Topics

Tm500 Extender on eBay


John Williams
 

I purchased one of the TM500 extenders from an eBay seller for $70. It is still in the mail but looks really good on the listing. Does anybody here know about these? Thanks.


John Williams
 

Received the extender yesterday. I haven’t used it yet but looks really good so far. Excellent packaging too. Stay tuned for a user report.


Eric
 

Be careful not to plug the pluging upside down it is an easy mistake to
make with the flexible extender from tek

Eric

On Tue, Feb 9, 2021, 3:40 PM John Williams <books4you4@mail.com> wrote:

Received the extender yesterday. I haven’t used it yet but looks really
good so far. Excellent packaging too. Stay tuned for a user report.






Michael W. Lynch
 

On Tue, Feb 9, 2021 at 03:56 PM, Eric wrote:


Be careful not to plug the pluging upside down it is an easy mistake to
make with the flexible extender from tek
I will admit, I made this mistake a long time ago. The Module end of my flexible extender does not have a "key", so the module end can be reversed with "not so good" results. In my haste, I got the thing plugged in upside down, turned on the power and released the magic smoke from a module. Now I am careful to check twice and plug once.

--
Michael Lynch
Dardanelle, AR


 

John,

Is this the newly manufactured extender that has labeled test points for all the bus signals? If so, I'm very interested to hear your experiences with it, as I have been thinking of buying one too.

-- Jeff Dutky


Eric
 

Yea let me know I would be interested as well if that is the case?

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Jeff Dutky
Sent: Tuesday, February 9, 2021 7:56 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tm500 Extender on eBay

John,

Is this the newly manufactured extender that has labeled test points for all the bus signals? If so, I'm very interested to hear your experiences with it, as I have been thinking of buying one too.

-- Jeff Dutky


John Williams
 

Sure thing Jeff. I will let you know how it works. But at less than a hundred bucks landed it seemed worth a chance.


John Williams
 


Carsten Bormann
 

On 2021-02-11, at 08:55, John Williams <books4you4@mail.com> wrote:

Next listing:

https://www.ebay.com/itm/Tektronix-TM500-extender-card-with-test-points-and-gold-edge-card-contacts/184659830272?hash=item2afe956600:g:gp4AAOSw1m5gAv6x

He seems to be listing these one at a time. Once one sells another pops up.
The photos don’t show bevel edges, so you will damage the card-edge connectors in the unit.

I do not begrudge him the price, but that doesn’t mean I would want to pay that…

Otherwise nice basic unit. And the prop-up block :-)

Grüße, Carsten


 

Carsten Borman wrote:

The photos don’t show bevel edges, so you will damage the card-edge connectors in the unit.
are you talking about the bevels at the key positions (between 5 & 6 and 22 & 23)?

what kind of damage will the un-bevelled card edge connectors cause?

-- Jeff Dutk


Stephen Bell
 

From the photos the edges appear to be bevelled although it doesn't seem to a very large bevel so the insertion force into the connector will be quite high.


Dale Chayes
 

The one I have on my bench has a little bit of chamfer on the card edge. Without careful measurement it appears that the bevel is on par with or more than on a couple of modules (SG504 and DM502) that I had a quick look at.

My bench is STILL such a mess that I have not had a chance to work with it.

I just tried brief insertion on the floor and was not willing to push hard enough……

More when I have time,

-Dale

On Feb 11, 2021, at 03:02 , Carsten Bormann <cabocabo@gmail.com> wrote:

On 2021-02-11, at 08:55, John Williams <books4you4@mail.com> wrote:

Next listing:

https://www.ebay.com/itm/Tektronix-TM500-extender-card-with-test-points-and-gold-edge-card-contacts/184659830272?hash=item2afe956600:g:gp4AAOSw1m5gAv6x

He seems to be listing these one at a time. Once one sells another pops up.
The photos don’t show bevel edges, so you will damage the card-edge connectors in the unit.

I do not begrudge him the price, but that doesn’t mean I would want to pay that…

Otherwise nice basic unit. And the prop-up block :-)

Grüße, Carsten






Michael W. Lynch
 

I would closely look at the edge of that card. there must be a bevel on the edge or you risk ruining the mainframe connector. Also, be very careful to NOT allow any excess torque on the card while repairing the plug in.

After repairing many TM50X plug-ins, I am eternally grateful that I was able to be able to purchase two excellent flexible extenders. The rigid card would be much better than nothing, but I prefer the flexible cable extenders myself.

One of the users here made and sold excellent kits at one time.

Judging from the price I paid for mine, this rigid card seems expensive. . . . or the kit for the flexible extenders was too cheap?

Good luck with your repairs!

--
Michael Lynch
Dardanelle, AR


Roy Thistle
 

On Thu, Feb 11, 2021 at 07:21 AM, Michael W. Lynch wrote:


there must be a bevel on the edge or you risk ruining the mainframe connector.
this rigid card seems expensive
Well it sold. So someone is perhaps on their way to busting a brittle connector.
I'd recommend a file... but, the selling price is too much... and the risk of busting up the connector (by insertion, or torquing, seems too great.)
It seems like something, someone made up: but either didn't understand insertion force, or didn't want to pay for getting the edges bevelled by the pcb fab.


Michael W. Lynch
 

On Thu, Feb 11, 2021 at 10:51 AM, Roy Thistle wrote:



Well it sold. So someone is perhaps on their way to busting a brittle
connector.
I'd recommend a file... but, the selling price is too much... and the risk of
busting up the connector (by insertion, or torquing, seems too great.)
It seems like something, someone made up: but either didn't understand
insertion force, or didn't want to pay for getting the edges bevelled by the
pcb fab.
Yes, I agree with this. I would recommend to be very careful to NOT damage the mainframe connectors, either through insertion problems, side loading or torque forces applied to the mainframe connector. .

--
Michael Lynch
Dardanelle, AR


John Williams
 

One question for you Roy. You have mentioned a time or two that this is too expensive. So I wonder what you would consider a fair price. It seems to me that this is considerably cheaper than the flexible ones I have seen listed for upwards of $250 bucks. I think at $70 that the guy making these is probably not making a lot of money here. So please let us know what we should be looking to pay for something like this. Thanks.


Ke-Fong Lin
 

The edge connector (EDAC 307-056-500-202) is less than 8 euros at Mouser.
The extender PCB is a bit larger than usual, but a chinese fab (say JLCPCB) will probably do it.
It's probably a bit more expensive if using a US fab.
But I don't see how the PCB is going to cost more than 20 euros, even if made in the US.
So yes, $70 is a bit stiff.

To give you an idea, I've done a small project (https://github.com/anotherlin/tek_tm_ext) for a flexible TM500 extender.
The total BOM cost is less than 20 euros for sure.
JLCPCB charges around 16 euros for 5 extender PCB (ENIG).

One question for you Roy. You have mentioned a time or two that this is too
expensive. So I wonder what you would consider a fair price. It seems to me
that this is considerably cheaper than the flexible ones I have seen listed
for upwards of $250 bucks. I think at $70 that the guy making these is
probably not making a lot of money here. So please let us know what we should
be looking to pay for something like this. Thanks.


Ken Eckert
 

Hi;

I think his price is very reasonable. There are two costs, materials and
time. To look at it from too expensive based solely on material costs is
doing a huge disservice to the guy.

The time he spends ordering and receiving parts, dealing with the bills
(even on credit card) and inquiries is all time. Then there is the time
spent assembling, packing, running out to do the shipping and it goes on.

I do not know what you may earn per hour in your day job but would you
donate your time and effort to the company?

Especially as one ages and the years behind you are bigger than what is in
front of you, most of us come to a realization that your time and health is
the only wealth that you have.

I think he is probably just breaking even or not even in some cases.

On Thu, Feb 11, 2021 at 2:18 PM Ke-Fong Lin <anotherlin@gmail.com> wrote:

The edge connector (EDAC 307-056-500-202) is less than 8 euros at Mouser.
The extender PCB is a bit larger than usual, but a chinese fab (say
JLCPCB) will probably do it.
It's probably a bit more expensive if using a US fab.
But I don't see how the PCB is going to cost more than 20 euros, even if
made in the US.
So yes, $70 is a bit stiff.

To give you an idea, I've done a small project (
https://github.com/anotherlin/tek_tm_ext) for a flexible TM500 extender.
The total BOM cost is less than 20 euros for sure.
JLCPCB charges around 16 euros for 5 extender PCB (ENIG).


One question for you Roy. You have mentioned a time or two that this is
too
expensive. So I wonder what you would consider a fair price. It seems to
me
that this is considerably cheaper than the flexible ones I have seen
listed
for upwards of $250 bucks. I think at $70 that the guy making these is
probably not making a lot of money here. So please let us know what we
should
be looking to pay for something like this. Thanks.






John Williams
 


Dave Seiter
 

Not to mention ebay and any other fees.  When I sell items I want as much profit as possible.  I might have bought one of them, but I found usable PCB in my stash last year.
-Dave

On Thursday, February 11, 2021, 02:51:16 PM PST, Ken Eckert <eckertkp@gmail.com> wrote:

Hi;

I think his price is very reasonable. There are two costs, materials and
time. To look at it from too expensive based solely on material costs is
doing a huge disservice to the guy.

The time he spends ordering and receiving parts, dealing with the bills
(even on credit card) and inquiries is all time. Then there is the time
spent assembling, packing, running out to do the shipping and it goes on.

I do not know what you may earn per hour in your day job but would you
donate your time and effort to the company?

Especially as one ages and the years behind you are bigger than what is in
front of you, most of us come to a realization that your time and health is
the only wealth that you have.

I think he is probably just breaking even or not even in some cases.

On Thu, Feb 11, 2021 at 2:18 PM Ke-Fong Lin <anotherlin@gmail.com> wrote:

The edge connector (EDAC 307-056-500-202) is less than 8 euros at Mouser.
The extender PCB is a bit larger than usual, but a chinese fab (say
JLCPCB) will probably do it.
It's probably a bit more expensive if using a US fab.
But I don't see how the PCB is going to cost more than 20 euros, even if
made in the US.
So yes, $70 is a bit stiff.

To give you an idea, I've done a small project (
https://github.com/anotherlin/tek_tm_ext) for a flexible TM500 extender.
The total BOM cost is less than 20 euros for sure.
JLCPCB charges around 16 euros for 5 extender PCB (ENIG).


One question for you Roy. You have mentioned a time or two that this is
too
expensive. So I wonder what you would consider a fair price. It seems to
me
that this is considerably cheaper than the flexible ones I have seen
listed
for upwards of $250 bucks. I think at $70 that the guy making these is
probably not making a lot of money here. So please let us know what we
should
be looking to pay for something like this. Thanks.