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Mastech Variable Linear Lab Power Supply 30V 5A HY3005D | 
| Brand: Mastech
List Price: $178.00
Buy New: $119.00
You Save: $59.00 (33%)
Rating:  4 reviews
Media: Misc.
Model: HY3005D
Availability: Usually ships in 1-2 business days
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| Features:
| • | Two level of control for both current and voltage outputs: coarse and fine for ease of use | | • | Adjustable outputs: 0-30V and 0-5A | | • | Input voltage: 110V AC and 220V AC switchable | | • | Ripple noise: CV <= 0.5 mV RMS, CC <= 3 mA RMS | | • | Warranty: 1 year |
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| Editorial Reviews:
Product Description
Two level of control for both current and voltage outputs: coarse and fine for ease of use
Adjustable outputs: 0-30V and 0-5A
Input voltage: 110V AC and 220V AC switchable
Line regulation: CV <= 0.01% + 1 mV, CC <= 0.2% + 1 mA
Load Regulation: CV <= 0.01% + 3mV, CC <= 0.2% + 3 mA
Ripple noise: CV <= 0.5 mV RMS, CC <= 3 mA RMS
Protection: constant current and short-circuit protection
LCD reading accuracy: +/-1% for voltage and +/-2% for current
Environment: 0-40C, relative humidity < 90%
Size: 11.5" x 6.5" x 5.5"
Weight: 13 lbs
Warranty: 1 year
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| Customer Reviews:
Buy this one - avoid cheaper switching power supplies September 29, 2007
FFN
5 out of 5 found this review helpful
Works as described. Great price. Be careful to avoid cheaper switching power supplies as they may overheat or burn out electronic devices. This unit is not a switching PS. You can get test leads in a variety of configurations that fit this unit from Radio Shack - inexpensive.
Lab Powe Supply October 18, 2009
C. Dinsmore
Ordered for grandson's college class, it met his expectations. Was received timely and in wonderful condition.
Please don't ban this, gov't!! November 16, 2006
J. A. Harmon
3 out of 23 found this review helpful
This unit is great for manufacturing a strong oxidizing agent used in fireworks called potassium perchlorate. It can also be used for making potassium chlorate, which can be used for both fireworks and high explosives.
Hopefully the government doesn't ban these little units because of their ability to make these substances. It's amazing what this little unit can do when you pass its pretty little current through a super saturated solution of common table salt (its oxidizer city, baby!).
I give this unit five stars because it does exactly what it was advertised to do and I didn't have to do any modifications to this unit to get set up and make these chemicals.
Thank you Mastech!
 OK power supply but controls are twitchy and no voltage sense May 4, 2009
Eric Varsanyi
2 out of 2 found this review helpful
The controls are a bit difficult to adjust finely (despite the 'fine' adjustment pots) and there's some threshold where internally a relay clicks on/off which changes the ranges (adjustment is not smooth).
There is no voltage sense line, the green connector is an additional ground.
If the current draw doesn't vary much regulation works fine and there's not much ripple or other noise on the output.
The built in meters are adequate but low-res enough to want to use a good external meter if you are measuring milliamps or millivolts.
All in all a fairly low end supply but adequate if you understand the limitations. Good value for the price.
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