did see that reply. I'm going to do some additional reading about
it.

Yes, TEKWiki is a wonderful source. I do not know why I did not
think to search for this item myself. I guess that I "assumed" that
you had done a search and failed to find it?

I was skimming through the manual and it seems to offer some help in
understanding Logic and Logic Analyzers.

What are you planning on doing with it?

--
Michael Lynch
Dardanelle, Arkansas


John Goller, K9UWA & Jean Goller, N9PXF
Antique Radio Restorations
k9uwa@...
Visit our Web Site at:
http://www.JohnJeanAntiqueRadio.com
4836 Ranch Road
Leo, IN 46765
USA
1-260-637-6426


Re: Strange TM 500 plugin to ID

Michael W. Lynch
 

On Mon, Jul 6, 2020 at 01:07 PM, kim.herron@... wrote:


Hi Michael!!

Have you looked on Tekwiki? Is this it?

http://w140.com/tekwiki/wiki/067-0872-99 (
http://w140.com/tekwiki/wiki/067-0872-99 )

Another Member sent this to me.  Seems this is listed at Tekwiki.  I put
this in a search
but it didn't come up.  Oh well, I learned something too!
Kim,

I did see that reply. I'm going to do some additional reading about it.

Yes, TEKWiki is a wonderful source. I do not know why I did not think to search for this item myself. I guess that I "assumed" that you had done a search and failed to find it?

I was skimming through the manual and it seems to offer some help in understanding Logic and Logic Analyzers.

What are you planning on doing with it?

--
Michael Lynch
Dardanelle, Arkansas


Re: S-52 only works with lowered +15 V power supply

unclebanjoman
 

I put 9090 ohm 1% and 22k ohm 5% resistors and now the circuit works perfectly.
Thanks Albert for your valuable suggestions!
Thanks also to Dan for exposing the latest changes to the schematic. I have written everything down, my manual is not so recent.

Max


Re: Strange TM 500 plugin to ID

kim.herron@sbcglobal.net
 

Hi Michael!!

Have you looked on Tekwiki? Is this it?

http://w140.com/tekwiki/wiki/067-0872-99 ( http://w140.com/tekwiki/wiki/067-0872-99 )

Another Member sent this to me.  Seems this is listed at Tekwiki.  I put this in a search
but it didn't come up.  Oh well, I learned something too!

If someone has a use for this thing, let me know.  It's an extra here and I'm running out of room.

On 6 Jul 2020 at 9:40, Michael W. Lynch via groups.io wrote:

  >I have a strange TM 500 plug in and I'm guessing that it's a sales
aid or a training
aid.  It is a 067-0872-99 Logic Demo Aid.  It has a Tektronix label
on the side of it that has a Field Engineers name
on it>

I do not see this as "inappropriate".

I am always anxious to learn about such obscure instruments.
Perhaps some of our more knowledgeable members can enlighten us
regarding this?



--
Michael Lynch
Dardanelle, Arkansas


Kim Herron  W8ZV
kim.herron@...
1-616-677-3706


Re: Strange TM 500 plugin to ID

Colin Herbert
 

Have you looked on Tekwiki? Is this it?

http://w140.com/tekwiki/wiki/067-0872-99

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of kim.herron@...
Sent: 06 July 2020 17:37
To: TekScopes@groups.io
Subject: [TekScopes] Strange TM 500 plugin to ID

HI All!

Hope this is not inappropriate! I have a strange TM 500 plug in and I'm guessing that it's a sales aid or a training
aid. It is a 067-0872-99 Logic Demo Aid. It has a Tektronix label on the side of it that has a Field Engineers name
on it. That name is Don Dalton. That is crossed out with pencil and the name is Dave Mc Cormick (I think) is
written in pencil above it. Anybody know anything about this, what it was used for, or any interest in it??

Thanks !!

Kim Herron W8ZV
kim.herron@...
1-616-677-3706


Re: Strange TM 500 plugin to ID

Michael W. Lynch
 

I have a strange TM 500 plug in and I'm guessing that it's a sales aid or a training
aid. It is a 067-0872-99 Logic Demo Aid. It has a Tektronix label on the side of it that has a Field Engineers name
on it>

I do not see this as "inappropriate".

I am always anxious to learn about such obscure instruments. Perhaps some of our more knowledgeable members can enlighten us regarding this?



--
Michael Lynch
Dardanelle, Arkansas


Strange TM 500 plugin to ID

kim.herron@sbcglobal.net
 

HI All!

Hope this is not inappropriate!  I have a strange TM 500 plug in and I'm guessing that it's a sales aid or a training
aid.  It is a 067-0872-99 Logic Demo Aid.  It has a Tektronix label on the side of it that has a Field Engineers name
on it.  That name is Don Dalton.  That is crossed out with pencil and the name is Dave Mc Cormick (I think) is
written in pencil above it.  Anybody know anything about this, what it was used for, or any interest in it??

Thanks !!

Kim Herron  W8ZV
kim.herron@...
1-616-677-3706


Re: 7000-series plug-in power tester

 

On Mon, Jul 6, 2020 at 10:48 AM, C G wrote:


Hope I did not be mislead some fellows out there...
That's what I was trying to avoid. With current 7000 mainframe prices, purchasing and modifying one especially for this purpose is an option as well.

Raymond


Re: 7000-series plug-in power tester

C G
 

After checking you're absolutely right. Learnt sth today!
In addition, rewiring may be tedious as even power supplies are not the same.
Hope I did not be mislead some fellows out there...

Le 6 juil. 2020 à 09:37, Raymond Domp Frank <@Raymond> a écrit :

On Mon, Jul 6, 2020 at 09:35 AM, C G wrote:


Find a used TM501. Test and/or recap the power supply. Remove the cover to see
properly what's going on inside and you're done!
TM501 - TekWiki < http://w140.com/tekwiki/wiki/TM501 >
Trying to keep this on track: A TM5xx backplane is not a 7000 backplane.

Raymond



Re: 7000-series plug-in power tester

 

On Mon, Jul 6, 2020 at 09:35 AM, C G wrote:


Find a used TM501. Test and/or recap the power supply. Remove the cover to see
properly what's going on inside and you're done!
TM501 - TekWiki < http://w140.com/tekwiki/wiki/TM501 >
Trying to keep this on track: A TM5xx backplane is not a 7000 backplane.

Raymond


Re: 7000-series plug-in power tester

C G
 

Find a used TM501. Test and/or recap the power supply. Remove the cover to see properly what's going on inside and you're done!
TM501 - TekWiki <http://w140.com/tekwiki/wiki/TM501>

Christian

Le 6 juil. 2020 à 07:46, Dave Seiter <d.seiter@...> a écrit :

Does a cable extender with a separate power output header specifically for testing count? Built into a dead plugin, the extender cable terminates into the card edge connector, while the power header is fixed on plugin face for stability.
-Dave
On Sunday, July 5, 2020, 07:44:25 PM PDT, stevenhorii <sonodocsch@...> wrote:

Bill,

Thanks - I saw that link and am interested. I'll go back and find it. My
thought was just for powering the plug-ins, but if you're going to do that,
why not use the inputs/outputs also.

Steve H

On Sun, Jul 5, 2020 at 10:41 PM Bill Perkins <sales@...> wrote:


A few weeks back a fellow posted just such a device, intended to
make
7K-series plug-ins outputs available for DSOs.

I don't have a link, sorry

Bill

Has anyone built a tester that would provide all the normal power to a
7000-series plug-in? Would it be worth doing? Maybe a way to do a quick
"smoke" test of plug-in not known to be good. Outside of the mainframe,
you'd have access to the power rails and test points.

is it worth it as opposed to putting the plug-in into a known good
mainframe?








Re: 7000-series plug-in power tester

Dave Seiter
 

Does a cable extender with a separate power output header specifically for testing count?  Built into a dead plugin, the extender cable terminates into the card edge connector, while the power header is fixed on plugin face for stability.
-Dave

On Sunday, July 5, 2020, 07:44:25 PM PDT, stevenhorii <sonodocsch@...> wrote:

Bill,

Thanks - I saw that link and am interested. I'll go back and find it. My
thought was just for powering the plug-ins, but if you're going to do that,
why not use the inputs/outputs also.

Steve H

On Sun, Jul 5, 2020 at 10:41 PM Bill Perkins <sales@...> wrote:


        A few weeks back a fellow posted just such a device, intended to
make
7K-series plug-ins outputs available for DSOs.

        I don't have a link, sorry

        Bill

Has anyone built a tester that would provide all the normal power to a
7000-series plug-in? Would it be worth doing? Maybe a way to do a quick
"smoke" test of plug-in not known to be good. Outside of the mainframe,
you'd have access to the power rails and test points.

is it worth it as opposed to putting the plug-in into a known good
mainframe?




Re: 7000-series plug-in power tester

stevenhorii
 

Bill,

Thanks - I saw that link and am interested. I'll go back and find it. My
thought was just for powering the plug-ins, but if you're going to do that,
why not use the inputs/outputs also.

Steve H

On Sun, Jul 5, 2020 at 10:41 PM Bill Perkins <sales@...> wrote:


A few weeks back a fellow posted just such a device, intended to
make
7K-series plug-ins outputs available for DSOs.

I don't have a link, sorry

Bill

Has anyone built a tester that would provide all the normal power to a
7000-series plug-in? Would it be worth doing? Maybe a way to do a quick
"smoke" test of plug-in not known to be good. Outside of the mainframe,
you'd have access to the power rails and test points.

is it worth it as opposed to putting the plug-in into a known good
mainframe?




Re: 7000-series plug-in power tester

Bill Perkins
 

A few weeks back a fellow posted just such a device, intended to make 7K-series plug-ins outputs available for DSOs.

I don't have a link, sorry

Bill

Has anyone built a tester that would provide all the normal power to a 7000-series plug-in? Would it be worth doing? Maybe a way to do a quick "smoke" test of plug-in not known to be good. Outside of the mainframe, you'd have access to the power rails and test points.
is it worth it as opposed to putting the plug-in into a known good mainframe?


7000-series plug-in power tester

stevenhorii
 

Has anyone built a tester that would provide all the normal power to a 7000-series plug-in? Would it be worth doing? Maybe a way to do a quick "smoke" test of plug-in not known to be good. Outside of the mainframe, you'd have access to the power rails and test points.

is it worth it as opposed to putting the plug-in into a known good mainframe?


Re: S-52 only works with lowered +15 V power supply

Albert Otten
 

Hi Max,

That must be a relief!
I think the protective function of Q32 is needed immediately after switching the scope to on, when the power supply lines come up (perhaps one after the other). Just a guess, the manual indeed pays no attention to Q32.

Albert


Re: S-52 only works with lowered +15 V power supply

unclebanjoman
 

Hi Albert,

Found the culprit.

The function of Q32 is not explained in the manual. Since you pointed toward Q32 and its "strange" function, just for curiosity I pulled it out.
Result: the pulse output is up and stable with positive supply in the range 13.5 - 15.5 V..
So I returned to the pcb. Q32 has a fixed bias established by R34 ((22k) and R35 (9.1k).
Measuring the two resistors, they give me 19k and 11 k respectively. So the bias point is so altered that with +15 V of positive supply Q32 is almost conducting.
Warming up, Q32 starts to conduct and pulls down the "E" signal...

I think the function of Q32 was to some kind of protection against excessive positive voltages. No other explanations are possible.

Max