Date   

Re: 7633 after recap

Brendan
 

Thank you. I appreciate all the help you and the guys gave me. Sorry I'm so green. But I have a lot of fun. Now I'm on the prowl for another 7633 for donor organs.


Re: Re-introduction to the group

Michael A. Terrell
 

I went to that page and a message flashed up that the security was improperly configured for that site. I didn't look any further.

-----Original Message-----
From: Tom Gardner <tggzzz@...>
Sent: Feb 26, 2018 6:11 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Re-introduction to the group

On 26/02/18 23:08, jafinch78 . wrote:
On Mon, Feb 26, 2018 at 12:25 am, Tom Gardner wrote:

boots a thin Linux operating system from removable media without mounting a
local hard drive.
You can do the same on a USB or other flash card by installing the operating system on the flash drive and setting your computer BIOS to boot from USB. Then configuring the Linux distro; say like Ubuntu or even better Kali or Tails, to not mount the drives. Make sure there is no persistence set when installing.
There are many ways to skin a cat; TENS is one designed specifically to skin
cats, rather than a mere side side-effect.



Michael A. Terrell


Re: 7633 after recap

unclebanjoman
 

Well done!


Re: Re-introduction to the group

Tom Gardner
 

On 26/02/18 23:08, jafinch78 . wrote:
On Mon, Feb 26, 2018 at 12:25 am, Tom Gardner wrote:

boots a thin Linux operating system from removable media without mounting a
local hard drive.
You can do the same on a USB or other flash card by installing the operating system on the flash drive and setting your computer BIOS to boot from USB. Then configuring the Linux distro; say like Ubuntu or even better Kali or Tails, to not mount the drives. Make sure there is no persistence set when installing.
There are many ways to skin a cat; TENS is one designed specifically to skin cats, rather than a mere side side-effect.


Re: Re-introduction to the group

jafinch78 .
 

On Mon, Feb 26, 2018 at 12:25 am, Tom Gardner wrote:


boots a thin Linux operating system from removable media without mounting a
local hard drive.
You can do the same on a USB or other flash card by installing the operating system on the flash drive and setting your computer BIOS to boot from USB. Then configuring the Linux distro; say like Ubuntu or even better Kali or Tails, to not mount the drives. Make sure there is no persistence set when installing.


Hinge Covers for 465, 465B, 475, and 475A Oscilloscopes

Jeff Davis
 

Hi TekScopes,


Just a quick note to let the group know that I've developed a replacement hinge cover for Tektronix 465 (S/N > 250000), 465B, 475, and 475A oscilloscopes. This is the plastic piece that covers the handle hinge mechanism where the handle joins to the cabinet. It replaces Tektronix part number 200-0602-00. Although it's not 100% identical in appearance to the original part (color is black, and some cosmetic differences), it fits perfectly. It is a darn sight better than looking at the innards of the hinge mechanism!

DOES NOT FIT 465 models with serial numbers below 250000. These early versions of the 465 model used a different part number hinge cover (200-0602-01). I've tried and found them not to fit. Models 465B, 475, and 475A are all compatible as their service manuals (for all serial numbers) call out the compatible cover part number.

If you have an early version 465, I have it on my TO DO list to modify the design to create a replacement for them. Please private message me if you're interested and I'll let you know when I think I'll have that available.

These are available both on eBay and on my www.n0dy.com<http://www.n0dy.com> web site. Photos on both sites.

Regards,
Jeff
[https://www.n0dy.com/wp-content/uploads/2017/12/B014518-3985-Edit-1.jpg]<http://www.n0dy.com/>

- N0DY Electronics<http://www.n0dy.com/>
www.n0dy.com
Tektronix oscilloscopes and accessories, home automation devices


FS: printed manuals for Tektronix 515 and 503

Brad Thompson <brad.thompson@...>
 

Hello--

I'm offering FS one each manual for a Tek 515/515A oscilloscope (no serial no.)
and a Tek 503 oscilloscope (no serial no. but update pages mention s/n 10170).

The 515 manual is in VG condition (front cover missing a section near its
model-number window

The 503 manual is in only good condition-- missing most of its plastic comb binder;
includes penciled-in troubleshooting notes on some pages..

I'm asking $10.00 plus USPS media-mail postage.

Questions welcomed, PayPal honored.

Thanks, and 73--

Brad AA1IP


Re: 7633 after recap

Brendan
 

And it's alive!! replaced q560 and q580 with 2n5551 that came today.

https://groups.io/g/TekScopes/photo/28773/3?p=Name,,,20,1,0,0


Re: TekWiki Helper Idea. Brainstorm or Washout?

Brian Bloom
 

What if each person agreeing to help gets assigned one catalog to go through?

Direct access to TekWiki would be ideal for efficiency, but we'll still need to have a basic format for the information being added. Maybe Kurt or one of the main editors of the TekWiki site could put a link in here to one of the pages that are laid out to their satisfaction. That way everyone who is adding info to the wiki will know how it's expected to look, and the need for editing will be less likely.

I already have a login for TekWiki from a couple years back when I added info for the 067-0532-01, if it's still active. I'm sure several others also already have logins as well.


Re: TekWiki Helper Idea. Brainstorm or Washout?

Michael A. Terrell
 

That wasn't my intention. A sub page with a link from the instrument's main page would take you to it, only if you need it.

-----Original Message-----
From: Robert Hay <bobh@...>
Sent: Feb 26, 2018 11:00 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] TekWiki Helper Idea. Brainstorm or Washout?

A TekScopes helper could volunteer for one instrument. They would search
the catalogs on TekWiki for their instrument.  They would save the
option information by year in a file on groups.io files area like
485-options.doc.  Then Kurt's helpers could put it up on the TekWiki site.

It would be lot of downloads and bandwidth used from TekWiki just to get
to the information for one instrument.

Bob.

On 2/26/2018 7:54 AM, Vince Vielhaber wrote:
It would be a lot quicker if the folks in the community were to
contribute to a list kept in a central location, then Kurt's current
helpers (of which I'm one) can take from that list and add to the site.

Vince.


On 02/25/2018 10:26 PM, Dennis Tillman W7PF wrote:
Michael Terrell had an interesting idea that might save us time but
as near as I can tell it would only make a lot more work for Kurt at
TekWiki.
Michael's idea was to list the options for each model on TekWiki.

The more general question is what would it take to list every option
for every instrument on Kurt's web site. I know Kurt doesn't have the
time. He has a full time job already. I doubt anyone on this forum
has that much time to spare. I don't.

That started me thinking what it would take to do this. There are 40+
years of catalogs from 1965 to 2005 that Kurt roughly covers the
products from right now. Each catalog has anywhere from 100 (the
1960's) to <1000 instruments (the 2000's). Each description has a
section at the end with the options and their descriptions. The
option number and description would have to be logged, then
incorporated into each of Kurt's web pages. My best guess is it would
take 1 man-year of work on the part of a college student majoring in
electronics.

So here is my question: How much could we as an organization raise to
give Kurt a helper to really speed him up? Is this even a possibility?

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Michael A. Terrell
Sent: Sunday, February 25, 2018 3:50 PM

It would be nice to list the known options for each model on Tekwiki,
to save people time in the future.

-----Original Message-----
From: Kevin Oconnor <@KO3Y>

In my recollection Tek had obscure option numbers for custom
phosphors on some scopes. I wonder if this is the case.
What is your phosphor color/persistence? My std 485 is blueish and fast.

Michael A. Terrell






Michael A. Terrell


Visit by Kurt Rosenfeld, Honored VintageTEK Museum Member

 

Kurt Rosenfeld will be at VintageTEK this Saturday, March 3 starting about
10AM.

Kurt founded and runs the extensive TekWiki site at w140.com.



The purpose of Kurt's TekWiki is to help people learn more about classic
Tektronix equipment.

It is clearly a labor of love by a professional web developer. There is
nothing else like TekWiki anywhere else.



If you want to add to Tekwiki or improve existing Tekwiki pages, please
email the administrator for an account.



For faster browsing of Tekwiki, use the proxy:
http://proxy.w140.com/tekwiki/wiki



Many TekScopes members do not live close enough to visit the VintageTEK
Museum. For those that are not fortunate enough to visit the museum there is
a Donor Plaque near the entrance, Kurt is a $5,000 contributor to
vintageTEK, and an enthusiastic supporter of Tektronix, so he is certainly a
very honored guest.



He has generously offered to pay for digitizing our microfiche collection,
something that is currently on the board meeting agenda.



Come in this Saturday to welcome him.



Dennis Tillman W7PF

VintageTEK Museum member since its inception


Re: TekWiki Helper Idea. Brainstorm or Washout?

Dave Voorhis
 

The usual benefit of a Wiki is that anyone — or at least anyone explicitly given edit access — can edit it. We sometimes use internal-only Wikis at work to facilitate collaboration on shared documents.

So, if the content is intended to eventually wind up on TekWiki, wouldn’t it make sense for the owner (Kurt?) to allow folks to sign up for accounts, grant them edit access to the relevant page(s), and let them edit freely?

Another option is Google Docs or Google Sheets, which allows similar free mass-editability, in a slightly more structured fashion than a Wiki page (and perhaps a little easier to use than Wiki markup.)

On 26 Feb 2018, at 17:08, Vince Vielhaber <vev@...> wrote:

Spreadsheet might be too much work for some or some may just not like them. I fall into the second category. A simple text file would suffice.

Vince.



On 02/26/2018 11:18 AM, Dave Daniel wrote:
Hello,

I am also one of the TekWiki "helpers".

I see a couple of different relatively easy methods that could be used
to gather the information (I'm sure that there are lots of other ways of
which I have not thought). Some of these have been mentioned by others
on the list.

First, create an "options" spreadsheet and keep it on the groups.io
website. The spreadsheet would be organized by model, then option and
years that the option was available. If the objection that "many"
possible contributors do not have access to Excel, then I would create a
text file, as most who don't have access to Excel or OpenOffice (or
whatever it's called these days) probably won't have access to Word
either. A spreadsheet seems to me to be the most logical document type.

Gathering the information for the spreadsheet:

1. Members could add the information that they already have handy to the
spreadsheet. For instance, I have spreadsheets for most of my test
equipment that have model, s/n, options, price paid, original catalog
price, etc., information. I could extract the model/option information
(excepting the year data) pretty easily and add it to the options
spreadsheet.

2. As Robert Hay suggests, we could have each member interested in
contributing take one model and dig out the information from the
catalogs. and add the information to the options spreadsheet.

3. We could ask that members just start gathering the information as
they have time and update the spreadsheet. Of course, this would end up
creating a lot of duplicated effort.

DaveD

On 2/25/2018 8:26 PM, Dennis Tillman W7PF wrote:
Michael Terrell had an interesting idea that might save us time but as
near as I can tell it would only make a lot more work for Kurt at
TekWiki.
Michael's idea was to list the options for each model on TekWiki.

The more general question is what would it take to list every option
for every instrument on Kurt's web site. I know Kurt doesn't have the
time. He has a full time job already. I doubt anyone on this forum has
that much time to spare. I don't.

That started me thinking what it would take to do this. There are 40+
years of catalogs from 1965 to 2005 that Kurt roughly covers the
products from right now. Each catalog has anywhere from 100 (the
1960's) to <1000 instruments (the 2000's). Each description has a
section at the end with the options and their descriptions. The option
number and description would have to be logged, then incorporated into
each of Kurt's web pages. My best guess is it would take 1 man-year of
work on the part of a college student majoring in electronics.

So here is my question: How much could we as an organization raise to
give Kurt a helper to really speed him up? Is this even a possibility?


Re: Re-introduction to the group

Richard Solomon <dickw1ksz@...>
 

Try the area Southeast of Tucson, but
not too close to me !!

I sometimes think I have no antenna
connected to the radio.

73, Dick, W1KSZ

On Mon, Feb 26, 2018 at 9:43 AM, Brian Bloom via Groups.Io <
analogaddict013=yahoo.com@groups.io> wrote:

On Sun, Feb 25, 2018 at 09:42 pm, jafinch78 . wrote:

On my laptop, using Chrome, I have to go into "Clear Browsing Data"
I'm shaking my head that I didn't even begin to think to do that...


You have the "United States National Radio Quiet Zone" in WV.
Interesting piece of information that I wasn't aware of... I just looked
it up and it's a good bit SE of my location. I'm in the city of Morgantown,
where we have a different kind of interference... WVU students who make it
a point to stay rated #1 party school in the nation.

I'm sure wikipedia is downplaying the importance of the zone and the
operations in Green Bank and Sugar Grove. It says "The NRAO actively
police the area for devices emitting noticeably high amounts of EMR...(etc
etc).. They possess no legal powers of enforcement, although the FCC can
impose a fine of $50." If they don't arrest people, then I bet any
deliberate or repeat violations get you your own second shadow for a wee
bit.

I always seem to physically feel a lot more relaxed and clear headed when
the power goes out in the neighborhood.. I wonder how I'd feel in zone 3...
because it's obvious I'll never be in zone 1 or 2.. I might have to plan a
little road trip in the near future just to scope this place out!




Ceramic strip soldering tek video

Brendan
 

Pretty awesome video. Wish I would have watched it before I cracked a ceramic strip.

https://www.youtube.com/watch?v=RpB5JqGo1co


Re: TekWiki Helper Idea. Brainstorm or Washout?

Vince Vielhaber
 

Spreadsheet might be too much work for some or some may just not like them. I fall into the second category. A simple text file would suffice.

Vince.

On 02/26/2018 11:18 AM, Dave Daniel wrote:
Hello,

I am also one of the TekWiki "helpers".

I see a couple of different relatively easy methods that could be used
to gather the information (I'm sure that there are lots of other ways of
which I have not thought). Some of these have been mentioned by others
on the list.

First, create an "options" spreadsheet and keep it on the groups.io
website. The spreadsheet would be organized by model, then option and
years that the option was available. If the objection that "many"
possible contributors do not have access to Excel, then I would create a
text file, as most who don't have access to Excel or OpenOffice (or
whatever it's called these days) probably won't have access to Word
either. A spreadsheet seems to me to be the most logical document type.

Gathering the information for the spreadsheet:

1. Members could add the information that they already have handy to the
spreadsheet. For instance, I have spreadsheets for most of my test
equipment that have model, s/n, options, price paid, original catalog
price, etc., information. I could extract the model/option information
(excepting the year data) pretty easily and add it to the options
spreadsheet.

2. As Robert Hay suggests, we could have each member interested in
contributing take one model and dig out the information from the
catalogs. and add the information to the options spreadsheet.

3. We could ask that members just start gathering the information as
they have time and update the spreadsheet. Of course, this would end up
creating a lot of duplicated effort.

DaveD

On 2/25/2018 8:26 PM, Dennis Tillman W7PF wrote:
Michael Terrell had an interesting idea that might save us time but as
near as I can tell it would only make a lot more work for Kurt at
TekWiki.
Michael's idea was to list the options for each model on TekWiki.

The more general question is what would it take to list every option
for every instrument on Kurt's web site. I know Kurt doesn't have the
time. He has a full time job already. I doubt anyone on this forum has
that much time to spare. I don't.

That started me thinking what it would take to do this. There are 40+
years of catalogs from 1965 to 2005 that Kurt roughly covers the
products from right now. Each catalog has anywhere from 100 (the
1960's) to <1000 instruments (the 2000's). Each description has a
section at the end with the options and their descriptions. The option
number and description would have to be logged, then incorporated into
each of Kurt's web pages. My best guess is it would take 1 man-year of
work on the part of a college student majoring in electronics.

So here is my question: How much could we as an organization raise to
give Kurt a helper to really speed him up? Is this even a possibility?

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Michael A. Terrell
Sent: Sunday, February 25, 2018 3:50 PM

It would be nice to list the known options for each model on Tekwiki,
to save people time in the future.

-----Original Message-----
From: Kevin Oconnor <@KO3Y>

In my recollection Tek had obscure option numbers for custom phosphors
on some scopes. I wonder if this is the case.
What is your phosphor color/persistence? My std 485 is blueish and fast.

Michael A. Terrell






Re: TekWiki Helper Idea. Brainstorm or Washout?

Brian Bloom
 

Definitely a great idea!!

It seems like the next step is to figure out a basic format for the spreadsheet and how people are going to go about adding it to a single document. Then once there's say, at least one full page, someone goes ahead and adds it to TekWiki and then changes can be reviewed and approved. What would be the most efficient way to get this done?

I've also been wondering about a spreadsheet for those readily available modern replacement parts that are a pain to figure out, but first things first.


Re: Re-introduction to the group

Brian Bloom
 

On Sun, Feb 25, 2018 at 09:42 pm, jafinch78 . wrote:

On my laptop, using Chrome, I have to go into "Clear Browsing Data"
I'm shaking my head that I didn't even begin to think to do that...


You have the "United States National Radio Quiet Zone" in WV.
Interesting piece of information that I wasn't aware of... I just looked it up and it's a good bit SE of my location. I'm in the city of Morgantown, where we have a different kind of interference... WVU students who make it a point to stay rated #1 party school in the nation.

I'm sure wikipedia is downplaying the importance of the zone and the operations in Green Bank and Sugar Grove. It says "The NRAO actively police the area for devices emitting noticeably high amounts of EMR...(etc etc).. They possess no legal powers of enforcement, although the FCC can impose a fine of $50." If they don't arrest people, then I bet any deliberate or repeat violations get you your own second shadow for a wee bit.

I always seem to physically feel a lot more relaxed and clear headed when the power goes out in the neighborhood.. I wonder how I'd feel in zone 3... because it's obvious I'll never be in zone 1 or 2.. I might have to plan a little road trip in the near future just to scope this place out!


Re: TekWiki Helper Idea. Brainstorm or Washout?

Dave Daniel
 

Hello,

I am also one of the TekWiki "helpers".

I see a couple of different relatively easy methods that could be used to gather the information (I'm sure that there are lots of other ways of which I have not thought). Some of these have been mentioned by others on the list.

First, create an "options" spreadsheet and keep it on the groups.io website. The spreadsheet would be organized by model, then option and years that the option was available. If the objection that "many" possible contributors do not have access to Excel, then I would create a text file, as most who don't have access to Excel or OpenOffice (or whatever it's called these days) probably won't have access to Word either. A spreadsheet seems to me to be the most logical document type.

Gathering the information for the spreadsheet:

1. Members could add the information that they already have handy to the spreadsheet. For instance, I have spreadsheets for most of my test equipment that have model, s/n, options, price paid, original catalog price, etc., information. I could extract the model/option information (excepting the year data) pretty easily and add it to the options spreadsheet.

2. As Robert Hay suggests, we could have each member interested in contributing take one model and dig out the information from the catalogs. and add the information to the options spreadsheet.

3. We could ask that members just start gathering the information as they have time and update the spreadsheet. Of course, this would end up creating a lot of duplicated effort.

DaveD

On 2/25/2018 8:26 PM, Dennis Tillman W7PF wrote:
Michael Terrell had an interesting idea that might save us time but as near as I can tell it would only make a lot more work for Kurt at TekWiki.
Michael's idea was to list the options for each model on TekWiki.

The more general question is what would it take to list every option for every instrument on Kurt's web site. I know Kurt doesn't have the time. He has a full time job already. I doubt anyone on this forum has that much time to spare. I don't.

That started me thinking what it would take to do this. There are 40+ years of catalogs from 1965 to 2005 that Kurt roughly covers the products from right now. Each catalog has anywhere from 100 (the 1960's) to <1000 instruments (the 2000's). Each description has a section at the end with the options and their descriptions. The option number and description would have to be logged, then incorporated into each of Kurt's web pages. My best guess is it would take 1 man-year of work on the part of a college student majoring in electronics.

So here is my question: How much could we as an organization raise to give Kurt a helper to really speed him up? Is this even a possibility?

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Michael A. Terrell
Sent: Sunday, February 25, 2018 3:50 PM

It would be nice to list the known options for each model on Tekwiki, to save people time in the future.

-----Original Message-----
From: Kevin Oconnor <@KO3Y>

In my recollection Tek had obscure option numbers for custom phosphors on some scopes. I wonder if this is the case.
What is your phosphor color/persistence? My std 485 is blueish and fast.

Michael A. Terrell




Re: 7603 15+ rail dead. Options?

Dave Voorhis
 

Excellent; thanks!

I might even have suitable transistors already knocking around in my parts bins.

Without much thought, I’d assumed the use of a dual packaging meant there was some critical need to match temperature as closely as possible, but if it's non-critical enough to solve with discrete devices and heatsink compound, that’s good.

On 26 Feb 2018, at 15:31, Craig Sawyers <c.sawyers@...> wrote:

Here you go - PN2484, the plastic packaged version of the 2N2484. Mouser 42c each or $3.51 for 10. Buy
ten and find two with close hfe, shove them in.

A replacement Q931 (2N5189) is easily and cheaply found, but a new replacement for Q936 (2N2919)
costs about twice what I paid for the oscilloscope and Q926 doesn t appear to have a specified
substitute though I presume any small NPN transistor capable of handling 60 volts or so would be
fine.
On 26 Feb 2018, at 15:23, Craig Sawyers <c.sawyers@...> wrote:

The only reason that Tek used a dual is - well because they were more easily available back then. I
would just take two generic NPN TO92 parts with gains of about 100-200 (you could easily match from a
bunch of them to 10% or so) and a Vceo of 60V or so, stick them together with heatsink compound and
shove them in.

It is just a long tailed pair error amplifier after all.

The actual single device that is in the dual is a 2N2484 (according to the Tek parts catalogue), which
are easily available and cheap in a TO18 package. Buy a bunch and match 2 for hfe to 10% and strap
them together. Job done.

Mouser $2 each or $18.50 for ten. Possibly even cheaper if you shop around.


Re: TekWiki Helper Idea. Brainstorm or Washout?

bobh@joba.com
 

A TekScopes helper could volunteer for one instrument. They would search the catalogs on TekWiki for their instrument.  They would save the option information by year in a file on groups.io files area like 485-options.doc.  Then Kurt's helpers could put it up on the TekWiki site.

It would be lot of downloads and bandwidth used from TekWiki just to get to the information for one instrument.

Bob.

On 2/26/2018 7:54 AM, Vince Vielhaber wrote:
It would be a lot quicker if the folks in the community were to contribute to a list kept in a central location, then Kurt's current helpers (of which I'm one) can take from that list and add to the site.

Vince.


On 02/25/2018 10:26 PM, Dennis Tillman W7PF wrote:
Michael Terrell had an interesting idea that might save us time but as near as I can tell it would only make a lot more work for Kurt at TekWiki.
Michael's idea was to list the options for each model on TekWiki.

The more general question is what would it take to list every option for every instrument on Kurt's web site. I know Kurt doesn't have the time. He has a full time job already. I doubt anyone on this forum has that much time to spare. I don't.

That started me thinking what it would take to do this. There are 40+ years of catalogs from 1965 to 2005 that Kurt roughly covers the products from right now. Each catalog has anywhere from 100 (the 1960's) to <1000 instruments (the 2000's). Each description has a section at the end with the options and their descriptions. The option number and description would have to be logged, then incorporated into each of Kurt's web pages. My best guess is it would take 1 man-year of work on the part of a college student majoring in electronics.

So here is my question: How much could we as an organization raise to give Kurt a helper to really speed him up? Is this even a possibility?

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Michael A. Terrell
Sent: Sunday, February 25, 2018 3:50 PM

It would be nice to list the known options for each model on Tekwiki, to save people time in the future.

-----Original Message-----
From: Kevin Oconnor <@KO3Y>

In my recollection Tek had obscure option numbers for custom phosphors on some scopes. I wonder if this is the case.
What is your phosphor color/persistence? My std 485 is blueish and fast.

Michael A. Terrell