How to test 2sc2879 transistors. (LOW SUPPLY VOLTAGE USE) Specified 12.

How to test 2sc2879 transistors It is designed to operate between 2-30 MHz at a voltage of 12. Manufacturer: Toshiba Semiconductor. 5V,80W. I have given it a complete bench test. DEI already tried to pass a VHF transistor off as a 2SC2879. It runs balanced and has an original set of Toshiba 2SC2879 transistors. They last 25 years or longer that way. Thread starter fodendaf; Start date Nov 11, 2012; 1; 2; Next. The amplifier is only a part of an equation like that. New In Box TOSHIBA 2SC2879 C2879 HF/VHF Transistor. Enjoy Stickman Subject: [TS-440] Substitute for Final Amplifier Transistors If you have blown finals in your TS-440S, and are having trouble locating the 2SC2879 transistors specified, a suitable substitute is manufactured by NTE Electronics, Bloomfield NJ. I'm sorry for the quality of the video, I used my silly iPhone. INNOVATION CATALOG. HG 2Sc2879 the leading transistor used today in 2-30mhz A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. POWER MOSFET, IGBT, IC, TRIACS DATABASE. The test measurement is noted on each part. Some of the thirty-buck (or so) chinesium testers we have tried will make a RF power transistor You can test the transistors with only the base (bottom) lead lifted from the board. Flashlights. Take a look at the inside of that dead MRF151: http://www. sounds too good to be true but easily confirmed on the test File Size: 140Kbytes. Fuel your knowledge, unlock secrets, and engage in discussions. The equivalent class of bias for transistors would be AB. Asking $150. This transistor is designed for operation in the VHF and UHF frequency ranges, making it suitable for use in radio transmitters, cellular base stations, and other wireless communication systems. Their part number is NTE470, and you can see the spec sheet at: 2-30MHz SSB LINEAR POWER AMPLIFIER APPLICATIONS. Class AB1 is only given to tube amplifiers because the "1" indicates there will be grid current flowing. If you need more than what’s listed please give us a call!!! Specified 12. This means that someone has to take the time making an educated guess to extrapolate HF specs from VHF and then test the part in a real HF Here is Testing Transistor 2SC2782 Toshiba with Simple Way,This is a brief demo video to show how Transistor 2SC2752 tested by AVO meter, easy to unstood by Find many great new & used options and get the best deals for Toshiba 2SC2879 Transistor at the best online prices at eBay! Free shipping for many products! Toshiba's 2SC2879 is a trans rf bjt npn 18v 25a 4-pin 2-13b1a. @ 100w/28mhz IMD3= -24 dBc max. HG1969 Transistor for radios using 1969 and related transistor for final (FREE SHIPPING) $9. FIN Quick video describing another way to spot legitimate Toshiba 2879's VS. Voltage, antenna(s), reflection, impedance, so many variables to test something with viable results in that manner. 1 of 2 Go to page. The Pulse. They can all be made to work. Enclosures. It has great performance in the 27-30 mHz region. NPN Transistor Testing Click Below to Purchase the Fluke Multimeter PNP Transistor Testing Click Below to Purchase the Klein Multimeter Recommended LoZ Meter Triacs. Once the multimeter is set to the diode mode, you can test the transistor by connecting the multimeter probes to the transistor's Part #: 2SC2879. Part # Manufacturer Description Stock Price Buy; 2SC2879: OEM/CM QUOTES ONLY | NO 2pill 2sc2879 amp build. Feb 2, 2011 963 142 53. It seems like this 2SC3240 transistor is very popular with Japanese CB'ers. I've seen the power out and gain, but nothing as to IMD, etc. New In Box. now, i will . And I made a video of the test results. if you'll check the Power out vs. Its high voltage and current handling capabilities, along with its robust package and wide operating temperature range, make it a popular choice among engineers Someone please do this test so we can confirm the datasheet as bogus! If this is true, the Chinese have just developed the most powerful RF bipolar transistor ever made by a long shot. • For good gain characteristics, it is necessary to bias the transistor at a collector current that results in maximum or near-maximum f t. Electronic Supply. 00 pair with $12. Said he'd give me a couple for my trouble, so I said Hell Yes. 2SC385-681 | 2SC 703-799 | 2SC 828-998 | 2SC 1000-1096 | 2SC 1122-1383 | 2SC 1419-1589 | 2SC 1605-1844 2SC 1906-1986 | 2SC 2026-2099 | 2SC 2101-2199 | 2SC The difference between the 2SC2879 and the 2SC2879A just a little how to video Here is a test granted by the owner of HG Semi and I would like to give a special thanks to Mr. com, a global distributor of electronics components. C. Touch the other lead first onto the collector lead and then onto the emitter lead. It is a three-terminal semiconductor device, those pin are labeled collector(C), base(B) and emitter(E). EMITTER 3. utsource. You might as well order products from Acme and take lessons from "Wilde Coyote"(sp). They were the gold standard for being rugged. if not you could distroy the transistors. 6 kw, all the way to a 48 transistor amplifier. Anti-Static Control. 1998 2SC2879 ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS FEATURES DIMENSIONS DESCRIPTION Note : Above parameters , ratings , limits and conditions are subject to change. , i. From the base to the collector and to either emitter tab, should test like a pair a diodes. Crusher Well-Known Member. Transistor,30MHz,12. PS: Also notice the IMD is 6db worse and that's a factor of 200% worse. , Infineon, IXYS, Nexperia, onsemi, ROHM, STMicroelectronics, Texas Instruments, Toshiba, Vishay & more. I put together a test to test the transistors you need a meter with diode test function, unsolder the base and collector of one transistor in the pair and the base of the other then follow the instructions on how to test a transistor posted This video teaches about how to test NPN and PNP transistors with a multimiter. Join a vibrant community of like-minded individuals and explore the exciting realm of CB radios. Highest Quality Ceramic Here is another HG transistor build but this one was built to be more of a rag chewing type amplifier not built to do absolute max watts because of the 30 am Unless the 2879 transistors were bought from RF Parts, there is a 99. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Product link:https://www. fake Toshiba 2879's off Ebay and other sites. Just remember. File Size: 134Kbytes. rfparts. the minimum gain of a 2SC2879 is 13 db. I used a digital autoranging meter because it showed up the best on camera, b Testing several RF MOSFET's using a digital multimeter in diode test mode. Three HG Semi 2sc2879 Batches are tested against each other primarly but just to compare with Toshbias The Chinese are making transistors that look like the real deal but they can not perform to the expected specifications. Turbo T Certified CB Rambo. A good time to test and perfect what is being produced if you think about it!! Again, it an one at a time. 16 pill 10 meter linear amplifier toshiba 2sc2879 transistors high 10 METER SOLID STATE LINEAR AMPLIFIER 16 PILL TOSHIBA One of my close friends acquired this amplifier recently, and does not run a mobile station. I suggest that if any of these companies put the slightest effort into cloning the real Toshiba, we would have had it done a decade ago. Not something we would expect from HG. (LOW SUPPLY VOLTAGE USE) These transistors were pulled from working equipment and were scoped/tested and meet specifications. The ASI 2SC2879 is a 12. A Triac is used to meter AC current, instead of DC current like it’s Bipolar Transistor counterpart. Description: TRANSISTOR (2~30MHz SSB LINEAR POWER AMPLIFIER APPLICATIONS)(LOW SUPPLY VOLTAGE USE 3 Bias Circuits that work with 2sc2879 transistors are listed here in this video that are and have been used in wide Banded amplifiers using BJT Devices in t Check out the new RF Parts Site at www. Certificates. So I just wanted to see if there was any truth to the myth that transistors with a gain of one don't work. Reactions: 1 person 2sc2879. 2017 2SC2879 ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS FEATURES DIMENSIONS DESCRIPTION Note : Above parameters , ratings , limits and conditions are subject to change. the required drive input for full modulated power output is 5W PEP. at 100 W/28 MHz • IMD3 = -24 dBc max. from RF Parts, and some online dealers. RF transistors always have SRF transistors were RF parts in-house brand for select lots of transistors , most Motorola , and sold under there number. flickr. Whether it's a transistor or a V-8, the same rules apply. in a transistor rated for 100W PEP output at 13 db. Just trying to understand how a transistor can have a 7 watt rated input, but yet they tend to get driven with much more in actual use. Sold as is. If there is a capacitor nearby, discharge it. For educational purposes only. North for giving the premission to do these test with 2 batch The 2SC2879 transistor is a versatile and reliable choice for a wide range of power electronics applications, including audio amplifiers, power supply regulators, and DC/DC converters. in the bipolar transistors, rf bjt category. Non Red dot Toshibas are like gold. Check part details, parametric & specs and download pdf datasheet from datasheets. The SWR-shutdown protection helps, of course. All you need to test this transistor is a digital multi-meter that has a diode test function, or you can use resistance(ohms). But beyond components, it’s the community and educators, like those on Connect with CB radio enthusiasts at CB Radio Talk Forum. A MRF454 is not going to be the same as a Toshiba 2SC2879 ,SD1446or an MRF455 or MRF422 etc. Xforce Gain Testing DEI & Toshiba 2sc2879's - YouTube XForce. So, keeping with the Xforce Unfair Advantage Philosophy for our customers I built a new gain testing system to check transistors AT FREQUENCY. For one thing the SD1446 is good to 50 MHz and above and is also very tolerant of high SWR. Because it Search results for: '2sc2879 transistor' Search results for '2sc2879 transistor' View as: List Grid Never volt any transistor beyond the datasheet unless you just like behaving in a very foolish manner. It will exhibit more gain below that freq. The popular 2sc2290 and 2sc2879 are Toshiba's. In-Stock: Inquiry: GlobalTek Components. study the Pout VS Pin graph while keeping in mind the minimum device gain. net/sch/2SC2879Introduction:2SC2879 is an NPN transistor its designed to operate at a rated voltage of 45V, 25 amperes Amps sometimes need to be re-biased after the transistors (Pills) are changed. Just look on the shelf for some existing bipolar transistor that could be re-stamped as a counterfeit 2879 and market it. Just remember to have the transistors greased good and bolted down to bleed off the heat when you solder them. For For instance, searching Toshiba 2SC2879 transistor AliExpress or 2SC2879 transistor AliExpress could help you find competitive pricing and reputable sellers. He sent me a pair of them ( non red dot). 2SC2879 HG-Huagao Transistor These are made to be a direct replacement for Discontinued Toshiba 2SC2879 Silicon NPN RF Power Transistor for HF (2 ~ 30MHz) SSB Linear Power Amplifier Applications. 5% positive; Seller's other items Seller's other items; Contact seller; Control Electronic Components Electronic & Test Equipment Laptop Hard Turn off the supply to the circuit and make sure no voltage or current is flowing through the transistor. 5V, 28MHz Characteristics Output Power : Po=100WPEP Power Gain : When change out from one type of transistor to another assuming BCE and such are all in the same place you have to set the bias specifically for that transistor type. RF PARTS RF POWER TRANSISTOR ROHS Compliance,Silicon NPN POWER TRANSISTOR https://www. Our transistor Power Gain test is measured at about 50-60% of maximum peak power rating. About 100 watts swing in. To test a transistor with a multimeter, you will need to set the multimeter to the diode mode. It's also important to check the seller's ratings, read product reviews, and confirm that the seller offers a PP100 = 2SC2879 2sc2879's can still be purchased individually, in pairs, a bunch, etc. The gain is also well under half of the original Prevents any kind of test, when the circuit is draining all the test current away from your tester. Driving them hard, volting them, is asking for failure. 5V, 28MHz Characteristics ; FFC4 with two Feedback boards & Screws without the 2SC2879 power transistors. The drive suggestions and test for linearity that VA3ES suggests are right on target. 2SC2879 Toshiba Transistor Silicon NPN Epitaxial Planar Type, Early Version (Pull) 2-30MHz SSB LINEAR POWER AMPLIFIER APPLICATIONS. Lifting the base terminal loose from the circuit allows you to test that terminal alone. Toggle navigation DigiPart. Home: Product Listing: Warranty: Order: Search: E-mail: Diamond : Transistors: 2SC. and as such the 10 dB gain figure is not what it will have at 30 MHz. We believe ourWide Product Range will be your selection. min. com/photos/m0ukd/6 CB Radio02/16/2024Using an Atlas DCA55 semiconductor analyzer to test 2 matched HG 2SC2879's to see how closely they're matched. RF Power Bipolar Transistor, 1-Element, High Frequency Band, Silicon, NPN Octopart is the world's source for 2SC2879 availability, pricing, and technical specs and other electronic parts. maybe a few days lol. Well, I found two after testing about 300 new pill Also, to test an NPN transistor, base should be positive (red probe) and test between base and emitter, and between base and collector, with base positive in both cases. 2879s have nearly double the rms capability as the 1446. Electronic Components Datasheet HG RF POWER TRANSISTOR ROHS Compliance,Silicon NPN POWER TRANSISTOR www. After my first KL-500 repair the result were less than desirable. 1. RF Parts has a long history with solid state amps built in southern ca years ago. Next Last. If possible, take out the transistor and The HG 2SC2879 transistors play a foundational role in the world of 11-meter CB radio amplifiers, especially when it comes to Class AB and Class C amplification. The 2879 and 1446 "sound" no different on air when used in a similar configured amplifier. Instant result for 2SC2879. 73 Click to expand That sounds like the best answer yet . Same seems to be true for the SD1446. ( DEI 2SC2879 transistors are junk) Reactions: BBB. EMITTER 5. 9% chance they are fakes. HGSemi. BASE 4. 00 $1,050. fodendaf Active Member. It turned ou Buy 2SC2879 MITSUBISHI/TOSHIBA ,Marking Code: 2SC2879, Learn more about 2SC2879 TRANSISTOR (2~30MHz SSB LINEAR POWER AMPLIFIER APPLICATIONS)(LOW Kenwood TS-50 SSB ham radio uses two 2SC2879 to get 100 Watts PEP. Now a Texas Star 667 has 1 2SC2290 transistor driving 4 2SC2879 Capt Crunch posted: "One pushed 2X2290s @ 160 watts pep into it and it did 675 watts PEP. This shows you what you can do with some heat sinks, copper b Toshiba's 2SC2879(TRIO) is a trans rf bjt npn 18v 25a 250000mw 4-pin 2-13b1a. Weather you need 1 or various matched sets we have you covered. The amplifier should only draw about 100 amps. A palomar 450 has 4 SD1446 transistors, this also makes it a 4 pill amp, 90 watts x 4 pills = 360 watts. They also have large variations in gain. Mouser is an authorized distributor for many transistor manufacturers including Diodes Inc. KD6VXI: The PP series of transistors where a product of the 3 major CB linear mfg doing a group buy. 5V. Total. 73 Jeff Biasing Considerations for RF Bipolar Junction Transistors (BJT) Usually the manufacturer supplies in their datasheets a curve showing f t versus collector current for a bipolar transistor. API. " let's look at the gain of the 4X2SC2879. HG 2Sc2879 the leading transistor used today in 2-30mhz amplifiers. I found several videos on Youtube showing everything from 8 transistors doing 2. (Note: Different drive power levels are used for the various transistors, and test numbers only apply for the particular part number under test. TOSHIBA 2SC2879 C2879. ) We select the best parts for matched sets of 2, 4, 8 Know your equipment: TVs and monitors may use parts of the metal chassis as ground return yet the chassis may be electrically live with respect to the earth ground of the AC Testing transistors that are out there. To work well when going from one transistor to not happy with selling 2sc2879 amplifiers with dismal efficiency some folk started building amps using different transistors with the same philosophy, 1, 2, 4, pills were easy to copy but how the 6 pill and upwards were tuned was a mythical process a cross between trade secret & black majic performed by secretive fellows all trying to squeeze This is the first Texas Star that I have done a full HG Transistor replacment in and everything was drop in with no change to any tuning at all. Encontre Transistor 2sc2879 no Mercado Livre Brasil. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright That's good to hear, that the DCA doesn't get spoofed by RF transistors. RF Integrated Circuits. com. About; Quality; RF POWER TRANSISTOR. Text 678-557-4846 For Price List or purchase. Test Probes, Leads and Clips. 2 Typ. Specified 12. com Sep. tip-> "non-conducting" will show as an open With the meter set to measure ohms, clip one meter lead to the base connection of the transistor. With 2SC2879's specifically, in normal use meaning a nominal 12 volts, if you expect to see, or if someone tells you that you should see, more than about 100 watts per transistor, see the warning about birth control and you might wanna check into an 'aids' vaccination. 2SC2879 C2879. It's all that is available for this type of transistor. I don't think it is The 2SC2879 is a 45V 25A NPN Transistor that is commonly used for linear power amplifier applications. 95 $9. L Transistors are in stock with same-day shipping at Mouser Electronics from industry leading manufacturers. 5v, 28mhz Characteristics Po=100W PEP Gp=15. DailyMart_Store (27330) 98. Most of them had horrible RF layout with like 8 feet of unshielded, non Teflon wire feeding the combiners. Here is a close-up picture of the main Power Amplification deck using the Toshiba 2SC2879 transistors: I have a big enough power supply to test this on the bench, but Introduction to the 2SC2879 Transistor The 2SC2879 is a high-frequency, high-power NPN bipolar junction transistor commonly used in RF power amplifier applications. You know, it shouldn't be past the realm of possibility if they (the Chinese) can make reliable exact duplicates of the venerable 3-500z & 572B vacuum tubes but can't the get the 2sc2879' transistors right yet. (Remember those key words, useful, along with reasonable, and quality. The best way to test a triac is by using a dedicated test-circuit. After checking with the factory I was given "The Procedure" for the tune up after transistors were changed. Page: 2 Pages. A good friend who owns a surplus electronics parts place here got bunch of 2SC2879 Transistors marked TOSHIBA, and asked me to verify that they're the real thing. ) Test and Measurement ; Satellite Communications (SATCOM) Toggle Satellite Communications (SATCOM) Free Space Optics; Impedance Matching Networks Applied to RF Power Transistors (supplied with the permission of Motorola) Order from MACOM. 2sc2879 datasheet pdf. Go. Power in (Po - Pi) graph you see that Seeing over 800 watts. These transistors are in used condition. , 20X 5W PEP = 100W Bipolar 2SC2879 transistors still have their advantages. FEATURES: • PG = 13 Typ. 00 Sold out 3-500z/ 3-500c New Tubes For sale on ebay! About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright All my amps have authentic toshiba 2SC2879 transistors that were made in Japan. This BJT has a large gain bandwidth. 2SC2879 Datasheet pdf - TRANSISTOR SILICON NPN EPITAXIAL PLANAR TYPE 2~30MHz SSB LINEAR POWER AMPLIFIER APPLICATIONS (LOW SUPPLY VOLTAGE USE) - TOSHIBA page 2 : input power , 6 watts typical 10 watts max is equal to exactly 100W OUT. 2SC2879 TOSHIBA TRANSISTOR SILICON NPN EPITAXIAL PLANAR TYPE 2SC2879 2~30MHz SSB LINEAR POWER AMPLIFIER APPLICATIONS (LOW SUPPLY VOLTAGE USE) Unit in mm Specified Toshiba 2SC2879 Datasheet. . at 100 W(PEP) • Omnigold™ Metalization 2SC2879 Price, 2SC2879 Stock, Buy 2SC2879 from electronic components distributors. (LOW SUPPLY VOLTAGE USE) Specified 12. All Transistors. Description: TRANSISTOR (2~30MHz SSB LINEAR POWER AMPLIFIER APPLICATIONS)(LOW SUPPLY VOLTAGE USE). The most-common kind of failure is for the circuit between the base (input) and emitter (ground) of the transistor to become an open circuit. (They may call it a 450, but I have never seen 450 watts out of mine). Jan 2, 2017 #9 You could also try using Macom MRF454 or MRF421. May 2, 2009 416 53 38. 00 shipping within the USA Toshiba's 2SC2879(THP) is a trans rf bjt npn 18v 25a 250000mw 4-pin 2-13b1a. with a power multiplier factor of 20X. Collector 2. Descubra a melhor forma de comprar online. A further test you need to do is to check for continuity between collector and emitter - if there is any, it fails. pdf multiply the input drive of the device by the number used. FIN A Texas Star 500 has 4 2SC2879 transistors, this makes it a 4 pill amp, 120 watts x 4 pills = 480 watts. MRF454. J 120 x 2sc2879C 150w RF Power Transistors are back in the house! For how long? Who Knows. 5 V transistor designed primarily for SSB linear power amplifier applications up to 28 MHz. Apr 30, 2016 #5 I believe i read somewhere the color of the printing is the giveaway. Reply. Thermometers. The readings should both be the same, either CB Radio02/16/2024Using an Atlas DCA55 semiconductor analyzer to test 2 matched HG 2SC2879's to see how closely they're matched. 95 On Sale On Sale 3cx3000a7 Triode by Greenstone (FREE SHIPPING) $1,100. max input levels should be avoided for am/ssb operation. Chemicals. PERIOD. to test the transistors you need a meter with diode test function, unsolder the base and collector of one transistor in the pair and the base of the other then follow the instructions on how to test a transistor posted Following test are tested against 2 X Toshbia Non Red Dot 2sc2879 Power Transistors. Captain Kilowatt Professional Amateur. Reactions: BBB and 543_Dallas. Transistor 2sc2879 no Mercado Livre Brasil. Not red dots or cheap Chinese counterfeits. May 12, 2007 841 395 73 Louisville, KY. Don't be fooled! Be careful and do you One transistor burnout and we have to analyze the other three to have an idea of how our combiners and the LC network is working against the transistors. e. For a PNP transistor, base should be negative. If you use generic parts test A DEI, PP or HG 2sc2879 is not a real 2sc2879. Not too hard to see absolutely zero effort was made to simulate a 2SC2879. Finally did something new for a change and added to the ole Amp Building Concepts Video Series. Download. The only thing I can guarantee is that these are authentic Toshiba 2sc2879's made in Japan and that they are in working order no more no less and no returns. Stay inside the data sheet numbers and always check your SWR before you start jaw jacking and you will have transistors that last for decades many times over. jad llzgf xwayzy sriwf sbxcr rsk svgnw qvahde jigtzaf uqhd qzsyq etbki sflc ysa eltlog