Xytronic ITR300 Jameco Valuepro Isolation Power Transformer, 120VAC, 300Va, 3.2" Width, 4.6" Length, 4.2" Height

Your average 70 watt tube amp will draw about 150 watts, so take that into consideration. This transformer will work well for the great majority of projects.Notes -Very slight vibration, and I mean barely able to be felt. This isn't really a concern, especially if you mount it.It does draw under 10 watts with no load. It does sit about 80 degrees farenheit, it is a tiny bit warm so I'd design a switch system to turn it on and off vs unplugging it when not in use.Jameco transformers are well respected, so this design by "Xytronic" is pretty solid. Extremely simple to cut costs, it just works and it reflects the design of early isolation transformers used up to the 90s.

Well, mine arrived with nothing more than very slightly bent mounting flanges, easily straightened.Like many, my application is for use with my Variac and dim-bulb, to mitigate hot chassis testing.The good:• It works as advertised.• No low-voltage continuity between input and output-side, nor with chassis.(Someone else can try hipot testing it)• Output side is fused.• Very easy too disassemble if needed. 4 x Philips & 7mm nuts.Everything inside mine seemed fine. Worth checking upon receipt.• Mounting flanges removable.The notable or perhaps questionable:• Attached 2-conductor ~5ft line cord doesn’t inspire confidence. Conductors seem…thin.Very easy to replace if desired.• Features an output socket capable of accepting either US 2-flat or euro 2-round prong plug,despite being rated for only 120VAC/60HZ input/output.• Output socket is 2-prong and will accept polarized plugs. Line cord is unpolarized. Fine.• Output rated at 2.5A, hence its rated ~300W.• Supplied with a 2.5A 5x20mm glass fast-blow fuse.• My Kill-A-Watt reports it draws 7.5W with no load.• If run above 300W, likely the fuse would blow first. or perhaps the line cord. or perhaps the windings.• Input side is not fused; unhappiness results if either winding should fail shorted...• 2-wire line cord, so chassis is floating ungrounded.50-50 odds of unhappiness if primary side should fail to chassis....• Goes without saying: No UL, ETL or any NRTL certifications. In fact, no “marks” of any kind.Unlikely to pass such if tested, given its construction.So overall, fine for my application above and for use by its intended audience,who understands its limitations and use cautions.Would I leave it permanently plugged in at grandma’s house, even under no load? Probably not.

I was in need of an isolation transformer for my hobby of restoring old, vacuum, tube radios. This one was small and light in weight for use in my workbench. I'm very pleased with my purchase.

This works as an isolation transformer. I am using it on an outside GFCI outlet to drive a fence energizer, which kept tripping the GFCI if something actually touched the fence to induce a ground current. If the fence energizer was properly isolated, this would not be a problem, but this unit did the trick The only caveat is that it runs hot under any load, so it wastes about 20W of additional power - much more than a good toroidal transformer, but then much cheaper. You get what you pay for.

This appears to be a true isolation transformer, as per the description. With a digital multimeter, with the transformer not plugged in, I found NO continuity between the primary winding and the secondary (output) winding, and no continuity between either of those and the metal case.The fact that the plug (that plugs into the wall outlet) is two-prong means that I won't have to hassle with cutting the ground wire of the transformer, because there is no ground wire. ... There are precautions people have to take with a device like this, and there are many videos on youtube concerning isolation transformers. Used properly, an isolation transformer can help protect an oscilloscope from damage.

It ain't pretty, but it does the job.

Good Value for the money. Checked and this is a true isolation transformer. Great for working on antique tube electronics.

These are mandatory for working on equipment with the lid open. Well made, works perfectly.