Topics

How Many Scopes?

John Ferguson
 

Without actually knowing anything, I now have two 2445B's, one 2465, and just now a 2445 plus the cute little SC501 that fits in a TM case.  The first 2445b was bought to use, then the second because it worked well on all but channel one whose attenuator hadn't been adequate for oomph of whatever Bozo plugged it into. I had one of our colleagues re-cap the power supply, change the NVRAM for a FRAM, and replace the leaking SMD caps and fix the damage they'd done. This scope is now VERY nice.

Now I had a really good 2445B and the second one which also now has FRAM and better caps on A5, but whatever PS caps were in it. It works ok manually but the Parametric functions don't work. It was a lab scope so footless, no handle,  and missing those nice rubber things on the rear.

So fool that I was I thought I'd buy just those things ..... hah, hah, hah - cheaper to buy a parts scope which is where the 2465 came from. Someone had let it down a bit ungently on the time knob, destroyed the knob and broke the VAR pot shaft.  I was able to find a complete right-side panel on ebay and when it replaced the bad one all was well and the scope worked nicely although the trace could lose a bit of weight.

I also discovered that the shaft on the trace-intensity knob had also been there for the great fall, so it was replaced and now the thing is perfect, more or less.

Thinking that no rational person needs so many scopes I offered it to the local university science dept who had mentioned to me that they needed a good analog scope - Voila they would get the 2465.

But then when I was cleaning it up, I decided to keep it.

There was a 2445 cheap on Ebay which allegedly needed repair. It didn't and it is really nice - so FAU gets that one. And its trace is really fine.

So I'm back to where I was at the end of last week with too many scopes.

Most of the problem seems to be with "parts" scopes.  If I got one that actually didn't work it would be what I'd expected, but the damn things keep showing up with nothing serious wrong with them. And I cannot bring myself to scrap a working scope.  I doubt if any of you can either.

What am I missing?

Harvey White
 

On Thu, 6 Dec 2018 16:19:16 -0500, you wrote:

You're missing space for more scopes.

Depending on what you think of as the service life of the scope,
coupled with how long you will be using it, and throw in the little
bit that these scope parts are in limited supply.....

I'd like to have a good working scope, one working spare, and enough
parts units to be able to replace almost everything once.

Having said that, you may want to look into calibration equipment for
your scopes, if you want to start doing that yourself.

Those plugins will fit in a TM506 right next to the SC501.



Harvey


Without actually knowing anything, I now have two 2445B's, one 2465, and
just now a 2445 plus the cute little SC501 that fits in a TM case.  The
first 2445b was bought to use, then the second because it worked well on
all but channel one whose attenuator hadn't been adequate for oomph of
whatever Bozo plugged it into. I had one of our colleagues re-cap the
power supply, change the NVRAM for a FRAM, and replace the leaking SMD
caps and fix the damage they'd done. This scope is now VERY nice.

Now I had a really good 2445B and the second one which also now has FRAM
and better caps on A5, but whatever PS caps were in it. It works ok
manually but the Parametric functions don't work. It was a lab scope so
footless, no handle,  and missing those nice rubber things on the rear.

So fool that I was I thought I'd buy just those things ..... hah, hah,
hah - cheaper to buy a parts scope which is where the 2465 came from.
Someone had let it down a bit ungently on the time knob, destroyed the
knob and broke the VAR pot shaft.  I was able to find a complete
right-side panel on ebay and when it replaced the bad one all was well
and the scope worked nicely although the trace could lose a bit of weight.

I also discovered that the shaft on the trace-intensity knob had also
been there for the great fall, so it was replaced and now the thing is
perfect, more or less.

Thinking that no rational person needs so many scopes I offered it to
the local university science dept who had mentioned to me that they
needed a good analog scope - Voila they would get the 2465.

But then when I was cleaning it up, I decided to keep it.

There was a 2445 cheap on Ebay which allegedly needed repair. It didn't
and it is really nice - so FAU gets that one. And its trace is really fine.

So I'm back to where I was at the end of last week with too many scopes.

Most of the problem seems to be with "parts" scopes.  If I got one that
actually didn't work it would be what I'd expected, but the damn things
keep showing up with nothing serious wrong with them. And I cannot bring
myself to scrap a working scope.  I doubt if any of you can either.

What am I missing?





John Ferguson
 

Sent from Mail for Windows 10

From: Harvey White
Sent: Thursday, December 6, 2018 4:29 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] How Many Scopes?

On Thu, 6 Dec 2018 16:19:16 -0500, you wrote:

You're missing space for more scopes.

Depending on what you think of as the service life of the scope,
coupled with how long you will be using it, and throw in the little
bit that these scope parts are in limited supply.....

I'd like to have a good working scope, one working spare, and enough
parts units to be able to replace almost everything once.

Having said that, you may want to look into calibration equipment for
your scopes, if you want to start doing that yourself.

Those plugins will fit in a TM506 right next to the SC501.

Hi Harvey,

I’m actually up to my ears with other projects and one of our members here in the US does terrific repairs and calibrations.
This is probably not very smart but I compared the measurement I get on the other scopes to the calibrated one and find them pretty close, certainly close enough for what I do.

Best regards, john

tom jobe <tomjobe@...>
 

You're not 'missing' anything!
Life is good and people are great!

On 12/6/2018 1:19 PM, John Ferguson via Groups.Io wrote:
Without actually knowing anything, I now have two 2445B's, one 2465, and just now a 2445 plus the cute little SC501 that fits in a TM case.  The first 2445b was bought to use, then the second because it worked well on all but channel one whose attenuator hadn't been adequate for oomph of whatever Bozo plugged it into. I had one of our colleagues re-cap the power supply, change the NVRAM for a FRAM, and replace the leaking SMD caps and fix the damage they'd done. This scope is now VERY nice.

Now I had a really good 2445B and the second one which also now has FRAM and better caps on A5, but whatever PS caps were in it. It works ok manually but the Parametric functions don't work. It was a lab scope so footless, no handle,  and missing those nice rubber things on the rear.

So fool that I was I thought I'd buy just those things ..... hah, hah, hah - cheaper to buy a parts scope which is where the 2465 came from. Someone had let it down a bit ungently on the time knob, destroyed the knob and broke the VAR pot shaft.  I was able to find a complete right-side panel on ebay and when it replaced the bad one all was well and the scope worked nicely although the trace could lose a bit of weight.

I also discovered that the shaft on the trace-intensity knob had also been there for the great fall, so it was replaced and now the thing is perfect, more or less.

Thinking that no rational person needs so many scopes I offered it to the local university science dept who had mentioned to me that they needed a good analog scope - Voila they would get the 2465.

But then when I was cleaning it up, I decided to keep it.

There was a 2445 cheap on Ebay which allegedly needed repair. It didn't and it is really nice - so FAU gets that one. And its trace is really fine.

So I'm back to where I was at the end of last week with too many scopes.

Most of the problem seems to be with "parts" scopes.  If I got one that actually didn't work it would be what I'd expected, but the damn things keep showing up with nothing serious wrong with them. And I cannot bring myself to scrap a working scope.  I doubt if any of you can either.

What am I missing?




Tom Gardner
 

On 06/12/18 21:19, John Ferguson via Groups.Io wrote:
So I'm back to where I was at the end of last week with too many scopes.

Most of the problem seems to be with "parts" scopes.  If I got one that actually didn't work it would be what I'd expected, but the damn things keep showing up with nothing serious wrong with them. And I cannot bring myself to scrap a working scope.  I doubt if any of you can either.

What am I missing?
A1: N+1 scopes, the next one being better for some purposes

A2: a support group. Try:
http://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/
but note that after the first 10,000 responses it degenerates :)

Craig Sawyers <c.sawyers@...>
 

Thinking that no rational person needs so many scopes I offered it to the local university science
dept
who had mentioned to me that they needed a good analog scope - Voila they would get the 2465.
OK - 7904, 7904A, 7834 ,7844, 7104, 7313, 7623B, 7633, 7603, 7704A, 7854, 7403N, 7912HB, 7934
545A, 545B, 564 , 575, 576, 577D2, 575 mod 122C, 585A, 475/DM44, 453

That is kind of the tip of the iceberg. Pass the tablets and a glass of water.

Craig

John Ferguson
 

What Craig,  no 24**'s ??

On 12/6/18 5:23 PM, Craig Sawyers wrote:
Thinking that no rational person needs so many scopes I offered it to the local university science
dept
who had mentioned to me that they needed a good analog scope - Voila they would get the 2465.
OK - 7904, 7904A, 7834 ,7844, 7104, 7313, 7623B, 7633, 7603, 7704A, 7854, 7403N, 7912HB, 7934
545A, 545B, 564 , 575, 576, 577D2, 575 mod 122C, 585A, 475/DM44, 453

That is kind of the tip of the iceberg. Pass the tablets and a glass of water.

Craig

David Slipper
 

I don't think it's possible to have too many 'scopes!!!!

I'm at 4 and counting ;-)

Dave

Dave Daniel
 

Hmmmm....

Let S = the number of 'scopes that one currently owns.

Let D = the number of 'scopes that one acquires in the next 24 hour period that one buys one or more 'scopes.

Let T = the number of 'scopes that one would deem to be "too many".

Then T = S + D + 1.

T, of course, increments every time one buys one or more 'scopes.

QED.

DaveD

On 12/6/2018 4:19 PM, John Ferguson via Groups.Io wrote:
Without actually knowing anything, I now have two 2445B's, one 2465, and just now a 2445 plus the cute little SC501 that fits in a TM case.  The first 2445b was bought to use, then the second because it worked well on all but channel one whose attenuator hadn't been adequate for oomph of whatever Bozo plugged it into. I had one of our colleagues re-cap the power supply, change the NVRAM for a FRAM, and replace the leaking SMD caps and fix the damage they'd done. This scope is now VERY nice.

Now I had a really good 2445B and the second one which also now has FRAM and better caps on A5, but whatever PS caps were in it. It works ok manually but the Parametric functions don't work. It was a lab scope so footless, no handle,  and missing those nice rubber things on the rear.

So fool that I was I thought I'd buy just those things ..... hah, hah, hah - cheaper to buy a parts scope which is where the 2465 came from. Someone had let it down a bit ungently on the time knob, destroyed the knob and broke the VAR pot shaft.  I was able to find a complete right-side panel on ebay and when it replaced the bad one all was well and the scope worked nicely although the trace could lose a bit of weight.

I also discovered that the shaft on the trace-intensity knob had also been there for the great fall, so it was replaced and now the thing is perfect, more or less.

Thinking that no rational person needs so many scopes I offered it to the local university science dept who had mentioned to me that they needed a good analog scope - Voila they would get the 2465.

But then when I was cleaning it up, I decided to keep it.

There was a 2445 cheap on Ebay which allegedly needed repair. It didn't and it is really nice - so FAU gets that one. And its trace is really fine.

So I'm back to where I was at the end of last week with too many scopes.

Most of the problem seems to be with "parts" scopes.  If I got one that actually didn't work it would be what I'd expected, but the damn things keep showing up with nothing serious wrong with them. And I cannot bring myself to scrap a working scope.  I doubt if any of you can either.

What am I missing?




Craig Sawyers <c.sawyers@...>
 

What Craig, no 24**'s ??
Got to draw the line somewhere. My long-suffering wife already points out that there is a fine
dividing line between collecting and restoring Tek gear and mental illness ;-)

Oh - almost forgot my "handbag" scope - a lightweight four channel 60MHz Tek 2004B. My only real foray
into digital storage oscilloscopes (other than the 7854 and 7912HB that is)

Craig

Paul Amaranth
 

I can count 12 from my desk, there's about 10 or so (parts and
fixer candidates) around the corner and maybe 4 or 5 5000 series
in the other room. They include many 4xx series, a few 7000
mainframes and a few 24xx scopes. Also a 335 and a couple of
2xx scopes plus a couple of oddballs. About a dozen are
fully operational and the rest are in the repair queue or parts
donors. So no, I don't think you can specify an upper limit.
And, I have it on good authority, that I'm perfectly normal.

I just got a 2465b the other week.

I will be thinning the herd, although I really hate shipping.
Even when pared down, I think I'll be left with around a dozen or so.
Well, maybe more if I'm honest.

Paul

On Thu, Dec 06, 2018 at 10:48:41PM +0000, David Slipper wrote:

I don't think it's possible to have too many 'scopes!!!!

I'm at 4 and counting ;-)

Dave








!DSPAM:5c09a7c9180633695612851!
--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows

Vincent Trouilliez
 

This thread is therapy to me... thank you John....

My first scope 20 years ago:

Hameg 604

Then a couple years ago I got infected by the "CRO" virus, it's getting out of hand I fear...

2232
5111A
2215A
TDS 544A
TDS 310
317 my first "glowing" Tek, just finished its restoration
317 another one
317 yet another
317 fourth and last one I promise !... ^^
310A
531A
502
502A just started its restoration

515A - just bough, awaiting delivery
Fluke/Philips " Combiscope " - also just bought, awaiting delivery



And I want a TDS380, a TDS 784D and a 694C, and a 585 or 545 or 535, and 2467B, and a 2236, and also a TDS 224 and a Tek 222 or 224, and a old Metrix scope, the ones I had at school back in the day, oh I would like one of these portable/isolated Fluke scopes as well.
The list is non exhaustive of course....


Vincent Trouilliez

Brendan
 

Glad I'm not the only one with this illness.
two 453's
two 485's
two newly acquired 2430A's
2213A
2215
2221
468
TDS320 also newly acquired
7633
465
TM504
TM506

And currently working on a TDS420 power supply. I hope I can add it to the rest of working scopes. I want to add a 475, something tubed and a higher end 24xx series. I love this hobby and the people involved.

David Slipper
 

Perhaps we should rename this group "Scopes Anonymous" ;-)

Dave

Jim Ford
 

Lop pol, I was going to say at least no vacuum tubes except the CRT, but you said you want one (or two, or more).  Personally, I don't see why you would want a tube scope.  I mean, tubes are great for audio and guitar amplifiers, but why mess around with shack-heating fire bottles?  My preference is for 7000 and 5000 series solid-state scopes, although I do own an HP 54504A DSO because they were throwing it out at work.
Maybe if you used a tube scope back in the old days?  I used to have an HP 8566 spectrum analyzer, an 8350B sweeper, and 8494 and 8495 step attenuators back 25+ years ago at work, and now I have them all in my garage lab.  Had a Tek 2465B as well, but the knob and button lag drove me crazy, so I have no  intention of buying one now.  I sure would like a CSA803 again, but working on those digital beasts is such a pain.  Oh well.
Jim F

Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: "lop pol via Groups.Io" <the_infinite_penguin=yahoo.com@groups.io> Date: 12/6/18 5:51 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] How Many Scopes?
Glad I'm not the only one with this illness.
two 453's
two 485's
two newly acquired 2430A's
2213A
2215
2221
468
TDS320 also newly acquired
7633
465
TM504
TM506

And currently working on a TDS420 power supply. I hope I can add it to the rest of working scopes. I want to add a 475, something tubed and a higher end 24xx series. I love this hobby and the people involved.

Harvey White
 

On Thu, 6 Dec 2018 16:43:41 -0500, you wrote:



Sent from Mail for Windows 10

From: Harvey White
Sent: Thursday, December 6, 2018 4:29 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] How Many Scopes?

On Thu, 6 Dec 2018 16:19:16 -0500, you wrote:

You're missing space for more scopes.

Depending on what you think of as the service life of the scope,
coupled with how long you will be using it, and throw in the little
bit that these scope parts are in limited supply.....

I'd like to have a good working scope, one working spare, and enough
parts units to be able to replace almost everything once.

Having said that, you may want to look into calibration equipment for
your scopes, if you want to start doing that yourself.

Those plugins will fit in a TM506 right next to the SC501.

Hi Harvey,

I’m actually up to my ears with other projects and one of our members here in the US does terrific repairs and calibrations.
This is probably not very smart but I compared the measurement I get on the other scopes to the calibrated one and find them pretty close, certainly close enough for what I do.
I am set up for a number of repairs and calibration steps, so that's
not the problem. Up to my ears in a lot of projects, too. However,
as long as the scope is close enough for you, that's good enough. The
more scopes you have, the more you'll feel as if you need more
calibration stuff.

Harvey




Best regards, john



Dave Seiter
 

I too had to draw the line somewhere, and it was also with the portables.  Somewhere north of 80, with no 2xxx or 4xx scopes.  
I almost bought a 535(I think) plus cart, CA, 1L10 and 1S2 for $35 at an estate sale a month ago, but another guy bought it out from under me (almost literally!- I was going to buy it, but noticed that the right cover was lifted and a tube was missing.  I was in the process of pulling the panel to see if it had been completely harvested, when the guy told the seller right behind me that he'd take the whole thing.  He just spoke before I thought to, and I didn't feel like arguing.)   He turned around the 1L10 and 1S2 on ebay for $199.99 about 3 weeks ago.  I got a nice 1L5, W, O and 1A6 from the same sale.  The former owner was a ham and experimented with TV, but his garage must have been regularly damp because much of the hardware has developed the white "fuzz".  
The type W is labeled as being "modified for station B".  It's not clear what that means; I initially thought that the B input had been routed to the A channel, but I don't see any evidence of that.  I have so many projects, it could be quite a while before I "get round tuit"
-Dave

From: Craig Sawyers <c.sawyers@...>
To: TekScopes@groups.io
Sent: Thursday, December 6, 2018 3:08 PM
Subject: Re: [TekScopes] How Many Scopes?

What Craig,  no 24**'s ??
Got to draw the line somewhere. My long-suffering wife already points out that there is a fine
dividing line between collecting and restoring Tek gear and mental illness ;-)

Oh - almost forgot my "handbag" scope - a lightweight four channel 60MHz Tek 2004B. My only real foray
into digital storage oscilloscopes (other than the 7854 and 7912HB that is)

Craig

 

I feel so disadvantaged. I only have three Tek scopes and three mongrels. Now just what do I do if I have to display more than 12 waveforms at once ?

Vincent Trouilliez
 

On Fri, Dec 7, 2018 at 10:59 AM, Jeff Urban wrote:
I feel so disadvantaged. I only have three Tek scopes and three mongrels. Now
just what do I do if I have to display more than 12 waveforms at once ?
I guess it's like asking a women why does she have 564 different pairs of shoes, but only one pair of feet to use them with.... ^^

Vincent Trouilliez

Jim Ford
 

Ha, Vincent, how apropos!  My wife and I are in the process of moving stuff out of her parents' house to sell it.  We went through the closet recently and found enough shoes to make Imelda Marcos envious!  Most probably never worn and some literally crumbling into dust!
As far as scopes goes, I'm at 4 but that is by no means the end of the story.   I'd like a 7854 to put my sampling plug-ins in and average out the noise and jitter, a CSA803 or 11801-11803 for 20 GHz+ sampling, parts mule 7603, 7854, 5110, HP 54504A,  and 7904, and maybe a USB DSO for the portability.   Maybe a 485 or 2465B/2567 to have a nice high-BW analog scope.  Something like that. 
Jim F


Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Vincent Trouilliez <vincent.trouilliez@...> Date: 12/7/18 2:04 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] How Many Scopes?
On Fri, Dec  7, 2018 at 10:59 AM, Jeff Urban wrote:
I feel so disadvantaged. I only have three Tek scopes and three mongrels. Now
just what do I do if I have to display more than 12 waveforms at once ?
I guess it's like asking a women why does she have 564 different pairs of shoes, but only one pair of feet to use them with.... ^^

Vincent Trouilliez