Date   

Re: Radioactivity in old instruments?

Mattias Rickardsson
 

From: Ashton Brown <ashton@vom.com>
Subject: Re: Radioactivity in old instruments?

My semi-educated guess re specifically, a 519 would be:

As previously mentioned on the list, many were used re nuclear
detonations. I gather from anecdotal implication ==> these were placed
near-enough to actual blast, so as to capture a single spike..
nanoseconds before that signal source itself and a fair length of the
signal cable: were returned to the Cosmos, as leptons.

If the scope was in a bunker of less-than optimum shielding (to save $$)
-?- the scope itself might have had induced radioactivity. Would be an
interesting trip through the Table of Nuclides to guesstimate the
half-lives within such a horrifying soup of incident particles --
especially 40 years later.
Digesting today's Tek mails as lavatory reading on my laptop via wireless
LAN connection while... "powdering my nose", or whatever it's called in
this shy language... I suddenly realize that I might even be in deeper shit
than I expected.

Right outside this bathroom door stands three 519s in unknown conditions
and with unknown pasts. If I open the door and go out, this might be the
last message from me before I'm united with the Cosmos!

I'd be most interested to hear results (my ~game in a former life):
if anyone has both a 519 and a decent thin-window alpha/beta/gamma
geiger counter (several very clever and small ones have been made in
last decade - I have 3; one does stats as can be tallied internally or
via an external counter for advanced stat analysis. Another connects to
a DOS box /serial port for painless long-term accumulations).
Best to do a 24 hr. cosmic-ray background average and note the
difference VS near-to or inside the 519 box. I suspect that this will
prove to be entirely negligible in 7/04.. but I could be Wrong, as the
exact placement of a 519 between <vapourised leptonization> -and-
<heavy irradiation> is completely unknowable data.
Hallo? Does anybody in or around northern Europe have a geiger counter to
lend me for a while? Halloooo?

But wait - I'd have to open that door to use it... so... maybe a web
service would be better? Geiger-counter Java applets, anyone?

;-)


/mr


Manuals needed for 492AP / 2755AP

phila_renewal
 

Still looking for service / ops manuals for 492AP or 2755AP. Dave
(aa4df)* and John Dosher* have 492P or 494P manuals, but no one
seems to have 492AP or 494AP manuals.

Can anyone in the group shed a little more light on the Tek SA
saga. I understand from Stan's prior posts that the 2755AP is the
same as the 492AP, and possibly that the 2755AP is also the same as
the 494AP, but less the 10Hz rb filter and OCXO reference. Would
the 492P or 494P service manuals match up to the 492AP / 2755AP
inards? If not, any suggestions for where I could get the "A"
suffix manuals on CD?

Thanks to all for your help.

(*PS: from a satified customer -- both Dave at aa4DF, and John
Dosher have excellent manuals -- helped to bring back a couple of
old otherwise boat anchors / door-stops)


Working 661 and plugins

charlesmorris@...
 

I have a working 661 sampling scope with 4S1 (0.35 ns/1 GHz) and 5T3 plugins. Although it's neat to play with on the bench observing sub-nanosecond avalanche risetimes and VHF sinewaves, I really don't have any use for it, and too many other projects... anyone interested in buying it? Shipping would probably be substantial (I'm located near West Plains, MO for pickup).
-Charles


Re: 7603 Modification

david@...
 

There is a modification required on the 7603 to enable the plug-in
pushbuttons to illuminate.
Does anyone have any info on this mod?
Stan Griffiths answered this question back in 2002, see below.

I think it would be a good idea to run the lamps on a lower voltage since
they are so hard to change in most of the plugins.

David DiGiacomo

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

To: TekScopes@yahoogroups.com
From: w7ni@easystreet.com (Stan or Patricia Griffiths)
Date: Mon, 21 Jan 2002 17:14:49 -0800
Subject: Re: 7603 lights power supply

The 040-0686-01 mod kit for 7600 series plugin lamps uses an LM309K
between +8 volts in the mainframe and +5 delivered to the plugin
compartments for lamp power. Derating of the range of acceptable line
voltages and operating temperature of the scope are required if the total
plugin lamp current exceeds 1.5 amps. You just add up the lamp current
requirements of each plugin to see if it exceeds 1.5 amps to know if you
have to derate line voltage or temperature specs. The total kit
instructions are on 7 pages of microfiche and installation instructions
and a parts list are included along with a derating chart. I can provide
hard copies of the instructions for 50 cents per page plus $1 for postage
(total = $4.50).

Stan
w7ni@easystreet.com


7603 Modification

trigview
 

There is a modification required on the 7603 to enable the plug-in
pushbuttons to illuminate.
Does anyone have any info on this mod?
Thanks, Joe


Tek R564B w/ 3A3 & 2B67 anyone interested?

grn_onions
 

Hello all,
I picked up a decent, funtional R564B storage scope
that needs minor work. Has nice green trace, and
camera mounting adapter. Included is a 3A3 dual trace
differential amplifier, and 2B67 time base. Asking
$75 plus shipping. Shipping will cost almost as much
as scope so if you live near Houston, Austin, or
Dallas, Texas you could come pick it up to save $$$.
If I do not get any bites on this scope by next
weekend, I will probably part it out. If you are
needing parts for this model still send me emails with
needs. PIC available.
Also picked up 7A16P fair shape, selling As-Is for
$20 plus shipping, and have a parts 7A16P (no rails or
back plastic), missing couple IC's for $10, or both
for $25.
Off Tek item: Decent, working HP3455A digital
voltmeter (bench or rack) if anyone interested, make
offer.

Later,
Matt Potter




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Re: 545B info wanted

Deane E. Kidd <dektyr@...>
 

Hi Morris:
If I had the transformer number, I could provide you the winding data. As with all things of Tek, the part number is all important. Should be 120-zzzz-xx.
Deane

----- Original Message -----
From: Morris Odell
To: TekScopes@yahoogroups.com
Sent: Sunday, July 25, 2004 4:05 PM
Subject: [TekScopes] 545B info wanted


Hi all,

I have a power transformer from a late model 545B, the one with the
combined fuse holder and mains voltage adjuster on the rear panel of the
scope. I need a listing of the windings and terminal numbers. The only
manual I have been able to find is the one on BAMA which is for an
earlier model. It's helpful but not enough. It seems the power supply
underwent some modification late in the design life of this model.

Thanks,

Morris



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Type 3B5 Programmable Plugin

j.foster <j.foster@...>
 

Greetings All:

Does anybody have one of these plugins that they are prepared to part with? I have a lonely
3A5 looking for a mate :-)

Regards: John Foster VK2ZJF.


545B info wanted

Morris Odell <morriso@...>
 

Hi all,

I have a power transformer from a late model 545B, the one with the
combined fuse holder and mains voltage adjuster on the rear panel of the
scope. I need a listing of the windings and terminal numbers. The only
manual I have been able to find is the one on BAMA which is for an
earlier model. It's helpful but not enough. It seems the power supply
underwent some modification late in the design life of this model.

Thanks,

Morris



* * * CONFIDENTIAL * * *
The information in this message and in any attachments may be
confidential. If you are not the intended recipient of this message,
you must not read, forward, disclose, or use in any way the
information this message or any attachment contains. If you are not the
intended recipient, please notify the sender immediately and delete
or destroy all copies of this message and any attachments.


Re: Radioactivity in old instruments?

Ashton Brown <ashton@...>
 

My semi-educated guess re specifically, a 519 would be:

As previously mentioned on the list, many were used re nuclear detonations. I gather from anecdotal implication ==> these were placed near-enough to actual blast, so as to capture a single spike.. nanoseconds before that signal source itself and a fair length of the signal cable: were returned to the Cosmos, as leptons.

If the scope was in a bunker of less-than optimum shielding (to save $$) -?- the scope itself might have had induced radioactivity. Would be an interesting trip through the Table of Nuclides to guesstimate the half-lives within such a horrifying soup of incident particles --
especially 40 years later.

I'd be most interested to hear results (my ~game in a former life):
if anyone has both a 519 and a decent thin-window alpha/beta/gamma geiger counter (several very clever and small ones have been made in last decade - I have 3; one does stats as can be tallied internally or via an external counter for advanced stat analysis. Another connects to a DOS box /serial port for painless long-term accumulations). Best to do a 24 hr. cosmic-ray background average and note the difference VS near-to or inside the 519 box. I suspect that this will prove to be entirely negligible in 7/04.. but I could be Wrong, as the exact placement of a 519 between <vapourised leptonization> -and- <heavy irradiation> is completely unknowable data.

PS- the picoCuries within a neon -23 envelope is, trust me: negligible. No cause for night sweats. My collection of Am-242 sources from smoke detectors produces an awesome geiger response: all alphas - a sheet of paper drops it to about background. Don't EAT or inject this stuff...

So then, the disclaimer on a particular 519 - might mean nothing more than:
This unit was Not purchased by the AEC / is known not to have been used for that particular purpose. (How can you prove a Negative, though. cf. ontological proof of Gawd.)


Ashton, gruntled member of the Self-immolation Species.

Hmmmm.. a 519 owner just might possess Hard Evidence (admissible in Intergalactic Court) of the terminal madness of this species.
Never mind your CC-limit: this one's Priceless.


maddisassembler wrote:

July 25th, 2004


Hello all,

the sentence below brought back to my
mind that since a long time I have
the impression that in rare cases
radioactively infested instruments
may make their way to our benches.

I myself have no such item (checked with
a Geiger counter) but have heard of such
cases and also I was offered a 519 of
which the seller said "I guarantee that
it is free of radioactivity".

What do you think about this?

Regards
-Roland




in Melbourne Australia. I've heard tales of "piles" of them
appearing

at junk sales in Oz years ago but have never heard of anyone with
another one down here.

Nuclear testing in Australia was done by the British - maybe they
bought in 519s for the purpose but probably not. Having worked on
it

occasionally, I like the idea of 1950s British electronics
(Solartron, Eddystone, Marconi etc) getting blown up when the
gadget

went off :-)


Uncle Fester for President!
We want him too! - we're having an election soon :-)

Morris




Yahoo! Groups Links







Re: Tek 4041 controller / details

maddisassembler
 

July 25th, 2004


Erik,


I actually have a 4041 with serial # B051354
and I have the ROM drawer.

From what I know after serial # B070100
'option 10' all ROMs are integrated
on the main board so you will not need any
drawer.

Might be someone from the group can confirm
this.

I have no keyboard and start my 4041 with
a program on tape. This program redirects
the console (which would be the -absent-
keyboard) to the serial port of the 4041.
With a PC and a proper terminal program you
can then use your PC screen & keyboard as
the 4041 console.

From my point of view you need the
following to get started:

1. A DC-100A tape with the redirection
program on it (DC-100A cartriges are
extremely hard to find these days -
only 160 KILO byte of storage). You
need someone with a working 4041 to
write this program to your tape.

2. A serial connection from your PC
to your 4041 and a terminal program
(e.g. HYPERTERMINAL) on your PC

3. Information/Manuals on how the 4041
and its BASIC work so you can do your
first steps with it.


Best regards
-Roland




--- In TekScopes@yahoogroups.com, "Elbicon mfg co" <elbicon@p...>
wrote:
Hello Roland,

Does this mean that you can actually program your 4041 without a
rom drawer ?
my 4041 has serial number : B071598 and option 01 / 30 / 10
so if I check with tha catalog is has the programming option 30 ,
but no rom drawer , in fact it is sealed
with some sort of silicone glue..

Do i need the keyboard , is there a way to adapt a standard
keyboard ?

Many thanks for your help,

I 'd love to get the 4041 up and running , seems more my style of
programming for a straightforward application
than Natinstr Labwindows etc , which i have running now .

Erik Paret


Re: tek 4041 controller

Elbicon mfg co <elbicon@...>
 

Hello Roland,

Does this mean that you can actually program your 4041 without a rom drawer ?
my 4041 has serial number : B071598 and option 01 / 30 / 10
so if I check with tha catalog is has the programming option 30 , but no rom drawer , in fact it is sealed
with some sort of silicone glue..

Do i need the keyboard , is there a way to adapt a standard keyboard ?

Many thanks for your help,

I 'd love to get the 4041 up and running , seems more my style of programming for a straightforward application
than Natinstr Labwindows etc , which i have running now .

Erik Paret

----- Original Message -----
From: maddisassembler
To: TekScopes@yahoogroups.com
Sent: Sunday, July 25, 2004 4:13 PM
Subject: [TekScopes] Re: Tek 4041 controller


July 25th, 2004


Dave,

does this mean that the 4041 was
a complicated item to really finish
and get out to the customer?

I operate one with a serial connection
to my PC and that way (via 4041 basic)
I run a complete rack of GPIB instruments.

Also, I think it depends on the serial number
(in other words: age) if you need the ROM drawer
or if this software is already integrated into
firmware.

Regards
-Roland



--- In TekScopes@yahoogroups.com, "David Wise" <david_wise@p...>
wrote:
> Sorry, I don't have what you want, but I do have a
> small memory to share. I worked in T&D (Terminals
> and Displays), which was near the department that
> made the 4041. I gather they had a hard time getting
> it through the final stages of the internal "Product
> Shipment Release" review process, because one engineer's
> cube sported a poster of the end of a marathon, exhausted,
> sweat-dripping runners breaking the tape and collapsing.
> Someone had taken a marker and captioned it: "4041 PSR".
>
> Dave Wise



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Re: Serial numbers / IL =Israel

maddisassembler
 

July 25th, 2004


Just to add:

I have an AFG5101 Funtion gen. with
serial IL11119 which is ISRAEL

Regards
-Roland


Denis, I think you are mistaken in some of these S/N series. Unless
I
am too, 100XXX was Guernsey, 200XXX and E200XXX was UK, 300XXX (and
possibly J300XXX) was Japan, 700XXX and H700XXX was Heerenveen.
/Zenith, Sweden


Radioactivity in old instruments?

maddisassembler
 

July 25th, 2004


Hello all,

the sentence below brought back to my
mind that since a long time I have
the impression that in rare cases
radioactively infested instruments
may make their way to our benches.

I myself have no such item (checked with
a Geiger counter) but have heard of such
cases and also I was offered a 519 of
which the seller said "I guarantee that
it is free of radioactivity".

What do you think about this?

Regards
-Roland



in Melbourne Australia. I've heard tales of "piles" of them
appearing
at junk sales in Oz years ago but have never heard of anyone with
another one down here.

Nuclear testing in Australia was done by the British - maybe they
bought in 519s for the purpose but probably not. Having worked on
it
occasionally, I like the idea of 1950s British electronics
(Solartron, Eddystone, Marconi etc) getting blown up when the
gadget
went off :-)

Uncle Fester for President!
We want him too! - we're having an election soon :-)

Morris


Re: tek 4041 controller

maddisassembler
 

July 25th, 2004


Dave,

does this mean that the 4041 was
a complicated item to really finish
and get out to the customer?

I operate one with a serial connection
to my PC and that way (via 4041 basic)
I run a complete rack of GPIB instruments.

Also, I think it depends on the serial number
(in other words: age) if you need the ROM drawer
or if this software is already integrated into
firmware.

Regards
-Roland



--- In TekScopes@yahoogroups.com, "David Wise" <david_wise@p...>
wrote:
Sorry, I don't have what you want, but I do have a
small memory to share. I worked in T&D (Terminals
and Displays), which was near the department that
made the 4041. I gather they had a hard time getting
it through the final stages of the internal "Product
Shipment Release" review process, because one engineer's
cube sported a poster of the end of a marathon, exhausted,
sweat-dripping runners breaking the tape and collapsing.
Someone had taken a marker and captioned it: "4041 PSR".

Dave Wise


Re: 465B Manuals

regman10
 

I paid 50 bucks for mine, but it's in good shape. I can't answer your other
question - maybe Stan knows. I have 4 465B's (3 w/DM44) and they all look
pretty similar to me.

-----Original Message-----
From: Howard Matthews [mailto:hedgewarden@yahoo.com]
Sent: Saturday, July 24, 2004 10:28 PM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] 465B Manuals


Two 465B manuals recently finished on eBay within an hour of each
other. One manual was titled only "465B", the other was titled, to
the effect "465B with options, Serial Numbers B060000 and up"

The first finished at $10, the second at $31. Other than the first
manual looking like it had been run over by an HP delivery truck,
and the second looking like it had been printed last week, is there
another reason for the different values?

My real question is, did the 465B model change significantly with
serial number B060000 like the old 453 did with serial number
20000? Is the older manual of much use for the later scopes of that
model?

Or was it the "with options" that made the latter manual worth three
times as much?

-Howard


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465B Manuals

Howard Matthews
 

Two 465B manuals recently finished on eBay within an hour of each
other. One manual was titled only "465B", the other was titled, to
the effect "465B with options, Serial Numbers B060000 and up"

The first finished at $10, the second at $31. Other than the first
manual looking like it had been run over by an HP delivery truck,
and the second looking like it had been printed last week, is there
another reason for the different values?

My real question is, did the 465B model change significantly with
serial number B060000 like the old 453 did with serial number
20000? Is the older manual of much use for the later scopes of that
model?

Or was it the "with options" that made the latter manual worth three
times as much?

-Howard


Re: Tektronix 317 Question (NE-23 vs NE-2 Neon Lamps)

Robert Morein <morepub@...>
 

The dot is not the source.
The gas fill in the NE-23 contains a radioactive fraction.
In any neon bulb, there is a hystesis effect, ie., a difference between turn-on and turn-off voltage.
Since these bulbs were frequently used as voltage clamps, hysteresis was considered undesirable.
The radioactive fraction reduces the difference by supplying an internal source of ionization.

----- Original Message -----
From: Stan & Patricia Griffiths
To: Carl E. Davidson
Cc: TekScopes
Sent: Friday, July 23, 2004 6:33 PM
Subject: [TekScopes] Re: Tektronix 317 Question (NE-23 vs NE-2 Neon Lamps)


Hi Carl,

The main difference between NE-2's and N-23's is that the NE-23's had a small dot of radioactive material painted on them during the manufacturing process to help them "fire". NE-2's tended to not "light" sometimes, even when the proper voltages were applied. So the switch from NE-2 to NE-23 in most applications was because of reliability. This means NE-2's will generally work just fine in place of NE-23's. I suspect today's extreme environmentalists dislike the radioactivity associated with NE-23's which is probably why you can't find them anymore.

Stan
w7ni@easystreet.com

----- Original Message -----
From: Carl E. Davidson
To: Stan Griffiths
Sent: Sunday, July 18, 2004 2:29 PM
Subject: Tektronix 317 Question (NE-23 vs NE-2 Neon Lamps)


Hi Stan:

Can you answer the following question about the 317:

NE-23 vs NE-2 Neon Lamps for Preventing Grid-to-Cathode Shorts
While looking through the 317 modification summary I
came across a mod (# 9464) where they're adding a
NE-23 neon lamp between the grid and cathode of V43A,
to prevent a possible grid-to-cathode short. I understand
how this works - my question is can a NE-2 be used in place
of an NE-23 in this application. NE-2s are still readily available
everywhere, but I have be unable to locate any NE-23s.

Regards,
Carl






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Re: Serial numbers

Brian Goldsmith <brian.goldsmith@...>
 

-----Original Message-----
From: Stan & Patricia



Craig Sawyers wrote:-
>With an odd and rather nice statistical quirk, my UK-built 575 curve
>Tracer is serial number 100575.

That serial number for a 575 sounds like one made in Japan, at
Sony-Tektronix . . . maybe . . .

Stan
w7ni@easystreet.com


***** My 575 is Serial number 100391 and has Tektronix Guernsey displayed on
the front panel.It is the 50 Hz 100/200 steps/sec. version (also fitted with
Mod122C) and is ,I assume,identical to Craigs machine.

Brian Goldsmith.


Re: Type 519 scope S/Ns

Paul Edstrom <pauledst@...>
 

For those interested and tallying S/Ns my 519 is:

1062 (scope), 9846 (CRT)

It even still has a small coil of silver bearing solder inside. At least thats what it says on the chassis next to where its attached.
Been looking for that wood cased accessory set.... :-P

Paul

My Type 519 serial numbers are:

528 (scope), 2078 (CRT)
851 (scope), 33492 (CRT) (Quite high number for the CRT!)
157 (scope), _____ (CRT) (CRT serial not filled in!)


/mr

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