Date   

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


eBay item

Craig Sawyers <c.sawyers@...>
 

Hi all

For anyone interested in a TD pulser with less than 30ps rise time, one is
for sale on eBay on 2574320490 at $9.99.

I already have one, and it is really good for checking out fast samplers
(which is what I mainly have used mine for). The disadvantage is that the
pre-trigger is only 60ns before the fast pulse, and the 7T11 needs 75ns to
get going. The solution is to splice a little extra cable into the delay
lines - about 9 feet in total. Small diameter (2.8mm) RG174 seems to work
well.

I've no personal interest in the sale, BTW.

Craig


Re: P6046/P6045 probes

Miroslav Pokorni
 

No Tim,
P6045 is a 230 MHz, 10 MOhm single ended FET probe, completely different
beast. When P6046 is broken down to components they bear part numbers of the
style xxx-yyyy-zz.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Tim Phillips" <t.phillips@ucl.ac.uk>
To: <tekscopes@yahoogroups.com>
Sent: Thursday, November 20, 2003 7:05 AM
Subject: [TekScopes] P6046/P6045 probes


Hi, all;
Is the P6045 probe just the P6046 Differential probe
without the pre-amp and transformer?
regards
Tim.


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