The problem is even suggesting this part is the same much less stealing the same part number. I have no problem using the DEI part today only because there is no other alternative for existing circuits.
How does Xforce show about 8 times as much gain on what I assume is 27 megahertz than they do at DC? 6 at DC and 47 at RF? It's impossible to increase frequency this much and not have gain roll off accordingly. Bipolar transistors such as these experience a reduction in gain as frequency increases. Now lets get rid of more smoke and mirrors. With 4 watts drive you should see about 65 watts output and 13 db gain on one Toshiba. Simple online calculators will convert the wattage increase into db. You simply drive the amplifier within the linear region and measure the drive power versus the output power. That's an entirely different unit of measurement that does not require any top secrete circuit or equipment to determine.Īll that's required to measure the signal gain of the transistor is a properly matched amplifier and decent watt meter. Signal gain at RF is specified in decibels or db. The DC gain figures are the transistors HFE or beta specification. Xforce Gain Testing DEI & Toshiba 2sc2879's - YouTubeĪfter looking at this Xforce advertisement I have a lot of questions about the "unfair advantage" and this gain testing. That is determined entirely on how wide the internal junction is and how many fine gold wires are installed to carry the current. Since both parts are rated for 12 volt operation, the only way to handle similar power is to support the same current. Just rip the cap off of a bad DEI (should be easy to find) and compare the size of the silicon junction inside the transistor to the Toshiba. I would like to see less opinion and more facts. If DEI was close to being honest, they would have ripped off the MRF-492 number for use on this part rather than 2SC2879. Just don't treat us like an idiots and place a Porsche 928 turbo emblem on a Volkswagen bug while assuring us it's the same thing. Having said that, I admit there is no other part being manufactured today that closely resembles the real 2SC2879. It's as good as Bofang placing the Icom name on a $39 HT. It's the breakdown voltage of the internal junctions and the current handling ability that tells me this ain't no 2SC2879. Unless quality control is non existent (probably) I wouldn't expect gain to be the trouble. Like as much as they can get for taking the best bipolar transistor number and deceptively placing it on an entirely different and substandard part. I was actually thinking DEI deserves a lot more bad press.
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