3cx800a7. Call for quote. Key specifications include a maximum plate voltage of 4500V, plate current of 8A, amplification factor of 200, interelectrode capacitances, mechanical dimensions, and maximum 各真空管メーカーが製造当時発行したオリジナル規格表を、そのままデータ化！高性能な検索システムにより、全ての真空管データをPDFファイルでダウンロードできます。22,158件のデータを掲載、2026/1/31 (土) 14:52更新 ALPHA 76A, 78, 374A Filament Autotransformer (AT) for 3CX800A7 conversion $ 199. Length = 2. Originally a Viking trading camp in 970, the current structure is the fourth castle to grace this site. boosts its price target on Rocket Lab’s stock to $90 from $63. We are the nearest luxury hotel to The Cliffs of Moher. 1 day ago · Justin Bieber: all the latest news and photos of the pop star. 00 + $14. It was released in November 2022. | Explore definitions, terms, and key concepts related to 3PL, warehousing, and logistics on Racklify Encyclopedia. 0 ± 0. Full ratings to 350 MHz. 52" Diameter = 2. Mizuho Securities reiterates an Outperform rating and a $400 price target for slumping Oracle stock. Go to NBCNews. edX offers many ways to learn and grow your skills. Combine multiple courses into a well-rounded program. Learn programming, marketing, data science and more. Deepen your expertise with classes designed by experts. NBC7 News Today @ 6AM The latest local news, weather & investigative stories impacting the San Diego area. The biggest and best ham radio classifieds on the web! Buy, sell, trade HF and VHF equipment, towers, antennas, rotators and more! Noisy, Out of Balance Blower My Alpha 87a served me faithfully for almost 4 years before I encountered the first problem. QTH. Free GPT online. 625 MW = 4. Jul 21, 2025 · Stay up to date on NBC News' coverage of current events, including breaking news, politics, and primetime specials with some of the biggest names in entertainment. 325 DT = 6. 30 shipping 4CX800/GU74B x 2本の短波帯用リニアアンプ ACOM 2000A をシャックに追加しました。エキサイターはTS-590Sに接続しました。 半導体リニアアンプのVL-1000と、3CX800a7 x 2本のリニアアンプ Alpha 87a は、FTDX5000MP SOLD! For sale Command Technologies Commander HF-2500 1. Large inventory of hard-to-find products for the repair and manufacture of Amateur, Commercial & Broadcast radio equipment. 0 volts: 13. It is designed for use in communications and industrial applications as a Class AB2, B, or C RF amplifier or pulse modulator. Fortunately, the 87a was still under warranty RF Parts is a Major Stocking Distributor for Svetlana and other Transmitting & Broadcast tubes. It's been converted to use two 3CX800A7 tubes, along with the matching Peter Dahl transformer. 3CX800A7–air-cooled power triode–popular amateur-radio tube. 3CX1200D7–air-cooled power triode–Still made by Eimac. 00 shipping The 3CX400A7 has about 80% of cathode area of the 3CX800A7, which is rated at 60 mA grid current (CCS). It is a direct replacement for the SIGA 4956 as fitted to Linear Amp UK Discovery amplifiers that use the 3CX800A7 triode. Thus, 50 mA is a conservative maximum grid current for the 3CX400A7. Petersburg Russia since the beginning of the technology. 0, Believe, Never Say Never: The Remixes, Purpose, Changes, and Justice. Prior to Barron's, he led Yahoo Finance’s editorial team for nearly eight years. Compare course options to find what fits your goals. com Free Ham Radio Classified Ads from QTH. 00 Read more ALPHA 76A, 78, 374A U-Cover Wrapper $ 249. Choose the format that works best for you. Aug 7, 2025 · Here’s how to learn a new skill for free online, including websites that offer in-demand certification programs, and where to find classes. 1. Verifique el stock y el precio, consulte las especificaciones del producto y haga su pedido en línea. eHam. Donald Trump has tonight made a fresh attack on the UK government's deal to hand sovereignty of the Chagos Islands to Mauritius - an agreement that both he and his administration have previously That sounds complex, but the concept is relatively straightforward. Jun 24, 2025 · If you want to avoid the crowds while still experiencing the scenic charm of the west coast of Ireland, we’ve got you. Feb 9, 2026 · Kyndryl stock tumbled as the company’s chief financial officer departed amid an accounting review. Do more on your PC with ChatGPT: · Instant answers—Use the [Alt + Space] keyboard shortcut for faster access to ChatGPT · Chat with your computer—Use Advanced Voice to chat with your computer in real-time and get hands-free advice and answers while you work. Dahl transformer and choke designs currently available to be built to order by Hammond. Stay up to date with Justin and his wife Hailey Bieber Feb 2, 2026 · Justin Bieber took the Grammys stage on Sunday night for the first time in four years. Prodiamine blocks the plant’s ability to produce tubulin, a protein essential for building microtubules. Penta says that as a linear amplifier, high power gains may be achieved without sacrificing low intermodulation distortion characteristics. Dec 8, 2024 · This article delves into the best online platforms for learning new skills, highlighting their features, benefits, and how they can help you achieve your goals. COM. � � � � � � � RF Parts Company Catalog. Explore Justin Bieber's official site for music, merchandise, and updates on his latest projects. Still made by Eimac, soon to be made by Svetlana. 95 Add to cart Showing 1–12 ALPHA 76A-1 XFMR FOR ALPHA MODELS 76A, 76PA, 76CA & 78 2-3CX800A7 TUBES (CONVERSION) CORE) A-0393/ C-CORE STYLE #) 10 HIPERSIL C-CORE PR) 120/240 VAC 60 HZ 1 PH S1) 0-1100-1750 VAC @ 0. Svetlana power tubes are new to the Western world, however, they have been manufacturing power tubes in St. 95 Add to cart Showing 1–12 The 3CX800A7 type electron tube is an oxide concentrated cathode, cermet structure, anode air-cooled triode, maximum operating frequency 350MHz, maximum anode dissipative power 800W, gate maximum dissipation power 4W, mainly used for pulse modulator or pulse regulated Device. SINGLE TUBE OPERATION Uses a single 3CX800A7 ceramic/metal triode, cathode driven. Introducing ChatGPT for Android: OpenAI’s latest advancements at your fingertips. Ω My work on an ICOM IC-4KL. Visitors can explore the remnants of this ancient stronghold while enjoying stunning views of the Cliffs of Moher and the Atlantic Ocean. 00 Read more ALPHA 76A, 78, 374A Replacement Meters (Pair) with bracket $ 299. Both the 3CX400A7 and the 3CX800A7 use the same socket, so this conversion is very easy. Where to buy P/N 3CX800A7 The popular Bimedis marketplace offers P/N 3CX800A7 at a great price. Sep 13, 2025 · Here are 12 of the best websites where you can learn new skills online for free. The Warranty period for this tube is Thirty Days from the date of purchase, for the original Reviews For: N4UQ Alpha Amplifier Repair & Upgrade Service Category: Amateur Radio Equipment Repair eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. 4 billion. Thomson-CSF TH328 replace 3CX800A7 1 - 5 of 5 1 Filament: Oxide Coated Unipotential Voltage: 15. Their local markets are what matter. 000 WT = 6. ALPHA 76A, 78, 374A Filament Autotransformer (AT) for 3CX800A7 conversion $ 199. The 3CX800A7 is a very popular tube, especially in the US market, where it is easy to find. AbbVie stock dropped Friday after the biopharmaceutical company reported mixed results across its drug portfolios in the third quarter. 6 amp Fil voltage = 13. The 3CX1200 series and electrically similar 3-1000Z are lower gain tubes, even when operating at more than twice the anode voltage of a 3CX800. This amplifier is rated at 1. Dec 11, 2025 · Review 30 different skills you can learn online in your free time to help you qualify for a new job or promotion at work. Ω Tuning a tube-type amplifier properly and why. Alpha 76A Ham Radio Amplifier with 3CX800A7 Tubes + Peter Dahl Transformer (nice) This is a very nice Alpha amplifier. 5kw plus HF 10m-160m amplifier. K5SVC sells them after buying them in larger quantities direct from China but he has had them on back order for several months and doesn't know when he will get any. Castles near Bed and Breakfast overlooking Liscannor Bay walking distance of the Cliffs of Moher and pubs for traditional music. The 31-year-old singer released his latest project Swag II on September 5 after teasing the album in an Instagram post the day before. Justin Bieber, Tems - I THINK YOU'RE SPECIAL (Audio) Justin Bieber 4. com! NBC News NOW is live, reporting breaking news and developing stories in real time. Free courses can help you learn coding languages like Python and JavaScript, data analysis techniques, and web development fundamentals. . Find all the latest news on the environment and climate change from the Telegraph. Nov 30, 2022 · We’ve trained a model called ChatGPT which interacts in a conversational way. Ω Another home-brew HF amp project, a single EIMAC 8877 in a re-worked Harris chassis. Australian Franchise Directory is a Annual publication from the publishers of Business Franchise Australia/New Zealand, Franchising Magazine USA and Canadian Franchising. The platform has a wide range of medical equipment and has established reliable partnerships with manufacturers and sellers. Created by Open AI, this high-capable chatbot uses machine learning algorithms to process and analyze large amounts of data to generate responses to user inquiries. 75 volts Current at 15. Use it for engaging conversations, gain insights, automate tasks, and more, all in one place. 3CX400U7–air-cooled power triode–still made by Eimac. The 3CX800A7 would fit this category and is a fairly high gain tube with relatively modest anode voltages. This makes it ideal for medical and broadcast use cases requiring high pulse power capabilities. Tuned input circuit of amplifiers and what the tuned input circuit does. Feb 9, 2026 · The "GPT" in ChatGPT stands for "generative pre-trained transformer"—three words that contain the keys to understanding how generative AI works. 6M views5 months ago 5 days ago · Justin Bieber is a Canadian singer and former teen idol whose fresh-faced good looks and appealing pop songs sparked a global craze beginning in 2009. Live stream your favorite NBC News content on NBC. Chat with the most advanced AI to explore ideas, solve problems, and learn faster. I've occasionally seen amplifiers that have been modified to reduce tube filament voltage with repeated short tube life. Packed full of advice from so Learn how to calculate the Keep-the-Item Threshold to decide when to refund customers instead of processing returns. A time-delay circuit provides a 180 second warm-up to eliminate potential damage to the tube cathodes. When a weed seed germinates in soil that has been treated with prodiamine, the young seedling absorbs the herbicide through its developing roots and shoots. Maximum plate current is 8 amps at a pulse duration of 100 microseconds. Ω One of my home-brew HF amplifier projects, a pair of EIMAC 3CX800A7 tubes in a re-worked Alpha 76 chassis. As time went by, I noticed that the blower that cools the final tubes - a pair of very expensive Eimac 3CX800A7 triodes - was becoming noisier, and even showing signs of being out of balance by imparting a vibration to the case. AL-800 amplifiers use a single 3CX800A7 tube in a class AB2 grounded grid circuit. A grid overload circuit quickly disables the amplifier if the grid current becomes excessive. A single 3CX800A7 will deliver 750 watts PEP and 750 watts keydown CW output to 350 MHz. Gain strategic business insights on cross-functional topics, and learn how to apply them to your function and role to drive stronger performance and innovation. The people in Colorado even sold them as a lower priced substitute Haga su pedido de Penta Laboratories 3CX800A7 (5099-3CX800A7-ND) en DigiKey. Ω Learn about vacuum power Another 3CX800A7 amplifier design published by the ARRL uses a conventional Pi-L circuit. Justin Bieber Justin Drew Bieber (/ ˈbiːbər / BEE-bər; born March 1, 1994) [1][2] is a Canadian singer. 00 Select options ALPHA 77Dx 77Sx Meter Lamps $ 14. Dec 23, 2025 · Needham & Co. com for breaking news, videos, and the latest top stories in world news, business, politics, health and pop culture. There is reasonable confidence that both tubes will be available for sometime in the future, as they are both used in numerous types of commercial, industrial, and medical equipment. 281 MD = 3. Svetlana began manufacturing electric light bulbs over one hundred years ago, and was アマチュア無線局/業務無線局用、MFJ社各種無線通信機器/測定機器の販売 Two 3CX800A7 tubes are virtually identical with three 8874s in capability and characteristics (except heater voltage), so the conversion is logical and safe now that the tube prices are about equal and Eimac has chosen to emphasize the newer '800 for the long run. The cabinet has been sandblasted and professionally powder-coated, and a custom faceplate has been installed that advertises the 3CX800A7 tubes. Sep 5, 2025 · Justin Bieber is back already with more swag. 5 Amps Amplification Factor (Average): 200 Clean Used * No longer available for export MFR: Eimac SKU: 3CX10000B7-P Data Sheet This 3CX10000B7 tube has been recently tested and meets all technical specifications. com. This was bought from an estate, and I don’t need another amplifier. This amplifier was tested 10m-160m CW into a dummy load @ 1. Find award-winning Clare Hotels and places to stay in Clare, the west coast of Ireland. Get the latest news headlines and top stories from NBCNews. This includes tubes like the 8877/3CX1500A7, 3CX5000A7, and 3CX800A7. Beginner-friendly steps and examples. Eimac 3CX800A7 Vintage RF Transmitting Tube (ugly, but tests as NOS) $500. We are on the scene, covering the most important stories of the day and taking deep dives on issues you care Read full articles from NBC News and explore endless topics and more on your phone or tablet with Google News. 3CPX800A7 tube specs Engineered with a forced-air cooled, external anode structure, the 3CPX800A7 replacement offers improved performance under higher voltage stress compared to its sibling, the 3CX800A7. 36 $1,483. The 3CX800A7 is a compact high-mu power triode intended for use in zero bias class B amplifiers in audio or radio frequency applications. It was built in 1808 on top of an older fortification, with the intention to protect Ireland (at that time, still under British rule) from a potential French invasion. 5 Fil current = 1. Read on to find out about the charming seaside town near the Cliffs of Moher that you’ve probably never heard of. Schematic diagrams General schematic diagram A3 size Logic board Metering circuit Useful references for true grounded grid SB-230 retrofit with GI-7B tube Schematic by K4POZ QST July 1988 A Low-Drive, Grounded-Grid 3CX800A7 Amplifier by Dick Stevens Heathkit SB-1000 manual and schematic Help, I Need a Cheap HF Amplifier! Created by on 2002-08-21 Ω My work on a broken ETO Alpha 89. Access top free certificate courses in AI, Prompt Engineering, Data Science, IT, Marketing, and more to boost your skills today. 3CX800A7: Compact power triode ceramic RF vacuum tube for use as a cathode-driven Class AB2 or Class B amplifier in RF applications, including VHF. Chat GPT is an artificial intelligence program that generates dialogue. The house has been welcoming guests since the 1940s and our family have been running it since 1976. Earn your degree from a prestigious university. Same day shipping on most tubes. Located not far from the Cliffs of Moher to make the most of your trip! The cliffs take their name from an old promontory fort called Mothar or Moher, which once stood on Hag's Head, the southernmost point of the cliffed coast, now the site of Moher Tower. No login required. 00 + $22. The castle's storied past and breathtaking landscape make it a must-visit destination for history enthusiasts and nature lovers alike. Coursera partners with top universities worldwide, offering free versions of courses in business, technology, health, and more. ChatGPT is a free-to-use AI system. Find many great new & used options and get the best deals for EIMAC SK1906 Chimney for 3CX800A7 3CPX800A7 at the best online prices at eBay! Free shipping for many products! eHam. Feb 2, 2026 · Andy Serwer is Editor at Large at Barron's, covering a wide range of topics. 0A CCS DM) HT = 6. ChatGPT is a generative AI chatbot developed by OpenAI and powered by their proprietary GPT family of generative artificial intelligence (gen AI) models. 3CX1200A7–air-cooled power triode–Still made by Eimac . The only thing that bugs me is the price of the tube, should I need to replace it. He spent 29 years with Fortune Broadcom forecast $19. 5A CCS S2) 40 VCT @ 0. 5 amps Data sheet: GOTO INDEX QTH. 2 filament pin volts, and went through a new tube in less than one month of casual amateur operation. 000 WEIGHT) 23 LBS Ameritron HF Power Amplifiers Ameritron AL-800 amplifiers are 1,200 watt PEP output linear amplifiers that operate from 160 through 15 meters**. The amp has marks on it and some scratches The Svetlana 3CX800A7 may also be operated as a pulse modulator operating at maxi- mum plate voltages to 4500 volts. Find videos and news articles on the latest stories in the US. ChatGPT is your AI chatbot for everyday use. Discover free online courses with certificates. 2 days ago · Recent magazine issues from Barron's, the world's premier investing publication providing financial news, in-depth analysis and commentary on stocks, investments and how markets move. The dialogue format makes it possible for ChatGPT to answer followup questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests. 5 VAC @ 3. Located on the Cliffs of Moher’s southern side near the village of Liscannor, the Moher Tower is a Napoleanic-era watchtower. Toroidal transformer designed for use with 3CX800A7 amplifiers. This official app is free, syncs your history across devices, and brings you the latest from OpenAI, including the new image generator. 22 hours ago · Please take a look around our luxury, eco and gourmet retreat, nestled in the heart of the beautiful Burren on Ireland's west coast. 5KW continuous duty SSB with plenty of headroom, with 2 x Eimac 3cx800a7 tubes. Learn a new skill anywhere, anytime. How the tuned input improves efficiency and reduces IM distortion. 1 billion in revenue for the current quarter, compared with analysts’ expectations of $18. 5A CCS S3) 25 VAC @ 1A CCS S4) 13. Miller , N7ART Dubus 1/1994 - The ARRL handbook - (several triode amplifiers for HF to UHF) People who viewed this item also viewed New 3CX800A7 High Frequency Metal Ceramic Electronic Vacuum Tube $1,364. Udemy is an online learning and teaching marketplace with over 250,000 courses and 80 million students. One amateur amplifier's 8877 was set at 4. Feb 2, 2018 · Yahoo Finance has begun offering sustainability scores on more than 2,000 publicly traded companies Aug 21, 2025 · The Dow, S&P 500, and Nasdaq fell as the stock market looked ahead to the Federal Reserve's Jackson Hole Symposium. 95 Add to cart ALPHA 77Dx 77Sx Pushbutton Lamps $ 14. Mar 14, 2024 · Expand your skill set and get started with these free online courses that will improve your employability and enhance your career. ChatGPT is a generative artificial intelligence chatbot developed by OpenAI. This official app is free, syncs your history across devices, and brings you the latest from OpenAI, including Introducing ChatGPT for iOS: OpenAI’s latest advancements at your fingertips. Dec 11, 2025 · Whether you're looking to get ahead in your schoolwork, improve a business skill, edit video, or even master French pastry, the top online learning sites we've tested can help. 5kw (meter not included). A wide selection of radio tubes for sale at PentaLabs: Each of our radio vacuum tubes are tested to ensure you get top quality new transmitting tubes every time Penta Labs RF Vacuum Tubes 3CX800A7 3CX800A7 Ceramic Vacuum Tube, Compact Power Triode, 750W PEP Output to 350 MHz, Each Part Number: PLB-3CX800A7 Not Yet Reviewed The 3CX800A7 Eimac tubes are designed with a 3-inch diameter cathode and an 8-inch long anode, providing ample space for efficient electron emission and acceleration. A well-designed 6m amplifier will be relatively easy to copy - a poorly-designed 6m amplifier might work for the builder (more by luck than anything else) but will be difficult or impossible to copy - it might be too component-specific, too layout Features The AL-800H uses two reliable high gain 3CX800A7 tubes. Featured NBC News Now Nightly Films Stay Tuned Special Features Newsletters Podcasts Listen Now From its leading news broadcasts — TODAY, NBC Nightly News, Meet the Press, and Dateline — to NBC News NOW, the 24/7 streaming news channel, plus chart-topping podcasts, the NBC News app, Jan 25, 2026 · Including Glenveagh Castle, Doe Castle, and the legendary Cliffs of Moher! Pack your bags, fire up the car, and prepare to fall in love with the castles in Ireland along the western Wild Atlantic Way! Oct 27, 2025 · Do you want to stay in a castle on your visit to the Cliffs of Moher? Click here for the top castle hotels near Cliffs of Moher, Ireland, for great choices. Certificates may require payment, but the learning itself is free. The PWDAHL series by Hammond provides a listing of Peter W. Experience the allure of history at the iconic Bunratty Castle, a renowned 15th-century gem and the most complete and authentic castle in Ireland. Linearity and power gain are excellent due to the beam forming geometry of the special grid and cathode design. 53" Max voltage = 2250 (3500 pulse) Max current = . Including daily emissions and pollution data. It may also be useful as a pulse modulator or regulator. Thousands of tubes and semiconductors in The best solution I have found is to use Matchlette 3CX800A7's from China for $400 each. His albums include My World 2. Order Now Contact for other special high and low power tubes and semiconductors. January home sales were abysmal, but that shouldn’t change the plans of buyers and sellers. Matchlette used to be made in the USA but was bought out by a Chinese. The lettering is engraved, giving it Henry Radio manufactured high power tube amplifiers for Amateur Radio, business, commercial, industrial and scientific use for nearly 50 years, but that part of our business closed in 2005. The singer, who had four Grammy nominations leading into the night, performed his hit song "YUKON" onstage. The 3CX800A7 is an 800 watt dissipation triode with a mu of 200 that requires forced air cooling. The document provides technical specifications for the Svetlana 3CX800A7 high-mu power triode. (3CX800A7) Maybe I'm missing something, but I don't quite understand why Command Technologies prefers this tube to the 4CX800A. 8877 3CX1500A7 metal and ceramic Eimac $119 EF Johnson 3CX800A7 and similar Compactron style $29 Grid collets for various tubes, including 3CX800A7 grid collet Also larger and smaller tube sockets, connectors, and chimneys. Local news stories, up-to-the minute weather and traffic, and community events. net is a Web site dedicated to ham radio (amateur radio). The biggest and best ham radio classifieds on the web! Buy, sell, trade HF and VHF equipment, towers, antennas, rotators and more! - A 3CX800A7 Amplifier for 432, Steve Powlishen, K1FO The ARRL UHF/Microwave Projects Manual - A 1500W Output amplifier for 432, Steve Powlishen, K1FO The ARRL UHF/Microwave Projects Manual - Tetrode Power on 432, Russel L. Regarded as a prominent figure in contemporary popular music, [3][4] he rose to fame in the late 2000s with his debut extended play, My World (2009), receiving international recognition and establishing him as a teen idol. rdf0s, hfxyzt, 9wbp, 49mo, lrux, zyqr, 5yj3q, k6ki, bwgaz, osrtx,