Date   

Re: 453 Subtypes.

va7jr
 

Certainly not expert advice, but:

My 453 is a model 703K. I was under the assumtion that the 703K was a scope
modified for the military. I was told the larger CRT was the defining
difference. I have a stick on label giving the following information

Mil-0-9960C (USAF), Type 1

Tektronix Inc
F41608-73D-8073
6625-115-2587
Serial B021360

I have the grey and red knobs on mine.

The differences that I have noted include:

Larger CRT like 453A
No side panel for calibrator etc.
Calibrator circuit is different than the standard 453

So far the only difference electronically that I have encountered is the
calibrator circuit.

I'll be interested in your findings.

Jim

_____

From: Howard Matthews [mailto:hedgewarden@yahoo.com]
Subject: [TekScopes] 453 Subtypes.


Expert info solicited:

My collection of 453's continues to expand faster than I can fix
them. But, I just realized with a recent acquisition that one of my
theories (and previous posts) is totally wrong.

I know 453's underwent major redesign with serial number 20,000.
But outwardly they look the same from the front - the power cord
became permanently attached at the back.

More curiously, there are some 453's that have the front panel and
larger CRT face of the 453A's. Besides the larger CRT, the another
obvious feature is the use of color on the faceplate to define the
functional areas of the controls. And, some controls had to move
around to make room for the larger CRT.

These interspecies 453's look much more like 453A's than their
cospecifics. Larger CRT, colored faceplate fuctional areas. But
they use knobs of the older order - black and red - rather then the
453A's more handsome grey and red knobs.

The first interspecies 453 I obtained was slugged a mod703K - so I
assumed that was the the defining difference. Then I got a mod703H
with those interspecies characteristics (i.e. larger CRT, colored
areas on the face plate to delineate functional areas, etc.)

So, now, I'm like curious and checked my other 453's. "Low and
behold" as they used to say, I have an older style 453 (small CRT,
no colored areas) with a mod703H slug.

Conclusion - mod703H or K was NOT the defining difference! My
theory, and previous post, was WRONG.

AGHGHGH!

Now I have a new hypothesis. My two examples of interspecies 453
all have serial numbers Bxxxxxx. All my old style 453's, pre and
post 20K, have serial numbers without the "B" Beaverton appellation.

Can anyone verify or refute my hypothesis? Did the "Bxxxxxx" serial
numbers on the 453 apply only to a major redesign?

If so, then there should be some manuals for "453, serial numbers
above B??????" From my first observations, some of the boards in
these interspecies scopes are the same as the older scopes, and some
are newer copyrights, maybe the same boards used in the 453A's.

I'll probably spend a few hours of research with my manuals and my
inventory to see if I can sort out how much of these interspecies
scopes are older 453, and how much 453A's. And, more important to
me, do my 453 and 453A manuals, combined, cover most of this
interspecies scope. If there is interest in the group, I'll report
my findings. But, a few words from an expert would be more valuable
than my semi-scientific probings. :)

-TNX, Howard


453 Subtypes.

Howard Matthews
 

Expert info solicited:

My collection of 453's continues to expand faster than I can fix
them. But, I just realized with a recent acquisition that one of my
theories (and previous posts) is totally wrong.

I know 453's underwent major redesign with serial number 20,000.
But outwardly they look the same from the front - the power cord
became permanently attached at the back.

More curiously, there are some 453's that have the front panel and
larger CRT face of the 453A's. Besides the larger CRT, the another
obvious feature is the use of color on the faceplate to define the
functional areas of the controls. And, some controls had to move
around to make room for the larger CRT.

These interspecies 453's look much more like 453A's than their
cospecifics. Larger CRT, colored faceplate fuctional areas. But
they use knobs of the older order - black and red - rather then the
453A's more handsome grey and red knobs.

The first interspecies 453 I obtained was slugged a mod703K - so I
assumed that was the the defining difference. Then I got a mod703H
with those interspecies characteristics (i.e. larger CRT, colored
areas on the face plate to delineate functional areas, etc.)

So, now, I'm like curious and checked my other 453's. "Low and
behold" as they used to say, I have an older style 453 (small CRT,
no colored areas) with a mod703H slug.

Conclusion - mod703H or K was NOT the defining difference! My
theory, and previous post, was WRONG.

AGHGHGH!

Now I have a new hypothesis. My two examples of interspecies 453
all have serial numbers Bxxxxxx. All my old style 453's, pre and
post 20K, have serial numbers without the "B" Beaverton appellation.

Can anyone verify or refute my hypothesis? Did the "Bxxxxxx" serial
numbers on the 453 apply only to a major redesign?

If so, then there should be some manuals for "453, serial numbers
above B??????" From my first observations, some of the boards in
these interspecies scopes are the same as the older scopes, and some
are newer copyrights, maybe the same boards used in the 453A's.

I'll probably spend a few hours of research with my manuals and my
inventory to see if I can sort out how much of these interspecies
scopes are older 453, and how much 453A's. And, more important to
me, do my 453 and 453A manuals, combined, cover most of this
interspecies scope. If there is interest in the group, I'll report
my findings. But, a few words from an expert would be more valuable
than my semi-scientific probings. :)

-TNX, Howard

BTW, I see Unisys is surplusing 453's on eBay with a *Dutch
Auction*. They have other Dutch Auctions too. That could be fun.
Right now - four guaranteed working scopes are going for $1.00 each,
with super-reasonable S&H. Lot of time to go, though. Exciting.


Re: Rhode & Schwarz/Tektronix

Denis Cobley <denis.cobley@...>
 

Tek has several "real time" specan's currently and I think they want to
build more RF products - this would not work if they were still tied to the
R&S distribution agreement.
The new generation of specan's will be all real time (grab chunks of the
spectrum and analyse it in fine detail).
These are often used by government departments for decoding various
transmissions and now of course the new spread spectrum signals.
The old sweeping specan will not be part of the Tek portfolio I suspect as
the new types use high speed digital methods like scopes doing FFT.
Regards
Denis Cobley

----- Original Message -----
From: "John Miles" <jmiles@pop.net>
To: "fjh001" <javier2945@hotmail.com>; <TekScopes@yahoogroups.com>
Sent: Monday, August 02, 2004 7:16 AM
Subject: RE: [TekScopes] Re: Rhode & Schwarz/Tektronix



I wonder if R&S makes their current line-up of spectrum analyzers,
and if
so, what they'll do now that their distribution agreement is no
longer in
effect?
Who? Tek or R&S?
Tek. As far as I'm aware, the last spectrum analyzer they designed and
built in-house was the 2784. Without Rohde & Schwarz's help, they have a
steep hill to climb if they want to maintain their position in that
business.

-- jm






Yahoo! Groups Links






Dismantled for parts - one 7104, three 7834, two 7844, one R564B

grn_onions
 

Hello all,
What a pile of parts I have laying around in the
"Garage Mahal". I have boards, knobs, P/S parts,
hybrids, individual components, assemblies etc. for
7104, 7834,7844, & R564B. Have one each CRT for 7844
& R564B. Also have a 2B67 time base.
If you need parts, please email me off group at:
ml_potter@yahoo.com

Thanks,
Matt Potter



__________________________________
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Yahoo! Mail - 50x more storage than other providers!
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Re: Rhode & Schwarz/Tektronix

John Miles <jmiles@...>
 

I wonder if R&S makes their current line-up of spectrum analyzers,
and if
so, what they'll do now that their distribution agreement is no
longer in
effect?
Who? Tek or R&S?
Tek. As far as I'm aware, the last spectrum analyzer they designed and
built in-house was the 2784. Without Rohde & Schwarz's help, they have a
steep hill to climb if they want to maintain their position in that
business.

-- jm


Re: Rhode & Schwarz/Tektronix

Craig Sawyers <c.sawyers@...>
 

As David said, R&S intruments are among the best ever
made, with a quality that has nothing to envy to Tek instruments.
I have an old R/S SWOB POLYSKOP II sweeper that is an excellent example of
this. This old beast goes from 500kHz to 1.2GHz, and has a stupendous and
very hefty construction. In one section it even uses ceramic notched strips
just like Tek of the same generation. Levelled to better than 0.3dB up to
800MHz, and 1dB above this, with a sweep width down to a couple of hundred
kHz all the way to 1.2GHz.

The only problem was several paper decoupling caps had gone leaky, throwing
the bias levels of the tubes all over the place. Replaced with polyesters
the unit was completely sorted. All tubes measured right on the button.

The only downside is the linearity of the sweep is not quite up to modern
standards - it uses 50/60Hz mains power as the sweep source, and progressive
saturation of the rf tuning inductors to generate the frequency sweep. Not
suprisingly, any linearisation scheme is going to have its shortcoming
within the technology available (it states that the sweep is "almost
linear"!) - but the comb markers are just fine for giving an absolute
standard.

BIG screen - an old B/W 17" television tube.

I've even managed to collect a pair of the correct probes, and the obscure
Dezifix B terminated cables.

Craig


Re: Rhode & Schwarz/Tektronix

fjh001 <javier2945@...>
 

Hello,

Tek has distributed R&S equipment in the USA for about ten years,
actually.
Apparently that agreement has now ended, going by the article just
posted by
Fred de Vries.
This is true, and R&S distributed Tek in Germany form the 50s to about
1980, when Tek decided to open local offices along all the world
instead to sell through distributors.

I wonder if R&S makes their current line-up of spectrum analyzers,
and if
so, what they'll do now that their distribution agreement is no
longer in
effect?
Who? Tek or R&S? I suppose that R&S will not have any problem to
continue selling its superb range of spectrum analyzers and other
instruments. As David said, R&S intruments are among the best ever
made, with a quality that has nothing to envy to Tek instruments. In
fact, the first spectrum analyzer from R&S, the FSA model if I'm
right, was far away in performance compared with any other analyzer at
that moment, and I suspect that Tek preferred to distribute R&S
analyzers instead of building its own.

I suppose that the seller of the URV-5 is not well informed, or has
put the word 'Tektronix' only to catch buyers attention.

Regards,

Javier, EA1CRB


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Listowner, TekScopes


Re: R&S/Tek subject

david@...
 

That clarified two things:

1. R & S did make DMMs for Tek.
Whoa, R&S never made DMMs for Tek! Tek DMMs were made in Taiwan or China,
except maybe the TX series.

The URV5 that is listed on eBay is an RF millivoltmeter, like a very high
end version of the Boonton 92 series.

Also, the name of the company we are talking about is Rohde & Schwarz.

See:

http://www.rohde-schwarz.com/

In my opinion, their test equipment is some of the best ever made.

David DiGiacomo


Good geiger counter (and other equipment) source

Thomas P. Gootee
 

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

This auction site might be of interest to many of you (and not only for geiger counters):

There used to "periodically"/often be, and may still often be, lots of surplus geiger-counter units, many of them NOS, sold at auction at:

http://www.labx.com

They usually went for less than $20 each, IIRC.

(I realize that the 519 scopes that still exist (i.e. not "re-united with the cosmos" during nuclear testing) should not pose ANY radiation hazard. But some people still seemed interested in radiation detection, anyway.)

That site usually has LOTS of OTHER interesting lab-type stuff, some of which goes for very low bids. Much of it is for bio/chem labs (but might still be of interest). But there's usually also a lot of interesting electronic stuff (some of which I have never seen anywhere else), and power supplies, etc, and, occasionally, Tek and HP (and other) test equipment pieces. I bought my first 465 (working and complete), from there, for $104. I also got a 7L5 there, once, complete and working perfectly, for just a little over $200. Occasionally there are also service manuals up for auction, there.

Of course, if you need chem/bio-lab-type glassware and equipment, etc etc etc, then LABX.COM is the site for you!

Cheers!

Tom Gootee

http://www.fullnet.com/u/tomg

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


looking for Tek 2465 pots!!!

Sotiris
 

Hi to all
I'm looking to buy 3 pots for the 2465 scope. part number on Tek
manual is 311-2174-00, 5kohm. Thats Clarostat Inc (Honeywell know)
RV6 look type with mfr part number CM43515 (looks like the new ones
RV6NAYSD502A at Clarostat site).
Anyone has some to sell at me???
Regards
Sotiris Papadimitriou
Athens 11527
GREECE


BNC

 

Hi,
I'm looking for the BNC connector used on the frontpanel of 1502 TDR.
It's a special connector with a small switch inside that shorts the
center pin to ground when nothing is connected. Tek P/N is 131-2010-
00. Anyone have one for sale or trade ?
/Zenith


Re: Contaminated equipment - source for = ion chamber

Ashton Brown <ashton@...>
 

These are Civil Defense [Hah!! - think Goebbelsian propaganda] ion-chambers with minimal 'electronics' as we think of that, and the first major div = I R/hr. At various times over the years, new ones have sold for $3-30 depending on the magazine's readership (often not technical). It's useless except just after the suicidal species has begun its terminal incineration throes, (maybe aided by the shiny "acceptable nice-colored nukes" recently ordered by "US" - but few noticed or cared).

If you ever 'need' one of these - we've blown it, but you'll be able to guesstimate your lifespan in hours. That should be comforting.

For detecting anything just over background, you'd like a most-sensitive range of ~0-20 milli-R/hr. A Geiger (-Mueller) counter is appropriate for the standard-3 wavicles, leaving neutrons out. And you don't need a photomultiplier for any rational sort of "dosage" measurement.

If anyone's interested (and if Med-Ion is still making their excellent kits -?- about 30 miles from me) - can supply info about a small, versatile well-designed unit - but expect price is in the $125 range for kit; more for assembled. Or for analog display unit, look for a used 'Monitor 4' - a bit larger than above == exact same tiny end-window G-M tube. These were also sold in kit form by Heath, for a time.


Ashton

Gary Allsebrook wrote:

You can get a brand new one from Cheaper Than Dirt for 69 bucks. I bought
one last year from some guy on the internet that had a pallet full for 25
bucks came in the original still sealed box, manual strap and long rotted
out D cell.

http://www.cheaperthandirt.com/ctd/product.asp?dept%5Fid=1607&sku=TRW%2D168&
imgid=&mscssid=AE28UETBU9C78NEFMCD3AAG4S5XP986B
-----Original Message-----
From: vintageaudio2004 [mailto:yahoo@lavo.com]
Sent: Saturday, July 31, 2004 5:03 PM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Re: Contaminated equipment - source for geiger
counter


Just by chance today I came across this post from the Temple-Heathkit
mailing list. A guy if offering something that looks like a Cold War
era geiger counter in mint condition, still in the original box,
with "20-cent" battery included.

Alex

==========================
Date: Sat, 31 Jul 2004 13:40:20 -0700
Reply-To: n7rk@cox.net
From: Dave Hollander <n7rk@COX.NET>

Cold War Relic - Civil Defense - Radiological Survey Meter......$85
plusshipping. These are NOS meters painted in Cvil Defense yellow
with a neat Civil Defense logo left over from the cold war. These
were to be used for checking for radiation after a nuclear attack.
Includes manual, an original but now dead vintage battery (note the
20 cent price), remote cable (not shown but stored in the unit), and
carrying case. A neat collectible for your 1950's or 1960's
station
to set by your CONELRAD alarm.
http://members.cox.net/radiostuff9/cd_meter.jpg
http://members.cox.net/radiostuff9/cd_meter2.jpg
http://members.cox.net/radiostuff9/cd_meter3.jpg
http://members.cox.net/radiostuff9/cd_meter4.jpg
http://members.cox.net/radiostuff9/cd_meter5.jpg
http://members.cox.net/radiostuff9/cd_meter6.jpg
http://members.cox.net/radiostuff9/cd_meter7.jpg

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


Contaminated equipment

Elbicon mfg co <elbicon@...>
 

Hello group ,

Just an information for those who are looking for a Geiger Counter in surplus market ,

Most of the counters offered are so insensitive that if you ever get a reading out of them you
probably would not have needed the counter anyhow , and will not have much time left to tell the good news to your friends.

So , for the experiments discussed here you will need a sensitive counter that indeed should give an indication
from the fluo dots on your watch .

Hoping the USA government comes to reason in short time or we probably will need a Geiger counter in the future ,
history repeats and countries who feel themselves having to make rules for the whole globe never brought good things !

Regards
Erik


R&S/Tek subject

Darrin Conniff <djconniff@...>
 

Hello all,

Thanks to Rolynn Prechtl and John Miles for pointing out the article in the
newspaper posted earlier.

That clarified two things:

1. R & S did make DMMs for Tek.

2. Maybe I should read the postings of the day before asking questions.

Thank you,

Darrin


Re: Rhode & Schwarz/Tektronix

John Miles <jmiles@...>
 

Tek has distributed R&S equipment in the USA for about ten years, actually.
Apparently that agreement has now ended, going by the article just posted by
Fred de Vries.

I wonder if R&S makes their current line-up of spectrum analyzers, and if
so, what they'll do now that their distribution agreement is no longer in
effect?

-- john KE5FX

Greetings everyone,

Is this eBay auction incorrect (#3830493102), or did
Rhode/Schwarz have some
type of affiliation with Tektronix, like Telequipment?

If so, pardon my ignorance. ;-) If this is true, I really had no idea!

If anyone can clarify this, I would appreciate it.

Thanks,

Darrin


Rhode & Schwarz/Tektronix

Darrin Conniff <djconniff@...>
 

Greetings everyone,

Is this eBay auction incorrect (#3830493102), or did Rhode/Schwarz have some
type of affiliation with Tektronix, like Telequipment?

If so, pardon my ignorance. ;-) If this is true, I really had no idea!

If anyone can clarify this, I would appreciate it.

Thanks,

Darrin


Re: Contaminated equipment - source for geiger counter

regman10
 

You can get a brand new one from Cheaper Than Dirt for 69 bucks. I bought
one last year from some guy on the internet that had a pallet full for 25
bucks came in the original still sealed box, manual strap and long rotted
out D cell.

http://www.cheaperthandirt.com/ctd/product.asp?dept%5Fid=1607&sku=TRW%2D168&
imgid=&mscssid=AE28UETBU9C78NEFMCD3AAG4S5XP986B

-----Original Message-----
From: vintageaudio2004 [mailto:yahoo@lavo.com]
Sent: Saturday, July 31, 2004 5:03 PM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Re: Contaminated equipment - source for geiger
counter


Just by chance today I came across this post from the Temple-Heathkit
mailing list. A guy if offering something that looks like a Cold War
era geiger counter in mint condition, still in the original box,
with "20-cent" battery included.

Alex

==========================
Date: Sat, 31 Jul 2004 13:40:20 -0700
Reply-To: n7rk@cox.net
From: Dave Hollander <n7rk@COX.NET>

Cold War Relic - Civil Defense - Radiological Survey Meter......$85
plusshipping. These are NOS meters painted in Cvil Defense yellow
with a neat Civil Defense logo left over from the cold war. These
were to be used for checking for radiation after a nuclear attack.
Includes manual, an original but now dead vintage battery (note the
20 cent price), remote cable (not shown but stored in the unit), and
carrying case. A neat collectible for your 1950's or 1960's
station
to set by your CONELRAD alarm.
http://members.cox.net/radiostuff9/cd_meter.jpg
http://members.cox.net/radiostuff9/cd_meter2.jpg
http://members.cox.net/radiostuff9/cd_meter3.jpg
http://members.cox.net/radiostuff9/cd_meter4.jpg
http://members.cox.net/radiostuff9/cd_meter5.jpg
http://members.cox.net/radiostuff9/cd_meter6.jpg
http://members.cox.net/radiostuff9/cd_meter7.jpg

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


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Re: A hot Saturday in July

Jim Nunn <jimnunn0000@...>
 

Larry

I made several replacement couplers for my 1A1 I believe these were made out
of nylon and become very brittle with age and had a tendency crumble apart.
Try a good hobby shop that caries plastic styrene shapes and sheet stock.
with a lot of work you can make you own replacements.

A question to the list I can make these replacement couplings if there is a
demand. they are made from several machined styrene parts and glued
together. Of the eight I have made only one has failed and it was just a
mater of gluing it back together. the down side is that it takes me a
couple of hours to make these and I would have to price them to reflect this
labor. If you are intrusted contact me off list at
jimnunn0000@earthlinkDOTnet.

Jim

I am working on a 547, it is a really nice scope and got it cheap on
eBay. It's brother should arrive next week, I got it for parts but I
bet it will be too nice to scrap. It has a 1A1 plug-in, what a sweety
with no drift whatsoever. Unfortunately, all the little plastic
couplers on the variable controls were destroyed somehow, don't know
if I will find replacements or not.


Re: Contaminated equipment - source for geiger counter

vintageaudio2004 <yahoo@...>
 

Just by chance today I came across this post from the Temple-Heathkit
mailing list. A guy if offering something that looks like a Cold War
era geiger counter in mint condition, still in the original box,
with "20-cent" battery included.

Alex

==========================
Date: Sat, 31 Jul 2004 13:40:20 -0700
Reply-To: n7rk@cox.net
From: Dave Hollander <n7rk@COX.NET>

Cold War Relic - Civil Defense - Radiological Survey Meter......$85
plusshipping. These are NOS meters painted in Cvil Defense yellow
with a neat Civil Defense logo left over from the cold war. These
were to be used for checking for radiation after a nuclear attack.
Includes manual, an original but now dead vintage battery (note the
20 cent price), remote cable (not shown but stored in the unit), and
carrying case. A neat collectible for your 1950's or 1960's
station
to set by your CONELRAD alarm.
http://members.cox.net/radiostuff9/cd_meter.jpg
http://members.cox.net/radiostuff9/cd_meter2.jpg
http://members.cox.net/radiostuff9/cd_meter3.jpg
http://members.cox.net/radiostuff9/cd_meter4.jpg
http://members.cox.net/radiostuff9/cd_meter5.jpg
http://members.cox.net/radiostuff9/cd_meter6.jpg
http://members.cox.net/radiostuff9/cd_meter7.jpg

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

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