Author Topic: "Expert" seller sells Current Source Voltage step up converter  (Read 4763 times)

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Offline Excavatoree

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http://www.ebay.com/itm/Keithley-225-Current-Source-100VAC-Bipolar-Voltage-Converter-Step-Up-Transformer-/291415323953?ssPageName=ADME:X:AAQ:US:1123

This seller has no clue what he or she has, but he or she does precisely demonstrate that "a little knowledge" is a dangerous thing.   Obviously, he or she has no understanding of what a current source is and thinks it's some sort of "step up converter" that steps 110v "up to" 100V.

I believe he or she is measuring the compliance voltage (which is set fully clockwise, at around 100v.) and thinks that it's a 100V voltage output because the current dials are set to 99.999.  "Thoroughly tested" my arse.

Someone who knows about current sources won't be fooled, but maybe someone looking for a power supply would be.     At least the  "I don't know what this is but I push buttons and turn knobs and stuff happens" people aren't spreading misinformation or misleading people.

« Last Edit: April 15, 2015, 06:31:34 pm by Excavatoree »
 

Offline dom0

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #1 on: April 15, 2015, 07:10:45 pm »
That's just your average eBay test equipment dealer.
,
 

Online TimFox

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #2 on: April 15, 2015, 08:08:30 pm »
He didn't say "expert", he said "experienced seller".  I know many salesmen who think that knowing anything technical gets in the way of their job.
 

Offline Excavatoree

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #3 on: April 15, 2015, 08:23:18 pm »
Sorry, I was wrong about the word "expert."   Obviously it's not been "thoroughly tested," but I wonder if he would honor the guarantee?   Is is guaranteed to work as a current source, or only guaranteed to do what he shows it doing?  (producing 100v at whatever current is needed by his voltmeter. )
 

Online TimFox

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #4 on: April 15, 2015, 09:20:40 pm »
Without a written guarantee with terms, he probably thinks his photo shows proper operation.  Anything past that he probably considers "calibration" and he did not promise that.  How could anyone who doesn't understand the basic operation of his unit guarantee anything past the existence of output that changes somehow with the knobs?
 

Offline calin

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #5 on: April 16, 2015, 03:54:13 am »
Still better than this pulse generator .. dunno what to say ... sexy ... see for yourself :)


http://www.ebay.com/itm/HEWLETT-PACKARD-HP-8011A-Pulse-Generator-/221670997605?pt=LH_DefaultDomain_0&hash=item339c9efe65



 

Offline babysitter

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #6 on: April 16, 2015, 05:58:04 am »
I would have been more impressed if he used the voltage range to show the voltage drop over the 10M impedance of the voltmeter.

Also, he cleaned the knobs a bit too much... that milky semitransparent plastic should be,well,transparent.
Price would be reasonable for a working unit, I think.
I'm not a feature, I'm a bug! ARC DG3HDA
 

Offline Shock

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #7 on: April 16, 2015, 05:59:03 am »
"GUARANTEED WORKING"

Item not as described, case closed in favor of purchaser, shipping refunded, end of story.
Soldering/Rework: Pace ADS200, Pace MBT350
Multimeters: Fluke 87V, 117, 27/FM       >>> WANTED STUFF <<<
Oszilloskopen: Lecroy 9314, Phillips PM3065, Tektronix 2215a, 314
 

Online TimFox

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #8 on: April 16, 2015, 01:09:37 pm »
Still better than this pulse generator .. dunno what to say ... sexy ... see for yourself :)


http://www.ebay.com/itm/HEWLETT-PACKARD-HP-8011A-Pulse-Generator-/221670997605?pt=LH_DefaultDomain_0&hash=item339c9efe65

According to the listing, her underwear is available separately.  However, the vendor does give the basic specifications of the unit, but no indication about working state.
 

Offline SeanB

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #9 on: April 16, 2015, 05:47:13 pm »
Size medium, wears size 7.5 shoes. From the other pictures I would hazard that he has at least 2 daughters, and a grandchild. hopefully the one daughter he is using as the model is over 18.
 

Offline McBryce

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #10 on: April 16, 2015, 06:59:22 pm »
Still better than this pulse generator .. dunno what to say ... sexy ... see for yourself :)


http://www.ebay.com/itm/HEWLETT-PACKARD-HP-8011A-Pulse-Generator-/221670997605?pt=LH_DefaultDomain_0&hash=item339c9efe65

Well I'm sure it produces a racing pulse for many men just from the picture :)

McBryce.
« Last Edit: April 16, 2015, 07:27:00 pm by McBryce »
 

Offline iampoor

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #11 on: April 16, 2015, 07:12:14 pm »
Now its listed as "for parts or not working"  :-//
 

Offline SeanB

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #12 on: April 16, 2015, 07:20:30 pm »
Doubt you can get much for the parts.........
 

Offline max666

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #13 on: April 16, 2015, 07:48:46 pm »
Still better than this pulse generator .. dunno what to say ... sexy ... see for yourself :)


http://www.ebay.com/itm/HEWLETT-PACKARD-HP-8011A-Pulse-Generator-/221670997605?pt=LH_DefaultDomain_0&hash=item339c9efe65

According to the listing, her underwear is available separately.  However, the vendor does give the basic specifications of the unit, but no indication about working state.
First I thought this was funny, but man did that get creepy quickly
http://stores.ebay.com/cheapandrarethingshardtofind/  :o
 

Offline Dave

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #14 on: April 16, 2015, 08:01:42 pm »
Size medium, wears size 7.5 shoes. From the other pictures I would hazard that he has at least 2 daughters, and a grandchild. hopefully the one daughter he is using as the model is over 18.
"But daaaad, I don't want to take pictures with your bike seats and electronic thingies..."
"No buts! You're lucky I let you wear that bikini!" :-DD
<fellbuendel> it's arduino, you're not supposed to know anything about what you're doing
<fellbuendel> if you knew, you wouldn't be using it
 

Offline iampoor

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Re: "Expert" seller sells Current Source Voltage step up converter
« Reply #15 on: April 16, 2015, 08:29:41 pm »
Size medium, wears size 7.5 shoes. From the other pictures I would hazard that he has at least 2 daughters, and a grandchild. hopefully the one daughter he is using as the model is over 18.
"But daaaad, I don't want to take pictures with your bike seats and electronic thingies..."
"No buts! You're lucky I let you wear that bikini!" :-DD

I learned more about the girl than the actual item in the auction.  :-DD
 


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