Date   
Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

Harvey White
 

'Tis true, only good for us.  When I was teaching, if I wanted to give something away, I had to give it to the school, and then, maybe, it might be given to a student (heaven forbid any kind of favoritism).  I did that a bit, and found that the people who "got" it, well, some of them were not the best students, and left it by the curb when they moved.    You can't become attached to what you give away.

I'm still open to the idea of helping people, trade, etc; but AFAIK, there are not even any makerspaces near me, nor any clubs. I certainly don't know anyone who could use one of three excess HP16702A logic analyzers (you provide the blades).  I don't even know much of anyone who does microprocessor/FPGA/Graphics development.  (read, I don't think I know of any, certainly not local).

With a 6 call sign, you're on the opposite coast, since I live in Florida.

The other problem is that it took me until about 3 years ago to get the lab to the point where I've only got things I'd "like" to have, rather than things I "need" to have to do work.

I'm not sure what I'd want to give away, but I do have an HP1640 serial analyzer that would be up for grabs.

Harvey

On 1/14/2020 9:58 PM, Bob Albert via Groups.Io wrote:
Harvey, I too have better stuff.  But it's good only for us.  There are few who can, as you say, care for any of it.  And what member of such a group would care about measuring volts to six or eight digits, or how disciplined an oscillator is, or how many Ohms a resistor differs from its marking?  Testing tubes may be fun for someone who has a tube tester, but that's not exactly a universal feeling.
I would love to be the recipient of more goodies, so if anyone out there is downsizing and lives local to me, PM me and I'll buzz over and get some more toys.  But they are just toys; I don't do serious work any more.
Bob K6DDX
On Tuesday, January 14, 2020, 06:49:36 PM PST, Harvey White <madyn@...> wrote:
If there is a problem with maker spaces, it may be that there are too
many types of people involved.  What you'd ideally want is someone who
appreciates the equipment for itself, can use it, and repair it.

You may not get that.

Have you gone to a craft faire and seen sculptures made from gears,
pieces of typewriters, old switches and whatever?  All put together in a
haphazard (but artistic............) manner and completely non-functional?

You might get that instead.

I think it very much depends on the place involved, though

A maker space is an open lab where people can go to get resources.
Computers, lathes, drill presses, 3D printers, oscilloscopes, etc.  Nice
idea, but firstly (it costs money), and secondly, most people here may
have better equipment, and thirdly, I have no idea of who is in charge
and how well the equipment is cared for.

Good idea, but for the most part, I have, for what I want, better stuff
than they have, and it's paid for, and in the lab.  That's just me, though.

Harvey


On 1/14/2020 11:35 AM, W1RS wrote:
Perhaps the "Maker Spaces" concept could work.  I have heard of them but am not familiar with the maker universe.  Maybe somebody else could enlighten me.






Re: Tek Scope Cart - Model 3 or K213?

Harvey White
 

Mine is about 35.5 inches ground to bottom of tray.  Hard to see if it's level since it's somewhat in storage.  The other notch (perhaps tilted) was 34 inches lip of tray to ground.  Mine has a lower tray on which there's a TM504.

Harvey

On 1/15/2020 4:22 AM, oakley@... wrote:
Hi All,

I'm in desperate need for a scope cart. I've got a 2465BDM, 2467B, and a Fluke PM3394B and I'd like to mount them to the same cart. Both the Model 3 and the K213 carts appear to be able to handle the scopes' weight.

After collecting as many JPGs as reasonably possible, it appears to me that the K213 is shorter than the Model 3, but I can't find any dimensional information for either of these carts. Does anyone know the overall height of either of these carts?

I'm wondering what you experienced souls would recommend?

Does one cart have any particular features over the other? Is there a reason to focus on acquiring one over the other?

Thanks so much.

Tom in SLC


Re: Tek Scope Cart - Model 3 or K213?

John Griessen
 

On 1/15/20 7:36 AM, Colin Herbert via Groups.Io wrote:
Hi Tom,
I have a Labcart Model 3. It is 39.5" high, 28" long (including the handle of the drawer) and 18" wide, approximately. These measurements exclude the castoring wheels.
A little more detail on model 3:

35 inches to top tray surface -- the 39" is the top of the pivot of the frame.
48 inches to top of a 4 bay 7000 scope on top tray.
other trays below top one are adjustable... mine are at -15-1/4 inches and -8.5 inches.
15-1/4 below is the lowest set of holes I think.
Top of lower drawer is at 12 inches from floor.

Re: Tek Scope Cart - Model 3 or K213?

Colin Herbert
 

Hi Tom,
I have a Labcart Model 3. It is 39.5" high, 28" long (including the handle of the drawer) and 18" wide, approximately. These measurements exclude the castoring wheels. I hope this helps a little.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of oakley@...
Sent: 15 January 2020 09:22
To: TekScopes@groups.io
Subject: [TekScopes] Tek Scope Cart - Model 3 or K213?

Hi All,

I'm in desperate need for a scope cart. I've got a 2465BDM, 2467B, and a Fluke PM3394B and I'd like to mount them to the same cart. Both the Model 3 and the K213 carts appear to be able to handle the scopes' weight.

After collecting as many JPGs as reasonably possible, it appears to me that the K213 is shorter than the Model 3, but I can't find any dimensional information for either of these carts. Does anyone know the overall height of either of these carts?

I'm wondering what you experienced souls would recommend?

Does one cart have any particular features over the other? Is there a reason to focus on acquiring one over the other?

Thanks so much.

Tom in SLC

Re: MEMBERS PLEASE READ: Our annual Group.io payment is due in 2 weeks.

Leo Bodnar
 

Hello Dennis,

I am embarrassed to ask, but when can I have my turned down donation back?

Thanks
Leo

On Thu, Jan 2, 2020 at 11:06 PM, Dennis Tillman W7PF wrote:


Hi Leo, and everyone else,

First to Leo:
I am stunned by your generosity but this creates a huge dilemma for me because
I asked for small contributions. I cannot accept you most generous offer
because it is far too much. My goal in asking for small contributions was to
give everyone who has gotten some value out of belonging to TekScopes an
opportunity to say thanks based on their ability to pay and the value they
have received.

For Leo and everyone else:
For reasons neither Marian nor I remember, because it happened so long ago,
the PayPal account was set up in her name. That only came to our attention the
other day when it caused confusion. We are in the process of adding my name to
the account to clear up any future confusion. We have been married for 35+
years. What's hers is mine and what's mine is hers (except she doesn't want
the Tektronix things).

So far Michael Dunn and I have received over 150 contributions through PayPal,
one through Vimeo, and I believe one will be coming through Zelle. As soon as
the donations drop to a trickle which I expect by the beginning of next week I
will post a notice that anyone who still wants to contribute has 24 hours
left. Then it will take me a day to make a spreadsheet of who contributed and
what the contribution was. I believe the safest way to do this will be to list
just the PayPal transaction numbers and the amounts personal information is
revealed for privacy reasons. This way everyone can check that their
contribution was received and entered.

For the long term Michael Dunn and I have discussed what should be done next
and how to insure the contributions will be safe and secure if something
should happen to either one of us. I have also contacted Groups.io to find out
if they allow paying a few years in advance.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Leo Bodnar
Sent: Thursday, January 02, 2020 2:03 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] MEMBERS PLEASE READ: Our annual Group.io payment is
due in 2 weeks.

Dennis,

Given the mess with account name and group.io emails handling could you please
post the list of names you have received the donations from?

On the 31st of December, moments after your appeal was posted, I have sent you
the whole $340 - enough to cover all immediate costs for 2019 and 2020.
PayPal said It went straight into Marian Tillman account. I was slightly
bemused to see it's not yours.
Since then - for the last three days - I have not heard anything - neither
from you nor the PayPal account owner. This does not sound right.

On Tue, Dec 31, 2019 at 03:42 AM, Dennis Tillman wrote:
I plan to give an accounting of the total to the group once the
contributions stop. Anything over $340 will be set aside.

What if they never stop? How do we know you have received the funds?

Leo

--
Dennis Tillman W7PF
TekScopes Moderator

Tek Scope Cart - Model 3 or K213?

oakley@...
 

Hi All,

I'm in desperate need for a scope cart. I've got a 2465BDM, 2467B, and a Fluke PM3394B and I'd like to mount them to the same cart. Both the Model 3 and the K213 carts appear to be able to handle the scopes' weight.

After collecting as many JPGs as reasonably possible, it appears to me that the K213 is shorter than the Model 3, but I can't find any dimensional information for either of these carts. Does anyone know the overall height of either of these carts?

I'm wondering what you experienced souls would recommend?

Does one cart have any particular features over the other? Is there a reason to focus on acquiring one over the other?

Thanks so much.

Tom in SLC

Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

Tom Gardner
 

In my experiences, hackspaces want/need simple easy /working/ equipment, and since space is limited it has to be /small/.

My local one has so many scopes that they give away the really crap ones, and even so there 5 stored on a high shelf. Including a Telequipment DM63 dual beam three channel storage scope (working but shows 50Hz intensity variations:) )

Even so people occasionally propose getting a modern Rigol 1054, because it is easy to use.

So by all means try them, but don't expect them to want boat anchors and anything they have to fix.

On 15/01/20 07:26, Dave Seiter wrote:
The Maker Spaces in the SF bay area are dropping like flies; the only one still around for sure that I know of is the Hacker Dojo, and that's basically a software space.  I love the idea of maker spaces, but I'd hate to have to use one unless it was for equipment I don't have, like a plasma table.  (Why? I don't want to sit through training classes and skill tests, just give me the manual, tell me about the quirks, and let me run with it.)
-Dave
At my local hackspace the equipment is frequently damaged by people making basic mistakes, sometimes directly against instructions given during inductions. One example: leaving a Tek 2235 floated for the next member to find. I was not amused.

The basic problem is that "random" people wander in off the street, and many people's creative experience is little more than "cut, paste, glue" found in nursery school!

They are wrestling with how to reduce that; I expect they will adopt some obvious "authoritarian" techniques after all alternatives have been exhausted.

While corporate bureaucracy may be slow, distributed volunteer organisations are worse :)

Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

Dave Seiter
 

The Maker Spaces in the SF bay area are dropping like flies; the only one still around for sure that I know of is the Hacker Dojo, and that's basically a software space.  I love the idea of maker spaces, but I'd hate to have to use one unless it was for equipment I don't have, like a plasma table.  (Why? I don't want to sit through training classes and skill tests, just give me the manual, tell me about the quirks, and let me run with it.)
-Dave

On Tuesday, January 14, 2020, 03:31:18 PM PST, toby@... <toby@...> wrote:

On 2020-01-14 11:35 AM, W1RS wrote:
Perhaps the "Maker Spaces" concept could work.  I have heard of them but am not familiar with the maker universe.  Maybe somebody else could enlighten me.
In practice it doesn't work for preservation, unfortunately. Also these
spaces generally don't have the room/funding for museum type operations.

--T


Re: Tektronix 532 LV rail shorted

John Williams
 

This probably is a stupid question, but have you checked that the cans of the electrolytics are properly insulated from ground with the fibre wafers underneath and the mounting screws not grounding? I thought you had.

Re: Tektronix 532 LV rail shorted

John Williams
 

Good work Randy. You are making progress. Troubleshooting is as much about eliminating suspects as it is about finding the real cause. I have seen more scopes than I care to remember where a former owner has made a terrible mess trying to haphazardly find the problem. Kinda like some auto shops, if you get my meaning. Take a break that usually helps.

Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

Harvey White
 

Wait, you found a makerspace where they *knew* Latin?

Harvey

On 1/14/2020 9:12 PM, Tam Hanna wrote:
With mostly toxic or at least hostile-to-old-farts audience.


At one makerspace, someone literally thought I had invented si vis pacem, para bellum ON THE FLY.


Tam

Re: Tektronix 532 LV rail shorted

randolphbeebe@...
 

I am certainly thrashing around on the hook with this one! You got me thinking however about isolating the problem power source and when I test the resistance between ground and the the (-) side of C640 it shows a dead short. This is also true with Pins 16 and 17 disconnected from the transformer. I also checked the plug-in connector pin 19 as Rajesh suggested and found 100 ohms which is what I would suspect to see through R110 and some type of short on the other side. The connector is in good condition. All the ceramic strips look good too.

When I pull V605 and V606 C640 does not cook.

I did correct C110 and connected the (+) to ground as was suggested. The cap is new but I re-checked that and it checks good.

I am thinking the problem is directly associated with the -150V supply but now the scope is is worse off than it was earlier.. just a dead short. I am pretty gentle with stuff and check my work so the only thing I can think of is something is shorted or damaged under the sockets of V605 and 606. These are mounted directly on top of the power transformer and maybe the act of removing and replacing rectifier tubes damaged something. Or possibly repeatedly stressing the new C640 shorted it out.

Anyway I will pop the top off the transformer and check the socket wiring but for now I need a break from this thing. I shouldn't work when I am frustrated...

Cheers,

Randy

Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

Bob Albert
 

Harvey, I too have better stuff.  But it's good only for us.  There are few who can, as you say, care for any of it.  And what member of such a group would care about measuring volts to six or eight digits, or how disciplined an oscillator is, or how many Ohms a resistor differs from its marking?  Testing tubes may be fun for someone who has a tube tester, but that's not exactly a universal feeling.
I would love to be the recipient of more goodies, so if anyone out there is downsizing and lives local to me, PM me and I'll buzz over and get some more toys.  But they are just toys; I don't do serious work any more.
Bob K6DDX

On Tuesday, January 14, 2020, 06:49:36 PM PST, Harvey White <madyn@...> wrote:

If there is a problem with maker spaces, it may be that there are too
many types of people involved.  What you'd ideally want is someone who
appreciates the equipment for itself, can use it, and repair it.

You may not get that.

Have you gone to a craft faire and seen sculptures made from gears,
pieces of typewriters, old switches and whatever?  All put together in a
haphazard (but artistic............) manner and completely non-functional?

You might get that instead.

I think it very much depends on the place involved, though

A maker space is an open lab where people can go to get resources. 
Computers, lathes, drill presses, 3D printers, oscilloscopes, etc.  Nice
idea, but firstly (it costs money), and secondly, most people here may
have better equipment, and thirdly, I have no idea of who is in charge
and how well the equipment is cared for.

Good idea, but for the most part, I have, for what I want, better stuff
than they have, and it's paid for, and in the lab.  That's just me, though.

Harvey


On 1/14/2020 11:35 AM, W1RS wrote:
Perhaps the "Maker Spaces" concept could work.  I have heard of them but am not familiar with the maker universe.  Maybe somebody else could enlighten me.



Re: Stan Griffiths Craigslist Posting

Ryan Scott
 

Greetings to the group.
I have been at the sale the last 2 Saturdays and I can tell you it's fairly picked over.  The tube pirates have struck, the wall of tubes have been sold, and several scopes and plug ins have had the audio type tubes removed.  It's definitely worth going if you are looking for lots of parts, plug ins, as well as 500 series scopes, of course, minus some of the tubes.  Stan has an impressive collection, a lot of history in that shop.  
Ryan, N7QJ

On Tuesday, January 14, 2020, 03:02:30 PM PST, Vince Vielhaber <vev@...> wrote:

I now see what it was failing and wrapping.  In the CL URL there's a
space after shop-  so it comes out as "shop- sale".

Vince.

On 01/14/2020 03:50 PM, Greg Muir via Groups.Io wrote:
PS - in all of the above Craigslist URLS, the HTML addy is missing.

https://seattle.craigslist.org/skc/ele/d/beaverton-estate-radio-repair-shop-%20sale/7055039838.html

Greg


--
  K8ZW  http://www.metalworkingfun.com   http://www.hamradio.fun

Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

Harvey White
 

If there is a problem with maker spaces, it may be that there are too many types of people involved.  What you'd ideally want is someone who appreciates the equipment for itself, can use it, and repair it.

You may not get that.

Have you gone to a craft faire and seen sculptures made from gears, pieces of typewriters, old switches and whatever?  All put together in a haphazard (but artistic............) manner and completely non-functional?

You might get that instead.

I think it very much depends on the place involved, though

A maker space is an open lab where people can go to get resources.  Computers, lathes, drill presses, 3D printers, oscilloscopes, etc.  Nice idea, but firstly (it costs money), and secondly, most people here may have better equipment, and thirdly, I have no idea of who is in charge and how well the equipment is cared for.

Good idea, but for the most part, I have, for what I want, better stuff than they have, and it's paid for, and in the lab.  That's just me, though.

Harvey

On 1/14/2020 11:35 AM, W1RS wrote:
Perhaps the "Maker Spaces" concept could work. I have heard of them but am not familiar with the maker universe. Maybe somebody else could enlighten me.


Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

Tam Hanna
 

With mostly toxic or at least hostile-to-old-farts audience.


At one makerspace, someone literally thought I had invented si vis pacem, para bellum ON THE FLY.


Tam

--
With best regards
Tam HANNA

Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at https://www.instagram.com/tam.hanna/

Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

John Griessen
 

On 1/14/20 5:31 PM, toby@... wrote:
In practice it doesn't work for preservation, unfortunately. Also these
spaces generally don't have the room/funding for museum type operations.

Yes the one her in Austin had cardboard file boxes as a unit of storage for members
once and probably not much more now...

Re: Commercial Circuit Simulator that includes vacuum tube library is now free.

Renée
 

thanks JIm
that is wonderful news!!! L 18.2 and 19.1 mint here, no current MS stuff ..do have CPM, DOS, Win 3.1, XP old machine.......wonder if they still work...hmmmmm
Renée

On 2020-01-14 10:58 a.m., Jim Tibbits wrote:
And for all us (L)users...."linux users"...works fine with WINE on my mint
19.2

Jim

On Tue, Jan 14, 2020 at 10:38 AM Ancel <@Protofabtt> wrote:

https://hackaday.com/2020/01/08/commercial-circuit-simulator-goes-free/

Looks useful, a step up from LTspice, no micro-controllers though.
Ancel



.

Re: Ultimately recyclers have to scrap our treasures - an idea so maybe some can survive

toby@...
 

On 2020-01-14 11:35 AM, W1RS wrote:
Perhaps the "Maker Spaces" concept could work. I have heard of them but am not familiar with the maker universe. Maybe somebody else could enlighten me.
In practice it doesn't work for preservation, unfortunately. Also these
spaces generally don't have the room/funding for museum type operations.

--T


Re: Stan Griffiths Craigslist Posting

Vince Vielhaber
 

I now see what it was failing and wrapping. In the CL URL there's a space after shop- so it comes out as "shop- sale".

Vince.

On 01/14/2020 03:50 PM, Greg Muir via Groups.Io wrote:
PS - in all of the above Craigslist URLS, the HTML addy is missing.

https://seattle.craigslist.org/skc/ele/d/beaverton-estate-radio-repair-shop-%20sale/7055039838.html

Greg