Date   

Re: Newbie shopping questions

Craig Sawyers <c.sawyers@...>
 

I'm looking for a scope that's repairable (I don't mean broken). I read
on
some site that I think it was the 454 was the last model that didn't use
proprietary Tektronix-made ICs. I don't have anything against them in
principle, if they were guaranteed to be available for the next 30 years
or so.
I've seen Tek scopes still running at 50 years old, and I think not making
parts
available is just planned obsolescence. I don't want to play that game.
The 454A is a good choice at 150MHz. An alternative at lower bandwidth of
60MHz is the 453A, but it also has 5mV/div max sensitivity, whereas the 454A
has a useful 2mV/div. Go for the -A versions, which have 8 vertical
divisions - the non-A versions have 6 vertical divs.

With some custom chips, also consider a 7603 with 7B53A timebase and two
7A18 vertical amps. It has the flexibility of adding features from the vast
array of plugins as necessary. Basically a 75MHz instrument depending on
plugins. To get to 150MHz plus you'd need to get a 4-bay 7704A with 7B80/85
and two 7A26 for 200MHz bandwidth.

Closed auctions on eBay come up with:

7704A or 7603 with plugins - $60 to $120 (there are lots on there with silly
money tickets that never sell)
453 and 454 typically <$60. Wait for -A versions to appear, and expect to
pay 50% more.

And watch shipping cost, and bear in mind that inadequate packing by the
seller, and an ape man for the shipping company can reduce a scope to scrap
in short order. We've just taken delivery of an electronics box for a space
mission (not the flight version) from Finland via TNT. The custom shipping
container was dented, and the 75G shock sensor on the case had tripped -
they had basically thrown it into the truck, out of the truck, or dropped it
from a height. Fortunately the whole instrument is designed to take
significantly greater shock than that - up to 1000G (when explosive bolts
fire at various points during launch) - but if it had been a scope in a
cardboard box I'm not so sure it would have been at all in good shape.

Good luck with the search!

Craig


Re: Edge connectors for 7854

Stan & Patricia Griffiths
 

Hi Gordon,

 

I know a little about the TAS250 since I repaired about a hundred of them for Tektronix under contract.  What do you want to know?

 

Stan

 


From: TekScopes@... [mailto:TekScopes@...] On Behalf Of Gordon Hale
Sent: Saturday, May 21, 2011 3:51 PM
To: TekScopes@...
Subject: Re: [TekScopes] Edge connectors for 7854

 

 

What do you know about the TAS250? Thanks

Gordon Hale
Grand Prairie, Texas

Endeavor to Persevere

 

-----Original Message-----
From: Doug Hale To: TekScopes@...
Sent: Sat, May 21, 2011 5:48 pm
Subject: Re: [TekScopes] Edge connectors for 7854

 

I found the 80x2 here:
http://www.electronicsurplus.com/Item/4480/EDAC%20-%2080%20PIN%20EDGE%20CARD%20CONN%20-%20346-080-520-202/

Note: The checkout does not work with FireFox 4.01
Doug

On 5/21/2011 9:21 AM, David C. Partridge wrote:
> They do not have any .125" edge connectors and very few 0.1" and 0.15"
>
> D.

> -----Original Message-----
> From: TekScopes@... [mailto:TekScopes@...] On Behalf Of Tim Ostley
> Sent: 14 May 2011 10:55
> To: TekScopes@...
> Subject: Re: [TekScopes] Edge connectors for 7854
>
> Dear Dave,
>
> Try RS components (NOT Radio Shack!) or Farnell.
>
> http://uk.rs-online.com
>
> http://uk.farnell.com
>
> These are the UK sites - they do have international sites. I deal with both and within the UK they do next day delivery. They are not cheap!
>
> Hope this helps.
>
> Tim
> (in a sunny / showery Mid Wales)
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1375 / Virus Database: 1509/3651 - Release Date: 05/21/11
>
>


Newbie shopping questions

ab1jx
 

New to the group, not to the scopes. I used my first Tektronix about 1978, big beast on a cart with lots of tubes, never owned any other brand.

But now my 2213 is getting very dim. From Googling I guess there was a problem with the early 2213s and 2215s getting too much filament voltage to the CRT and wearing it out too fast. Mine never got modified and the inverter transformer doesn't have the -01 at the end of the number, so I guess it's been running at 7 volts all these years.

I'm looking for an analog scope maybe 100 or 150 MHZ although that speed is overkill for what I'd be using it for. I'm retired and a ham, mostly want to be able to see RF envelopes, don't often need to resolve individual cycles over 30 MHZ. The 2213 was a good fit, I just thought I'd move up a little since I've got to change.

I'm looking for a scope that's repairable (I don't mean broken). I read on some site that I think it was the 454 was the last model that didn't use proprietary Tektronix-made ICs. I don't have anything against them in principle, if they were guaranteed to be available for the next 30 years or so. I've seen Tek scopes still running at 50 years old, and I think not making parts available is just planned obsolescence. I don't want to play that game.

I'm hoping to not spend more than $200 and I'm hoping I can keep it running the rest of my lifetime (I'm 57).

I don't rule out digital absolutely, but the only one I've seen was new in the 80s (I think it was an HP) and all those pixels didn't seem very well suited to looking at envelopes. Plus if I got digital I'd expect to be able to get the data out to my PC (under Linux) and I'd rather not get involved in GPIB/HPIB cards.

So what's good, what's cheap, what's maintainable? Is there some file somewhere that lists years and model numbers? Any advice in general? Anybody know where I can get a CRT for my 2213? I've had really bad luck on eBay lately, it seems much worse than 10 years ago.

Oh, for more background on me see my bio on QRZ: http://www.qrz.com/db/AB1JX

Alan, AB1JX


7000 Series In Detroit?

art0matic
 

Does anybody here live around Detroit, Mi? I have some plug-ins I'd like to test, but no mainframe.

Art


Re: 1240 Logic Analyser display problem

Kevin Wood G7BCS
 

Have you tried disconnecting the VSYNC pin from the 5321 chip (i.e.
remove the chip if it's socketed) and then checking for a
short-to-ground, or any output from the (now floating) pin?
Ahh, good point. I should try that. It feeds the next stage through a 10k
resistor so unlikely it's being dragged down but you never know...

Personally, I'd swap the thing for a CPLD or a board-o'-TTL, but that's
only because I have copious stocks of both. A couple of TTL counters
(HC4040?) and comparators should just about do it.
Yep, the thought crossed my mind too. Actually, the H&V counters are
already on the board, thinking about it. Not sure I want to hack it about
that much though.

Kevin


Re: 1240 Logic Analyser display problem

Phil Pemberton
 

On 13/06/11 00:01, Kevin Wood wrote:
I'm thinking the MM5321 is dead, but just wondered if anyone else has been
down this path before, or has any other suggestions?
Have you tried disconnecting the VSYNC pin from the 5321 chip (i.e. remove the chip if it's socketed) and then checking for a short-to-ground, or any output from the (now floating) pin?

Personally, I'd swap the thing for a CPLD or a board-o'-TTL, but that's only because I have copious stocks of both. A couple of TTL counters (HC4040?) and comparators should just about do it.

But that's just me. I'll go for the crazy solution if it saves a trip to Ye Olde Parts Shoppe... :)

--
Phil.
ygroups@...
http://www.philpem.me.uk/


1240 Logic Analyser display problem

Kevin Wood G7BCS
 

Hi Guys,

I wonder if anyone has ever troubleshooted display issues with a 1240
Logic Analyser?

Symptoms are that I get a stable raster on the screen if brightness is
turned up but no display.

All power supply rails measure fine.

Both main and I/O processors seem to be going through their self tests
successfully and entering normal operation according to the LEDs on their
respective boards.

Display board gives HD sync output but no VD or luminance.
.
I've traced the VD output back to the MM5321 sync. generator IC on the
display board. It has a clock input, both power supply rails and the
vertical reset input is inactive (High). The horizontal outputs are
present but no vertical drive output.

I'm thinking the MM5321 is dead, but just wondered if anyone else has been
down this path before, or has any other suggestions?

Next question is where to find an MM5321. Littlediode have them at a
price, but any other ideas?

Thanks in advance,

Kevin


Re: 2430a battery and cal constants

jvanderwall1941
 

The supply impedance might matter. Does the scope have a high-impedance input with a switchable 50 ohm termination?

--- In TekScopes@..., Chris Moore <chris2phermoore@...> wrote:

I guess it would need to be a clean dc, though. Since I'm working on the only scope that I have, I have no way of knowing how clean it is. Filter caps shouldn't hurt anything.

--- On Sun, 6/12/11, Tom Miller <tmiller@...> wrote:


From: Tom Miller <tmiller@...>
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Sunday, June 12, 2011, 5:51 PM


 




With DC, it does not matter.
 
 
Tom
 
 

----- Original Message -----
From: Chris Moore
To: TekScopes@...
Sent: Sunday, June 12, 2011 1:41 PM
Subject: Re: [TekScopes] 2430a battery and cal constants

 











Hi Bob,
 
Thanks for your help.
No I don't think I do have access to a pg506. My scope isn't calibrated right now anyway, so I don't have anything to lose by trying a benchtop power supply. I just need to know how to hook it up. I was thinking about a cable with dual bnc on one end and positive and ground banana plugs on the other end. My concern is the impedence since the manual says to use a 50 ohm cable. Any suggestions?
 
Thanks,
Chris

--- On Sun, 6/12/11, Bob Koller <testtech@...> wrote:


From: Bob Koller <testtech@...>
Subject: Re: [TekScopes] 2430a battery and cal constants
To: "TekScopes@..." <TekScopes@...>
Date: Sunday, June 12, 2011, 2:27 PM


 



Chris, the levels must be quite accurate and stable, or the cal will fail. Can you borrow a Tek PG506 and mainframe?






From: Chris Moore <chris2phermoore@...>
To: TekScopes@...
Sent: Saturday, June 11, 2011 5:43 PM
Subject: Re: [TekScopes] 2430a battery and cal constants


 





Hello,
 
I finally got a battery and installed it. I powered up the scope and did a self cal. Now, all the startup diagnostics pass except the cal constants. I looked at the ext cal section of the manual and it said to connect a 50 ohm cable to both channels and a calibration generator. Can I just use a dual output supply with the right cable or cables.
 
Thanks,
Chris

--- On Mon, 5/30/11, DaveC <davec2468@...> wrote:


From: DaveC <davec2468@...>
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Monday, May 30, 2011, 4:53 PM


 

Tadiran makes a full-size AA 3.6v lithium that approximates the mAh
spec of the original in the 2430a.

After replacing that, Chris, simply follow the self-calibration
on-screen prompts. It asks for (if memory serves) a 5v input voltage
and a couple of other things and you're done.

When I replaced the battery in my 2430a I, too, thought I'd need to
do a full calibration, but it did not. Your scope may indeed be out
of calibration, but you don't need to do this just to get it back
into an "operable" state.

Just replace the battery, follow the on-screen calibration steps and
see what you get then. If you still need to do a full calib., so be
it. But I don't think you will.

Cheers,
Dave

-=-=-=-

Chris, If memory serves, you can use one of the 1/2AA size Tadiran
lithium batteries. Also, it will need a complete calibration, both
Internal and External. This is actually not difficult to do, but you
do need a calibration generator and the service manual. It may
require a couple of passes through the cal procedure. Did this
instrument work correctly before the battery died? Contact me off
list for more info.
-=-=-=-

Hello,

Would anyone happen to have the part number for a good replacement
battery for my 2430a. It seems the dead one that I removed is
obsolete. Also, since I'm sure that I've lost data, what is the
cheapest and easiest way of getting that back. Hopefully not
calibration, since that would be way out of my league and/or price
range. Any help for this beginner would be greatly appreciated.

Thanks in advance,
Chris


Re: Storing Scopes

bonddaleena@...
 

I have a significant number of both Tek gear and ham radios stored and never had a problem here in Florida with outside shed/workshop storage. Just buy a good supply of heavy duty plastic yard trash bags, and a couple of rolls of duct tape. After multiple layers of bags and tape, I always put a few "Decon" pellets in the outer layer and NEVER leave them at floor level. If you cannot 'burp' the air out of the inner bags, you are all set. Minimal air inside, of course. There is a company that makes those storage bags that you use with a vacuum cleaner. That would be the ultimate.
 
Works fer me!
 
ron
N4UE



-----Original Message-----
From: Peter Gottlieb
To: TekScopes
Sent: Sun, Jun 12, 2011 5:59 pm
Subject: Re: [TekScopes] Storing Scopes

I had stored some electronic gear in an outside shed and there was
significant corrosion due to condensation, spider webs, mud wasp nests,
and mouse damage. Of course, this was an outside shed in New York. Store
the same equipment in an outside shed in the Atacama desert and it would
be like a time capsule. The environment matters. Now when I need to
store anything I use environmentally controlled storage units.



On 6/12/2011 5:54 PM, Robert wrote:
>
> My Tek Scope collection somehow keeps growing and my garage is running
> out of room. Do any of you store scopes in an outside shed? If so any
> special considerations?
> Bob
>
>


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Re: 7D02 Personality Modules

Ivan Cousins
 

"custom hybrids 155-0230-00"
If I remember right, these hybrids are input ESD protection networks.
These were used to save space on the personality module board layouts.
They are resistors in series and Schottky diode clamps after the series resistors.
These would be easily duplicated with surface mount 1% (or even more %) resistors and some surface mount diodes.
I do not remember the exact circuit details for the hybrid.
This brings back memories.
PM109, MC68000, 10MHz clock speed, state machine design, all in a too small of a package and low power budget.
What a fun design that was. Would be easy to do now, with a single small FPGA.


Re: Storing Scopes

Peter Gottlieb <hpnpilot@...>
 

I had stored some electronic gear in an outside shed and there was significant corrosion due to condensation, spider webs, mud wasp nests, and mouse damage. Of course, this was an outside shed in New York. Store the same equipment in an outside shed in the Atacama desert and it would be like a time capsule. The environment matters. Now when I need to store anything I use environmentally controlled storage units.

On 6/12/2011 5:54 PM, Robert wrote:

My Tek Scope collection somehow keeps growing and my garage is running out of room. Do any of you store scopes in an outside shed? If so any special considerations?
Bob


Storing Scopes

Robert Simpson
 

My Tek Scope collection somehow keeps growing and my garage is running out of room. Do any of you store scopes in an outside shed? If so any special considerations?
Bob


Re: Tek calculator brochures

Stan & Patricia Griffiths
 

Kurt,

 

If you still have possession of the original Tek Calculator brochures, I think the Vintage Tek Museum can use them.  I am not aware that we have copies of ANY Tek Calc brochures.  I would be willing to pay the postage (Media Mail Rate) to get them sent to me, personally:

 

Stan Griffiths

18955 S.W. Blanton Street

Aloha, OR 97007-1230

 

Let me know how I can send you payment for postage . . . or . . . if you are so inclined, the Vintage Tek Museum is a 501(c)3 corporation and you can take a donation of those brochures off of you taxes!  All I have to do is write you an email thanking you for your contribution, you set a “value” on it, and file it with your 2011 taxes.  Let me know if you want me to write you a “thank you email” . . .

 

Stan Griffiths

President

VintageTek.org

 


From: TekScopes@... [mailto:TekScopes@...] On Behalf Of sipespresso
Sent: Friday, May 20, 2011 5:34 PM
To: TekScopes@...
Subject: [TekScopes] Tek calculator brochures

 

 

Folks,

I have some brochures for Tek calculators. Scans are here:
http://w140.com/tek_calc_brochures/

If anybody wants the originals and wants to pay for the shipping,
let me know.

Also free (you pay shipping) are the following paper manuals:

DM502
5A18N
21 and 31 Calculator
5B10N
5A21N
153 Calculator Instrumentation Interface
AF501
D10

and

Wavetek 147

Manuals I am looking for (so I can scan them for public use)
are listed here:
http://w140.com/tekwiki/wiki/List_of_manuals_that_are_needed

thanks, -Kurt


Re: Whither Veronia ?

Tim Phillips <tim@...>
 

from Tim P (UK)
sorry, people - I *meant* Vernonia, but somehow my bookmark was out of date.
thanks.
 



Re: 2430a battery and cal constants

Chris Moore <chris2phermoore@...>
 

I guess it would need to be a clean dc, though. Since I'm working on the only scope that I have, I have no way of knowing how clean it is. Filter caps shouldn't hurt anything.


--- On Sun, 6/12/11, Tom Miller wrote:

From: Tom Miller
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Sunday, June 12, 2011, 5:51 PM

 

With DC, it does not matter.
 
 
Tom
 
 
----- Original Message -----
Sent: Sunday, June 12, 2011 1:41 PM
Subject: Re: [TekScopes] 2430a battery and cal constants

 
Hi Bob,
 
Thanks for your help.
No I don't think I do have access to a pg506. My scope isn't calibrated right now anyway, so I don't have anything to lose by trying a benchtop power supply. I just need to know how to hook it up. I was thinking about a cable with dual bnc on one end and positive and ground banana plugs on the other end. My concern is the impedence since the manual says to use a 50 ohm cable. Any suggestions?
 
Thanks,
Chris

--- On Sun, 6/12/11, Bob Koller wrote:

From: Bob Koller
Subject: Re: [TekScopes] 2430a battery and cal constants
To: "TekScopes@..."
Date: Sunday, June 12, 2011, 2:27 PM

 
Chris, the levels must be quite accurate and stable, or the cal will fail. Can you borrow a Tek PG506 and mainframe?


From: Chris Moore To: TekScopes@...
Sent: Saturday, June 11, 2011 5:43 PM
Subject: Re: [TekScopes] 2430a battery and cal constants

 
Hello,
 
I finally got a battery and installed it. I powered up the scope and did a self cal. Now, all the startup diagnostics pass except the cal constants. I looked at the ext cal section of the manual and it said to connect a 50 ohm cable to both channels and a calibration generator. Can I just use a dual output supply with the right cable or cables.
 
Thanks,
Chris

--- On Mon, 5/30/11, DaveC wrote:

From: DaveC
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Monday, May 30, 2011, 4:53 PM

 
Tadiran makes a full-size AA 3.6v lithium that approximates the mAh
spec of the original in the 2430a.

After replacing that, Chris, simply follow the self-calibration
on-screen prompts. It asks for (if memory serves) a 5v input voltage
and a couple of other things and you're done.

When I replaced the battery in my 2430a I, too, thought I'd need to
do a full calibration, but it did not. Your scope may indeed be out
of calibration, but you don't need to do this just to get it back
into an "operable" state.

Just replace the battery, follow the on-screen calibration steps and
see what you get then. If you still need to do a full calib., so be
it. But I don't think you will.

Cheers,
Dave

-=-=-=-

>Chris, If memory serves, you can use one of the 1/2AA size Tadiran
>lithium batteries. Also, it will need a complete calibration, both
>Internal and External. This is actually not difficult to do, but you
>do need a calibration generator and the service manual. It may
>require a couple of passes through the cal procedure. Did this
>instrument work correctly before the battery died? Contact me off
>list for more info.

-=-=-=-

>Hello,
>
>Would anyone happen to have the part number for a good replacement
>battery for my 2430a. It seems the dead one that I removed is
>obsolete. Also, since I'm sure that I've lost data, what is the
>cheapest and easiest way of getting that back. Hopefully not
>calibration, since that would be way out of my league and/or price
>range. Any help for this beginner would be greatly appreciated.
>
>Thanks in advance,
>Chris



Re: 2430a battery and cal constants

Tom Miller <tmiller@...>
 


With DC, it does not matter.
 
 
Tom
 
 

----- Original Message -----
Sent: Sunday, June 12, 2011 1:41 PM
Subject: Re: [TekScopes] 2430a battery and cal constants

 

Hi Bob,
 
Thanks for your help.
No I don't think I do have access to a pg506. My scope isn't calibrated right now anyway, so I don't have anything to lose by trying a benchtop power supply. I just need to know how to hook it up. I was thinking about a cable with dual bnc on one end and positive and ground banana plugs on the other end. My concern is the impedence since the manual says to use a 50 ohm cable. Any suggestions?
 
Thanks,
Chris

--- On Sun, 6/12/11, Bob Koller wrote:

From: Bob Koller
Subject: Re: [TekScopes] 2430a battery and cal constants
To: "TekScopes@..."
Date: Sunday, June 12, 2011, 2:27 PM

 
Chris, the levels must be quite accurate and stable, or the cal will fail. Can you borrow a Tek PG506 and mainframe?


From: Chris Moore
To: TekScopes@...
Sent: Saturday, June 11, 2011 5:43 PM
Subject: Re: [TekScopes] 2430a battery and cal constants

 
Hello,
 
I finally got a battery and installed it. I powered up the scope and did a self cal. Now, all the startup diagnostics pass except the cal constants. I looked at the ext cal section of the manual and it said to connect a 50 ohm cable to both channels and a calibration generator. Can I just use a dual output supply with the right cable or cables.
 
Thanks,
Chris

--- On Mon, 5/30/11, DaveC wrote:

From: DaveC
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Monday, May 30, 2011, 4:53 PM

 
Tadiran makes a full-size AA 3.6v lithium that approximates the mAh
spec of the original in the 2430a.

After replacing that, Chris, simply follow the self-calibration
on-screen prompts. It asks for (if memory serves) a 5v input voltage
and a couple of other things and you're done.

When I replaced the battery in my 2430a I, too, thought I'd need to
do a full calibration, but it did not. Your scope may indeed be out
of calibration, but you don't need to do this just to get it back
into an "operable" state.

Just replace the battery, follow the on-screen calibration steps and
see what you get then. If you still need to do a full calib., so be
it. But I don't think you will.

Cheers,
Dave

-=-=-=-

>Chris, If memory serves, you can use one of the 1/2AA size Tadiran
>lithium batteries. Also, it will need a complete calibration, both
>Internal and External. This is actually not difficult to do, but you
>do need a calibration generator and the service manual. It may
>require a couple of passes through the cal procedure. Did this
>instrument work correctly before the battery died? Contact me off
>list for more info.

-=-=-=-

>Hello,
>
>Would anyone happen to have the part number for a good replacement
>battery for my 2430a. It seems the dead one that I removed is
>obsolete. Also, since I'm sure that I've lost data, what is the
>cheapest and easiest way of getting that back. Hopefully not
>calibration, since that would be way out of my league and/or price
>range. Any help for this beginner would be greatly appreciated.
>
>Thanks in advance,
>Chris



Re: 2430a battery and cal constants

Chris Moore <chris2phermoore@...>
 

Hi Bob,
 
Thanks for your help.
No I don't think I do have access to a pg506. My scope isn't calibrated right now anyway, so I don't have anything to lose by trying a benchtop power supply. I just need to know how to hook it up. I was thinking about a cable with dual bnc on one end and positive and ground banana plugs on the other end. My concern is the impedence since the manual says to use a 50 ohm cable. Any suggestions?
 
Thanks,
Chris


--- On Sun, 6/12/11, Bob Koller <testtech@...> wrote:

From: Bob Koller
Subject: Re: [TekScopes] 2430a battery and cal constants
To: "TekScopes@..."
Date: Sunday, June 12, 2011, 2:27 PM

 
Chris, the levels must be quite accurate and stable, or the cal will fail. Can you borrow a Tek PG506 and mainframe?


From: Chris Moore <chris2phermoore@...>
To: TekScopes@...
Sent: Saturday, June 11, 2011 5:43 PM
Subject: Re: [TekScopes] 2430a battery and cal constants

 
Hello,
 
I finally got a battery and installed it. I powered up the scope and did a self cal. Now, all the startup diagnostics pass except the cal constants. I looked at the ext cal section of the manual and it said to connect a 50 ohm cable to both channels and a calibration generator. Can I just use a dual output supply with the right cable or cables.
 
Thanks,
Chris

--- On Mon, 5/30/11, DaveC wrote:

From: DaveC
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Monday, May 30, 2011, 4:53 PM

 
Tadiran makes a full-size AA 3.6v lithium that approximates the mAh
spec of the original in the 2430a.

After replacing that, Chris, simply follow the self-calibration
on-screen prompts. It asks for (if memory serves) a 5v input voltage
and a couple of other things and you're done.

When I replaced the battery in my 2430a I, too, thought I'd need to
do a full calibration, but it did not. Your scope may indeed be out
of calibration, but you don't need to do this just to get it back
into an "operable" state.

Just replace the battery, follow the on-screen calibration steps and
see what you get then. If you still need to do a full calib., so be
it. But I don't think you will.

Cheers,
Dave

-=-=-=-

>Chris, If memory serves, you can use one of the 1/2AA size Tadiran
>lithium batteries. Also, it will need a complete calibration, both
>Internal and External. This is actually not difficult to do, but you
>do need a calibration generator and the service manual. It may
>require a couple of passes through the cal procedure. Did this
>instrument work correctly before the battery died? Contact me off
>list for more info.

-=-=-=-

>Hello,
>
>Would anyone happen to have the part number for a good replacement
>battery for my 2430a. It seems the dead one that I removed is
>obsolete. Also, since I'm sure that I've lost data, what is the
>cheapest and easiest way of getting that back. Hopefully not
>calibration, since that would be way out of my league and/or price
>range. Any help for this beginner would be greatly appreciated.
>
>Thanks in advance,
>Chris



Re: Whither Veronia ?

mda231
 

Try this address, Tim. It's for "Vernonia", rather than "Veronia":

http://www.vernonianorthern.com/TekParts/TekParts.php

MDA.

--- In TekScopes@..., "Tim Phillips" <tim@...> wrote:

from Tim P (UK)
What has happened to Veronia (Tek parts)
The web site seems broken / gone.

Tim


Re: 2430a battery and cal constants

gwangju3 <gwangju3@...>
 

No need for a dual output supply. You only need one voltage at a time. Connect one Power Supply output to a large electrolytic, a few thousand uF, and a 0.1 to 1.0uf ceramic in parallel. Use this as the calibration voltage. Set and monitor using a good meter.

Not NIST or a "Cal" I would sell to customer but enough to get a hobbyist going on verifying that the scope actually works.

--Victor

--- In TekScopes@..., Bob Koller <testtech@...> wrote:

Chris, the levels must be quite accurate and stable, or the cal will fail. Can you borrow a Tek PG506 and mainframe?



________________________________
From: Chris Moore <chris2phermoore@...>
To: TekScopes@...
Sent: Saturday, June 11, 2011 5:43 PM
Subject: Re: [TekScopes] 2430a battery and cal constants


 
Hello,
 
I finally got a battery and installed it. I powered up the scope and did a self cal. Now, all the startup diagnostics pass except the cal constants. I looked at the ext cal section of the manual and it said to connect a 50 ohm cable to both channels and a calibration generator. Can I just use a dual output supply with the right cable or cables.
 
Thanks,
Chris

--- On Mon, 5/30/11, DaveC <davec2468@...> wrote:


From: DaveC <davec2468@...>
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Monday, May 30, 2011, 4:53 PM


 
Tadiran makes a full-size AA 3.6v lithium that approximates the mAh
spec of the original in the 2430a.

After replacing that, Chris, simply follow the self-calibration
on-screen prompts. It asks for (if memory serves) a 5v input voltage
and a couple of other things and you're done.

When I replaced the battery in my 2430a I, too, thought I'd need to
do a full calibration, but it did not. Your scope may indeed be out
of calibration, but you don't need to do this just to get it back
into an "operable" state.

Just replace the battery, follow the on-screen calibration steps and
see what you get then. If you still need to do a full calib., so be
it. But I don't think you will.

Cheers,
Dave

-=-=-=-

Chris, If memory serves, you can use one of the 1/2AA size Tadiran
lithium batteries. Also, it will need a complete calibration, both
Internal and External. This is
actually not difficult to do, but you
do need a calibration generator and the service manual. It may
require a couple of passes through the cal procedure. Did this
instrument work correctly before the battery died? Contact me off
list for more info.
-=-=-=-

Hello,

Would anyone happen to have the part number for a good replacement
battery for my 2430a. It seems the dead one that I removed is
obsolete. Also, since I'm sure that I've lost data, what is the
cheapest and easiest way of getting that back. Hopefully not
calibration, since that would be way out of my league and/or price
range. Any help for this beginner would be greatly appreciated.

Thanks in advance,
Chris


Re: 2430a battery and cal constants

Bob Koller <testtech@...>
 

Chris, the levels must be quite accurate and stable, or the cal will fail. Can you borrow a Tek PG506 and mainframe?


From: Chris Moore
To: TekScopes@...
Sent: Saturday, June 11, 2011 5:43 PM
Subject: Re: [TekScopes] 2430a battery and cal constants

 
Hello,
 
I finally got a battery and installed it. I powered up the scope and did a self cal. Now, all the startup diagnostics pass except the cal constants. I looked at the ext cal section of the manual and it said to connect a 50 ohm cable to both channels and a calibration generator. Can I just use a dual output supply with the right cable or cables.
 
Thanks,
Chris

--- On Mon, 5/30/11, DaveC wrote:

From: DaveC
Subject: Re: [TekScopes] 2430a battery and cal constants
To: TekScopes@...
Date: Monday, May 30, 2011, 4:53 PM

 
Tadiran makes a full-size AA 3.6v lithium that approximates the mAh
spec of the original in the 2430a.

After replacing that, Chris, simply follow the self-calibration
on-screen prompts. It asks for (if memory serves) a 5v input voltage
and a couple of other things and you're done.

When I replaced the battery in my 2430a I, too, thought I'd need to
do a full calibration, but it did not. Your scope may indeed be out
of calibration, but you don't need to do this just to get it back
into an "operable" state.

Just replace the battery, follow the on-screen calibration steps and
see what you get then. If you still need to do a full calib., so be
it. But I don't think you will.

Cheers,
Dave

-=-=-=-

>Chris, If memory serves, you can use one of the 1/2AA size Tadiran
>lithium batteries. Also, it will need a complete calibration, both
>Internal and External. This is actually not difficult to do, but you
>do need a calibration generator and the service manual. It may
>require a couple of passes through the cal procedure. Did this
>instrument work correctly before the battery died? Contact me off
>list for more info.

-=-=-=-

>Hello,
>
>Would anyone happen to have the part number for a good replacement
>battery for my 2430a. It seems the dead one that I removed is
>obsolete. Also, since I'm sure that I've lost data, what is the
>cheapest and easiest way of getting that back. Hopefully not
>calibration, since that would be way out of my league and/or price
>range. Any help for this beginner would be greatly appreciated.
>
>Thanks in advance,
>Chris


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