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United Nuclear has a rating of 3.9 stars from 14 reviews, indicating that most customers are generally satisfied with their purchases. United Nuclear ranks 13th among Science sites.
Unique devices & materials you can buy in this shop! Excellent staff who are experts on this field. PS: Happy B-Day, Bob ;) Best, Andreas A.
This Co must be a scam! Ive received nothing that I ordered. Then they only respond with very vague emails about the invoice still needing to be paid through paypal! WHAT! Idiots! Thats not how paypal works! DON't TRUST ANY OF YOUR INFO TO THEM!
This Co must be a scam! Ive received nothing that I ordered. Then they only respond with very vague emails about the invoice still needing to be paid through paypal! WHAT! Idiots! Thats not how paypal works! DON't TRUST ANY OF YOUR INFO TO THEM!
I ordered a high power laser from this company last month and I still do not have it! The man is rude too. I've sent him two emails asking whats going on with my order and he is as vague as possible. Every time I have asked he just says, "It will be shipped at the end of the week." Well its been a month and still no 300 dollar laser. Now he is completely ignoring my emails. I'm starting to think I have been scammed!
The thing melted itself. It also burned through its hot glue insulation. The real rub is that the internal driver is only rated for 2,000 Volts, assuming this is RMS voltage, its peak would be 2,800 Volts, and after entering the bridge rectifier circuit would be 5,600 volts. SO 6 kV! WHY IS IT RATED FOR 25 kV?!
The capacitors are only rated for 20 kV, and the diodes are only 1/4" long. Given the breakdown of air is generally held to be 20 kV PER INCH (humditity / temp depenedent). The diodes couldn't possibly be rated for even 10 kV! They are standard T70A type diodes.
Would have been nice to get my money back for this POS. They didn't return my email requesting a refund...
It is rated for 25KV because it produces 25KV. Your lack of electronic knowledge is surprising. The internal driver does not go into a rectifier circuit, it clearly goes into a VOLTAGE MULTIPLIER CIRCUIT, producing 25KV. Capacitors have double the voltage rating when they are in series, making them ok for up to 40KV, not 20. Your unit burned out because of the way you grounded/powered it, contrary to the instructions, allowing HV to bleed back into the unit. Your request for a refund was turned down because you were 7 months beyond the warranty - and you were emailed this info.
I love science and this site claims to have all kinds of cool stuff. I ordered two elements (Potassium & Sodium) two months ago. Two weeks after I placed the order, I asked for status and was told "Backordered"... but nothing indicated it on the site. I gave them a month and asked for status, "Still not in"... but yet my credit card was charged the day after I placed the order... Three weeks ago I asked them to cancel it, no response. Two weeks ago I asked them again to cancel it, they said they are working on it. Today (2 months later) still not cancelled, no order received, and funds not returned - I had to file a claim with my credit card company to dispute the charge. Again, cool site - but they failed to deliver.
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United Nuclear: - What's New Radiation and Nuclear Chemistry Tools And Equipment Electronic & Electrical General Science General Interest Neodymium Magnets Gift Certificates Large Uranium Metal Samples Restricted to UPS Only Element Samples High Vol...
It's no scam. You received nothing because you never paid your invoice. As we clearly state, we do not use the paypal checkout system or send invoices from paypal. We use an invoice company who emails you an invoice for your purchase and in the invoice is a link to click on which takes you to paypal - where all the purchase info filled in. We're sorry you couldn't understand our invoice payment procedure.