Rf parts 3cx800a7
you can buy now a used. This tube is good, and will not be DOA when you receive it. 8 to 29. Free shipping to the USA only. It is a direct replacement for the Eimac. Got them from RF Parts for less than $1K for a pair. 5kW continuous RF output on all commonly used modes and on any authorized amateur frequency from 1. In the early ARRL Handbooks, you could find their full page product advertisements in the rear of these books. Filament Thoriated Tungsten mesh. Eimac specs say 60 ma per tube absolute max. 50Mhz - 54Mhz, Full Legal Limit, 100% Duty Cycle Read more →. American Radio Supply, LLC is a national supplier of quality radio communication parts and wireless connectivity components including coaxial connectors, cables, antennas. Brand: Henry . Also larger and smaller tube sockets, connectors, and chimneys. 0, 66-lb QSR Industry Leading Solutions Provider. As a linear amplifier, high power gain may be obtained without sacrifice of low intermodulation distortion characteristics. 3CX800A7. Penta Labs was incorporate as a quality RF vacuum tube manufactrure half way through the 20th century in 1951. $449. Plus shipping. Prices subject to change. High-quality, cost-effective, turnkey solutions for industrial RF energy applications will span most ISM bands under 6 GHz with power levels from 10W to 25 kW. Maximum input power of 3 KW (2 KW CCS) requires less than 100 watts of drive power. 3-500ZG, 3-500Z RF Parts Transmitting Tube, One Year Warranty $224. Ended: Looking for a chimney for a 3CX800A7 tubeRF parts wants a fortune for them! Anyone have an extra around to sell me, need just one? Thanks, Ted K8AQM --- This email has been checked for viruses by AVG. RF Parts has the Taylor tube in stock. TUBES - FS: Eimac 3CX800A7's, Matched Pr, NOS For Sale: Eimac 3CX800A7 triode PA amplifier tubes. 1 / VESC-8 / SNELL standards • Light transmission: 80-30% • Usage: Day / Night (sunny up to changeable weather conditions and full dark) • Full activation in 2 minutes (Photochromic performance is influenced by temperature, UV exposure and shield material). They are well known by the Amateur Radio Community and Radio & Television Broadcast Stations. The online parts store is CLOSED. AVAILABLE FOR: X-Fourteen, RF-1400, RF-SR. 0 out of 5 stars based on 1 product rating. E. A RF amplifier that has 2,500 VDC plate voltage will have Peak-to-Peak RF voltages that approach 5,000 V, which is at the limit of what a 3CX800A7 can handle without risking a tube destroying arc across the ceramic grid to anode insulator. MECA Electronics has designed and manufactured an extensive line of RF/microwave components, including fixed attenuators, directional couplers, hybrid couplers, isolators and circulators, power divider and combiners, RF loads, DC blocks, bias tees, cables and adapters. The initial offering includes three unique amplifiers and a signal generator / controller module RF Driver made by MPD. com is a medical and hospital equipment classified advertising site for new and used medical equipment for sale or wanted, we also list refurbished medical equipment. What you guys can recommend me? I was > thinking about two 813 in grounded grid configurations but now I'm > thinking why not the pair of 3-500zg from RF-parts? I newer used 3-> 500zg > before so I can't compare it to 813. Preferred Payments for Domestic and International Purchases: PayPal, VISA, Master Card, American Express, Direct Deposit and Wire Transfer. Discussion in ' Amateur Radio Amplifiers ' started by AF4RK, Sep 8, 2017 . The companion P. EIMAC RF 3CX800A7 Transmitting Broadcast Tube GOOD USA in Made EIMAC 3CX800A7. 100% Customer Satisfaction. I sell tubes, and I have sold many of these Svetlana 3cx800a7 tubes, and (knock on wood) I have NEVER had to replace a single one of them. Rf Triode Tube 7092,Hf Oscillation Lamp Tb5/2500,Vacuum Tube 6t50 , Find Complete Details about Rf Triode Tube 7092,Hf Oscillation Lamp Tb5/2500,Vacuum Tube 6t50,Fu-606 Electron Tube,Oscillation Lamp Tb5/2500,Rf Triode Tube 7092 from Oscillators Supplier or Manufacturer-Dongguan Jingyi High Frequency Machinery Co. 7 MHz. 160M thru 10M, 1500W, 100% duty cycle Read more →. Drive-Thru Headset Repair. Low grid interception and Triode 3CX800A7 is a compact high-mu power triode intended for use in zero bias class B amplifiers in audio or RF applications. Antenna Parts and Accessories. 3 Volts. Available singly, in matched pairs and quartets. 3CX800A7 Cathode Driven RF Linear Amplifier Alpha 9500 Autotune Legal Limit. Electronics High-quality RF and power supply components, accurate peak-detecting directional coupler, front panel adjustable true ALC circuit, automatic bias switching, electronic grid current, and thermal overload protection all combine to make Ameritron AL-800H amplifiers some of the best-featured and most reliable 3CX800A7 amplifiers available. The EN149-2001FFP2 parts manufactured by 3M/ACME FILTER are available for purchase at Jotrin Electronics website. 3 to 1 on all bands. , Ltd on valveindustry. 7 YRS. 333kb. Frequently Asked Questions: IPA Tube- 3CX80A7 #3cx800a7 for the Philips MRI What are your purchasing options for MRI & CT parts? We have several purchasing options: Outright, Exchange, and Repair + Loaner purchasing options are available, submit a quote request for a formal quote! EIMAC RF 3CX800A7 Transmitting Broadcast Tube GOOD USA in Made EIMAC 3CX800A7. Up for your consideration is an EIMAC yc 238 triode pulled from a working alpha 87 amplifier. Frederick Ave. 3CX800A7 pair upgrade installed in your 2-hole 76 : $369. To move the resonance down in frequency to the 16 MHz point, I made a capacitor by adding three turns of #20 Teflon-insulated wire on top of the RF choke winding at/near the top of the RF choke. 8877 (3CX1500A7) $925. Get the high competitive factory price, meet the high quality China Valve Manufacturers like Zhejiang Setec Co. 24/7 Customer Services. Minimum Order: Fifteen ($15. DX Engineering GU74B/4CX800A Ceramic Power Tetrodes are high performance ceramic/metal tetrodes with a plate dissipation rating of 800 watts. ---- Used. Grid collets for various tubes, including 3CX800A7 grid collet. has had an 'hour-meter' added to its front panel, in addition to a pair of Commercial handles & stiffener-gussets, allowing safe shipping W/O removing the transformer & easier EIMAC RF 3CX800A7 Transmitting Broadcast Tube GOOD USA in Made EIMAC 3CX800A7. Consignment and warehousing available. QSK Tubes Dimensions (RF/PS) H”-W”-D” + Wt Current $ New 86 160-15 1500w 1500w-Cont 70w Yes 2 3CX800A7 7. 1 Piece (Min. This unit is compatible with the RF-350K Transceiver and RF-351 Antenna coupler. S. Batteries, Speakers, Mics. which is the smaller brother of TUBE 3CPX1500A7-8877. Can I replace the front panel? Yes, You can. Suite 11-W. 99. SETEC electron tube rf power supply metal ceramic 3cx800a7 CX800A7 foam packing 350mhz. (1) $2,595. com> Sent: Friday, June 14, 2019 7:54 PM Subject: [Amps] 3cx800a7 chimeny Looking for a chimney for a 3CX800A7 tubeRF parts wants a fortune for them! Anyone have an extra around to sell me, need just one? Thanks, Ted K8AQM --- This email has been checked for viruses by AVG. We are not accepting new repairs until we have cleared the backlog of units UNLESS it is a warranty repair. Varian part number 884701-02. 326kb. Freq is 2856 Mhz. Pickup, Service, & Cargo Van - Original Series Parts List. 5-17. These tests can provide valuable information as to the type of degradation to which the particular device under test may be most susceptible, and the severity of the effect on the performance of the device. Eimac 4-1000A / 8166 bundle. 00), all inclusive. . 91 SD1446 Huagao (HG Semi) NPN Class C Epitaxial Silicon Planar Transistor 12. With the user’s concern in mind and incorporating years of innovation, the RF-6000 was developed to provide high sensitivity, stability, speed and reliability. 3CX800A7 MKS RF AMPLIFIER TUBES. 8877 3CX1500A7 metal and ceramic Eimac $119. 1-800-RFPARTS (1-800-737-2787) 1-760 3CX800A7 EIMAC Chimney (SK-1906) & Locking Anode Clamp (SK-1916) Combination (NOS) RF Parts Company 435 S PACIFIC ST SAN MARCOS, CA, 92078, USA. Live Technical Support. Next time it will be a solid state amp for me. Respiratory failure is a condition in which not enough oxygen passes from your lungs into your blood, or when your lungs cannot properly remove carbon dioxide from your blood. Headquartered in Danbury, Connecticut, USA, Amphenol RF has global sales, marketing and manufacturing locations in North America, Asia and Europe. 1 ピース (最小注文) CN Ningbo Setec Eletron Co. My front panel has sticky paint which is dirty and easily scratched and marked. RF Concepts LLC has some panels so you might check with them. Order Now. In RF amplifier service the Peak to Peak RF voltage will approach 2 times the DC plate voltage. 95. 222kb. resonance of the plate RF choke in my MLA-2500B was about 17 MHz. Ending Aug 16 at 7:30PM PDT. 3CX800A7 Eimac 800W Hi Mu Power Triode Tube (NOS) $1,397. High-quality power supply and RF components combine with an accurate peak-detecting directional coupler, front panel adjustable true ALC circuit High-quality RF and power supply components, accurate peak-detecting directional coupler, front panel adjustable true ALC circuit, automatic bias switching, electronic grid current, and thermal overload protection all combine to make Ameritron AL-800H amplifiers some of the best-featured and most reliable 3CX800A7 amplifiers available. Electronics Ameritron AL-800 amplifiers are 1,200 watt PEP output linear amplifiers that operate from 160 through 15 meters**. 276800 433mhz WVS TECH PA TUBE YU-191B SN: UJT0009 DC: 0338. Sorry, we have detected unusual traffic from your network. This RF driver is used in Varian linear accelerators. LOVE IT SO FAR . 91. “Transmitting Broadcast Tube Triode Pulse Rated *TESTED GOOD*”. $31. Used extensively in the Ameritron and similar Linear Amps. 6 YRS. The 3C15000A7 / 3CX15,000A7 Vacuum tube is a high mu triode for use as zero bias class B RF amplifier. $17. Pickup & Service Body - G2 Series Parts List. Price: US $1,500. BOB KK4IBG Amphenol RF is the world’s largest manufacturer of coaxial connectors for use in radio frequency, microwave, and data transmission system applications. The ars web broadcast catalog pages are for radio and television broadcasters world wide that repair and replace vacuum tubes and related parts for broadcast transmitters. 3CX800A7 pair upgrade installed in your Alpha 78: $339. Selling at the RF parts dealers for $2800. The time-delay circuits in this amplifier provide this insurance and also ensure that the tube cooling fan remains running for some time after the amplifier is turned off. $1. 5A, 225 uH, 4 KV max Size: 5 5/8” L x 1” diameter Ceramic coil form Part Number: RFC-3 To: <amps@contesting. This input gives a SWR of less than 1. I just checked with RF parts and they want $899 each or $1800 for a pair. Frequently Asked Questions: IPA Tube (3CX800A7) #452215011442 for the Philips MRI What are your purchasing options for MRI & CT parts? We have several purchasing options: Outright, Exchange, and Repair + Loaner purchasing options are available, submit a quote request for a formal quote! High-quality RF and power supply components, accurate peak-detecting directional coupler, front panel adjustable true ALC circuit, automatic bias switching, electronic grid current, and thermal overload protection all combine to make Ameritron AL-800H amplifiers some of the best-featured and most reliable 3CX800A7 amplifiers available. The is a compact high-mu power triode intended for use in zero bias class B amplifiers in audio or radio frequency applications. The more critical the mission, the more Bird is the critical choice. By the way, the sticky paint WVS TECH PA TUBE YU-191B SN: UJT0009 DC: 0338. 3CX800A7 pair upgrade installed in your 3-hole 76 : $309. American Radio Supply. 3 Eimac 304TL Transmitting Tubes NR Start at $19. Pickup & Service Body - G2 Series - Previous Models (G2-40) 131kb. Then I saw the cost of new EIMAC 3CX800A7tubes which were a bit north of $1,000 each. Vacuum tubes help create a perfect tone. I have other Varian parts, message me and if I have it, I will list it. Let us know if you need any help finding the part/s you need. Today, the typical transceiver output is 100W to 200W. Review (mpn: 3CX800A7 for sale) 3CX800A7 Power Triode Amplifiers Alpha Grid 89 87a Tube EIMAC Ham YC-238. Condition: Used. ARS Electronics Since 1947 - transmitter tube Catalog Page. I was nervous about not using the EIMAC tubes but figured it was worth a chance. Mini-Circuits Launches Power Amplifier Line for RF & Microwave Energy. Ended: Penta Labs Vacuum Tubes. Take the 4CX35,000A which was used in the Harris MW50 transmitters. Alpha PA-87A Ham Radio Amplifier Eimac 3CX800A7 Tubes (works, tubes are soft) Photos not available for this variation. 3CX800A7 pair upgrade installed in your Alpha 374A: $359. you can find the bigger brother on my other listing! for HamRadio/Broadcast. These are NOS tubes purchased as spares for my amplifier and tested but never used. This amplifier uses a ducted forced air cooling system and operates at rated output power with an efficiency of up to 65%. Same-Day Service, 24/7 Support & Nationwide Installation. There are amplifier tubes that can be destroyed by 100W of drive. 1-Source Component. Add to Favorites. M excess inventories, as well as our over $1 billion of available inventory, assist us in getting you the quality ALPHA 76A, 78, 374A Filament Autotransformer (AT) for 3CX800A7 conversion. chimney (3cx800a7 tube) 3 1/2" high app-x216 clapper arm (rf sect) msx-x683 connector voltage tap select jbx-x147 tb1 connector transformer (primary) jfx-x139 j1 connector rf coax (output t/r) jcx-x113 connector rf input/output jcx-x125 cover pin diode board (output t/r module) msx-x681 cover tube deck (bottom chassis) msx-x675 cover (wrapper Ideal for amplifiers using 811A, 572B, 813, 833, 3-500Z, 8877, 3CX800A7, etc. サプライヤーに連絡. Flatbed, Stake, & Van - Tuckunder Series - TKL Parts List. 5V 70W (RFP Logo ) The EIMAC 3CX800A7 is a compact ceramic/metal, air-cooled, high-mu power triode intended for use as a cathode-driven Class AB 2 or Class B amplifier in rf applications including the VHF band. 3-500C $199 each or $395/matched pair. with RF or dc excitation and performed under controlled conditions, are the most common means of failure-mode detection. 00-$1,000. 00/ ピース. 7 MHz - 1500 Watts minimum on all served bands - <-30 dBc Read more →. 3CX800A7 Hi Mu Power Triode The 3CX800A7 is a compact power triode intended for use as a cathode-driven Class AB2 or Class B ampliﬁ er in rf applications including the VHF band. Table 4-1. A single 3CX800A7 will deliver 750 watts PEP and 750 watts The AL-800H uses a pair 3CX800A7 tubes in a class AB2 grounded grid circuit. I just bought 2 for my Alpha 86. $ 109. 0-15. Third 8874 tube addition to the Alpha 374A: $289. 3d 22h. Amp easily does a kilowatt, actually about 1200 watts SSB and 850 watts CW. Flatbed, Stake, & Van - Tuckunder Series - TKT Parts List. The 3CPX if anything would want to load to a higher current in a manual Svetlana offers their own 3cx800a7. Contact for other special high and low power tubes and semiconductors. RF Power Triode (3CPX5000A7, 3CPX1500A7, 3CPX800A7). Item is used and in good working condition. 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. Gaithersburg, MD 20877 eaglemade vacuum tubes capacitors relays chimneys 3cx3000a7 3cx5000 yc-156 yc-179 linear amplifiers cb radio transmitters 3cx10000a7 3cx15000a7 teflon chimneys EagleMade built Amps Eagle made built amps EagleMade built Amps Eagle made built amps EagleMade built Amps Eagle made built amps EagleMade built Amps • Extended Warranty Plans- Annual $799 per machine, includes parts, service, unlimited over the phone (parts>$800 excluded) • Training- On site or At Center-2 days, 4 people • Emergency Repair- within 24-48 hours for critical need for most RF machine brands • Over the Phone Service- with Expert Engineers ALPHA 76A, 78, 374A Filament Autotransformer (AT) for 3CX800A7 conversion. A good example is the 3CX800A7. 3-500ZG/3-500Z RF Parts SELECT Transmit Tubes, Matched Pair, One Year Warranty. I like the amp and have enjoyed using it but without tubes, it's not worth much and pretty useless. If you have a 3CX800 based amp, time to stock up now because RF Parts doesn't always have Eimac 3CX3000A7 3000W High Power Triode Electron Tube. RF Parts Company 435 S PACIFIC ST SAN MARCOS, CA, 92078, USA. so it is the 2500 with different nomenclature , it puts my HL-2200 to shame. These tubes are direct replacements for use in some of the best Peak rf grid voltage 30 35 V Plate dissipation 380 600 W Intermodulation distortion measured by two tone method at 1 MHz: 3rd order -30 dB 5th order -40 dB Typical Operation, Linear with Cathode Resistance Grid Driven Cathode Driven DC plate voltage 2200 2200 2200 2200 V Bias voltage -56 -57 -57 -63 V Zero signal plate current 160 150 100 70 mA Frequently Asked Questions: IPA Tube (3CX800A7) #452215011442 for the Philips MRI What are your purchasing options for MRI & CT parts? We have several purchasing options: Outright, Exchange, and Repair + Loaner purchasing options are available, submit a quote request for a formal quote! RF Power Triode (3CPX5000A7, 3CPX1500A7, 3CPX800A7). , Ltd. As of September 2020 we are open for business on a limited basis. We have so many different parts that we needed a whole separate category for them! You will find radio parts, antenna parts, microphone parts, radar and laser detector parts, and more. While it is sold as a high powered choke, the wire is awfully small. Hi-flow metal 3-500Z $79. As a linear ampliﬁ er, high power gain may be obtained without sacriﬁ ce of low intermodulation distortion characteristics. Mpn: 3cx800a7 Anode Ring 2002a . Bird has been the industry standard in radio frequency product reliability for over 75 years. The price is anywhere from 50 to $100 less per tube than the Eimac's, not a big savings, but it does help some. $249. I prefer about a 2 MHz separation between the resonance and the band edge. A high-low plate voltage switch The RF Connection (301) 840-5477 rfc@therfc. 50 shipping. I called Penta tubes and they will sell me a new pair for $990. Band change and tune-up are microprocessor controlled. RF DECK WITH TUBE INSTALLED Blower on Cabinet Rear New "Plate voltage On" switch added to front panel. TUBE is used came from aa MRI medilcal amplifier. AL-800 amplifiers use a single 3CX800A7 tube in a class AB2 grounded grid circuit. $799. Alpha 8406 – 6 meter. FEATURES: Pinlock • Exceeds Z87. We offer thousands of products and we represent many well known brands. s vast network of reliable contacts, local sourcing, and O. 8-29. Driving a 3CX800A7 with 100W PEP will eventually strip flakes off of the cathode. The flakes lodge between the cathode and the grid cage--creating a fatal short. Condition is Full Output tested in a commander amplifier listed as is for parts due to these tubes being easily damaged if the person does not know what they are doing have questions please ask! Because the 3CX800A7 has an indirectly heated cathode, it must be protected from the application of RF drive before the cathode reaches operating temperature. 5 bids. EIMAC TUBE YU-191A SN: POB0008. , 4-400C Tubes Eimac 4CX1500B Russian GI-7B 813 Eimac 3CX3000A7 Russian coaxial tetrode GS23B EIMAC , 4CX250B Eimac 3CX1200A7 Penta Labs 3CX800A7 Shuguang 6146B EIMAC 4CX350A Jetstream 811A tubes CHINESE 572B TUBES Taylor 3-500ZG Electron triode for pulse modulator 3cx800a7 forced air RF PARTS CX800A7 800w 350mhz. 5 EIMAC RF 3CX800A7 Transmitting Broadcast Tube GOOD USA in Made EIMAC 3CX800A7. Last working, 'it was loafing at full power output on all bands & checked at 2,200 Watts on a dummy load on tube condition of the '2' EIMAC-3CX800A7's. Voltage 6. Spinner knob Gears and cam Coax connectors RFI chokes Capacitors, filter HENRY metal logo HV & Bias diodes Store. The performance characteristics of the 4CX800A allow its use as a high gain grid-driven RF amplifier or as used in grounded grid service. July 19, 2021. 00 New. Capable of full CW break-in (QSK) and all digital modes when used with any appropriate transceiver. Electrical specifications for the 3CX15000A7 / 3CX15,000A7 Vacuum tube. 00 Add to cart. 1 / 6. 95 (5 offers) - Buy Henry 3CX800A7 Vhf Ring Anode Amplifier 2002A . Alpha 8410 – manual tune. What is the reading into a known 50 Ohm RESISTIVE load? Id be concerned about the Alpha itself if it allows such a high current. Learn about causes, risk factors, symptoms, diagnosis, and treatments for respiratory failure, and how to participate in clinical trials. 00 each from EIMAC. On Friday, June 14, 2019 7:54:16 PM EDT Ted Rachwal wrote: > Looking for a chimney for a 3CX800A7 tubeRF parts wants a fortune for > them! Anyone have an extra around to sell me, need just one? Ted, No sense paying exorbitant prices for stuff you can make yourself cheap. We also carry glass chimneys for 3-500 tubes click here. Because the 3CX800A7 has an indirectly heated cathode, it must be protected from the application of RF drive before the cathode reaches operating temperature. Call for stock status! 970 two nine five 4200. 500 watt PEP/250 watt Average output power. It may also be useful as a pulse modulator or regulator. Low grid interception and high Eimac 3CX3000A7 3000W High Power Triode Electron Tube. The transmitter used two of these tubes, one in the RF section and one it the modulator. I have been using my AL-800H for years now. 00 / Piece. I see no meaningful increase over 20-25 ma. They are well matched and have been tested in a legal limit amp with full output and low grid current drain. ) 1-Source has all grades of electrical parts, including mil-spec, industrial grade and commercial grade parts. NOTE: We will take a look inside to make sure there are no obvious issues, like burns, blown caps. The Alpha 87A is capable of 1. $ 500. Please slide to verify help help The 3C15000A7 / 3CX15,000A7 Vacuum tube is a high mu triode for use as zero bias class B RF amplifier. Shop a variety of vacuum tubes: preamp, power amp, rectifier tubes. 3CX800A7 Cathode Driven RF Linear Amplifier Pulse Modulator or Regulator . We also offer a THIS THING IS A BRUT ! easy to load and tune , the one I have is the HF-1250E Export only it has the 2 3CX800A7 tubes and the same transformer and 10 ,12,15,17,20,40,80,160 meters WARC bands. The RF Input comes in on coax that can be seen at the middle bottom. This unit uses a 3CX800A7 power tube as the final output stage. "RF Parts" sells the RFC-3 but it is resonant on 30 meters. 7T69RB Electronic TubeためHigh Frequency Welding Machine Crystal Carton Box Industrial 3. Ended: Aug 12, 2021 , 5:04AM. 572B RF PARTS FU728F TETRODE TUBE RF Concepts 3--500ZG 572B T160L Shuguang TAYLOR 811 RCA 811 Greenstone (USA), Inc. It boasts the highest S/N in its class, a scanning speed of up to 60,000 nm/min, 2,000-hr long-life Xe lamp and an extended range PMT detector to scan the wavelength range up to 900 nm. Order) CN Cixi Anxon Electronic Co. Your RF/Microwave Component Source Since 1961 . High-quality power supply and RF components combine with an accurate peak-detecting directional coupler, front panel adjustable true ALC circuit, electronic grid current and thermal overload protection, and automatic bias Find many great new & used options and get the best deals for 1 piece RF 3CX800A7 Transmitting Broadcast Tube Triode MKS /PHILIPS HAMRADIO at the best online prices at eBay! Free shipping for many products! E*mac 3CX800A7 triode tubes in a grounded grid configuration. Learn More. The criticality and definition of "reliability" can range from accuracy and precision to longevity and clarity. 00. EF Johnson 3CX800A7 and similar Compactron style $29. We appreciate you visiting CB World today! Radar / Laser Accessories. com 213 N. See original listing. . 3CX800A7 Penta Laboratories Compact High-Mu Power Triode. Amp lifier keying box (this will allow any radio to key any amp). $500. DOTmed. EIMAC Triode Tube 3CX800A7. 1. Socket, chimney, anode heat dissipater NOS & tested. Third 8874 tube addition to the Alpha 76 2-tube model $269. I really like it but the cost of a new pair of Eimac 3CX800A7 is nuts. Plus, in the A models there were two 4CX1500A driver tubes. Order by sending an email or call us. Photos not available for this variation. The 3CX800A7 is a compact high-mu power triode intended for use in zero bias class 250 degree centigradeUpdate Date:2011-02-15 02:58:41 triode 3CX800A7 Penta Labs Vacuum Tubes. RFS (Radio Frequency Systems) is a global designer and manufacturer of cable and antenna systems plus active and passive RF conditioning modules, providing complete RF solutions for wireless infrastructure $249. 3CX800A7 (Svetlana 3CX800A7) 572B (572) 8874 (Svetlana 3CX400A7) GM-70 (Ulyanov GM-70, GM70, audio tube) and GMI-42B (high voltage shunt regulator,pulse modulator) Re: [Amps] Alpha 87A Tubes 3CX800A7 and the 3CX P 800A7. Vacuum tubes can be easily damaged if misused, or mishandled. Continuous tuning, fully automatic. 5. 95 to $749. So, I decided to cheap it out and bought the Taylor tubes which are made in China. 3CX3000A7 $850. Also seen is the input swamping resistors. As I recall, new tubes cost somewhere north of $8,000. com. We are working to return the backlog of repairs that were in process when we were forced to cease operations because of Covid-19.