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Old 15th August 2007, 02:38 AM   #1
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Default Great bench supply for tube work.

I happened across this on Ebay, turns out to be perfect for working on tube and high voltage stuff. These supplies are used in a medical testing procedure. Apparently putting current through a gel causes certain organisms to migrate toward the electrode.
The neat part is the supplies are constant voltage, constant current, or constant wattage. The norm seems to be 0-3000 volts with a max output of 300 watts. There are lots of them on Ebay for under 100 dollars.
I use mine for checking/reforming capacitors also.
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Old 15th August 2007, 04:34 AM   #2
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So where's the URL, baby?

You holding out, you like I come you house an geeve you little tune up?

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Old 15th August 2007, 03:54 PM   #3
kevinkr is offline kevinkr  United States
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I bought an electrophoresis supply made by Isco (model 494) on eBay a few weeks ago for $40 plus $30 for UPS ground from Cal. 0 - 600V @300mA, 0 - 2KV @ 90mA. Constant current, constant voltage or constant power operation.. Works fine, planning on using for GM70/211/845 amplifier project development.

The seller doesn't have any on offer at the moment, but I would just do a search on eBay to see what turns up. I'd search on IBI, ISCO, and electrophoresis.
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Old 16th August 2007, 08:32 PM   #4
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With the USPS dropping ground postage and no courier company doing a replacement, these have just become the preserve of North America only, unfortunately. Ebay for the rest of the world doesn't really have them.

Is anyone aware of a company doing ground shipping at rates comparable to the old USPS ones?
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Old 16th August 2007, 10:34 PM   #5
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Quote:
Originally posted by thevoice
With the USPS dropping ground postage and no courier company doing a replacement, these have just become the preserve of North America only, unfortunately.
I have been wondering how that move by USPS will affect small business in the US. It now means that a lot of customers outside of the US have now been lost because air is just too much money.

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Old 16th August 2007, 11:15 PM   #6
Sheldon is offline Sheldon  United States
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Quote:
Originally posted by kevinkr
I bought an electrophoresis supply made by Isco (model 494) on eBay a few weeks ago for $40 plus $30 for UPS ground from Cal. 0 - 600V @300mA, 0 - 2KV @ 90mA. Constant current, constant voltage or constant power operation.. Works fine, planning on using for GM70/211/845 amplifier project development.

The seller doesn't have any on offer at the moment, but I would just do a search on eBay to see what turns up. I'd search on IBI, ISCO, and electrophoresis.
Other common mnf's were Bio Rad, Hoefer, in the U.S., and Pharmacia and LKB in Europe.
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Old 16th August 2007, 11:44 PM   #7
mach1 is offline mach1  Australia
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Quote:
I have been wondering how that move by USPS will affect small business in the US. It now means that a lot of customers outside of the US have now been lost because air is just too much money.
I never regarded surface mail from the US as a viable option. Delivery times were typically 3 - 6 months, with a high loss rate. The new 20lb flat rate box ($39) is a far better option for the heavy stuff.
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Old 17th August 2007, 12:05 AM   #8
rdf is offline rdf  Canada
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And Titan Helena. They make a nice ~800 volt dual.
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Old 17th August 2007, 01:38 PM   #9
kevinkr is offline kevinkr  United States
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Quote:
Originally posted by mach1


I never regarded surface mail from the US as a viable option. Delivery times were typically 3 - 6 months, with a high loss rate. The new 20lb flat rate box ($39) is a far better option for the heavy stuff.
Yeah, when I was still in business (years ago) I did a lot of international trade and I can't remember one instance of shipping anything by USPS surface mail.

Shipping heavy stuff to Canada and elsewhere I generally used one of the big three. UPS in particular seems very good at handling customs issues.. JAL is good to and from Japan as well, but expensive..
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Old 17th August 2007, 07:02 PM   #10
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UPS in particular seems very good at handling customs issues..
Not if you are a Canadian having to pay their exhorbitant fees. UPS should never be used to send something across the border. And they are quite a bit more expensive than surface post was.

dave
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