Date   

Re: Black Beauty Caps

Stan & Patricia Griffiths <w7ni@...>
 

Hi George,

The first time I was exposed to the "Black Beauty" was when they were
discussed by the more experienced technicians in the Tektronix Factory
Service area that I worked in in 1961. At that time, I thought it was just
a slang term for a certain type of leaky capacitor that was oil filled and
leaked . . . both oil and electrically. I later found out that "Black
Beauty" is actually a term used by Sprague for a line of capacitors they
made during the decade of the 50's and Tek used a lot of them. Most of the
common values from about 0.1 uf to 0.005 uf in voltages of 200-600 volts had
black bodies and painted stripes (like a resistor) for color coding the
value and voltage rating. The higher voltage rated ones, like 3kv to 10 kv
also had black bodies but the values and voltage ratings were printed on
them. I have seen the high voltage ones printed in both yellow and red and
I am not certain that both of these are really "Black Beauties", but they
both tend to leak.

I noticed a note here on TekScopes recently (from Stan McIntosh) where he
indicated they also came in burgundy. Tek did use some burgundy caps in
some power supplies but I think they were made by Good-All. I have not
known the Good-All caps to leak (with one or two exceptions) in my 40 years
of experience with them. I thnk the "Black Beauty" name is a Sprague
tradename and would not be used by any other company.

By the way, many audiophiles just LOVE "Black Beauty" caps because they
think that is how they will get the "old sound" from their tube-type hifi
amps. They especially love the 0.015uf at 400 volt size. I have sold some
of those salvaged out of Tek scopes for as much as $15 for a pair,
describing them as accurately as I could without calling them outright
"garbage" . . . although that is what they are to me . . . No audiophile
has ever complained to me that he is not satisfied with the "Black Beauties"
he has gotten from me. I am certainly happier with the money . . .

Stan
w7ni@easystreet.com

----- Original Message -----
From: "George Headley" <georgeheadley@mybluelight.com>
To: <TekScopes@yahoogroups.com>
Sent: Saturday, November 22, 2003 1:59 PM
Subject: [TekScopes] Black Beauty Caps


Hello group: I have seen repeated references to the "Black Beauty" caps. I
have tried to figure out the way to recognize these things from the
different messages but still don't have a clue. I enjoy working on the 400
series of Tektronix because I spent a great deal of my youth hunkered down
in very cold computer rooms staring at these scopes and designing traps to
catch that one glitch that proved or dis proved a theory.
Did they use these particular caps in the 465 series or were they just a
problem in the tube types with the higher voltages.
I really appreciate you allowing me to sit on the side lines and listen to
the tales. Every time I see the sticker at the front/top of a Tek scope I
wonder if that guy is one of you.
If you can educate me on the black beauty I will sleep like a baby
tonight.
George Headley

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Re: TeK 453 Scope Questions Please Help?

Stan & Patricia Griffiths <w7ni@...>
 

One thing you can check, Jon, is that the pin connections to the CRT neck
are secure. I have seen these come off in transit. I also have to
emphasize that 90% of ALL scope prblems are in the power supplies. You will
need a manual if you don't have one. The first thing to do is check to make
sure the power supplies are working correctly. All bets are off unless the
power supplies are working correctly. The correct operation of the power
supplies is critical to every other circuit in the scope so you must start
there.

Ask again, when you have a manual and have confirmed correct power supply
operation.

Stan
w7ni@easystreet.com

----- Original Message -----
From: "jonkzak" <jonkzak@yahoo.com>
To: <TekScopes@yahoogroups.com>
Sent: Monday, November 17, 2003 9:33 AM
Subject: [TekScopes] TeK 453 Scope Questions Please Help?


All,

I've just received my used 453 and when I turned it on The only way
to get a trace is to hold the trace find button down and then the
trace is very small located on the right side of the screen. I did
open the covers and just looked around to see if anything looked
burned etc. I did notice this effect. When I toggle the on/off
switch to 'on' there is a lamp located on the bottom pc board that
will flash on then off and stays off. Turning the on/off switch
to 'off' will also flash this lamp. I don't know if this is normal
or not. Also all other pilots on the front of the scope function as
normal. The small trace does seem to look correct using the
calibrate signal as input. Any help would be greatly appreciated.
I'm sure that this has been covered but my search has not resulted in
any hits.

Best Regards,

Jon





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Black Beauty Caps

George Headley
 

Hello group: I have seen repeated references to the "Black Beauty" caps. I have tried to figure out the way to recognize these things from the different messages but still don't have a clue. I enjoy working on the 400 series of Tektronix because I spent a great deal of my youth hunkered down in very cold computer rooms staring at these scopes and designing traps to catch that one glitch that proved or dis proved a theory.
Did they use these particular caps in the 465 series or were they just a problem in the tube types with the higher voltages.
I really appreciate you allowing me to sit on the side lines and listen to the tales. Every time I see the sticker at the front/top of a Tek scope I wonder if that guy is one of you.
If you can educate me on the black beauty I will sleep like a baby tonight.
George Headley

Sign up for Internet Service under $10 dollars a month, at http://isp.BlueLight.com


Re: Tek 310 Power Supply

Ashton Brown <ashton@...>
 

** Yeay !!! **

This-all reminds me of (a friend) doing the cam followers for a Bugatti engine.
Sig. Ettore correctly reasoned that, the entire force on the effectively 2-D cam lobe - should be in shear. Not just "the integral of the circular cross-section" as behaves that way:
ALL. In 'shear'.

Correspondingly, He {caps advised} decreed that The Followers Shalt Be Square in their cross-section.
And They Were.

(thus, any future wear or other problem, necessitated the ritual known as "the Pouring of the Babbit" (No not That! S. Lewis 'Babbitt' guy))
Then: the meticulous hand scraping of that square-bore until it Was Square - and also Not Loose. Or pour it again.

{sigh}

Yep, reminds me of trying to resuscitate a Victoreen Area Monitor (radiation) and deconstructing 'til the only possible reason for That short was - a turn-to-turn short of That interstage transformer to a (2N404?) Unwind, measure length, mic gauge.. yada yada et Voila -- a ~$3200 (labour) working relic of the Pantex / Silkwood atom era. Ready for any next atom era.


Kudos,

Ashton


stan mcintosh wrote:

Maybe, I finally have it right. My voltages are:
nominal actual
-150 -150.3
+100 +99.3
+300 +301.5

Close enough, right?

I'm really embarrassed about the cause. I forgot that not all caps of the Black Beauty construction are marked clearly as such. Some are marked like resistors, and some come in burgundy. I should have realized the color variation, sooner. I have a few NOS sinus-infection green caps. Two were leaky.

Thanks.

stan


Tek 310 Power Supply

stan mcintosh <mcintosh@...>
 

Maybe, I finally have it right. My voltages are:

nominal actual
-150 -150.3
+100 +99.3
+300 +301.5

Close enough, right?

I'm really embarrassed about the cause. I forgot that not all caps of the Black Beauty construction are marked clearly as such. Some are marked like resistors, and some come in burgundy. I should have realized the color variation, sooner. I have a few NOS sinus-infection green caps. Two were leaky.

Thanks.

stan


Tektronix 547 good working order for sale

ihatethiscrap77
 

I have a Tektronix 547, it is in good working order and available for
sale. I am located in Centerville, UT. Sorry about the id name,
didn't know it would show and I get tired of having to register just
to use a site! Monica


455 manual

Neal
 

I am looking for a service manual for a Tektronix 455 analog scope.
Hope someone can help me.


576 Curve Tracer Test Fixtures

w1ksz <w1ksz@...>
 

I just picked up one of these. Anyone got any Test Fixtures they
want to part with ?

Thanks, Dick, w1KSZ


Re: Would the Tekscopes list manager.....

John Miles <jmiles@...>
 

Honestly, I'd have to say that 5-6 spam messages a year doesn't warrant
uprooting the list. Yahoo sucks, all right, but it does have a reasonable
archive mechanism and it's not going to go away anytime soon.

In a low-volume list like this one, it might make sense for Michael to use
the "Approve all signups" box on the list configuration manager (or whatever
it's called these days). That will keep the limited # of spambots out.

-- john KE5FX

-----Original Message-----
From: Bruce Lane [mailto:kyrrin@bluefeathertech.com]
Sent: Friday, November 21, 2003 5:36 AM
To: tekscopes@yahoogroups.com
Subject: [TekScopes] Would the Tekscopes list manager.....


...please contact me via E-mail. I'd like to discuss the
possibility of hosting the list on my domain to get away from all
the drenn associated with YahooGroups, and to be able to more
easily give spammers the boot.

FWIW: I'm currenly looking at installing Majordomo list
management software. The current list manager would, of course,
have admin rights for the list itself.

Thanks much.

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
ARS KC7GR (Formerly WD6EOS) since 12-77 -- kyrrin@bluefeathertech.com
"Quando Omni Flunkus Moritati" (Red Green, aka Steve Smith)



Re: Spectrum Analyzer Card Extenders??

John Miles <jmiles@...>
 

Couple of crude photos I just took:

http://www.speakeasy.net/~jmiles1/ext1.jpg
http://www.speakeasy.net/~jmiles1/ext2.jpg (out of focus but you can see the
two rows of pins...)

-- john KE5FX

-----Original Message-----
From: Miroslav Pokorni [mailto:mpokorni2000@yahoo.com]
Sent: Friday, November 21, 2003 1:53 PM
To: manorth; TekScopes@yahoogroups.com; John Miles
Subject: Re: [TekScopes] Spectrum Analyzer Card Extenders??


Would someone, please, describe those connectors used on 49X. Maybe, there
is a hope of finding some.

Regards

Miroslav Pokorni
----- Original Message -----
From: "John Miles" <jmiles@pop.net>
To: "manorth" <matt.north@verizon.net>; <TekScopes@yahoogroups.com>
Sent: Friday, November 21, 2003 11:19 AM
Subject: RE: [TekScopes] Spectrum Analyzer Card Extenders??



Re: Spectrum Analyzer Card Extenders??

Miroslav Pokorni
 

Would someone, please, describe those connectors used on 49X. Maybe, there
is a hope of finding some.

Regards

Miroslav Pokorni

----- Original Message -----
From: "John Miles" <jmiles@pop.net>
To: "manorth" <matt.north@verizon.net>; <TekScopes@yahoogroups.com>
Sent: Friday, November 21, 2003 11:19 AM
Subject: RE: [TekScopes] Spectrum Analyzer Card Extenders??


As far as I'm aware, no one has been able to put their hands on the
connectors required to mate with the 49x motherboard and cards. They may
no
longer be made.

Historically, the extenders show up on eBay a couple times a year, and
usually sell for at least a couple hundred bucks.

You may want to try emailing Tom Neumann at info@tektrotom.de (see
www.tektrotrom.de, in German). He's a good source of 49x analyzer parts,
and may have a spare set of extenders he can sell you.

It may also be worthwhile to check with Deane Kidd, at (503) 625-7363. He
has been able to supply manuals and parts for these analyzers in the past.

-- john KE5FX

-----Original Message-----
From: manorth [mailto:matt.north@verizon.net]
Sent: Friday, November 21, 2003 11:12 AM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Spectrum Analyzer Card Extenders??


Hi,
Does anyone know where I can buy, borrow, rent cards extenders
that will fit the Tek 490 series of spectrum analyzers.

Failing that, does anyone have a supply of the green connectors,
and pins that are used on the 490's so that I could make my own
extenders?

Thanks, Matt


545B Horiz Amp Resistor Arrays

colingoode2000 <colin.goode@...>
 

I am trying to find the two resistor arrays R364 25K 6K Tap part no
310-506 and R384 30K 6K Tap part no 310-507 in the Horizontal Amp on
my 545B which is undergoing restoration. Any body got any ideas where
I can get some original or if a modern equivelent is available.

..Colin Goode


Re: Spectrum Analyzer Card Extenders??

John Miles <jmiles@...>
 

As far as I'm aware, no one has been able to put their hands on the
connectors required to mate with the 49x motherboard and cards. They may no
longer be made.

Historically, the extenders show up on eBay a couple times a year, and
usually sell for at least a couple hundred bucks.

You may want to try emailing Tom Neumann at info@tektrotom.de (see
www.tektrotrom.de, in German). He's a good source of 49x analyzer parts,
and may have a spare set of extenders he can sell you.

It may also be worthwhile to check with Deane Kidd, at (503) 625-7363. He
has been able to supply manuals and parts for these analyzers in the past.

-- john KE5FX

-----Original Message-----
From: manorth [mailto:matt.north@verizon.net]
Sent: Friday, November 21, 2003 11:12 AM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Spectrum Analyzer Card Extenders??


Hi,
Does anyone know where I can buy, borrow, rent cards extenders
that will fit the Tek 490 series of spectrum analyzers.

Failing that, does anyone have a supply of the green connectors,
and pins that are used on the 490's so that I could make my own
extenders?

Thanks, Matt


Spectrum Analyzer Card Extenders??

manorth <matt.north@...>
 

Hi,
Does anyone know where I can buy, borrow, rent cards extenders
that will fit the Tek 490 series of spectrum analyzers.

Failing that, does anyone have a supply of the green connectors,
and pins that are used on the 490's so that I could make my own
extenders?

Thanks, Matt


Re: Fluke group

Don Black <jeans@...>
 

Hi Jim, what type of Fluke are you working on?
Don Black.

nats6035 wrote:

Hi ,
Looking for a discussion group on older Fluke instruments.
Something similar to this "TekScopes" group, which has been very
usefull getting my 465M working again.
Thanks,
Jim




Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Would the Tekscopes list manager.....

Bruce Lane
 

...please contact me via E-mail. I'd like to discuss the possibility of hosting the list on my domain to get away from all the drenn associated with YahooGroups, and to be able to more easily give spammers the boot.

FWIW: I'm currenly looking at installing Majordomo list management software. The current list manager would, of course, have admin rights for the list itself.

Thanks much.

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
ARS KC7GR (Formerly WD6EOS) since 12-77 -- kyrrin@bluefeathertech.com
"Quando Omni Flunkus Moritati" (Red Green, aka Steve Smith)


Fluke group

nats6035
 

Hi ,
Looking for a discussion group on older Fluke instruments.
Something similar to this "TekScopes" group, which has been very
usefull getting my 465M working again.
Thanks,
Jim


Re: Tek 465B with less than good focus

Denis Cobley <denis.cobley@...>
 

Hi George
These are getting old (like all of us).
The CRT's lose sharpness with age - my best suggestion is to get a 2200 CRT
(154-0861-00) from any 2213A, 2215A, 2220, 2221/A 2230, 2232, 2235/A 2236.
These CRT's were much sharper new and will always give better results.
You can buy a dead / damaged unit on ebay very cheap.
Pull the CRT, remove the trace rotation coil and it's a perfect fit (gains
and timing will be very close).
This CRT can then be you test tube - swap it into each scope - if the trace
is still bad you have a fault - if it comes good then your old CRT is beyond
it's useful life.
Regards
Denis
Regards
Denis Cobley
Newtek Support Pty Ltd
11 Lyon Park Rd
North Ryde 2113
Australia
Ph 61 2 9888 0162
Fax 61 2 9888 0125
www.newteksupport.com

----- Original Message -----
From: "George Headley" <georgeheadley@mybluelight.com>
To: <TekScopes@yahoogroups.com>
Sent: Friday, November 21, 2003 12:46 PM
Subject: [TekScopes] Tek 465B with less than good focus


Hello Group: This is my first post but I feel that I know all of the
regulars. I'm very impressed with your knowledge and have learned a lot from
your experiences. I an an old computer tech , retired but not ready to give
up the challenges relating to Tektronix scopes. I have been buying them
mostly for the challenges found in the repairs but somewhat out of respect
for equipment that is fun to work on because of the quality. I have several
465B that have poor focus. Not really bad but not good enough. There is some
improvement when I limit to 20MHz. I dont have a HV probe but I suspect HV
problems. I know from experience that low HV will cause a blooming of the
trace. I have adjusted the CRT bias as per the manual. Slight improvement,
astig and sweep ckts within spec. If I can trouble you for a minute of your
time do you have any suggestions. one more thing , it may be my imagination
but the rise and fall lines seem to be sharper than the time base lines..
George Headley

Sign up for Internet Service under $10 dollars a month, at
http://isp.BlueLight.com




Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Tek 465B with less than good focus

George Headley
 

Hello Group: This is my first post but I feel that I know all of the regulars. I'm very impressed with your knowledge and have learned a lot from your experiences. I an an old computer tech , retired but not ready to give up the challenges relating to Tektronix scopes. I have been buying them mostly for the challenges found in the repairs but somewhat out of respect for equipment that is fun to work on because of the quality. I have several 465B that have poor focus. Not really bad but not good enough. There is some improvement when I limit to 20MHz. I dont have a HV probe but I suspect HV problems. I know from experience that low HV will cause a blooming of the trace. I have adjusted the CRT bias as per the manual. Slight improvement, astig and sweep ckts within spec. If I can trouble you for a minute of your time do you have any suggestions. one more thing , it may be my imagination but the rise and fall lines seem to be sharper than the time base lines..
George Headley

Sign up for Internet Service under $10 dollars a month, at http://isp.BlueLight.com


L20 and 53x/54x/55x extender for sale

Jim Reese
 

Hello all.

Just picked up the latest pile (532, 533, 3-CA, carts, etc). Have
the following to offer to the first one that wants them (includes
shipping in CONUS):

Pentrix L20 (made by Tek, similar to 1L20): $100
(Complete, very clean front, provides trace, needs usual
overhaul/TLC, and needs plastic shaft adapter repaired/glued on the
Narrow/Wide Dispersion knob/switch)

EP53 Plug-In Extension (Letter and 1 series) plus Gain Adjust
Extension: $25

Regards,

Jim

179121 - 179140 of 184718