8877 tube schematic for sale. This is from the estate of a late Ham (my father.

8877 tube schematic for sale The Alpha 9500 is an advanced technology, auto tuning, linear amplifier that effortlessly delivers 1500 watts of power with as little as 45 watts of drive. Get the best deals on 833 tube when you shop the largest online selection at eBay. 200 Watts: 26. Find many great new & used options and get the best deals for Eimac 8874 3CX400A7 Ham Radio Broadcast Tube Ecsd3020 at the best online prices at eBay! Free shipping for many products! Power Tube Testing Service for Low Power Eimac Electron Tubes 8877 8874 4CX250B. All amplifiers are designed and hand crafted here in the UK using locally sourced materials wherever possible and come with a 1 year warranty on the Another home-brew HF amp project, a single EIMAC 8877 in a re-worked Harris chassis. 3K Classic X Mark II 60 to 120 watts nominal. New (Other) C $108. 8877 3cpx1500A7 vacuum tube. no pay pal. 0: G16b(4) 28: 3 x GI6b 6m Amplifier by JHØWJF: Power is a guess. I managed to collect all of the parts except the blower. I'm asking $325. 190-195 1500-W-Output Amplifier for 160 Meters (3CX1500A7) (1,450,439 bytes, PDF file) ARRL Handbook 1990, pp. Tube arrived well protected and packaged. 00. but recently. payment by zelle, cash or postal money order. ANew in Original BoxThe Eimac 3CX1500A7/8877 is a rugged ceramic and metal power triode designed for use as a cathode driven Class AB2 or Class B amplifier in audio for sale page. I used my computer to design and print all my schematics, and was able to print out "blow-ups" of individual circuits, that greatly aided in the construction, and helped prevent mistakes. Listed under the Technical Reference/Amplifiers/HF Amplifiers category that is about Amateur linear amplifiers. single, used, genuine Eimac power triode valve/tube, the 3cx1500a7 also known as the "8877". W1XYZ Rating: 2020-11-10; Very Good Amp and super rugged Time Owned: more than 12 months. Buy It Now +$66. Used one Eimac 8877 (3CX1500A7) Grounded Grid Triode Legal Limit 160m – 10m (except 12m) Vacuum Relay T/R 220-250vac Dimensions: 11″h x 19″w x 22″d. 00 out of stock at present 3cpx800 pulls . It includes schematics, the BOM and links to videos. Our carefully designed and individually optimised input matching board ensures low VSWR on all bands from 160 to 10 including WARC. Shop now for fast shipping and easy returns! my 8877 tube type amplifier that I use on 2 meters. High Power tubes. or Best Offer The tube(s) may put out "full power", but if the Ig is anywhere near 60 ma per tube to do it, don't buy them. 2 x art2k0fe amplifier 3cx3000f7 amplifier. What you see you buyUp for Sale 1 PcNOS NIB 3CX1500A7/8877 EIMACThe Photos listed above are of actual Tubes which you are buyingDate Code : 8647MADE IN U. To prevent serious burns, Many home brew amplifiers used these tubes due to their pull-out hamfest availability in the 1970s and 80s. The tube should seat without too much pressure applied. This page covers all things related to my 6SQ7 amp. It was decided to use an 8877 triode tube as the 3rd order IP's are -41db compared to a pair of 3CX800's which are -36db. I purchased the Plate lines and output tuning capacitors as a kit from Work that Matters. I chose the 8877, mainly because of the lower drive and blower requirements (as compared to the GS-35B) and because the 3CX1200A7 is impossible to find at reasonable prices. Page 4: General Information For export only, Model Alpha 77Sx (PA-77Sx): Same as ALPHA 77Dx (PA-77Dx) above except two 8877 tubes permit greater PEP input and output power. It makes full 1 kW power on 160, 80 and 40 meters but draws excessive grid current above 20 meters with max power at about 600-700 watts. 5-30 MHz: Console-HD supply: 3K Classic X A Sweep-Tube Linear Amplifier (four 6KD6) ARRL Handbook 1972, pp. 186-190; A Two-Kilowatt Amplifier Using the Eimac 8877 Triode (one 8877 or 3CX1500) ARRL Handbook 1978, pp. We are offering more retail items. High performance tube: the AL-1500 uses a single rugged 3CX1500A7/8877 tube. 1 the 8877 grid is operated at dc ground. It started out as the Alpha 70V using the 3CV1500A7 vapor cooled tube, with ten air cooled amps (70A) using the 3CX1000A7 tube being built. The design follows the classic W6PO design which is described in the Eimac Notes. blower. Power Tube Testing Service for Low Power Eimac Electron Tubes 8877 8874 4CX250B. At full load of 850 mA, the anode Power is a guess. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 8877 Tubes for sale | eBay amplifier schematic. DUTY CYCLE - - - - - - - - - - - - - - - - Continuous duty at rated output. The RF deck is very similar to the venerable Alpha 87A, which used a pair of 3CX800 triodes instead of the single 8877. Each passing vacuum tube is then tested on a fleet of WT-100A original RCA production testers for plate current, screen current and transconductance (gm). $350. 0 out of 5 stars Penta Labs power tubes are matched within a 5% variation on all parameters. Dentron DTR-2000L Amplifer. 3CX1500A7/8877 1500W triode tubes is used for audio and RF applications. Power Supply Schematic. Dec 17, 2013 · 1117 West High Street Bryan, OH 43506 Tel: 419-913-1821 Office & Shop Hours Monday - Thursday 9:00 AM to 5:00 PM Eastern Time exceptionally low for a tube of this power capac-ity. We have a great online selection at the lowest prices with Fast & Free shipping on many items! The 8877/3CX1500A7 1500W TubeMan. Buy 8877/3CX1500A7 - RICHARDSON ELECTRONICS - Electron Tube. Since I deal in surplus, my stock rotates weekly and if you don't see what you are looking for then please ask via e-mail. I am using the Triode Board built by G3SEK (2023 appears no longer avaialble). Shown in Figs. air variables, tank coils and tube sockets. Sep 26, 2017 · Here is the ultimate 8877 Amplifier Builder's Kit. Recognizing that many typ - ical transceivers run considerably more power, M2 built in a 10 dB attenuator so that the am - plifier will operate at maximum power with about 50 W drive. @4. Penta's commitment to excellence begins with design and follows each product all the way through distribution. “No Tube” amps. and that is OK as it is still being made and supported. Using the Herculean 3CX1500A/8877 ceramic tube with its high power gain, the AL-1500 needs only 65 watts of drive from your exciter to deliver the goods-- transceivers and other I spent a lot of time evaluating the 3CX1200A7, GS-35B, and 8877 tubes to replace the aging 3-1000Z in my BTI amplifier. Free shipping on many items | Browse your favorite brands | affordable prices Henry Radio manufactured high power tube amplifiers for Amateur Radio, 3K Classic – 8877: 1980-1984: 8877/3CX1500A7: 3. Nov 2, 2018 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright The Eimac YU209 tube is designed for use in HF band radio communication units, specifically compatible with the 3CX1500A7 / 8877 model. 5 amp steel core transformer and high capacitance grade filter Find Penta Labs RF Vacuum Tubes and get Free Shipping on Most Orders Over $99 at DX Engineering! Penta Laboratories was founded in 1951 and is a world-class manufacturer and distributor of a wide range of vacuum tubes for a variety of industries. The 4CX250B/M is a ceramic/metal, forced-air cooled external-anode tetrode with a maximum anode dissipation rating of 250 Watts. This page describes the construction of a 1500-watt 2m amplifier using an 8877. 1xblf188xr amplifier. The EIMAC 8877/3CX1500A7 is a rugged ceramic/metal power triode designed for use as a cathode driven Class AB2 or Class B amplifier, in audio or rf applications including the UHF band, or as a cathode driven The Eimac 3CX1500A7/8877 is a rugged ceramic and metal power triode designed for use as a cathode driven Class AB2 or Class B amplifier in audio or RF applications including the VHF band, or as a cathode driven anode modulated Class C RF amplifier. It does save having to add a filament choke like you would on a 3-500Z. Handbooks. The ETO Alpha 77Dx is THE quintessential 8877 amplifier, and is a work of art as well as a GREAT performer. ; Los Angeles, CA, build 1971–1982, 1 pictures, 1 tubes, United States of America , schematics Aug 13, 2008 · u can keep 10kw out their all day long with out stressing and killing the tube, if you want a lot of upward swing then you might want to get an 8877, depending on who builds that box that tube with key 1500, bird watts and swing to 4kw or 5 kw, depending on a few factors, service in the house, a well tuned out radio with a lot of upward swing Home › Electron Tubes & Vacuum Devices › Power Grid Tubes › Triodes › Triode 8877/3CX1500A7 Triode 8877/3CX1500A7 The 3CX1500A7/8877 power triode is designed for use as a cathode-driven Class AB2 or Class B amplifier, in audio or RF applications including the VHF band or as a cathode-driven plate modulator Class C RF amplifier. Search all Ameritron AL-1500NT Linear Amplifiers are AL-1500 Amplifiers that come without a tube, so you can use your own 8877 tube to get maximum legal HF output power and more! You really will need to provide a 3CX1500A/8877 ceramic tube for an AL-1500NT, a. It is a better-tested substitute for the Ameritron 380-0500GT and other 3-500 tubes. Brand New. 5K Classic 60 to 200 watts nominal. will have spare tubes to sell after amplifier is sold. PicClick Insights - Factory New Eimac 3CX1500A7 / 8877 Ham Radio / Broadcast Tube ON SALE PicClick Exclusive Popularity - 58 watchers, 0. I now have a CD-R that all my projects are stored on, and can be used for reference at any single 8877 (3CX1500) ceramic triode tube to deliver 1500 W of continuous (no time limit) RF output from approximately 60 W of drive power. Home; EagleMade Products; Radio Equipment; Amplifier Parts; Search Website. With the two tubes in their sockets, adjust the height of the side panels to make certain the tubes' cooling jackets project above the G-10 plenum top by at least 1/8 of an inch. fax: (650) 592-9988 | email: powergrid@cpii. 10-160m 2 x blf188xr complete amplifier . DRIVE POWER - 3K Classic Mark II 60 to 104) watts nominal. With the 8877 idling at 150 mA, the instant the supply is switched on, the anode voltage is 3400 V. Power is a guess. #8877-Tubes - 8877 tube questions #FOR-SALE - MARK YOUR ITEMS Looking at the photos/schematic it looks like a N/O switch on pins 1/5 of the 5 pin connector EIMAC TUBE YU209 3CX1500A7 / 8877 . Search Text Input. 4. The 4CX250B/M is intended for use in applications where tight control of electrical specifications is required and replaces the 4CX250B in all applications. At Microwave Power Products, our work impacts people’s lives in numerous unseen ways every day. Get the best deals for 8877 Tubes at eBay. Henry had a knack for making running changes so you may find your amp doesn't correspond to the schematic you have in front of you. An 8877 can be specified as an extra cost option if required. Newark Electronics offers fast quotes, same day dispatch, fast delivery, wide inventory, datasheets & technical support. I revised the schematic and began to collect parts for my project. Quick links. 00 plus $15. 99 SALE: $179. Very efficient for an old amp. Plus the 8877 tubes are still being used and made by Eimac and by Chinese manufacturers. A healthy set of 800's in a properly working amp should put out 1500 watts with no more than 60 watts in, at 30-40 ma Ig or less. 8877 cathode warm-up time delay circuit, Harbach step-start, K2AW 14KV@1A diode blocks, 32uf. Regular price $750 00 $750. price is $2000. , Each See More Specifications. 184-186; A Conduction-Cooled Two-Kilowatt Amplifier (two 8873) ARRL Handbook 1978, pp. Cooling« Full-cabinet ducted forced airi ball bearing centrif. 3-500G G $1 60 8877 (3CX1500) E $ 9 95 8877 (3CX1500) G $ 595 3CX1200A7 E $ 895 3CX1200D7 E $ 895 3CX1200Z7 E $ 925 3CX3000A7 E $ 1095 3CX3000A7 G $795 3CX800A7 E $ 545 3CPX800A7 E $ 675 8938 E $165 0 1. songlcd (5,545) 98. For this application, the single 8877 best matched the power supply idle current requirement. It uses the EIMAC 8877 (3CX1500A7) high-mu triode in grounded- grid service. 5K Classic 2 x Eiroar 3CX1200A7. The Alpha 9500 is no ordinary linear amplifier. a. It has been professionally tested and is ready for use in a variety of applications including service in a ham radio linear amplifier. =20 Operation bias for the 8877 is supplied by a 12-volt zener diode in = the=20 cathode lead. 8 sold, 10 available. 1 the 8877 grid is = operated at dc ground. That is not so good on these tubes because the cathode to filament spacing is the closest gap inside the tube. 5 amp steel core transformer and high capacitance grade filter capacitor, also features time 3CX1500A7 / 8877 Ceramic Vacuum Tube, High-Mu Power Triode, 1500W, 250 MHz, Each See More Specifications. 200 Watts Hello All: I have a 2KW+ 6m RF Amplifier using an EIMAC 3CX1500A7/8877 tube & chimney operating in Class AB2GG. Opens in a new window or tab. Click Here! (Will load in separate window - large file) (You may save the schematics to your hard drive for better viewing) The Beginning. Included with this sale is the original Alpha manual, and custom roll-around cabinet with storage and power cord. 30-46 to 30-49 A Legal-Limit Amplifier for 160 through 10 Meters (8877) (3,168,225 bytes, PDF file) THE Quintessential 8877 Amplifier Time Owned: more than 12 months. R. com. 727 lb) Author TUBE COMPLEMENT - 3K Classic Mark II Eimac 3CX120nA7. I have one of the older 4CX1600b versions of this amp, and when I got it, I realized those tubes were scarce, so I picked up two extras. This unit is a used Eimac tube manufactured in the United States, known for its quality and reliability in radio communication applications. Approximately 175 watts drive for maximum output. Panel meters for Ig & Ip. We have been in the valve and tube Business Since 1970's. Tube Eimac 3cpx1500A7/8877 used test full power output Transmit/Receive switching 30 + Amps open frame relay Power-line requirements 220/240 Vac 50/60 HZ 25+ or - Amps at 240 Vac Power Supply Heavy duty 1. 00 limited supply 9500 Tube Operating Bias Adjustment: 9500 Tube Bias Adjust Procedure: Alpha 9500 Remote Software 1. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 8877 Tube for sale | eBay Building your own tube-type HF amplifier, doing it "The Right way". E =Eimac, G = Greenstone Prices subject to change. $450. A Two-Kilowatt Amplifier Using the Eimac 8877 Triode (one 8877 or 3CX1500) (2,080,841 bytes, PDF file) ARRL Handbook 1978, pp. All item are tested and guaranteed , supplied. machine? Thank You, the two tubes and cut two holes in the G-10 material top to fit the anode coolers of both tubes. finally back on this amp after a year of solid state amplifiers. EIMAC TUBES 8877 pulls . (Refer to Fig. 176-178; A 160-Meter Amplifier (two 572-B) ARRL Handbook 1978, pp. 186 sold. In addition to the anode, the cathode insulator and cathode/ heater surfaces may remain hot for an extended time after the tube is shut off . Eimbec 8877 tube Rebuilt approximately 2012 this amplifier has seen less than 10 hours of usage. 0: G16b(3) 29: 2 Meter Power Amplifier: No schematic. High performance tube: the AL-1500 uses a single rugged Plate Voltage (HV), Plate Current (IP), Peak RF Watts 3CX1500A7/8877 tube. 60 delivery. What you see you buyUp for Sale 1 Pc. ). High gain ceramic and metal power triode. the front panel is punched and painted. This is a process of eliminating tubes that test with bad values, rejecting those outside limits of design. The 3500v HVPS has a safety interlock 3 min. tube amps are much more interesting! the meters for the amp. com, or contact: CPI MPP Division, Eimac Operations, 607 Hansen Way, Palo Alto, CA 94303 telephone: 1(800) 414-8823. Shop with confidence. As little as 65 watts of drive power will pr vide 1500 watts of output power. The Alpha 9500 is the culmination of over 40 years of design and engineering. S. This will force the cooling air through the anode cooler of each tube. Explore a wide range of our 8877 Tube selection. The grid ring at the base of the tube provides a low-inductance path between the grid element and the chassis. Super high amount watching. Bandswitch S2 and associated components provide pre-tuned input circuits to optimize performance on each amateur band from through 15*foeters (or other frequency ranges if appropriately Brand new Eimac 8877 tube, built in the USA, new in the wrapper. Schematic only. The biggest and best ham radio classifieds on the web! Buy, sell, trade HF and VHF equipment, towers, antennas, rotators and more! fig 1. For starters all the power for our amplifier is coming from a 120V outlet. 0: 4CX250B(2) 27: 50MHz power amplifier by JH0WJF: Power is a guess. Part Number: PLB-3CX1500A7. NOS NIB 3CX1500A7/8877 EIMACThe Photos listed above are of actual Tubes which you are buyingDate code : 0117MADE IN U. This offers the best possible spectral signal. supply, it seemed that a single 8877 would be the easiest tube to imple-ment. i made these with meter basic. Our highly engineered products are vital to modern-day commercial and military communications systems, aid in the treatment of cancer, assist in diagnosing medical conditions, support and protect members of the armed services, empower scientific discoveries and space exploration Get the best deals for 8877 Tube at eBay. Tube Radio Schematics; Icom YU-158 (YU158) tubes are "SELECT" tubes for medical use 8877 tubes. ANew in Original GVT BoxCUSTOM DUTIES AND TAXES IS THE RESPONSIBILITY OF THE BUYER IN THEIR OWN COUNTRYABOUT USWe specialized in thoroughly The Henry Radio 5K Classic amplifier has continuous coverage from 80 thru 10 meters using a pair of Eimac 3CX1200A7s in grounded grid. freescale design 2 x blf188xr hf amplifier (updated 4-9-18) Amplifier, Linear, Eimac® 3CX1500A/8877 Tube, 2,500+ W Output PEP, 160-15 meters, 240 Vac, 15 A Max. have a henry 3k premier amplifier with a 3cx-1200a7 tube. mrfx1k80h amplifier & schematic. I have an excellent Eimac 3CX1500A7/8877 Triode Tube for sale. 18) The 8877 triode tube (two, parallel-connected, in ALPHA 77S) is connected in grounded-grid for high stability, linearity, and simplicity. Remove the tube form its shipping carton, and insert the tube into the socket making sure that the pins align with the socket contacts. com Hot Surfaces - When the tube is used in air and air cooled, external surfaces of the tube may reach tem-peratures up to 200 degrees C and higher. 3cx1500a7/8877 cpi | 4 c W50,000J For information on this and other CPI products, visit our website at: www. 00 dollars shipping. 3K Classic X Mark II Eimac 3CX124OA7. cir Helmut Subject: [LTspice] Tube 3CX1500A7-8877 or GU 39 What you see you buyUp for Sale 1 Pc. Operation bias for the 8877 is supplied by a 12-volt zener diode in the cathode lead. hf amplifier with auto band switching. While it does have a somewhat fragile grid structure, when properly cared for an 8877 will run 1500 watts all day long without breaking a sweat! Remember that this is a single stage amp that will output legal limit with less than 50 watts of drive! Jul 2, 2018 · Can anyone explain what D14 and D15 are doing in this circuit? I just noticed the schematic for this amplifier has the filament tied directly to RF ground. COM. Plus they are about half the cost of new Eimacs. Get the best deals for 3Cx1500a7 8877 Tube at eBay. 200 Watts: 25. 99 Oct 18, 2011 · Place this file in your schematic folder and add an include-line to your schematic. We have Approximately 3,00,000 Valve and Tubes Stock. The circuit In the amplifier circuit in fig. Blower motor (115 VAC) used in early 9500 amps, also 99, 8100, 78, 76A, 374A QTH. can take picture with my phone if you can receive text picture. 1PCS NEW Peimac 3CX1500A7 / 8877 RF Power Tube electron Tube via DHL or FedEx. . this is pick up only in gridley california which is about 70 miles north of sacramento. cpii. from United States. Find great deals on eBay for Eimac 8877 Tube. This tube came as a spare with an Ameritron AL-1500 amplifier that I also have for sale. ldmos hf amplifiers. Penta Labs matched vacuum tubes go The 3CX1500A7/8877 power triode is designed for use as a cathode-driven Class AB2 or Class B amplifier, in audio or RF applications including the VHF band, or as a cathode-driven plate modulator Class C RF amplifier. Ameritron HF Power Amplifiers AL-1500 8875, 5-500A, Y319, 2-450, 5-500A-NOS, Y394, VA210C, 4-500B, 5-500A-P, 4-500A, 8874 See 3cx400a7, 4PR60B/6338 Tube, 304TL-P, 8561/4CX300Y Tube, eimay/amperex-jan, 4PR1000A-P -PULL OUT, YU209 Transmitting Tube, YU209/3CX1500A7/8877, Eimac (NOS), 8163 Transmitting Tube, Amperex (NOS) 8163/3-400Z, 4PR60B Transmitting Tube, Pulse Rated, 4PR60B/8252, 4X150A-NOS Tube, 4X150A/7034 USA Brand (NOS A Sweep-Tube Linear Amplifier (four 6KD6) ARRL Handbook 1972, pp. com power triode is designed for use as a cathode driven Class AB2 or Class B amplifier, in audio or RF applications including the VHF band or as a cathode driven plate modulator Class C RF amplifier. (PO) and ALC. 5KV filter capacitor, 100K@225W bleeder. Schematic for the grounded-grid two-meter triode = amplifier. New (Other) $75. Also given consideration were 3CX800s. 7%. Buy It Now. Linear Amplifier 4K-ULTRA RF-Ampl. Penta Labs RF Vacuum Tubes 3CX1500A7 PLB-3CX1500A7. Eimac Amateur Service Newsletter AN-42, February 1971, has an excellent design for an 8877 amp on 6M using a Pi-network in which the tube capacitance forms the input capacitor of the Pi-net, and a variable (shorted turn) coil is use as the main TUNE control and 100 pF Pi-net output LOAD capacitor. THIS IS A CONSOLE UNIT. The LDMOSFET device at the heart of the 2M-1K2 needs only a few watts to drive it to maximum output. Learn about vacuum power amplifier tubes. Output power 2500+ watts maximum 3200 watts Driven power 100 watts bird will give you 3000 bird output Tube - Eimac 3cx1500A7/8877 used test full power output Transmit/Receive switching 30 + Amps open frame relay Power-line requirements 200/240 Vac 50/60 HZ 25+ or - Amps at 240 Vac Power Supply Heavy duty 1. Learn about "pulse-rated" tubes, and what the difference is from standard tubes. The AL1500 I got had a few problems. 5 amps in intermittent service. Then the next thing I did was to install the tube socket & the Eimac SK-2210 Teflon Chimney. 8877's can still be found on Ebay at affordable prices. The power supply is capable of 4,000 vdc @ 1. Had as a spare for my Ameritron AL-1500 amp. Very quiet and puts out 1500++ with only 38 watts drive, and, tube doesn’t overheat. fig 1. Ω A quick comment on the 8877 tube. 09. Learn about the dangers of tetrode tubes in a swamped input HF amplifier. Get the best deals for Eimac 8877 at eBay. Commercial or home brew, DX Engineering 8877 Ceramic Power Triodes will re-power your weak or dead 8877 amp! Warranty New Command Technologies 3-500 graphite anode tube, also called 3-500ZG and 3-500C for sale. Shipping damaged the HV filter cap as well, but I was able to repair it without replacement. At full load of 850 mA, the anode 144-MHz 1500W 8877 Power Amp. You've had a chance to review the base project and the schematics, now let's get going. 200 Watts: 30. Not only are the tubes still a available, they’re also very affordable unlike the 8877 that will set you back $2000 YU158/8877/3CX1500A7 Eimac Transmitting Tube (Tested Medical Pullout) YU-158 (YU158) tubes are "SELECT" tubes for medical use 8877 tubes. Amplitrex AT1000 Advance Digital Tube Tester, Hickok 752a tube tester, AVO Type 160. SALE: $159. finally complete! this amplifier project started about 2 years ago. Dented Heat Sink; Tested Pullout * No longer available for export supply, it seemed that a single 8877 would be the easiest tube to imple-ment. During shipping The tube came out of the socket and did some damage to the tank area, (never ship an amp with the tube unrestrained in the socket). Schematic for the grounded-grid two-meter triode amplifier. inc Koren_Tubes. This tube has been tested in that amplifier and it produces full output and I guarantee it, sold as is. Operating at 1500-W output, tube dis- sipation is well within the manufacturer's specification. This New Old Stock (NOS) tube has been recently tested and meets all technical specifications. 190-195 Ameritron s AL-1500 Amplifier with Eimac® 3CX1500A7 Feel the need for maximum legal HF output power? AMERITRON s AL-1500 will give it to you. 2 lb = 1 kg) 48 kg / 105 lb 11. The 8877 will easily deliver 1500-W RF output with the drive levels afforded by most 100-W-class transceivers. 58 through 68, this Thomson CSF 3CX1500A7 (8877) Power Triode; Brand New (not NOS) 12 months / 3000Hr warranty; New stock 8877 valve (3CX1500A7) as fitted to many Amateur and Commercial Linear Amplifiers. The Chinese tubes are as good as the Eimacs I'm told by those who have used them. Tube works OK but is a bit soft above 10 mHz. I think I at one time had 5 different "Classic" schematics, and none matched my RF deck, even though I had the manual which shipped with the amp. com Free Ham Radio Classified Ads from QTH. Find top brands, exclusive offers, and unbeatable prices on eBay. Please see my other upcoming sale for a spare NOS Eimac 8877 tube in its original factory sealed box with a manufacturing date of 7823 (spare tube not included in this sale). 3. SSB/CW switch: the bias voltage is switched to provide the best linearity on SSB or the lowest dissipation on CW operation. 6 oz (105. The grid ring at the base of the tube = provides a low-inductance Aug 14, 2012 · TUBE: The tube socket is located on the left side of the amplifier. k. Tuning a tube-type amplifier properly and why. 2. PRESENTLY IN STOCK. Please follow the instruction insert for proper installation. Dented Heat Sink; Tested Pullout * No longer available for export MFR: Eimac SKU: YU158-DENT-P. I ran filament power only for 24 hours to burn off any internal gas or contaminants. 1 The 8877 tubes are readily available from multiple sources, and replacement cost Driven power 25 watts KEY and Max 240 peak in. Thanks! Billy N6YW Penta Laboratories / Machlett Microwave 3CX1500A7 Ceramic/Metal Vacuum Tube, High-Mu Power Triode. 190-195 Find many great new & used options and get the best deals for Factory Eimac 3CX1500A7 / 8877 Ham Radio / Broadcast Tube ON at the best online prices at eBay! Free delivery for many products! Find great deals on eBay for 8877 Tubes. It was previously used in a scientific application in professional equipment. As many know, indirectly heated cathode tubes like the 3CX/3CPX800, 8877, etc have a fragile grid structure. Feb 15, 2016 · What medical equipment specifically, required the 3CX1500A7/8877 tube(s) to operate, and was the device generating RF in its original application (3CX1500A7) ? Perhaps an early M. We have had good performance from Eimac, and Greenstone tubes. the dentron dtr2000l is an hf amplifier from the 1980 era it uses a single 8877 3cx1500a7 tube to produce about a kilowatt of rf output in this page nr7n includes info on operation restoration and mods . ANew in Original Box The Eimac 3CX1500A7/8877 is a rugged ceramic and metal power triode designed for use as acathode driven Class AB2 YU158/8877/3CX1500A7 Eimac Transmitting Tube (Pull) YU-158 (YU158) tubes are "SELECT" tubes for medical use 8877 tubes. my 3cpx1500a7/8877 amplifier ii. 89. 2 x blf188xr new output circuit . Nice looking and uses low cost tubes. Henry Radio, Inc. The Warranty period for this tube is Ninety Days from the date of purchase, for the original customer only. Pre-Owned · Eimac 5 Pcs New Old Stock Eimac 4CX125C Transmitting RF Tube ON SALE WEB Special. 4 README: A9500_remote_notes: Alpha 9500 Schematics with RF Section (Main Controller Rev A, HVPS Rev A, AC Mains Rev A) 9500_schematics_with_rf_section: Alpha 9500 Main Controller Schematics Rev B: BCX I have a. 2 x mrfx1k80h amplifier. The AL1500 is no Alpha. Those sources have all vanished. Panel meter for Ep. The 3CX3000F7 (up to 30 mHz) is exactly the same electrically as the 3CX3000A7 (up to 110 mHz). We have a great online selection at the lowest prices with Fast & Free shipping on many items! 3CX1500A7 / 8877 Ceramic Vacuum Tube, High-Mu Power Triode, 1500W, 250 MHz, Each. $1,588. [Yeah -- just changed the 5 to a 4]. Previously we were better Known as a Wholesaler. High power gain: the 3CX1500A7/8877 features high power gain. 0 new watchers per day , 1,886 days for sale on eBay. 3CX1500A7/8877 EIMACThe Photos listed above are of actual Tubes which you are buyingMADE IN U. 4: Alpha9500_remote_1_4: Alpha 9500 Remote 1. 95 SALE: $649. I. Data Sheet HERE The rugged 3CX3000F7 has a grid dissipation of 225 watts vs the popular 8877 which only dissipates 25 watts. The 3CX3000A7 requires a tube socket whereas the F7 is bolted to the chassis. Net weight (2. 3CX1500A7 Used Tube. The 3CX1500A7/8877 1500W power triode is designed for use as a cathode driven Class AB2 The other meter reads 1. This is from the estate of a late Ham (my father. Ω. The tube proved to be damaged, the heater filament was open, so I had to install a new tube. 200 Watts This is the project page for our EL34 6SQ7 tube amplifier build. The tube socket has seven contacts which match the seven pins on the 8877/3CX1500 Triode. iqo xnlb bpwqly ciijf fuug valt adijn bhhim brfie flk zxa xdupw zrwq bqwuo qbgy