Re: [time-nuts] Prologix USB-GPIB Controller

[Didier Juges]

I buy a lot of stuff from eBay and Amazon, including batteries on occasion. 
Invariably, there has been a pretty good correlation between price and quality, 
but considerably more so with batteries. 

It really sucks paying $100 or more for a quality OEM laptop battery, but the 
alternative is to throw away $40 and getting junk that at best will not be very 
useful and at worse will burn your house.

Batteries are a tough business, ask Samsung...

Didier KO4BB

On October 10, 2016 1:13:45 PM EDT, "Dr. David Kirkby (Kirkby Microwave Ltd)" 
 wrote:
>On 10 October 2016 at 09:35, Charles Steinmetz 
>wrote:
>
>> Poul-Henning wrote:
>>
>> And for voltage references, "pre-owned" is likely to mean "better".
>>>
>>
>> Perhaps, but third-world recyclers are not known for gentle treatment
>> during the parts removal process.
>
>
>I had some cheap ($10) GPS receiver boards shipped to me in a plastic
>kitchen bag from yikunhk on eBay. 4 boards in the same bag, all
>scratching
>each other. The bag was not anti-static.
>
>There are all number of possible explanations of why boards can be made
>so
>cheaply, when the ICs appear to cost more than the boards.
>
>* The chips are counterfeit
>* The chips are similar to what they are supposed to be, but have been
>relabeled.
>* They are made at the same factory as the real devices, on what I've
>heard
>described as the "ghost shift", where they are not officially made, but
>are
>the same devices.
>* They are recycled.
>* They are stolen.
>
>It is anyone's guess once you start buying semiconductor devices from
>eBay.
>Maybe you are lucky, maybe you are not.
>
>You dramatically increase the probability a part is good if sourced
>from a
>reputable source (e.g. RS or Farnell in the UK). That is not to say
>that
>the parts are not counterfeits, as even the best suppliers can get
>caught,
>but they are more likely to be ok.
>
>I recently bought a supposedly original Samsung battery for my Samsung
>Galazy S3 phone from a local shop. The phone had all sorts of issues
>with
>this battery, so I concluded it was a poor counterfeit.  I thought I'd
>be
>safe buying directory from Amazon (not a 3rd party), but on reading
>reviews
>on Amazon, I was not convinced those were genuine Samsung batteries
>either,
>so I did not buy from Amazon.
>
>Eventually I bought a battery from the Samsung website. The phone now
>works
>ok.  I don't know if  Samsung actually make the batteries themselves,
>but I
>think I have a better chance of buying from the Samsung website than
>from
>anywhere else.
>
>I've had "Duracell" batteries leak. At one time I used to blame
>Duracell,
>but now it has cross my mind whether they might have been bought on
>eBay
>and were counterfeits. I can't recall where they were purchased, but
>now I
>will only purchase batteries from sources I consider reputable.
>
>Dave.
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-- 
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Re: [time-nuts] Prologix USB-GPIB Controller

[Alan Melia]

There is another way to those possible Dave Kirby quotes.remember 
silicon foundry lines run lots of wafers through the fab line at one time 
these are tested automatically and inked at the end of the process and put 
inro store. The wafer are drawn and cut and encapsulated (sometime halfway 
round the world from the fab line) when required. It being possible that 
high yeilding wafers are drawn first. It is possible low yeilding wafers my 
be returned to the silicon refiner to use as material for a new batch of 
rods (boule). These may be intercepted or bought by a small company for whom 
it is worthwhile to bond up chip from low yield wafers. On the other hand 
they could wash off the ink (testfail marker) and bond up the lot making 
money out of known duds that look genuine if opened (difficult with plastic 
encapsulation, without damaging the chip metallisation) I have bought old 
3inch wafer in the past on eBay to use as lecture samples. They had a 
genuine looking device on them but no id.


Alan
G3NYK

- Original Message - 
From: "Alexander Pummer" <alex...@ieee.org>
To: "Discussion of precise time and frequency measurement" 
<time-nuts@febo.com>

Sent: Monday, October 10, 2016 6:28 PM
Subject: Re: [time-nuts] Prologix USB-GPIB Controller


Once upon the time I designed some power-supplies, used parts from a sound 
name US company, they asked for $12.-- each  --it was long time ego -- the 
equipment supposed to built in Asia, the manager -- I was one outside 
consultant -- told me that we can not use that expensive parts, my Chinese 
colleague told, that I should not worry that part will not cost more than 
a dollar, at the end we got the parts for 57 cents in Hong Kong,  the 
manager was on the opinion that the cheap parts are counterfeit, therefore 
we opened  one expensive original and one cheap one; the silicon was 
identical, as the performance toowas it a perfect copy, or one 
original?, who cares it worked like the original, but much cheaper.


73
KL6UHN
Alex

On 10/10/2016 10:13 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:

On 10 October 2016 at 09:35, Charles Steinmetz <csteinm...@yandex.com>
wrote:


Poul-Henning wrote:

And for voltage references, "pre-owned" is likely to mean "better".
Perhaps, but third-world recyclers are not known for gentle treatment
during the parts removal process.


I had some cheap ($10) GPS receiver boards shipped to me in a plastic
kitchen bag from yikunhk on eBay. 4 boards in the same bag, all 
scratching

each other. The bag was not anti-static.

There are all number of possible explanations of why boards can be made 
so

cheaply, when the ICs appear to cost more than the boards.

* The chips are counterfeit
* The chips are similar to what they are supposed to be, but have been
relabeled.
* They are made at the same factory as the real devices, on what I've 
heard
described as the "ghost shift", where they are not officially made, but 
are

the same devices.
* They are recycled.
* They are stolen.

It is anyone's guess once you start buying semiconductor devices from 
eBay.

Maybe you are lucky, maybe you are not.

You dramatically increase the probability a part is good if sourced from 
a

reputable source (e.g. RS or Farnell in the UK). That is not to say that
the parts are not counterfeits, as even the best suppliers can get 
caught,

but they are more likely to be ok.

I recently bought a supposedly original Samsung battery for my Samsung
Galazy S3 phone from a local shop. The phone had all sorts of issues with
this battery, so I concluded it was a poor counterfeit.  I thought I'd be
safe buying directory from Amazon (not a 3rd party), but on reading 
reviews
on Amazon, I was not convinced those were genuine Samsung batteries 
either,

so I did not buy from Amazon.

Eventually I bought a battery from the Samsung website. The phone now 
works
ok.  I don't know if  Samsung actually make the batteries themselves, but 
I

think I have a better chance of buying from the Samsung website than from
anywhere else.

I've had "Duracell" batteries leak. At one time I used to blame Duracell,
but now it has cross my mind whether they might have been bought on eBay
and were counterfeits. I can't recall where they were purchased, but now 
I

will only purchase batteries from sources I consider reputable.

Dave.
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10/10/16


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Re: [time-nuts] Prologix USB-GPIB Controller

[Bob Camp]

Hi

Like it or not, these days the volume purchases of IC’s are made in China. 
Volume buys
have *always* been lower cost than normal distribution pricing. A > 10:1 ratio 
is not at
all out of the question. If I bought 10,000,000 of a chip each month, I’d 
expect (and probably
get)  a very good deal on that chip. I probably have a number of friends who 
would love
to get chips at (or near) the 10M / mo price. Welcome to “Lets Make a Deal”. 
You now
have parts leaking into a grey market. No certs, no ability to trace them back 
(I don’t want
to get in trouble for “sharing”). 

That’s the “bright side” of gray market parts. The “dark side” is that a *lot* 
of chips are fabricated
and / or packaged in China by independent outfits. A wafer or ten goes astray, 
it gets packaged 
and off the result goes to the grey market. No testing, no QA, no trace back. 
Darker still are
pulls or clones. Its always a gamble ….

Bobn



> On Oct 10, 2016, at 1:28 PM, Alexander Pummer  wrote:
> 
> Once upon the time I designed some power-supplies, used parts from a sound 
> name US company, they asked for $12.-- each  --it was long time ego -- the 
> equipment supposed to built in Asia, the manager -- I was one outside 
> consultant -- told me that we can not use that expensive parts, my Chinese 
> colleague told, that I should not worry that part will not cost more than a 
> dollar, at the end we got the parts for 57 cents in Hong Kong,  the manager 
> was on the opinion that the cheap parts are counterfeit, therefore we opened  
> one expensive original and one cheap one; the silicon was identical, as the 
> performance toowas it a perfect copy, or one original?, who cares it 
> worked like the original, but much cheaper.
> 
> 73
> KL6UHN
> Alex
> 
> On 10/10/2016 10:13 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
>> On 10 October 2016 at 09:35, Charles Steinmetz 
>> wrote:
>> 
>>> Poul-Henning wrote:
>>> 
>>> And for voltage references, "pre-owned" is likely to mean "better".
>>> Perhaps, but third-world recyclers are not known for gentle treatment
>>> during the parts removal process.
>> 
>> I had some cheap ($10) GPS receiver boards shipped to me in a plastic
>> kitchen bag from yikunhk on eBay. 4 boards in the same bag, all scratching
>> each other. The bag was not anti-static.
>> 
>> There are all number of possible explanations of why boards can be made so
>> cheaply, when the ICs appear to cost more than the boards.
>> 
>> * The chips are counterfeit
>> * The chips are similar to what they are supposed to be, but have been
>> relabeled.
>> * They are made at the same factory as the real devices, on what I've heard
>> described as the "ghost shift", where they are not officially made, but are
>> the same devices.
>> * They are recycled.
>> * They are stolen.
>> 
>> It is anyone's guess once you start buying semiconductor devices from eBay.
>> Maybe you are lucky, maybe you are not.
>> 
>> You dramatically increase the probability a part is good if sourced from a
>> reputable source (e.g. RS or Farnell in the UK). That is not to say that
>> the parts are not counterfeits, as even the best suppliers can get caught,
>> but they are more likely to be ok.
>> 
>> I recently bought a supposedly original Samsung battery for my Samsung
>> Galazy S3 phone from a local shop. The phone had all sorts of issues with
>> this battery, so I concluded it was a poor counterfeit.  I thought I'd be
>> safe buying directory from Amazon (not a 3rd party), but on reading reviews
>> on Amazon, I was not convinced those were genuine Samsung batteries either,
>> so I did not buy from Amazon.
>> 
>> Eventually I bought a battery from the Samsung website. The phone now works
>> ok.  I don't know if  Samsung actually make the batteries themselves, but I
>> think I have a better chance of buying from the Samsung website than from
>> anywhere else.
>> 
>> I've had "Duracell" batteries leak. At one time I used to blame Duracell,
>> but now it has cross my mind whether they might have been bought on eBay
>> and were counterfeits. I can't recall where they were purchased, but now I
>> will only purchase batteries from sources I consider reputable.
>> 
>> Dave.
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>> 
>> 
>> -
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2016.0.7797 / Virus Database: 4656/13182 - Release Date: 10/10/16
> 
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Re: [time-nuts] Prologix USB-GPIB Controller

[Alexander Pummer]

Once upon the time I designed some power-supplies, used parts from a 
sound name US company, they asked for $12.-- each  --it was long time 
ego -- the equipment supposed to built in Asia, the manager -- I was one 
outside consultant -- told me that we can not use that expensive parts, 
my Chinese colleague told, that I should not worry that part will not 
cost more than a dollar, at the end we got the parts for 57 cents in 
Hong Kong,  the manager was on the opinion that the cheap parts are 
counterfeit, therefore we opened  one expensive original and one cheap 
one; the silicon was identical, as the performance toowas it a 
perfect copy, or one original?, who cares it worked like the original, 
but much cheaper.


73
KL6UHN
Alex

On 10/10/2016 10:13 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:

On 10 October 2016 at 09:35, Charles Steinmetz 
wrote:


Poul-Henning wrote:

And for voltage references, "pre-owned" is likely to mean "better".
Perhaps, but third-world recyclers are not known for gentle treatment
during the parts removal process.


I had some cheap ($10) GPS receiver boards shipped to me in a plastic
kitchen bag from yikunhk on eBay. 4 boards in the same bag, all scratching
each other. The bag was not anti-static.

There are all number of possible explanations of why boards can be made so
cheaply, when the ICs appear to cost more than the boards.

* The chips are counterfeit
* The chips are similar to what they are supposed to be, but have been
relabeled.
* They are made at the same factory as the real devices, on what I've heard
described as the "ghost shift", where they are not officially made, but are
the same devices.
* They are recycled.
* They are stolen.

It is anyone's guess once you start buying semiconductor devices from eBay.
Maybe you are lucky, maybe you are not.

You dramatically increase the probability a part is good if sourced from a
reputable source (e.g. RS or Farnell in the UK). That is not to say that
the parts are not counterfeits, as even the best suppliers can get caught,
but they are more likely to be ok.

I recently bought a supposedly original Samsung battery for my Samsung
Galazy S3 phone from a local shop. The phone had all sorts of issues with
this battery, so I concluded it was a poor counterfeit.  I thought I'd be
safe buying directory from Amazon (not a 3rd party), but on reading reviews
on Amazon, I was not convinced those were genuine Samsung batteries either,
so I did not buy from Amazon.

Eventually I bought a battery from the Samsung website. The phone now works
ok.  I don't know if  Samsung actually make the batteries themselves, but I
think I have a better chance of buying from the Samsung website than from
anywhere else.

I've had "Duracell" batteries leak. At one time I used to blame Duracell,
but now it has cross my mind whether they might have been bought on eBay
and were counterfeits. I can't recall where they were purchased, but now I
will only purchase batteries from sources I consider reputable.

Dave.
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-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7797 / Virus Database: 4656/13182 - Release Date: 10/10/16


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Re: [time-nuts] Prologix USB-GPIB Controller

[Dr. David Kirkby (Kirkby Microwave Ltd)]

On 10 October 2016 at 09:35, Charles Steinmetz 
wrote:

> Poul-Henning wrote:
>
> And for voltage references, "pre-owned" is likely to mean "better".
>>
>
> Perhaps, but third-world recyclers are not known for gentle treatment
> during the parts removal process.


I had some cheap ($10) GPS receiver boards shipped to me in a plastic
kitchen bag from yikunhk on eBay. 4 boards in the same bag, all scratching
each other. The bag was not anti-static.

There are all number of possible explanations of why boards can be made so
cheaply, when the ICs appear to cost more than the boards.

* The chips are counterfeit
* The chips are similar to what they are supposed to be, but have been
relabeled.
* They are made at the same factory as the real devices, on what I've heard
described as the "ghost shift", where they are not officially made, but are
the same devices.
* They are recycled.
* They are stolen.

It is anyone's guess once you start buying semiconductor devices from eBay.
Maybe you are lucky, maybe you are not.

You dramatically increase the probability a part is good if sourced from a
reputable source (e.g. RS or Farnell in the UK). That is not to say that
the parts are not counterfeits, as even the best suppliers can get caught,
but they are more likely to be ok.

I recently bought a supposedly original Samsung battery for my Samsung
Galazy S3 phone from a local shop. The phone had all sorts of issues with
this battery, so I concluded it was a poor counterfeit.  I thought I'd be
safe buying directory from Amazon (not a 3rd party), but on reading reviews
on Amazon, I was not convinced those were genuine Samsung batteries either,
so I did not buy from Amazon.

Eventually I bought a battery from the Samsung website. The phone now works
ok.  I don't know if  Samsung actually make the batteries themselves, but I
think I have a better chance of buying from the Samsung website than from
anywhere else.

I've had "Duracell" batteries leak. At one time I used to blame Duracell,
but now it has cross my mind whether they might have been bought on eBay
and were counterfeits. I can't recall where they were purchased, but now I
will only purchase batteries from sources I consider reputable.

Dave.
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Re: [time-nuts] Prologix USB-GPIB Controller

[Charles Steinmetz]

Poul-Henning wrote:


And for voltage references, "pre-owned" is likely to mean "better".


Perhaps, but third-world recyclers are not known for gentle treatment 
during the parts removal process.  There have been lots of videos and 
descriptions on the web that are truly eye-opening.  The process 
generally involves an intense heat source (everything from gas stove 
burners to campfires) over which children hold PC boards, and when the 
solder is good and flowing (maybe hundreds of degrees above its melting 
point) they give the boards a mighty whack on the edge of a table so the 
parts come flying off.


They are NOT using temperature-controlled vacuum desoldering stations.

I'm not particularly interested in a voltage reference IC that has been 
overheated for a prolonged period, then subjected while hot to a 50G whack.


Best regards,

Charles


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Re: [time-nuts] Prologix USB-GPIB Controller

[Clint Jay]

I think those voltage reference ICs have been done to death over on EEVBlog
and the general consensus is that they work very well, the only counterfeit
part is the 'calibration' sheet that comes with them, they seem to be done
on a photocopier.

They also appear to exceed the accuracy specifications of the part suffix,
my own experience of the three I own is very positive and they've been
checked by a friend who has access to some rather nice HP bench meters.

I would however be very wary of buying surplus OCXOs from eBay, some appear
to have been remove from boards by percussive means (BFO guage hammer) if
some of the pictures are representative of the devices for sale.

On 10 October 2016 at 09:35, Charles Steinmetz 
wrote:

> Poul-Henning wrote:
>
> And for voltage references, "pre-owned" is likely to mean "better".
>>
>
> Perhaps, but third-world recyclers are not known for gentle treatment
> during the parts removal process.  There have been lots of videos and
> descriptions on the web that are truly eye-opening.  The process generally
> involves an intense heat source (everything from gas stove burners to
> campfires) over which children hold PC boards, and when the solder is good
> and flowing (maybe hundreds of degrees above its melting point) they give
> the boards a mighty whack on the edge of a table so the parts come flying
> off.
>
> They are NOT using temperature-controlled vacuum desoldering stations.
>
> I'm not particularly interested in a voltage reference IC that has been
> overheated for a prolonged period, then subjected while hot to a 50G whack.
>
> Best regards,
>
> Charles
>
>
>
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>



-- 
Clint.

*No trees were harmed in the sending of this mail. However, a large number
of electrons were greatly inconvenienced.*
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Re: [time-nuts] Prologix USB-GPIB Controller

[Poul-Henning Kamp]

In message 
, "Dr. David Kirkby (Kirkby Microwave Ltd)" writes:

>When I looked on
>eBay, the board was £2.25 delivered from China. The Analog Devices website
>shows the chip having a budgetary price of $7 in quantities of 1000 or
>more. So if the chips are $7 (£5-£6), how can they make a complete board,
>and pay the postage from China for £2.25? It seems to me highly likely
>those voltage reference chips are counterfeit. If not counterfeit, they are
>hardly legal devices.

You overlook the most likely scenario:  "Pre-owned".

China has _massive_ and very efficient recycling of electronic
components from all the E-Junk we send down there.

And for voltage references, "pre-owned" is likely to mean "better".


-- 
Poul-Henning Kamp   | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer   | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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Re: [time-nuts] Prologix USB-GPIB Controller

[Chuck Harris]

How do you know the product you "paid more money" for is
not a counterfeit?

The best you can do is to go to a source that you trust,
for some reason, and exercise a right of return.

For instance, I have found counterfeit capacitors in
products from HP (in power supplies).  They looked like
Nichicon, but were a slightly wrong color, and had the
name mispelled Nichicom.  And surprise!  They were bad...

I have also found United "Chemicom" caps in one device.

And I have found counterfeit FTDI USB->RS232 devices in
medical instruments...  I only know of them because of
FTDI's momentary spate of anarchist activity where they
had their windows drivers erase the ID from counterfeit
parts... The equipment they were in was scrapped because
the USB ports failed...  A linux utility that I have
showed me why (lsusb).

As to the LTZ1000 type parts.  These references appear in
many, many places you might not expect.  They are in about
all laboratory precision scales, a lot of medical instruments,
like thermometers, driers, and ovens, and the Chinese know
it.

They take pulls from these obscure sources, weld new full
length leads onto the stubs on the original parts, and
sell them as new.  They probably are good enough for 99%
of the applications where they might get used. aged even.

-Chuck Harris

Dr. David Kirkby (Kirkby Microwave Ltd) wrote:

> 
> Like Bob Camp said, it is better to pay more money and get a genuine
> product.
> 
> Dr. David Kirkby Ph.D CEng MIET
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Re: [time-nuts] Prologix USB-GPIB Controller

[Dr. David Kirkby (Kirkby Microwave Ltd)]

On 8 October 2016 at 02:13, Hal Murray  wrote:

> > They get counterfeited a *lot*.
>
> Is that true for relatively obscure things like the Prologix GPIB
> controllers
> that aren't high volume?
>

I would have thought the Prologix GPIB controllers no more obscure than the
NI GBPIB-USB controllers, but the NI ones from China have definitely been
counterfeited. There was a report here, the HP list or similar where the
latest National Instruments software reported the GPIB-USB adapters were
counterfeit! The eBay seller said send it back, and the buyer got a refund.
(Personally I would have not sent it back, and still got a refund.)

There was some even more obscure Analog devices chips that were marked as
something else - see the UK microwave list for the details reported by Andy
Talbot.

There was a design published in the latest RadCom (RSGB publication) of a
voltage reference. The sort of thing volt-nuts would make, although not
such high quality as the LTZ1000 chips. The author said it was cheaper to
buy a complete voltage reference board, than the chip. When I looked on
eBay, the board was £2.25 delivered from China. The Analog Devices website
shows the chip having a budgetary price of $7 in quantities of 1000 or
more. So if the chips are $7 (£5-£6), how can they make a complete board,
and pay the postage from China for £2.25? It seems to me highly likely
those voltage reference chips are counterfeit. If not counterfeit, they are
hardly legal devices.

Like Bob Camp said, it is better to pay more money and get a genuine
product.

Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT,
UK.
Registered in England and Wales, company number 08914892.
http://www.kirkbymicrowave.co.uk/
Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please)
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Re: [time-nuts] Prologix USB-GPIB Controller

[Bob Camp]

Hi

Yes indeed it is true of pretty much ever single GPIB adapter out there. The 
issue is that the innards are not terribly complex and the sell price on eBay
is fairly high compared to the material content. 

Bob

> On Oct 7, 2016, at 9:13 PM, Hal Murray  wrote:
> 
>> They get counterfeited a *lot*.
> 
> Is that true for relatively obscure things like the Prologix GPIB controllers 
> that aren't high volume?
> 
> -- 
> These are my opinions.  I hate spam.
> 
> 
> 
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Re: [time-nuts] Prologix USB-GPIB Controller

[Scott Stobbe]

An example which likely has similar volume to the Prologix is the saleae
logic analyzer, google "saleae clone".

On Fri, Oct 7, 2016 at 9:13 PM, Hal Murray  wrote:

> > They get counterfeited a *lot*.
>
> Is that true for relatively obscure things like the Prologix GPIB
> controllers
> that aren't high volume?
>
> --
> These are my opinions.  I hate spam.
>
>
>
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Re: [time-nuts] Prologix USB-GPIB Controller

[Hal Murray]

> They get counterfeited a *lot*.

Is that true for relatively obscure things like the Prologix GPIB controllers 
that aren't high volume?

-- 
These are my opinions.  I hate spam.



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Re: [time-nuts] Prologix USB-GPIB Controller

[Bob Camp]

Hi

One thing to be *very* careful of on all of these adapters:

They get counterfeited a *lot*. All bets are off when you get one that is not 
the
“real deal”. Far better to source it from a trussed source for a bit more money 
than
to take a risk on a dubious clone. 

Bob

> On Oct 7, 2016, at 7:04 PM, David Gravereaux  wrote:
> 
> On 10/07/2016 12:32 PM, George Dubovsky wrote:
>> I have a real NI GPIB-USB-HS if he'd be interested in that. Prolly cheaper
>> than a new Prologix.
> 
> And supports real SRQ interrupts, too
> 
> 
> -- 
> davyg...@pobox.com:~$ make war
> make: *** No rule to make target `war'.  Stop.
> 
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Re: [time-nuts] Prologix USB-GPIB Controller

[David Gravereaux]

On 10/07/2016 12:32 PM, George Dubovsky wrote:
> I have a real NI GPIB-USB-HS if he'd be interested in that. Prolly cheaper
> than a new Prologix.

And supports real SRQ interrupts, too


-- 
davyg...@pobox.com:~$ make war
make: *** No rule to make target `war'.  Stop.



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Re: [time-nuts] Prologix USB-GPIB Controller

[Dave M]

That's interesting... My memory chips must be experiencing bit failures 
lately.  This isn't the first time it's happened over the past few weeks.

I sit (more comfortable than standing) corrected.

Thanks for the admonition.
Dave M

Bob Camp wrote:

Hi

That’s been my experience as well over the last few decades, based on
using a variety of adapters.

Bob


On Oct 7, 2016, at 5:36 PM, John Miles  wrote:


thanks for the offer, Geo
We've already found a new Prologix unit at much less than retail.
I'm not familiar with the NI units, and have seen postings that
they are tempermental with some instruments.


I've mentioned before that NI adapters are the _least_ temperamental
of all of them.

-- john, KE5FX
Miles Design LLC



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Re: [time-nuts] Prologix USB-GPIB Controller

[Bob Camp]

Hi

That’s been my experience as well over the last few decades, based on using a 
variety
of adapters. 

Bob

> On Oct 7, 2016, at 5:36 PM, John Miles  wrote:
> 
>> thanks for the offer, Geo
>> We've already found a new Prologix unit at much less than retail.  I'm not
>> familiar with the NI units, and have seen postings that they are
>> tempermental with some instruments. 
> 
> I've mentioned before that NI adapters are the _least_ temperamental of all 
> of them.  
> 
> -- john, KE5FX
> Miles Design LLC
> 
> 
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Re: [time-nuts] Prologix USB-GPIB Controller

[John Miles]

> thanks for the offer, Geo
> We've already found a new Prologix unit at much less than retail.  I'm not
> familiar with the NI units, and have seen postings that they are
> tempermental with some instruments. 

I've mentioned before that NI adapters are the _least_ temperamental of all of 
them.  

-- john, KE5FX
Miles Design LLC


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Re: [time-nuts] Prologix USB-GPIB Controller

[Dave M]

thanks for the offer, Geo
We've already found a new Prologix unit at much less than retail.  I'm not 
familiar with the NI units, and have seen postings that they are 
tempermental with some instruments.  I know the Prologix units work with the 
friend's equipment; that's why we specifically went shopping for a Prologix.


Dave M

George Dubovsky wrote:

I have a real NI GPIB-USB-HS if he'd be interested in that. Prolly
cheaper than a new Prologix.

geo

On Fri, Oct 7, 2016 at 3:15 PM, Dave M 
wrote:


Does anyone happen to have a Prologix USB-GPIB Controller available
for sale?  One of my friends needs one for his bench.  He is retired
and on a limited budget, and would like to find one cheaper than
MSRP from Prologix.

Dave M


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Re: [time-nuts] Prologix USB-GPIB Controller

[George Dubovsky]

I have a real NI GPIB-USB-HS if he'd be interested in that. Prolly cheaper
than a new Prologix.

geo

On Fri, Oct 7, 2016 at 3:15 PM, Dave M  wrote:

> Does anyone happen to have a Prologix USB-GPIB Controller available for
> sale?  One of my friends needs one for his bench.  He is retired and on a
> limited budget, and would like to find one cheaper than MSRP from Prologix.
>
> Dave M
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[time-nuts] Prologix USB-GPIB Controller

[Dave M]

Does anyone happen to have a Prologix USB-GPIB Controller available for 
sale?  One of my friends needs one for his bench.  He is retired and on a 
limited budget, and would like to find one cheaper than MSRP from Prologix.

Dave M 
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