Re: What is this soft metal, and is it toxic? OT
Context needed.? ?What is the larger view of the part?? Where did it come from???Any date information, lab stickers, anything that might indicated what its function was?
? Dan
toggle quoted message
Show quoted text
On Sunday, December 2, 2018, 7:26:14 PM EST, John Griessen <john@...> wrote: On 12/2/18 5:20 PM, Chuck Harris wrote: Why do you think it is metal?? Is it shiny in a way
that doesn't show in the pictures? I guess the photos seemed more like reality right after I took them, but now that I review, they do look flat and like epoxy or caulk... I annotated the same photos, which were done in bright sun. -- John
|
Re: Viewing hood part number for 7000 series scopes
Dennis: I am interested in purchasing your viewing hood for 7000 series Tek scopes for $20 plus $15 for shipping. How can I go about doing this? Gary Gary Bosworth 139 E. Shrode Street Monrovia, CA 91016 On Sun, Dec 2, 2018 at 11:54 AM Dennis Tillman W7PF <dennis@...> wrote: Hi Gary,
If you're looking for one of these I have one I don't need.
You can have it for $20 + $15 shipping instead of the $50 + $30 shipping
this one is listed for.
CONTACT ME OFF LIST if you (or anyone else) wants it at dennis at ridesoft
dot com.
Dennis Tillman W7PF
-----Original Message-----
From: Glydeck via Groups.Io
Sent: Saturday, December 01, 2018 11:38 PM
Subject: Re: [TekScopes] Viewing hood part number for 7000 series scopes
There is one on eBay
/332196485087
On Dec 1, 2018, at 8:51 PM, John Griessen <john@...> wrote:
On 12/1/18 10:11 PM, Gary Robert Bosworth wrote:
My manuals do not list a part number for the viewing hood for any of my 7000 series oscilloscopes.
016-0154-00 is the Batman version -- pictures tomorrow...
--
Dennis Tillman W7PF
TekScopes Moderator
-- Gary Robert Bosworth grbosworth@... Tel: 310-317-2247
|
Large lot of Tek equipment for sale
I have no affiliation with the seller, but he has a lot of equipment (Tek) for sale via Craigslist, located about midway between Washington DC and Baltimore MD (USA):
Mike Dinolfo N4MWP
|
Re: What is this soft metal, and is it toxic? OT
On 12/2/18 5:20 PM, Chuck Harris wrote: Why do you think it is metal? Is it shiny in a way
that doesn't show in the pictures? I guess the photos seemed more like reality right after I took them, but now that I review, they do look flat and like epoxy or caulk... I annotated the same photos, which were done in bright sun. -- John
|
Re: Tektronix Blue paint - source in the UK ??
Phone them. Like I said.
toggle quoted message
Show quoted text
I have tried looking on the Paints4U web site and used their search facility looking for Tektronix
with
no success. Do you by chance know what they called the paint that they supplied to you.
Thanks for your patience.
73 George G6HIG
|
Re: Tektronix Blue paint - source in the UK ??
Hi Craig I have tried looking on the Paints4U web site and used their search facility looking for Tektronix with no success. ?Do you by chance know what they called the paint that they supplied to you. Thanks for your patience. 73 George G6HIG ? On Sunday, December 2, 2018 11:47 PM, Craig Sawyers <c.sawyers@...> wrote: >? Sorry, I must have missed that thread.? I'm in Cambridge UK, and might be interested in a can (if there's any left) to fix up my 2245A which is looking a bit sad.? Let's talk by email:
brian.cockburn.1959
at gmail.com
? Thanks, Brian. Sorry Brain - used it all myself in the end. Phone Paints4u - they have the recipe they developed for me. Craig
|
Re: Tektronix Blue paint - source in the UK ??
Sorry, I must have missed that thread. I'm in Cambridge UK, and might be interested in a can (if
there's any left) to fix up my 2245A which is looking a bit sad. Let's talk by email:
brian.cockburn.1959
at gmail.com
Thanks, Brian. Sorry Brain - used it all myself in the end. Phone Paints4u - they have the recipe they developed for me. Craig
|
Re: What is this soft metal, and is it toxic?
Why do you think it is metal? Is it shiny in a way
that doesn't show in the pictures?
If it is the black stuff, looks like epoxy.
If it is the white stuff, looks like silicone heat
sink compound.
-Chuck Harris
John Griessen wrote:
toggle quoted message
Show quoted text
It's parts of a plasma etcher that are in the high vacuum area. The ceramic plate
had wafer lifting pins and was bonded
to a thick aluminum plate with low temp metal brazing.
I can gouge it easily at a temperature of 60 deg F and the tool feels sticky. A push
and twist captures the tool and holds its
cantilevered weight.
Could this be Woods metal? Gallium? Toxic Mercury Cadmium Lead amalgam?
I am thinking it must have been stable in vacuum with some warm temperatures when the
etcher was running...
|
Re: Tektronix Blue paint - source in the UK ??
Hi Craig, I went through precisely this exercise in the UK and sourced
Tek blue paint, with the right degree of mattness, matched
from a colour sample sprayed with paint from Tektronix.
I even bought a load of the stuff in spray cans with the offer to
sell it to guys just like you - and got very little response. Sorry, I must have missed that thread. I'm in Cambridge UK, and might be interested in a can (if there's any left) to fix up my 2245A which is looking a bit sad. Let's talk by email: brian.cockburn.1959 at gmail.com Thanks, Brian.
|
Re: Tektronix Blue paint - source in the UK ??
Thanks for the tips - there is a local "auto paint matching" service that I will try, though if the
minimum
quantity is a gallon it's gonna be donkey's years before I use it all !!
BTW I did search the group.io but was unable to find much re the UK - perhaps it was lost in the
"clutter" ;-)
Dave Paints4u! I'll say it again - Paints4u. Paints4u. They have the formulation, you don't have to buy a gallon. They supply it in spray cans or in a can along with a can of thinner if you want to use a spray gun. Last time I'm going to say that. I'm done on this topic. Craig
|
Re: 7854 readout and stored waveform jitter
I can believe that if the LF13333N is going flakey that the display might jitter some, it's used to switch between sweep and digital signals.
Dave
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of fred@... Sent: 02 December 2018 21:20 To: [email protected]Subject: Re: [TekScopes] 7854 readout and stored waveform jitter Hi Fred, Look up the part numbers for U620 and U1720 in the service manual. Then we can check the Tek Semiconductor Common Parts Catalog and find out what they are. Dennis Tillman W7PF Hi Dennis, I know the part numbers: LF353 and LF13333, I just don't have any of these. -- Best regards, Fred S.
|
Re: 7854 readout and stored waveform jitter
Hi Fred,
Look up the part numbers for U620 and U1720 in the service manual.
Then we can check the Tek Semiconductor Common Parts Catalog and find out what they are.
Dennis Tillman W7PF
Hi Dennis,
I know the part numbers: LF353 and LF13333, I just don't have any of these.
--
Best regards,
Fred S.
|
What is this soft metal, and is it toxic?
It's parts of a plasma etcher that are in the high vacuum area. The ceramic plate had wafer lifting pins and was bonded
to a thick aluminum plate with low temp metal brazing.
I can gouge it easily at a temperature of 60 deg F and the tool feels sticky. A push and twist captures the tool and holds its
cantilevered weight.
Could this be Woods metal? Gallium? Toxic Mercury Cadmium Lead amalgam?
I am thinking it must have been stable in vacuum with some warm temperatures when the etcher was running...
|
Re: 7854 readout and stored waveform jitter
Hi Fred,
Look up the part numbers for U620 and U1720 in the service manual.
Then we can check the Tek Semiconductor Common Parts Catalog and find out what they are.
Dennis Tillman W7PF
toggle quoted message
Show quoted text
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
fred@...
Sent: Sunday, December 02, 2018 9:22 AM
To: [email protected]
Subject: Re: [TekScopes] 7854 readout and stored waveform jitter
Hi Fred,
We share a love of the 7854. I have a few troubleshooting related
questions and suggestions of my own:
It sounds you have isolated the problem to the display board.
As Raymond Domp Frank already suggested, remove and reseat ALL contacts
to break oxides.
Is there any chance this is an intermittent problem?
If this is an intermittent problem is it temperature sensitive - you can
probably test this with a hair dryer and a can of FreezIt.
Is this jitter present the moment the CRT warms up from being powered
off overnight? That would be a clue its temp sensitive.
At this point my favorite tool is a can of FreezIt with a thin tube to
reach into difficult places.
My first test is to use FreezIt to freeze everything on the entire board
hoping that momentarily cures the problem or alters it's behavior in
some way. If that happens I proceed to the next step after the board has
a chance to warm up again.
Now I spray FreezIt locally in different areas to narrow down the
search.
Finally I start freezing individual ICs, semiconductors, and tantalum
caps hoping to get a reaction from one of them.
Dennis Tillman W7PF
I replaced all electrolytics on the display board, checked the
inductors, but no change.
Probed +15V1, -15V1, +15V2 and -15V2, everything is fine. The only
components common to horizontal and vertical outputs are U620 and U1720,
but I don't have replacements at the moment. The problem is not
intermittent, the jitter frequency is a only couple of Hertz. Tried the
freeze spray, no sensitivity. Could it be that the start time of the
readout/stored waveform is jittery? What's the mechanism that starts the
readout?
--
Best regards,
Fred S.
-- Dennis Tillman W7PF TekScopes Moderator
|
Re: Viewing hood part number for 7000 series scopes
Hi Gary,
If you're looking for one of these I have one I don't need.
You can have it for $20 + $15 shipping instead of the $50 + $30 shipping this one is listed for.
CONTACT ME OFF LIST if you (or anyone else) wants it at dennis at ridesoft dot com.
Dennis Tillman W7PF
toggle quoted message
Show quoted text
-----Original Message-----
From: Glydeck via Groups.Io
Sent: Saturday, December 01, 2018 11:38 PM
Subject: Re: [TekScopes] Viewing hood part number for 7000 series scopes
There is one on eBay
/332196485087
On Dec 1, 2018, at 8:51 PM, John Griessen <john@...> wrote:
On 12/1/18 10:11 PM, Gary Robert Bosworth wrote:
My manuals do not list a part number for the viewing hood for any of my 7000 series oscilloscopes.
016-0154-00 is the Batman version -- pictures tomorrow...
-- Dennis Tillman W7PF TekScopes Moderator
|
Re: Tektronix Blue paint - source in the UK ??
Thanks for the tips - there is a local "auto paint matching" service
that I will try, though if the minimum quantity is a gallon it's gonna
be donkey's years before I use it all !!
BTW I did search the group.io but was unable to find much re the UK -
perhaps it was lost in the "clutter" ;-)
Dave
toggle quoted message
Show quoted text
On 02/12/2018 01:06, Jack wrote: In that case Dave, what about sourcing the pigment in liquid (tube) or powder form...? That may be the shot.
Jack
.
|
Re: Tek stuff for sale in Maryland (USA) on Craigs Listi
The line wrap got ya. That l on the next line is part of the url. Here it is again:
Vince.
toggle quoted message
Show quoted text
On 12/02/2018 02:23 PM, Dennis Tillman W7PF wrote: There is a large collection of Tektronix equipment for sale in Craig's List
in the Maryland area.
It includes mainframes, plug-ins, parts, probes, attenuators, carts,
original manuals, etc. There is a picture.
The link is
l
I have no connection to the seller.
Dennis Tillman W7PF
--
K8ZW
|
Tek stuff for sale in Maryland (USA) on Craigs Listi
There is a large collection of Tektronix equipment for sale in Craig's List
in the Maryland area.
It includes mainframes, plug-ins, parts, probes, attenuators, carts,
original manuals, etc. There is a picture.
The link is
l
I have no connection to the seller.
Dennis Tillman W7PF
|
Re: 7854 readout and stored waveform jitter
Hi Fred,
We share a love of the 7854. I have a few troubleshooting related questions and suggestions of my own:
It sounds you have isolated the problem to the display board.
As Raymond Domp Frank already suggested, remove and reseat ALL contacts to break oxides.
Is there any chance this is an intermittent problem?
If this is an intermittent problem is it temperature sensitive - you can probably test this with a hair dryer and a can of FreezIt.
Is this jitter present the moment the CRT warms up from being powered off overnight? That would be a clue its temp sensitive.
At this point my favorite tool is a can of FreezIt with a thin tube to reach into difficult places.
My first test is to use FreezIt to freeze everything on the entire board hoping that momentarily cures the problem or alters it's behavior in some way. If that happens I proceed to the next step after the board has a chance to warm up again.
Now I spray FreezIt locally in different areas to narrow down the search.
Finally I start freezing individual ICs, semiconductors, and tantalum caps hoping to get a reaction from one of them.
Dennis Tillman W7PF
I replaced all electrolytics on the display board, checked the inductors, but no change.
Probed +15V1, -15V1, +15V2 and -15V2, everything is fine. The only components common to horizontal and vertical outputs are U620 and U1720, but I don't have replacements at the moment. The problem is not intermittent, the jitter frequency is a only couple of Hertz. Tried the freeze spray, no sensitivity. Could it be that the start time of the readout/stored waveform is jittery? What's the mechanism that starts the readout?
--
Best regards,
Fred S.
|
Re: Viewing hood part number for 7000 series scopes
On 12/2/18 1:38 AM, Glydeck via Groups.Io wrote: There is one on eBay
Great photos of it! I will skip posting mine now... Mine's for sale for a more reasonable price of $15 + ship if wanting one....
|
Gary Robert Bosworth
Mike Dinolfo
Brian Cockburn
David C. Partridge
Fred S.