Date   

Re: After 30 years, the modern and sophisticated digital oscilloscopes of today, ??

iglesia_cristiana_arpas_eternas
 

Hi David, I mean if they will still be providing good service, as today we provide the venerable old Tektronix!.
My first 422 still works like the first day, and keeps a pristine beam in the new home, sold it a few years ago.
Gabriel.

--- In TekScopes@yahoogroups.com, David <davidwhess@...> wrote:

Why wait 30 years? They do not work that way now and even their
resemblance to early DSOs is fading.

If I designed a DSO from scratch, it would resemble an old DSO more
than a new one by preference.

On Wed, 08 May 2013 00:57:27 -0000, "iglesia_cristiana_arpas_eternas"
<iglesia_cristiana_arpas_eternas@...> wrote:

After 30 years at least, the modern and sophisticated digital oscilloscopes of today, will still work like our venerable Tektronix do ?.
Just that..what yours opinion guys?.
Gabriel


Re: 2465B - Error Codes

m8jpk
 

Hello Nandgopal
I would also ckeck all the smd caps 10uF and 33uF on the board.
Have you tried to calibrate it?
Before you go to changing the NV ram TRY and go thru 
the complete cal procedure. 
Regards M8JPK


Re: Solder Sucker Recommendation?

 

A triac can control many watts and does not take up much space. Plus, it is a 240 volt unit so the current is not that high. Just look at the size of a lamp dimmer.
 
-Tom
 
 

----- Original Message -----
Sent: Wednesday, May 08, 2013 12:50 AM
Subject: Re: [TekScopes] Solder Sucker Recommendation?

 

They just need a few watts at low voltage for the fan and control circuit, the heater voltage is fed straight through.

ST

On Wed, May 8, 2013 at 6:35 AM, Don Black <donald_black@...> wrote:


I'm intrigued by how small they can now make a 420 watt power supply now. eBay item 280783317481.

Don Black.


Re: Solder Sucker Recommendation?

stefan_trethan
 

They just need a few watts at low voltage for the fan and control circuit, the heater voltage is fed straight through.

ST


On Wed, May 8, 2013 at 6:35 AM, Don Black <donald_black@...> wrote:


I'm intrigued by how small they can now make a 420 watt power supply now. eBay item 280783317481.

Don Black.


Re: Solder Sucker Recommendation?

Don Black <donald_black@...>
 

I'm intrigued by how small they can now make a 420 watt power supply now. eBay item 280783317481.

Don Black.

On 08-May-13 10:20 AM, Larry McDavid wrote:
 

It is difficult to beat the performance of a Hakko 808 De-Soldering Gun,
available even on Amazon. With the vacuum pump located in the gun, there
is no air flow restriction within a long hose to a bench-mounted vacuum
source. Frankly, the Hakko 808 gun has *serious* suck! I've not found
anything better for through-hole de-soldering.

Larry

On 5/7/2013 4:28 PM, Philip wrote:
> I have been using an old Soldapullt solder sucker I refurbished to work
> on boards. It has been working pretty well up until recently. It just
> doesn't seem to have enough umph to really pull the solder out of the
> holes. I end up getting most of it out but not enough to free the lead.
> I then heat it up some more and pull on the device from the other side.
> Then I put some solder on the land with the device removed and then the
> solder sucker will usually clean it out.
>
> Is this as good as can be hoped for on these old boards and solder or is
> there a better way? Does any one have a recommendation for a good solder
> sucker or other desoldering method than I have described for removing
> components while preserving the integrity of the board and lands?
...

--
Best wishes,

Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)



Re: Ebay seller Mountop

ROLYNN PRECHTL K7DFW
 

Looks like they had two units. One working and parts unit. Did they ship the wrong unit?

==================================================

It appears the two listings are for the same unit as the seller ended the first one ("This listing
was ended by the seller because there was an error in the listing.") and apparently cobbled the
unit to re-list it.

The entire listing description of only 14 words is a little too vague for me to have any
expectations of receiving a 100% working and calibrated instrument. Especially for $177.14 to my
front door.

"Unit powers on. Power cable included. Small damage on back side. Testing seems accurate."

The word seems doesn't give me any confidence. Two channels connected to the cal output was
probably the extent of their "testing".


RP


Re: Ebay seller Mountop

G. K. <glkinst@...>
 

Looks like they had two units. One working and parts unit. Did they ship the wrong unit? - George

From: jerry massengale
To: TekScopes2@...; tekscopes@...
Sent: Tuesday, May 7, 2013 7:22 PM
Subject: [TekScopes] Ebay seller Mountop
 
Hi,I received a 2246A that was supposed to be fully functional with power cord and it did not have the power cord. It does not pass self test and does not autocal. The seller asked me if I wanted a refund for the power cord. Does anyone know these guys?

Jerry Massengale


Re: Ebay seller Mountop

Peter Gottlieb <hpnpilot@...>
 

File a "not as described" complaint with ebay and demand a full refund.

On 5/7/2013 10:22 PM, jerry massengale wrote:

Hi,

I received a 2246A that was supposed to be fully functional with power cord and it did not have the power cord. It does not pass self test and does not autocal. The seller asked me if I wanted a refund for the power cord. Does anyone know these guys?

Jerry Massengale

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

No virus found in this message.
Checked by AVG - www.avg.com <http://www.avg.com>
Version: 10.0.1432 / Virus Database: 3162/5806 - Release Date: 05/07/13


Ebay seller Mountop

 

Hi,

I received a 2246A that was supposed to be fully functional with power cord and it did not have the power cord. It does not pass self test and does not autocal. The seller asked me if I wanted a refund for the power cord. Does anyone know these guys?

Jerry Massengale


Re: 2465B - Error Codes

Dave / NR1DX
 

Page 6-12 out of limits CAL Data error


On 5/7/2013 6:44 PM, Nandagopal wrote:
 

Hi
I have been into servicing of an old Tekscope 2465B purchased in 1990.
I had power supply problem in both inverter section and Low voltage power supply problem. With the help of varous websites I resolved the power supply problem. Now the scope is working very fine. However during self test the error shown as "Test 04 Error 12". I think it is Checksum error in one of the calibration data stored in NVRAM. I donot find error code information in the manual. Can some one help?


-- 
Dave Henderson
Manuals@...
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265


Re: After 30 years, the modern and sophisticated digital oscilloscopes of today, ??

 

Yes, many of us think in terms of how long a AA battery will last.
 
 

----- Original Message -----
From: vdonisa
Sent: Tuesday, May 07, 2013 9:23 PM
Subject: [TekScopes] Re: After 30 years, the modern and sophisticated digital oscilloscopes of today, ??

 

You must be young. I really don't care what will happen then, it would be past my datasheet life expectation. If I miraculously get by then, I'll probably be nearly blind and deaf, have Parkinson and Alzheimer and couldn't tell a scope from a doorstop.

--- In TekScopes@..., "iglesia_cristiana_arpas_eternas" wrote:
>
> After 30 years at least, the modern and sophisticated digital oscilloscopes of today, will still work like our venerable Tektronix do ?.
> Just that..what yours opinion guys?.
> Gabriel
>


Re: Lady Luck

 

Yes, it does have highly active Lithium in it that must be disposed of properly. I can provide that service at a very affordable cost.
Just let me know. BTW, I would not trust these other unverified denizens to do the correct thing :).
 
Anyway, good going. Things in life seldom work that well.
 
 
 

----- Original Message -----
From: vdonisa
Sent: Tuesday, May 07, 2013 9:33 PM
Subject: [TekScopes] Re: Lady Luck

 

It's actually contagious too, all your scopes will get it unless you promptly ship it here... for environmentally safe disposal...

--- In TekScopes@..., "Randy B." wrote:
>
> YES, YES, the jitters is very serious. You need to package them up and send
> them to me as soon as possible!! J Can I get a HI HI
>
> Randy B.
>
>
>
> From: TekScopes@... [mailto:TekScopes@...] On Behalf
> Of metoorich
> Sent: Tuesday, May 07, 2013 6:15 PM
> To: TekScopes@...
> Subject: [TekScopes] Lady Luck
>
>
>
>
>
> I should go to Vegas this week.... crazy. I responded to a Craigslist ad, a
> retired gentleman had some 'electronic test equipment' he was selling. He
> wasn't sure on the models, but had a couple of oscilloscopes. I met him in
> the parking lot of Cabella's, and to my surprise he had a Tek 475A and a
> 2467B. Probes, manuals, the whole enchilada. He sold them to me for $200
> (total). I figured this is too good to be true, there must be something
> wrong with them. I figured the 2467B would cover my cost if I had to part it
> out. So I got them home just now and the work... I can hardly believe it. It
> still has the calibration report from 2000 in the pouch. This screen is
> bright.
>
> I let the 2467B warm up and the screen has a slight case of the jitters... I
> hope that's not serious.
>
> Photo:
> http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/664500579
> /view?picmode=
> <http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/66450057
> 9/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc>
> &mode=tn&order=ordinal&start=1&count=20&dir=asc
>


Re: After 30 years, the modern and sophisticated digital oscilloscopes of today, ??

 

Why wait 30 years? They do not work that way now and even their
resemblance to early DSOs is fading.

If I designed a DSO from scratch, it would resemble an old DSO more
than a new one by preference.

On Wed, 08 May 2013 00:57:27 -0000, "iglesia_cristiana_arpas_eternas"
<iglesia_cristiana_arpas_eternas@yahoo.com.ar> wrote:

After 30 years at least, the modern and sophisticated digital oscilloscopes of today, will still work like our venerable Tektronix do ?.
Just that..what yours opinion guys?.
Gabriel


Re: Lady Luck

vdonisa
 

It's actually contagious too, all your scopes will get it unless you promptly ship it here... for environmentally safe disposal...

--- In TekScopes@yahoogroups.com, "Randy B." <brumback@...> wrote:

YES, YES, the jitters is very serious. You need to package them up and send
them to me as soon as possible!! J Can I get a HI HI

Randy B.



From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf
Of metoorich
Sent: Tuesday, May 07, 2013 6:15 PM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Lady Luck





I should go to Vegas this week.... crazy. I responded to a Craigslist ad, a
retired gentleman had some 'electronic test equipment' he was selling. He
wasn't sure on the models, but had a couple of oscilloscopes. I met him in
the parking lot of Cabella's, and to my surprise he had a Tek 475A and a
2467B. Probes, manuals, the whole enchilada. He sold them to me for $200
(total). I figured this is too good to be true, there must be something
wrong with them. I figured the 2467B would cover my cost if I had to part it
out. So I got them home just now and the work... I can hardly believe it. It
still has the calibration report from 2000 in the pouch. This screen is
bright.

I let the 2467B warm up and the screen has a slight case of the jitters... I
hope that's not serious.

Photo:
http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/664500579
/view?picmode=
<http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/66450057
9/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc>
&mode=tn&order=ordinal&start=1&count=20&dir=asc


Re: Lady Luck

vdonisa
 

Nope, you can change those figures at will... How about peeking inside the case to see what's going on in there....

--- In TekScopes@yahoogroups.com, "metoorich" <richard@...> wrote:

Wow, the 2467B has 435 hours and 23 start/stops. Is that tamper proof? It doesn't seem probable.

--- In TekScopes@yahoogroups.com, "J. L. Trantham" <jltran@> wrote:

Outstanding!



Joe



From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf
Of metoorich
Sent: Tuesday, May 07, 2013 6:47 PM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Re: Lady Luck





I totally agree. We had already agreed to meet again because he has more
test equipment for sale in storage. He said he used to own a fiber optics
backbone manufacturing company that he sold. He fishes and hunts now. I have
lots ammunition reloading gear (dies, primer, powder, brass, bullets, etc)
that he's very interested in, so I will have the chance to show my
appreciation.

--- In TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com> , "J.
L. Trantham" <jltran@> wrote:

Looks good from here.



In the spirit of 'commit random acts of kindness' you might want to
contact
the seller, let him know that all was well, and give him a 'tip'.



Congrats on a great addition to the bench.



Joe



From: TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com>
[mailto:TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com> ] On
Behalf
Of metoorich
Sent: Tuesday, May 07, 2013 5:15 PM
To: TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com>
Subject: [TekScopes] Lady Luck





I should go to Vegas this week.... crazy. I responded to a Craigslist ad,
a
retired gentleman had some 'electronic test equipment' he was selling. He
wasn't sure on the models, but had a couple of oscilloscopes. I met him in
the parking lot of Cabella's, and to my surprise he had a Tek 475A and a
2467B. Probes, manuals, the whole enchilada. He sold them to me for $200
(total). I figured this is too good to be true, there must be something
wrong with them. I figured the 2467B would cover my cost if I had to part
it
out. So I got them home just now and the work... I can hardly believe it.
It
still has the calibration report from 2000 in the pouch. This screen is
bright.

I let the 2467B warm up and the screen has a slight case of the jitters...
I
hope that's not serious.

Photo:
http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/664500579
/view?picmode=
<http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/66450057
9/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc>
&mode=tn&order=ordinal&start=1&count=20&dir=asc


Re: Lady Luck

metoorich
 

Wow, the 2467B has 435 hours and 23 start/stops. Is that tamper proof? It doesn't seem probable.

--- In TekScopes@yahoogroups.com, "J. L. Trantham" <jltran@...> wrote:

Outstanding!



Joe



From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf
Of metoorich
Sent: Tuesday, May 07, 2013 6:47 PM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Re: Lady Luck





I totally agree. We had already agreed to meet again because he has more
test equipment for sale in storage. He said he used to own a fiber optics
backbone manufacturing company that he sold. He fishes and hunts now. I have
lots ammunition reloading gear (dies, primer, powder, brass, bullets, etc)
that he's very interested in, so I will have the chance to show my
appreciation.

--- In TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com> , "J.
L. Trantham" <jltran@> wrote:

Looks good from here.



In the spirit of 'commit random acts of kindness' you might want to
contact
the seller, let him know that all was well, and give him a 'tip'.



Congrats on a great addition to the bench.



Joe



From: TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com>
[mailto:TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com> ] On
Behalf
Of metoorich
Sent: Tuesday, May 07, 2013 5:15 PM
To: TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com>
Subject: [TekScopes] Lady Luck





I should go to Vegas this week.... crazy. I responded to a Craigslist ad,
a
retired gentleman had some 'electronic test equipment' he was selling. He
wasn't sure on the models, but had a couple of oscilloscopes. I met him in
the parking lot of Cabella's, and to my surprise he had a Tek 475A and a
2467B. Probes, manuals, the whole enchilada. He sold them to me for $200
(total). I figured this is too good to be true, there must be something
wrong with them. I figured the 2467B would cover my cost if I had to part
it
out. So I got them home just now and the work... I can hardly believe it.
It
still has the calibration report from 2000 in the pouch. This screen is
bright.

I let the 2467B warm up and the screen has a slight case of the jitters...
I
hope that's not serious.

Photo:
http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/664500579
/view?picmode=
<http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/66450057
9/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc>
&mode=tn&order=ordinal&start=1&count=20&dir=asc


After 30 years, the modern and sophisticated digital oscilloscopes of today, ??

iglesia_cristiana_arpas_eternas
 

After 30 years at least, the modern and sophisticated digital oscilloscopes of today, will still work like our venerable Tektronix do ?.
Just that..what yours opinion guys?.
Gabriel


Re: Lady Luck

J. L. Trantham
 

Outstanding!

 

Joe

 

From: TekScopes@... [mailto:TekScopes@...] On Behalf Of metoorich
Sent: Tuesday, May 07, 2013 6:47 PM
To: TekScopes@...
Subject: [TekScopes] Re: Lady Luck

 

 

I totally agree. We had already agreed to meet again because he has more test equipment for sale in storage. He said he used to own a fiber optics backbone manufacturing company that he sold. He fishes and hunts now. I have lots ammunition reloading gear (dies, primer, powder, brass, bullets, etc) that he's very interested in, so I will have the chance to show my appreciation.

--- In TekScopes@..., "J. L. Trantham" <jltran@...> wrote:
>
> Looks good from here.
>
>
>
> In the spirit of 'commit random acts of kindness' you might want to contact
> the seller, let him know that all was well, and give him a 'tip'.
>
>
>
> Congrats on a great addition to the bench.
>
>
>
> Joe
>
>
>
> From: TekScopes@... [mailto:TekScopes@...] On Behalf
> Of metoorich
> Sent: Tuesday, May 07, 2013 5:15 PM
> To: TekScopes@...
> Subject: [TekScopes] Lady Luck
>
>
>
>
>
> I should go to Vegas this week.... crazy. I responded to a Craigslist ad, a
> retired gentleman had some 'electronic test equipment' he was selling. He
> wasn't sure on the models, but had a couple of oscilloscopes. I met him in
> the parking lot of Cabella's, and to my surprise he had a Tek 475A and a
> 2467B. Probes, manuals, the whole enchilada. He sold them to me for $200
> (total). I figured this is too good to be true, there must be something
> wrong with them. I figured the 2467B would cover my cost if I had to part it
> out. So I got them home just now and the work... I can hardly believe it. It
> still has the calibration report from 2000 in the pouch. This screen is
> bright.
>
> I let the 2467B warm up and the screen has a slight case of the jitters... I
> hope that's not serious.
>
> Photo:
> http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/664500579
> /view?picmode=
> <http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/66450057
> 9/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc>
> &mode=tn&order=ordinal&start=1&count=20&dir=asc
>


Re: Lady Luck

Randy B. <brumback@...>
 

YES, YES, the jitters is very serious. You need to package them up and send them to me as soon as possible!!  J  Can I get a HI HI

Randy B.

 

From: TekScopes@... [mailto:TekScopes@...] On Behalf Of metoorich
Sent: Tuesday, May 07, 2013 6:15 PM
To: TekScopes@...
Subject: [TekScopes] Lady Luck

 

 

I should go to Vegas this week.... crazy. I responded to a Craigslist ad, a retired gentleman had some 'electronic test equipment' he was selling. He wasn't sure on the models, but had a couple of oscilloscopes. I met him in the parking lot of Cabella's, and to my surprise he had a Tek 475A and a 2467B. Probes, manuals, the whole enchilada. He sold them to me for $200 (total). I figured this is too good to be true, there must be something wrong with them. I figured the 2467B would cover my cost if I had to part it out. So I got them home just now and the work... I can hardly believe it. It still has the calibration report from 2000 in the pouch. This screen is bright.

I let the 2467B warm up and the screen has a slight case of the jitters... I hope that's not serious.

Photo:
http://groups.yahoo.com/group/TekScopes/photos/album/666236491/pic/664500579/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc


Re: Can a 7844 use two 7CT1N plugins at the same time?

 

Very good question. Unfortunately I don't know the answer. I didn't think to
try that in any of my other 4 slot scopes for some DUMB! reason. Even as I
think about the possibility I am not sure if it will or will not work.

I have returned the 7CT1N to Jerry with my thanks. As soon as I get another
7CT1N that will be the first thing I try.

Dennis

-----Original Message-----
From: David, Sent: Tuesday, May 07, 2013 4:23 PM

Will this work in any other 4 slot 7000 series set to ALT/ALT mode?
The mainframe would not be able to chop the signals together so I guess it
would depend on how the 7CT1N acts to duplicate the signals that two
timebases would generate in horizontal ALT mode.

On Tue, 7 May 2013 15:36:09 -0700, "Dennis Tillman"
<dennis@ridesoft.com> wrote:

Jerry Scheltgen loaned me a 2nd 7CT1N so I was able to finally do this
test several months ago. Here are two photos I took that cannot be done
with any other scope except a 7000 series oscilloscope

The first photo shows what an actual load line of a Class B amplifier
looks like. It was created by displaying the load line of an NPN
transistor in one 7CT1N curve tracer and the load line of a PNP
transistor in the second 7CT1N (thanks to Jerry) simultaneously. The
load lines were lined up at the origin as they would be in a Class B
amplifier.

The 2nd photo shows two closely matched (but not perfectly matched)
transistors. The traces from one beam of the 7844 are slightly brighter
to enable you to distinguish one transistor's characteristic curves
from the other transistor's curves.

Dennis.

From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On
Behalf Of Dennis Tillman
Sent: Monday, May 07, 2012 2:36 PM

All of the discussion about the 7844 being two scopes in one got me
wondering if I could insert two 7CT1N curve tracer plugins into it and
direct one set of transistor curves to one beam and the other set to
the 2nd beam. I can't see whay it wouldn't work And it would be
interesting to then see if it was possible to do this on a conventional
single beam 7000 scope too.

This may be more than an academic exercise if it turns out it can
display a PNP and an NPN simultaneously I wonder if there is a way to
combine the curves together to see what the load line or transfer curve
for a class B amplifier looks like.

I have one 7CT1N but I don't own two. Is there anyone in the Seattle
area that has a 7CT1N who wouldn't mind my bring over a 7844 with my
7CT1N and taking some pictures of it displaying two sets of transistor
curves at the same time.

Contact me off line if you are interested and have a 7CT1N. I have the
all the rest I need to do this.

Dennis

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