Date   

Re: How many oscilloscopes a gentleman should have?

Don Black <donald_black@...>
 

Is there enough room for it in the doghouse?

Don Black.

On 11-Apr-13 11:01 AM, Don Lewis wrote:
 
I sold my wife's shoes on eBay and bought a scope :-)
 
 

From: Dave Daniel
To: TekScopes@...
Sent: Wednesday, April 10, 2013 6:41 PM
Subject: Re: [TekScopes] Re: How many oscilloscopes a gentleman should have?
 
Ah. See?

On 4/10/2013 5:28 PM, Bryce Schroeder wrote:
 
Well, one does usually need shoes to go to the store or buy new shoes, or to the cobbler to get them repaired.
On 10 April 2013 19:23, Dave Daniel <kc0wjn@...> wrote:
Well,maybe not. Are some of your shoes used to repair other shoes? DaveD
On 4/10/2013 5:06 PM, Veronica Merryfield wrote:
 
I guess I fail on this list - I have less scopes than shoes, but perhaps that's ok, this was about how many scopes a gentleman should have :)

Female shoes? Are there male shoes too? Do they come in pairs????

For the curious, I have three scopes, one currently working.

On 4/10/2013 3:53 PM, KeepIt SimpleStupid wrote:
>
> Let's pt scopes into perspective. Compare to the number of female shoes.



Tek 576 Curve Tracer Repair

c1ferrari
 

Hi all,


I bought a 576 from eBay with a Tektronix cal from Dallas which expired 01-DEC-10. Everything was going well and I was learning how to use the instrument...until today.

I was attempting to characterize 6C33C tubes when smoke began to emanate from the top array of ventilation ports on the machine's left side. Immediately, I attenuated the Variable Collector Supply and switched the machine off.

I did not observe any POP or other sound in connection with this event.

Now that I've recovered, somewhat, my equilibriium -- I'm writing the post to ask this august group if there is anyone, any resource in my neck of the woods -- San Diego, that can take a look at my beloved Tek 576 CT.

Please, let me know.


Very best regards,

Sam


Re: How many oscilloscopes a gentleman should have?

Don Lewis <dlewis11193@...>
 

I sold my wife's shoes on eBay and bought a scope :-)
 
 

From: Dave Daniel
To: TekScopes@...
Sent: Wednesday, April 10, 2013 6:41 PM
Subject: Re: [TekScopes] Re: How many oscilloscopes a gentleman should have?
 
Ah. See?

On 4/10/2013 5:28 PM, Bryce Schroeder wrote:
 
Well, one does usually need shoes to go to the store or buy new shoes, or to the cobbler to get them repaired.
On 10 April 2013 19:23, Dave Daniel <kc0wjn@...> wrote:
Well,maybe not. Are some of your shoes used to repair other shoes? DaveD
On 4/10/2013 5:06 PM, Veronica Merryfield wrote:
 
I guess I fail on this list - I have less scopes than shoes, but perhaps that's ok, this was about how many scopes a gentleman should have :)

Female shoes? Are there male shoes too? Do they come in pairs????

For the curious, I have three scopes, one currently working.

On 4/10/2013 3:53 PM, KeepIt SimpleStupid wrote:
>
> Let's pt scopes into perspective. Compare to the number of female shoes.


Re: How many oscilloscopes a gentleman should have?

Don Black <donald_black@...>
 

A dollar?

Don Black.

On 11-Apr-13 8:39 AM, Tom Miller wrote:
 

Is that like "how many quarters are in a football game?"
 
Tom
 
----- Original Message -----
Sent: Wednesday, April 10, 2013 6:35 PM
Subject: Re: [TekScopes] Re: How many oscilloscopes a gentleman should have?

 

So, when you get to 42, do you think you will be able to hook them up in such a way as to be able to figure out what the question is? If so, Mr. Adams could write a fifth (or would it be a sixth? I forget) volume for his trilogy.

DaveD

On 4/10/2013 4:00 PM, Dennis Tillman wrote:
 

Dave is right. The answer is 42.

I’m half way there and I still have 4 feet left between the top of the highest equipment stack in the room and the ceiling so I ought to have enough room for the other 21.

As long as I don’t run out of money or time I might actually make it to 42. Then I will be a very happy fella!

Dennis

From: Dave Daniel, Sent: Wednesday, April 10, 2013 12:38 PM
You meant 42, right?

On 4/10/2013 1:00 PM, Mike wrote: 

17. Obviously.




Re: How many oscilloscopes a gentleman should have?

Don Black <donald_black@...>
 

That would be a good feat since sadly Mr Adams has shuffled off this mortal coil.
But he's probably right the first time, if you collect more it's like breaking the speed of light, that blue glow may not be P31 but Chekhov radiation.
Perhaps I've boldly gone too far ;) .

Don Black.

On 11-Apr-13 8:35 AM, Dave Daniel wrote:
 

So, when you get to 42, do you think you will be able to hook them up in such a way as to be able to figure out what the question is? If so, Mr. Adams could write a fifth (or would it be a sixth? I forget) volume for his trilogy.

DaveD

On 4/10/2013 4:00 PM, Dennis Tillman wrote:
 

Dave is right. The answer is 42.

I’m half way there and I still have 4 feet left between the top of the highest equipment stack in the room and the ceiling so I ought to have enough room for the other 21.

As long as I don’t run out of money or time I might actually make it to 42. Then I will be a very happy fella!

Dennis

 

From: Dave Daniel, Sent: Wednesday, April 10, 2013 12:38 PM
You meant 42, right?

 

On 4/10/2013 1:00 PM, Mike wrote: 

17. Obviously.




Re: How many oscilloscopes a gentleman should have?

Brad Thompson <brad.thompson@...>
 

On 4/10/2013 8:48 PM, Veronica Merryfield wrote:
(b) hint, use the shoe to hit something hard...
<snip>

Hello--

In my first job as a technician, I was helping the
boss mark a series of holes in a chassis. He handed
me a hammer, positioned the center punch and then
said, "When I nod my head, hit it".

I did, and I lost my job....

73--

Brad AA1IP


Re: How many oscilloscopes a gentleman should have?

Dave Daniel
 

Good point.

On 4/10/2013 6:48 PM, Veronica Merryfield wrote:
(b) hint, use the shoe to hit something hard that is held against what you need to hit. Had to do it on a couple of occasions.

Bandage shoe made from tape measure tape, although the trick will be to keep it in place :)


On 2013-04-10, at 4:46 PM, Dave Daniel <kc0wjn@gmail.com> wrote:

I don't recall. Probably, but it would have been against my
philosophical outlook on things.Plus, most of my shoes wouldn't work
very well as a hammer. I rarely find myself (a) needing a hammer and
(b) needing it while wearing shoes with heels hard enough to use as one.
Now, I've used a tape measure for a hammer many times, but tape measures
are hard to put on your feet.


On 4/10/2013 5:41 PM, Veronica Merryfield wrote:
You never used a shoe as a hammer?

On 2013-04-10, at 4:28 PM, Bryce Schroeder <bryce.schroeder@gmail.com> wrote:

Well, one does usually need shoes to go to the store or buy new shoes, or to the cobbler to get them repaired.


On 10 April 2013 19:23, Dave Daniel <kc0wjn@gmail.com> wrote:


Well,maybe not.

Are some of your shoes used to repair other shoes?

DaveD



On 4/10/2013 5:06 PM, Veronica Merryfield wrote:
I guess I fail on this list - I have less scopes than shoes, but perhaps that's ok, this was about how many scopes a gentleman should have :)

Female shoes? Are there male shoes too? Do they come in pairs????

For the curious, I have three scopes, one currently working.

On 4/10/2013 3:53 PM, KeepIt SimpleStupid wrote:
Let's pt scopes into perspective. Compare to the number of female shoes.


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Re: How many oscilloscopes a gentleman should have?

Veronica Merryfield
 

(b) hint, use the shoe to hit something hard that is held against what you need to hit. Had to do it on a couple of occasions.

Bandage shoe made from tape measure tape, although the trick will be to keep it in place :)

On 2013-04-10, at 4:46 PM, Dave Daniel <kc0wjn@gmail.com> wrote:

I don't recall. Probably, but it would have been against my
philosophical outlook on things.Plus, most of my shoes wouldn't work
very well as a hammer. I rarely find myself (a) needing a hammer and
(b) needing it while wearing shoes with heels hard enough to use as one.
Now, I've used a tape measure for a hammer many times, but tape measures
are hard to put on your feet.


On 4/10/2013 5:41 PM, Veronica Merryfield wrote:
You never used a shoe as a hammer?

On 2013-04-10, at 4:28 PM, Bryce Schroeder <bryce.schroeder@gmail.com> wrote:

Well, one does usually need shoes to go to the store or buy new shoes, or to the cobbler to get them repaired.


On 10 April 2013 19:23, Dave Daniel <kc0wjn@gmail.com> wrote:


Well,maybe not.

Are some of your shoes used to repair other shoes?

DaveD



On 4/10/2013 5:06 PM, Veronica Merryfield wrote:

I guess I fail on this list - I have less scopes than shoes, but perhaps that's ok, this was about how many scopes a gentleman should have :)

Female shoes? Are there male shoes too? Do they come in pairs????

For the curious, I have three scopes, one currently working.

On 4/10/2013 3:53 PM, KeepIt SimpleStupid wrote:
Let's pt scopes into perspective. Compare to the number of female shoes.




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

Yahoo! Groups Links




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

Yahoo! Groups Links




Re: TEK 532 --

Don Black <donald_black@...>
 

It's always good to remember the basics. If you don't have a second scope, measuring the circuit DC voltages will often point to the problem area.

Don Black.

On 11-Apr-13 6:30 AM, Steve wrote:
 

--- In TekScopes@..., David Sligar wrote:
>
> Hello, Group --
>
> As possibly many new members do, my first post is a plea for help.  Once my very nice 532 is working again, I might decide that I prefer "reliable" to "elegant" -- and trade this one in for something a little newer. 
>
>
> I've been using this scope on a daily basis for about a month. On Friday morning I tuned it on and suddenly -- no sweep.  I've been going through the beast as carefully
> as I can, looking for the bug.
> Tubes all check good, no visible damage / exceptions, "all" voltages measure
> correctly.  I suspect one might need a (working) scope to figure out
> where the sweep waveform disappears.  I decided I'd try running my
> function generator as external sweep -- it worked, so that says at least
> the horiz. amp is OK. I've now spent a couple of days
> and I'm not sure I'll be able to find what's wrong.
>
> Amazing how helpless we are without tools! I hope one or more of you will be able to suggest where I should look.
>
> Thanks very much,
> David Sligar
> Grants Pass, OR

David,

A second scope would be very helpful, but you may be able to do some things without it. Selecting a very slow sweep speed (1 div/sec) would allow you so see the sawtooth on a DMM.

First you need to isolate the main area not working. It could be at least three – trigger, timebase, or blanking. Turning the Trigger Stability control to the far right should force the scope to free run. This does not isolate the trigger circuit however. It only biases the multivibrator in a way to have it reset when the sweep length comparator trips at the end of the sweep.

With another scope, you can trace all of the trigger circuit fairly easily. I usually use line trigger mode when doing this, as I know this gives a reliable signal, eliminating the possibility of a problem in the trigger pickoff circuit in the plug-in. Trace the signal through the comparator(V308), and verify the Trigger level control moves the grid voltage around (pin 9 for all + polarity settings, pin 2 for all – mode positions).

I was hoping to disable the unblanking pulse to rule that out, but I don't see a way to do that simply by pulling tube, as the signal is generated in a dual triode (V430B) that is shared with the trigger multivibrator. Unfortunately, the AC coupling to differentiate the pulse occurs before these tube stages, so there is no place you can easily short to ground or a supply to get a stable DC bias voltage.

If the trigger is going through OK, then you need to focus on the time base. Use the circuit description in the manual to guide your troubleshooting.

Let us know your progress. Your scope looks really clean and is worth preserving.

- Steve

>



Re: How many oscilloscopes a gentleman should have?

Gordon <tekscopes@...>
 

On 10/04/2013 22:17, Brad Thompson wrote:
Pete would
step over to the bench grinder and hey presto! convert
the Philips into a flat-blade screwdriver.
Oddly enough I do the same. They make excellent flat bladed screwdrivers. Even the cheap ones seem to be made of better material than run of the mill flat bladed ones.

Gordon


Re: Planning 2467B LVPS re-cap

vdonisa
 

Just to add more fun - photo of capacitor caulking job uploaded:

http://groups.yahoo.com/group/TekScopes/photos/album/1314606778/pic/2129815628/view

:-) it actually looks decent with the cover on (next photo) :-)

All I need now is a flat screwdriver, a cold chisel and a hammer :-)

Valentin VE3VDO


Re: How many oscilloscopes a gentleman should have?

Leonard
 

I did my part last week and bought a DSA 601a and a DSA 602a. These ought to get a 5x count each for a 10 count total just because of their size.

They will go with my 7904 and several others.

Leonard


Re: How many oscilloscopes a gentleman should have?

Dave Daniel
 

I don't recall. Probably, but it would have been against my philosophical outlook on things.Plus, most of my shoes wouldn't work very well as a hammer. I rarely find myself (a) needing a hammer and (b) needing it while wearing shoes with heels hard enough to use as one. Now, I've used a tape measure for a hammer many times, but tape measures are hard to put on your feet.

On 4/10/2013 5:41 PM, Veronica Merryfield wrote:
You never used a shoe as a hammer?

On 2013-04-10, at 4:28 PM, Bryce Schroeder <bryce.schroeder@gmail.com> wrote:

Well, one does usually need shoes to go to the store or buy new shoes, or to the cobbler to get them repaired.


On 10 April 2013 19:23, Dave Daniel <kc0wjn@gmail.com> wrote:


Well,maybe not.

Are some of your shoes used to repair other shoes?

DaveD



On 4/10/2013 5:06 PM, Veronica Merryfield wrote:
I guess I fail on this list - I have less scopes than shoes, but perhaps that's ok, this was about how many scopes a gentleman should have :)

Female shoes? Are there male shoes too? Do they come in pairs????

For the curious, I have three scopes, one currently working.

On 4/10/2013 3:53 PM, KeepIt SimpleStupid wrote:
Let's pt scopes into perspective. Compare to the number of female shoes.




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

Yahoo! Groups Links



Re: How many oscilloscopes a gentleman should have?

Veronica Merryfield
 

You never used a shoe as a hammer?

On 2013-04-10, at 4:28 PM, Bryce Schroeder <bryce.schroeder@gmail.com> wrote:


Well, one does usually need shoes to go to the store or buy new shoes, or to the cobbler to get them repaired.


On 10 April 2013 19:23, Dave Daniel <kc0wjn@gmail.com> wrote:


Well,maybe not.

Are some of your shoes used to repair other shoes?

DaveD



On 4/10/2013 5:06 PM, Veronica Merryfield wrote:

I guess I fail on this list - I have less scopes than shoes, but perhaps that's ok, this was about how many scopes a gentleman should have :)

Female shoes? Are there male shoes too? Do they come in pairs????

For the curious, I have three scopes, one currently working.

On 4/10/2013 3:53 PM, KeepIt SimpleStupid wrote:

Let's pt scopes into perspective. Compare to the number of female shoes.





Re: How many oscilloscopes a gentleman should have?

Dave Daniel
 

Ah. See?

On 4/10/2013 5:28 PM, Bryce Schroeder wrote:
 
Well, one does usually need shoes to go to the store or buy new shoes, or to the cobbler to get them repaired.


On 10 April 2013 19:23, Dave Daniel <kc0wjn@...> wrote:


Well,maybe not.

Are some of your shoes used to repair other shoes?

DaveD



On 4/10/2013 5:06 PM, Veronica Merryfield wrote:
 

I guess I fail on this list - I have less scopes than shoes, but perhaps that's ok, this was about how many scopes a gentleman should have :)

Female shoes? Are there male shoes too? Do they come in pairs????

For the curious, I have three scopes, one currently working.

On 4/10/2013 3:53 PM, KeepIt SimpleStupid wrote:
>
> Let's pt scopes into perspective. Compare to the number of female shoes.







Re: How many oscilloscopes a gentleman should have?

Tom Jobe <tomjobe@...>
 

This has been a fun question that Valentin has posed to the group, and Jim has answered it perfectly!
In the US they have this thing called the "fifth amendment" where you supposedly do not have to incriminate yourself with your own testimony.
I was going to "take the 5th" (as they say) about how many scopes I actually have until I saw Jim's perfect answer.
"As with oscilloscopes, true gentlemen do not discuss such matters.  It should suffice for his friends to say, "He has all his own tools and he knows how to use them.""
tom jobe...
 
 
 

----- Original Message -----
From: Jim
Sent: Wednesday, April 10, 2013 2:24 PM
Subject: Re: [TekScopes] How many oscilloscopes a gentleman should have?

 

As with oscilloscopes, true gentlemen do not discuss such matters.  It should suffice for his friends to say, "He has all his own tools and he knows how to use them."

73
Jim N6OTQ


From: Peter Gottlieb <hpnpilot@...>
To: TekScopes@...
Cc: vdonisa <vdonisa@...>
Sent: Wednesday, April 10, 2013 1:31 PM
Subject: Re: [TekScopes] How many oscilloscopes a gentleman should have?

How many different screwdrivers should a gentleman have?


Re: TEK 532 --

Cliff White <w5cnw@...>
 

Question: Why does his scope say "Type 532-57"? My 532 just says "Type 532"... ?


On 04/10/2013 03:30 PM, Steve wrote:
 

--- In TekScopes@..., David Sligar wrote:
>
> Hello, Group --
>
> As possibly many new members do, my first post is a plea for help.  Once my very nice 532 is working again, I might decide that I prefer "reliable" to "elegant" -- and trade this one in for something a little newer. 
>
>
> I've been using this scope on a daily basis for about a month. On Friday morning I tuned it on and suddenly -- no sweep.  I've been going through the beast as carefully
> as I can, looking for the bug.
> Tubes all check good, no visible damage / exceptions, "all" voltages measure
> correctly.  I suspect one might need a (working) scope to figure out
> where the sweep waveform disappears.  I decided I'd try running my
> function generator as external sweep -- it worked, so that says at least
> the horiz. amp is OK. I've now spent a couple of days
> and I'm not sure I'll be able to find what's wrong.
>
> Amazing how helpless we are without tools! I hope one or more of you will be able to suggest where I should look.
>
> Thanks very much,
> David Sligar
> Grants Pass, OR

David,

A second scope would be very helpful, but you may be able to do some things without it. Selecting a very slow sweep speed (1 div/sec) would allow you so see the sawtooth on a DMM.

First you need to isolate the main area not working. It could be at least three – trigger, timebase, or blanking. Turning the Trigger Stability control to the far right should force the scope to free run. This does not isolate the trigger circuit however. It only biases the multivibrator in a way to have it reset when the sweep length comparator trips at the end of the sweep.

With another scope, you can trace all of the trigger circuit fairly easily. I usually use line trigger mode when doing this, as I know this gives a reliable signal, eliminating the possibility of a problem in the trigger pickoff circuit in the plug-in. Trace the signal through the comparator(V308), and verify the Trigger level control moves the grid voltage around (pin 9 for all + polarity settings, pin 2 for all – mode positions).

I was hoping to disable the unblanking pulse to rule that out, but I don't see a way to do that simply by pulling tube, as the signal is generated in a dual triode (V430B) that is shared with the trigger multivibrator. Unfortunately, the AC coupling to differentiate the pulse occurs before these tube stages, so there is no place you can easily short to ground or a supply to get a stable DC bias voltage.

If the trigger is going through OK, then you need to focus on the time base. Use the circuit description in the manual to guide your troubleshooting.

Let us know your progress. Your scope looks really clean and is worth preserving.

- Steve

>



Re: How many oscilloscopes a gentleman should have?

Cliff White <w5cnw@...>
 

I have four right now, but I'm soon to be adding another 2xxx series scope and a spectrum analyzer too!

Here's how it is now:

Scopes:
466 (mostly works)
532 (works great!)
536 (where's that smoke comin' from?)
RM15 (getting better...)

Plugins:
CA (sorta-kinda works)
1A1 (who needs channel 2?)
T (why is that tube sparking in there...? Maybe radioactive too...)

Various probes...


On 04/10/2013 01:12 PM, vdonisa wrote:
 

Question inspired from the 532 thread - what's the optimal number of oscilloscopes a gentleman should have?

I know there's a minimum of 2 - so you can repair the troubled one - and I've seen as much as 6 (pretty crowded place, the owner used to have at least 4 pieces of each type of equipment).

What's your "optimal" number?

Valentin :-)



Re: How many oscilloscopes a gentleman should have?

Peter Gottlieb <hpnpilot@...>
 

How many 7844's are enough? Amazing bits of technology.

On 4/10/2013 7:21 PM, Craig Sawyers wrote:

You don't have a 7854?
Yes - the list is not completely up to date (I will keep buying stuff!). You will also note a 7844 there as well that is currently exercising my diagnostic capability.

Craig

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Re: How many oscilloscopes a gentleman should have?

Michael Shiloh <michaelshiloh1010@...>
 

good save!

On 04/10/2013 01:18 PM, Dave Daniel wrote:
I don't think the question precludes women (ladies) owning
oscilloscopes. It is just specific. The number is most probably
different for lades than it is for gentlemen.

(Good save, eh?)

DaveD

On 4/10/2013 1:57 PM, Michael Shiloh wrote:

I wish the question had been phrased in a way that didn't preclude women
from owning oscilloscopes


On 4/10/2013 2:12 PM, vdonisa wrote:
Question inspired from the 532 thread - what's the optimal number of
oscilloscopes a gentleman should have?

I know there's a minimum of 2 - so you can repair the troubled
one - and I've
seen as much as 6 (pretty crowded place, the owner used to have
at least 4
pieces of each type of equipment).

What's your "optimal" number?

Valentin :-)

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