Date   
Re: National Instruments GPIB-400

Don Bitters
 

The curious thing to note is no serial number listed, not sure but I believe they had serial no’s. on them, and the certificate would have it. So odds are it is bogus.
Don Bitters

Re: National Instruments GPIB-400

Bob Albert
 

Correct me if I am wrong, but it seems that the cables we are discussing are little more than some wire and a couple of connectors.  Perhaps there is some electronics in there as well; I suspect so.  But isn't it maybe just level shifting?
I don't know the technical details but it does seem that even $100 is ridiculous.  I can buy USB devices that can read many memory card formats for a couple of dollars, and I suspect those aren't any simpler than a GPIB interface cable.  I can buy the nanoVNA for less than $50.  So the cost of the interface is definitely out of line.
Yes there are companies that buy things regardless of price.  The manufacturers have probably analyzed the market and have decided that it's better to sell a few at high prices than many at lower prices.  It's their call and I am not in a position to argue.  But I vote with my money and my money isn't voting for those.
Yes I am "just" a hobbyist and my monry isn't a significant fraction of the market.  Value is important to me, if not to the big guys who do this stuff for a living (of which I used to be a part).
Bob

On Tuesday, October 1, 2019, 07:49:32 AM PDT, Leo Bodnar <leo@...> wrote:

On Mon, Sep 30, 2019 at 12:56 AM, John Miles wrote:

Also worth noting that the Chinese clones (if that's what they are) of the
GPIB-USB-HS adapters come with a CD containing driver versions that will work with them
They are real deal - from Agilent Technologies, Ins. themselves.
http://www.leobodnar.com/files/IMG_8306.jpg

Leo

Re: CORRECTION: Tom Jobe Drag Racing Legend; WAS [TekScopes] Tom Job

Chuck Harris
 

Tom was a friend, and somehow I don't think he would approve of
us making a fuss about his passing. He was not big on self
promotion, much preferring to praise and promote others that he
enjoyed.

I sensed something was up about a year ago when he seemed to be
tidying up loose ends. The tone and tenor of his emails seemed
somehow a little different.

One of those loose ends was to give me his remaining stock of
fan collets he made for the 2465. They were made on one of his
CNC lathes, and are simply beautiful. I told him so, but as
was typical, he ignored my praise.

I have 4 or 5 left, and if anyone needs one, I would be happy to
send one on. I would prefer that they be used for a scope that
matters to you, and not just something you want to spiff up for
a sale.

Tom will be missed.

-Chuck Harris

Dennis Tillman W7PF wrote:

George Lydecker misspelled Tom Jobe's name in his original post.

Tom Jobe was a 15+ year member of, and regular contributor to, TekScopes.
He was legendary in drag racing. You can read more about him at this address:
https://www.hotrod.com/articles/farewell-drag-racing-legend-tom-jobe-1940-2019/

More from George:
Tom Jobe was indeed a valued member of, and a regular contributor to, TekScopes for the past 15 years. Tom came from an automotive career at Honda and electronics was a secondary passion. He became involved with our group through his interest in using and understanding oscilloscopes in the context repairing electronics systems in cars.

I’ll have to ask Trevor, Tom’s friend and now mine, about what he knows of this early history. In any aspect, Tom was a good and kind person whose company I enjoyed and will miss greatly.

Dennis Tillman W7PF

Re: National Instruments GPIB-400

Leo Bodnar
 

On Mon, Sep 30, 2019 at 12:56 AM, John Miles wrote:

Also worth noting that the Chinese clones (if that's what they are) of the
GPIB-USB-HS adapters come with a CD containing driver versions that will work with them
They are real deal - from Agilent Technologies, Ins. themselves.
http://www.leobodnar.com/files/IMG_8306.jpg

Leo

Re: Tektronix 464 oscilloscope Dead screen

Colin Herbert
 

My 464 doesn't have a power light, but if either CH1 or CH2 is selected, then the light behind the "VOLTS/DIV" skirt will be illuminated. Turning up the "SCALE ILLUM" control should (if at least one of the bulbs is good) show the graticule illuminated. Additionally, the "X10 MAG" on the timebase controls and any of the "UNCAL" lights should be able to be turned on.
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Roger Evans via Groups.Io
Sent: 01 October 2019 12:23
To: TekScopes@groups.io
Subject: Re: [TekScopes] Tektronix 464 oscilloscope Dead screen

Are you sure that the 464 has a 'power' light? I can't find one in the manual and the coloured sleeve on the on/off switch that is visible in the On position often means that there isn't a specific power light. It is not uncommon for the timebase trigger light to flash on power up.

The 464, being a storage scope has some lethal voltages (600Volts DC) quite apart from the usual hazard areas of the CRT supplies. There is a 140Volt supply for the neon indicators on the front panel which is another hazard. Are you confident of your ability to safely make measurements and tests and identify the hazardous areas?

If you download the manual eg from w140.com/tekwiki you should begin by finding your way around the various boards with the power safely off. The next step is to find where you can measure the various low voltage DC supplies (+65V, +15V, +5V, -8V and -15V) and see if these are within spec. You don't give any indication of your experience and what equipment you have to hand so it is dificult to go any further.

Roger

Re: TM5006A manual

Phil
 

On Mon, Sep 30, 2019 at 10:08 PM, Dennis Tillman W7PF wrote:


www.artekmedia.com
Hi Dennis,
thank you so much for the advice! I just purchased it from Artek;-)

-Phil

Re: National Instruments GPIB-400

satbeginner
 

Obvious, especially with the number of spelling errors... :-)

Re: Tektronix 464 oscilloscope Dead screen

Roger Evans
 

Are you sure that the 464 has a 'power' light? I can't find one in the manual and the coloured sleeve on the on/off switch that is visible in the On position often means that there isn't a specific power light. It is not uncommon for the timebase trigger light to flash on power up.

The 464, being a storage scope has some lethal voltages (600Volts DC) quite apart from the usual hazard areas of the CRT supplies. There is a 140Volt supply for the neon indicators on the front panel which is another hazard. Are you confident of your ability to safely make measurements and tests and identify the hazardous areas?

If you download the manual eg from w140.com/tekwiki you should begin by finding your way around the various boards with the power safely off. The next step is to find where you can measure the various low voltage DC supplies (+65V, +15V, +5V, -8V and -15V) and see if these are within spec. You don't give any indication of your experience and what equipment you have to hand so it is dificult to go any further.

Roger

Re: National Instruments GPIB-400

Leo Bodnar
 

I wasn't serious, doh!
You can't imagine more arrogant and/or evil-minded fake than this.
Making a product copy is immoral. Creating a certificate to fool customers that it is real is devious.
Leo

Re: National Instruments GPIB-400

Colin Herbert
 

Well, it might look legitimate, but there are lots of mis-spellings. OK, some might be due to "T" and "Y" being next to one another on a QWERTY keyboard, but "Technologies" spelled "Technolngies", especially when the sheet has "Agilent Technologies" correctly spelled at the top? Or is it just laziness?
Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Leo Bodnar
Sent: 01 October 2019 09:10
To: TekScopes@groups.io
Subject: Re: [TekScopes] National Instruments GPIB-400

On Mon, Sep 30, 2019 at 06:29 PM, Kyle Rhodes wrote:

The only weird/fishy thing was the test certificate
Looks 100% legit to me https://pbs.twimg.com/media/DtR7a6EW0AAJzJB?format=jpg

I also think that HP/Agilent/Keysight/NI/Tektronix should stop messing with their expensive R&D and put all their creative efforts and manufacturing power into copying cheap Chinese copies of their own products and sell them on eBay - but now for $20. Consumers (aren't we all?) will win and the future will be infinitely bright.

Leo

Re: National Instruments GPIB-400

Ke-Fong Lin
 

Hi Dennis,

I'm rather saying that it would be technically and economically possible to propose those GPIB-USB interfaces for $100.
A reasonnable price would be $100. But it's not schocking that they are sold for $1000.
Test equipments are expensive and we are talking about business, not hobbyiest. That interface is only a small part and they are willing to pay.

Best regards,

Re: National Instruments GPIB-400

Leo Bodnar
 

On Mon, Sep 30, 2019 at 06:29 PM, Kyle Rhodes wrote:

The only weird/fishy thing was the test certificate
Looks 100% legit to me https://pbs.twimg.com/media/DtR7a6EW0AAJzJB?format=jpg

I also think that HP/Agilent/Keysight/NI/Tektronix should stop messing with their expensive R&D and put all their creative efforts and manufacturing power into copying cheap Chinese copies of their own products and sell them on eBay - but now for $20. Consumers (aren't we all?) will win and the future will be infinitely bright.

Leo

Re: National Instruments GPIB-400

 

Hi Ke-Fong Lin,
Why would anyone pay over $1,000 for a GPIB-USB interface if they could get one for $100? Have the people who buy these $1,000 GPIB-USB interfaces been fooled by clever marketing? Or are they just too dumb to realize they are paying too much for something that should only cost $100? Maybe it's because they don't know there are plenty of $100 GPIB-USB adapters on eBay.

Many of them even look like a National Instruments GPIB-USB-HS adapter. Presumably that makes them more reliable or else why wouldn't these Chinese clones just use their own packaging?

I know the members of TekScopes would really appreciate it if you would pick 10 different $100 GPIB-USB interfaces and test them to determine which ones were decent.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Ke-Fong Lin
Sent: Monday, September 30, 2019 4:21 AM
<snip>
But yes, that shouldn't cost more than a $100 to have a very decent GPIB-USB interface.




--
Dennis Tillman W7PF
TekScopes Moderator

Re: TM5006A manual

 

Hi Phil,

Artek has it. You can buy it on CD.
www.artekmedia.com
or via email at
manuals@...

Dennis Tillman W7PF

-----Original Message-----
From: T Phil
Sent: Monday, September 30, 2019 12:02 PM

Hi folks,
I am the happy owner of a working TM5006A. In a pretty good mechanical condition, it was in such a shabby cosmetic state that I took it apart for a thorough cleaning. I have the TM5006 literature and quickly found there are noticeable differences in the electrical design.
Is there anyone with the TM5006A manual available ? I looked in all the nice usual places online, but to no avail - I would like to check the proper adjustments and have the proper schematics at hand if anything goes astray someday.

Thank you !

regards
Phil




--
Dennis Tillman W7PF
TekScopes Moderator

Re: Sanity check- is the TM500 interface spacing .150" or .156"?

Dave Seiter
 

Many years ago I was doing some contract work for a company in the telecom industry and I came across a really odd ball edge connector.  I won't say it was the .150", because I don't recall, but it was one of a kind.  The company used plenty and paid way too much for them.  I spent a few days searching for an alternate source, but in the end the only option would have been custom tooling, and they didn't want to go that route.
-Dave

On Monday, September 30, 2019, 09:10:02 AM PDT, Leo Bodnar <leo@...> wrote:

On Mon, Sep 30, 2019 at 03:56 AM, Harvey White wrote:
I've seen 0.1, 0.125, and 0.156 in terms of fingers on various
equipment.  Other then flat flex cable, I've not seen much other than
that.  Don't ever remember seeing 0.150, though.
Molex has 0.098" pitch card edge series https://www.mouser.co.uk/ProductDetail/Molex/45845-0001?qs=sGAEpiMZZMtWxQ3D3EXBN%252B2s0vbr79RE1DLvj98Pzno%3D

Russian DIP ICs have 2.50mm pitch instead of 2.54mm.
This makes it 0.098".

This was not much of a problem on DIP-8 or DIP-14 ICs but made interchanging larger chips like i8080 with Russian knock-offs an act of utter desperation.
I call 25.0mm a "Russian inch"

Leo

Tektronix 464 oscilloscope Dead screen

shanshal@...
 

I have a Tektronix 464 oscilloscope, with dead screen , when switching on the power lights blinks on the screen but noting else , I tried all nobs and settings no use opened the cover all fuses are fine , found two capacitors leaking and in abnormal condition replaced them "temporary" with same value capacitors but nothing appeared on the screen . Any suggestion please

TM5006A manual

Phil
 

Hi folks,
I am the happy owner of a working TM5006A. In a pretty good mechanical condition, it was in such a shabby cosmetic state that I took it apart for a thorough cleaning. I have the TM5006 literature and quickly found there are noticeable differences in the electrical design.
Is there anyone with the TM5006A manual available ? I looked in all the nice usual places online, but to no avail - I would like to check the proper adjustments and have the proper schematics at hand if anything goes astray someday.

Thank you !

regards
Phil

Re: CORRECTION: Tom Jobe Drag Racing Legend; WAS [TekScopes] Tom Job

Glydeck
 

Dennis,

Thanks for the correction and update.

George

On Sep 30, 2019, at 6:20 PM, Dennis Tillman W7PF <@Dennis_Tillman_W7pF> wrote:

George Lydecker misspelled Tom Jobe's name in his original post.

Tom Jobe was a 15+ year member of, and regular contributor to, TekScopes.
He was legendary in drag racing. You can read more about him at this address:
https://www.hotrod.com/articles/farewell-drag-racing-legend-tom-jobe-1940-2019/

More from George:
Tom Jobe was indeed a valued member of, and a regular contributor to, TekScopes for the past 15 years. Tom came from an automotive career at Honda and electronics was a secondary passion. He became involved with our group through his interest in using and understanding oscilloscopes in the context repairing electronics systems in cars.

I’ll have to ask Trevor, Tom’s friend and now mine, about what he knows of this early history. In any aspect, Tom was a good and kind person whose company I enjoyed and will miss greatly.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Glydeck via Groups.Io
Sent: Saturday, September 28, 2019 5:28 PM
To: TekScopes@groups.io
Subject: [TekScopes] Tom Job

Gang,

I’m very sad to share the news that a good friend and member of our Tekscope community, Tom Job, has passed away. I for one will miss his kind and thoughtful posts. Tom truly embodied the spirit of Tekscope and was one of the most helpful people here. Tom even went so far as to learn how to create and post videos on YouTube to help a fellow a poster on our forum. Somehow, through Tekscope, I came to learn that Tom lived in the Los Angeles area and frequented the TRW amateur radio swap meet. We met up and became good friends, having lunch and sharing stories. Tom’s inclusive and warm hearted nature will be very much missed.

George






--
Dennis Tillman W7PF
TekScopes Moderator


CORRECTION: Tom Jobe Drag Racing Legend; WAS [TekScopes] Tom Job

 

George Lydecker misspelled Tom Jobe's name in his original post.

Tom Jobe was a 15+ year member of, and regular contributor to, TekScopes.
He was legendary in drag racing. You can read more about him at this address:
https://www.hotrod.com/articles/farewell-drag-racing-legend-tom-jobe-1940-2019/

More from George:
Tom Jobe was indeed a valued member of, and a regular contributor to, TekScopes for the past 15 years. Tom came from an automotive career at Honda and electronics was a secondary passion. He became involved with our group through his interest in using and understanding oscilloscopes in the context repairing electronics systems in cars.

I’ll have to ask Trevor, Tom’s friend and now mine, about what he knows of this early history. In any aspect, Tom was a good and kind person whose company I enjoyed and will miss greatly.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Glydeck via Groups.Io
Sent: Saturday, September 28, 2019 5:28 PM
To: TekScopes@groups.io
Subject: [TekScopes] Tom Job

Gang,

I’m very sad to share the news that a good friend and member of our Tekscope community, Tom Job, has passed away. I for one will miss his kind and thoughtful posts. Tom truly embodied the spirit of Tekscope and was one of the most helpful people here. Tom even went so far as to learn how to create and post videos on YouTube to help a fellow a poster on our forum. Somehow, through Tekscope, I came to learn that Tom lived in the Los Angeles area and frequented the TRW amateur radio swap meet. We met up and became good friends, having lunch and sharing stories. Tom’s inclusive and warm hearted nature will be very much missed.

George






--
Dennis Tillman W7PF
TekScopes Moderator

Re: Tektronix 561B - is it a decent collectors item?

David Holland
 

*If* it all works, its probably worthwhile. (IMO). The 560 series is
perfectly usable for what it is. I don't believe the series suffers
from the same HV transformer problem Roy mentioned, I thought that
problem was limited to the 540's...

The caveats, the 3B3 and 3T7 both use tunnel diodes, and the 3S7 uses
sampling diodes (unsurprisingly). I suspect they'd all be difficult
to source if things aren't working...

If you're satisfied with 10Mhz, its usable.... Mine works, and
they're simple enough to be still repairable...

<Shrug, IMO, YMMV, etc>

David

On Sun, Sep 29, 2019 at 10:27 PM <bradytmm@...> wrote:

Scope appears very clean, with 3A6 amplifier and 3B3 time base. Also includes a crusty looking Scope-Mobile 201-1 with drawer. The intriguing bit is the 3S7 sampler and 3T7 TDR sweep plug-ins (also looking somewhat crusty) sitting in the cart slots.
The scope belonged to a retired tech and appears to have been well cared for. The cart and TDR plug-ins not so much. Seller is asking $165 for the lot. Does this sound like a potential winner, or run away fast?
Thanks,
Tony