Finally!
After decades of research, trials, errors, marketing hype and outright advertising lies, I have found the answer to 60-cycle hum. This isolation transformer works perfectly.
As a professional guitarist, I have LONG known the grief and hassle caused by bad wiring in nightclubs, studios and my homes. I have tried EVERY CONCEIVABLE method for reducing hum and noise from my equipment: shielding, "noiseless" pickups, expensive amps, mixers, power-conditioners and egregiously-overpriced cables. NONE of those things worked.
Luckily, My wife is an electronic engineer. She suggested that the little "hum-x" I got from Ebtech was simply too small to do any meaningful isolation. I looked high and low, then found this Trip-Lite brand here on Amazon. The price was right so I ordered it, knowing Amazon's return policy is fair in case it didn't work.
It arrived today. I plugged in it to the wall, then plugged my noisiest, cheapest guitar amp into the back of the transformer.
At first, I though I must have hooked it up wrong, because there was absolutely ZERO hum. I checked the cables. Nope. Everything was right. I plugged in a guitar. Nothing. No noise. No hum.
Then I turned the guitar up full. Still no noise. When I strummed a chord, it startled the daylights out of me. The guitar was up full, the amp was up full. Still ABSOLUTELY ZERO HUM.
I have been searching for an answer to this pernicious ubiquitous problem for over 40 years.
This thing is worth it's weight in gold to me now. I lost two expensive pieces of gear just last month: one Kurzweil keyboard and a Mackie mixer, when the poor wiring in a local nightclub fried them.
This may turn out to be the best insurance policy on delicate equipment I have ever gotten. It certainly is the answer to my 60-cycle hum. The power here in my basement is the absolute worst, so it makes a fabulous proving ground ( get it? proving "ground") for this device.
THANK YOU TRIP-LITE!
If you have ANY sensitive electronic equipment, especially digital audio stuff, INVEST in one of these things.
Unlike all the Monster cable BS, Hum-eliminators, conditioners etc.
THIS THING REALLY WORKS!
Comprados juntos habitualmente
Este producto: Tripp Lite IS250 transformador de aislamiento 250W sobretensión 120V 2 salida 6 pies cable TAA GSA
US$172.66
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US$12.72
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Más información del producto
Key Features
Isolate and Protect Valuable Equipment from Power Problems
Utility power problems like EMI/RFI line noise, surges and background spikes can destroy equipment, damage crucial data and lead to critical system failures. Protect your sensitive devices and prevent power disruption with Tripp Lite's Isolator IS250 Power Conditioner. Featuring an internal isolation transformer with a Faraday Shield, the IS250 completely isolates equipment from line noise that can cause incremental, but devastating, equipment damage. Its 680-joule surge suppression rating protects equipment from surges and spikes caused by utility power disruptions and the operation of nearby equipment on the same circuit. Its six-foot power cord allows for flexibility when installing, while the built-in circuit breaker prevents dangerous circuit overloads. 250 watts of capacity allow for use with a variety of sensitive electronics like point-of-sale equipment, diagnostic testing devices, telecom systems and more.
Completely Isolate and Protect Valuable Equipment for Less
By isolating equipment from unpredictable and disruptive utility power, the IS250 eliminates the need for dedicated circuits or costly upgrades to your site's electrical systems. The internal isolation transformer with Faraday Shield provides 100% isolation from the AC power line for equipment plugged into the IS250 Power Conditioner. The IS250 is perfect for protecting sensitive point-of-sale, telecom and diagnostic equipment that can be affected by EMI/RFI line noise, utility switching transients, background spikes and other unpredictable power conditions.
High-Capacity with Robust Features
The IS250's 250-watt capacity can handle a variety of devices, while features like a 680-joule surge suppression rating, integrated circuit breaker and powerful line noise filtering provide ultimate protection and safety in even the most dangerous conditions. With its continuous transformer filtering and no wearable parts, the IS250 reduces surges in the worst power environments to harmless levels.
A 6-ft. cord allows for flexible installation, while two NEMA 5-15R output receptacles let you plug your standard equipment into the IS250 without any adapters or custom power cords. Operation is easy; simply plug the IS250 into a grounded three-prong utility outlet, plug your equipment into the IS250 and turn the power on. The lighted power switch allows for simple one-touch power control of all connected equipment.
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Needs modification for bench safety
I bought the frequently bought together bundle that includes the receptacle and followed D. Rudesill’s photos to modify the unit. YouTube video by Datzfunk also helped a bunch. The bottom receptacle screw/nut was a pain, but otherwise it was pretty simple… heatshrink the ground wire, remove the receptacle and its ground wire, clip the capacitors off, solder new wires to the capacitors, and wire in the new receptacle with capacitors.Everything works as expected now.The only thing that was an actual problem was that the factory didn’t heatshrink the hot wire correctly and left a bare wire gap. The likelihood of it touching the case was really high, so I used some liquid electrical tape that you can see in the photo.
Opiniones destacadas de los Estados Unidos
Ha surgido un problema al filtrar las opiniones justo en este momento. Vuelva a intentarlo en otro momento.
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Calificado en Estados Unidos el 7 de abril de 2010Estilo: Transformador de aislamientoCompra verificada
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Calificado en Estados Unidos el 6 de marzo de 2020Estilo: Transformador de aislamientoCompra verificada
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Calificado en Estados Unidos el 21 de marzo de 2022Estilo: Transformador de aislamientoCompra verificada
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Calificado en Estados Unidos el 20 de diciembre de 2024Estilo: Transformador de aislamientoCompra verificada
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Calificado en Estados Unidos el 17 de noviembre de 2024Estilo: Transformador de aislamientoCompra verificada
Opiniones más destacadas de otros países
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ThierryCalificado en Canadá el 9 de junio de 2021
True isolated transformer
Estilo: Transformador de aislamientoCompra verificada
I normally don't check the internal wires but some of the reviews suggest that it was not a "true" isolated transformer so the 2 back outlets were still on earth ground. When I received the item, I did open it to do a "ground pin mod" as suggested and see by yourself: It was already done! So I am 100% sure it is truly isolated now and what you should do when you receive this item is just unscrew the 5 screws on each side of the transformer, and check if the green (ground) wire is cut from the housing (where all grounds are connected)True isolated transformerThierry
Calificado en Canadá el 9 de junio de 2021
I will put some electric tape or maybe a wing connector just to make sure the wire doesn't touch the housing though. I wish it was cut further but hey it's done and it works. Thanks!
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Arman PablaCalificado en Canadá el 19 de abril de 2018
Great isolation transformer
Estilo: Transformador de aislamientoCompra verificada -
Brian TozerCalificado en Canadá el 1 de marzo de 2018
Great item.
Estilo: Transformador de aislamientoCompra verificada -
Michael BrownCalificado en Canadá el 5 de agosto de 2019
Perfect
Estilo: Transformador de aislamientoCompra verificada -
FiveEarsCalificado en Canadá el 8 de febrero de 2022
Not an isolated ground or neutral -- but that's easily fixed.
Estilo: Transformador de aislamientoCompra verificada
Like other reviews I found this product (Tripp Lite IS-250) NOT to be an isolation transformer in the electronics repair usage of the term. The ground pin AND the neutral were grounded to the case and plug.Not an isolated ground or neutral -- but that's easily fixed.FiveEars
Calificado en Canadá el 8 de febrero de 2022
I expected that, but decided to convert it. It's an okay price for a decent transformer and case.
As noted by another reviewer, they do not use an isolated ground receptacle either. No worries. You can get one: $16 at Home Depot.
1. opening the case (flip it over on the foam from the box). The chassis is raised from the table top for airflow, so it rests full-time on those 10 tiny screws. Flipping it on its lid helps release the load and keeps it from wanting to drop as you take off the cover.
2. disconnect the ground wire from the case screw. The ground screw was so crappy it snapped off on loosening the nut. I sanded the case around the hole and remounted the ground wire and the Faraday shield ground with a new screw.
3. remove the receptacle. The nuts are fussy and don't rotate freely -- just like the ground screw. Mine didn't break, but they were a PITA. You can then easily remove the wires and caps. Just push a small flat head screwdriver in the rectangular gap behind the leads. Push towards the wires. This will release the spring-loaded contacts. Well, that's the normal way. The receptacle was so crappy that it cracked open just trying to release the wires. Point is: you don't need to cut the wires or caps from the old receptacle.
4. clip and cover the end of the ground wire that branches off the neutral on the plug side of the transformer.
5. install the wires and caps to the new IG receptacle. Mount it to the case. I used new screws there too. Do not ground the receptacle, i.e., the green screw on the receptacle. Snug it up, but do not connect it to ground. You might check: an IG receptacle does not connect the ground pins in the receptacle to the receptacle's own mounting chassis.
6. button up and voila! - an actual isolation transformer.
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