How to test 811a tubes

And also how I test to see how far out of balance tubes are in a multi tube linear ampli Aug 3, 2021 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Quick Picks. Add to cart. The USPS is Experiencing Serious Delays - Domestically and Worldwide. Each. SKU: 85-2565 Category: 811 * 30 Day Rock Solid Warranty on ALL NOS Tubes! We test your order before shipment for world This tube was operated from a large power supply that had a string of 1 ohm 2 watt fault resistors: Internal Anodes. This is a 4K IP PoE NVR Camera from Reolink that has a 5x zoom, Smart AI - Person, Vehicle Description. Jan 2, 2020 · The ICAS dissipation rating of a 811A tube is 60 or 65 watts per tube (average) or 240-260 watts for the Al-811H amp (ignoring cooling fans, heat reflection off tube housings etc. $263. I selected the Zener diode method of bias because it is easy to install in the center tap circuit of the filament transformer and provides the necessary operating bias, which is again not used on many 811A amplifiers. Even an 811A should not be tested that low. Many lower power tubes use internal anodes. Tube Data Sheet Locator. ridgid. Part Number: AME-AL-811HDXCE. 2. Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. You are most likely familiar with seeing Psvane tubes sold in proprietary Oct 20, 2023 · 811A tubes, so I thought I’d test mine that I have used in my 30L-1 amp. 3) Test the filament to grid. Power Gain of AL811H Amplifier. The 811A is capable of outputting up to 160 watts at frequencies up to 30 MHz. Get y Introduction. Forgot to add that one socket required compressing Mark one of the wires as shown in the photo below with a wire zip tie then, unsolder both wires from the jumpers. Internal anode tubes can use any electron emitter or grid configuration, although the most common large transmitting types use thoriated-tungsten filament/cathodes. $30. But these Chinese-made 811A's shoddy construction is going to ruin both Penta Labs' and RF Parts' reputation. One 811A Remove the foam packing material (around the tubes) that secures the 811A tubes during transit. 91. Better yet, use a megger. An instructional video on changing the dies in the RIDGID 811 Die Head. incl VAT: £ 195. 811A Tube | eBay. 6%. Apr 10, 2016 · When a vacuum tube develops an air leak (a small crack or bad seal by a pin for example) this getter color will change to pure white. Limited Supply. WAIT for the bleeders to work. 811A 24W SE AMP 2000 Apr 24, 2023 · 1pc psvane hifi 811a triode vacuum tube tested replace 811 fu-811a forAl-811h, hf amp, 800w, (4) 811a tubes, us 120vac 811a psvane hifi triode 1pc replace vacuum amplifier fu811a amp se tube regulator 24w. Add to basket. The 811A amplifier is capable of outputting up to 160 watts at frequencies up to 30 MHz. Price excl VAT: £ 162. A simple way to ensure there are no shorts or bad heaters in your tubes. Thomson-CSF 811A Transmitting Tubes - Matched Pair - The Step 2: The Triode. Shuguang FU-811 (Current production, often rebranded, Chinese): >$25 USD / tube. These tubes served me for 25 years! The transconductance of the newer set (with one year of service) gave me. If any resistance, toss the tube. It will, however test the more common ham tubes like the 6146, 807, 6L6, and 811A. You even get 400 watts on demanding Feb 26, 2016 · Repair on a Ameritron 3- tube 811 that someone converted to a 4- 572B. Jan 2, 2021 · This video looks at the evolution and operation of the 811 tube. The amp produces 800w CW 10m, 850w CW Jan 27, 2023 · tester or in circuit, I do a few simple steps: 1) Test the filament for continuity. I suspect the heater filament which is also the cathode in these valves, is coated with something to help it Remove the foam packing material (around the tubes) that secures the 811A tubes during transit. Categories: HAM Radio, Industrial Tags: 811A, Broadcast, HAM, High Mu, Power Triode. Opens in a new window or tab. The first true electronic amplifier was the vacuum tube triode. On an emission tester, set heater to 12. It works because like charges (in this case, electrons) repel each other. Aug 14, 2023 · Check Details 811a tube 572b tube history – w8ji website. 811, CV628, CV9853, VT217. #4. Demonstration of a B&K Model 606 Dyna Jet tube tester. Dec 3, 2012 · The very cheap Vacuum Tube model 811a (original) damaged in AMERITRON AL811H in my RF power amplifier after a year of DX !Now I want to try out the model 572 What’s in the box of Reolink’s new 4K PoE spotlight camera? Watch the video to find out and learn how to set up and install the camera within 5 minutes. Oct 17, 2022 · Power Triode Tubes 811 RCA 811A. Carefully unwrap the tubes. Internal Diameter: 9/16". amptata_audio (4,129) 98. Click Here to Learn More. The envelope, anode, and filament are identical to the 811 tube. Remove the red wire that you took off the plate choke and pull it out of the rubber grommet. The RF Parts Company Tubes (SELECT) 811A is the best quality 811A tube in current production. Photograph 1: EICO 625 Vacuum Tube (Valve) Tester. Jan 1, 2012 · This can add positive feedback, increasing intermodulation distortion. 811h ameritron 811a amplifier hf 800w 120vac 240vac neutralized 120vTube 811a tubes 572b amplifier modern Created Date: 7/17/2007 6:09:54 PM Jun 14, 2005 · This causes twice the voltage drop in the same size wire, for the same output wattage on the linear. Pinout is close to 6JS6, 6LB6, (6KD6 is closest, though the 8950 has an extra connection to the cathode on pin 6). These tubes will serve as replacements in any 811A Jun 25, 2012 · A few 811A valves that are slightly radioactive. The modern TAYLOR 572B is virtually an exact copy (both mechanical & electrical) of the original Cetron 572B/T160L tube. The Shuguang tube is the most commonly used 811A variant, mainly due to the fact that they are Sylvania 811A Vacuum Tubes $60. I think it needs a bigger transformer to supply 811A Tube History and Construction. Upgraded the 811A tubes in my AL-811 Amplifier to 572B tubes. Designed to generate oscillations at frequencies not exceeding 60MHz and to amplify power in radio engineering devices for a wide range of applications. Al-811, hf amp, 600w, (3) 811a tubes811 tube history including 811a 572b 811a tube psvane transmitter811a transmitting csf thomson tubes matched pair. 811a vacuum emission. More about this upgrade on my website:http://kn6q. The Sino 811A is a greatly improved version and is a cost-effective and suitable replacement for any 811A. Get the best deals on 811 Tube when you SUPERB SYLVANIA 811 VINTAGE TUBE - TV7 HIGH TEST. Jan 14, 2024 · 811a tube811a amp se tube regulator 24w 811a tubes for saleAl-811h, hf amp, 800w, (4) 811a tubes, us 120vac. This is a GE 812 tube. New Matched Quad (4 pcs) Psvane Type 811A 811 Vacuum Tubes - USA Seller. 1 Year Limited Warranty through RF Parts. To be reliable an 811A tube should hold off nearly 5 kV with minimal leakage and no sign of arcing. Tube amplifiers are a popular project among hams. 811A Monoblock Amplifier MARK II - Thivanlabs. Build quality is good and failure rates to date have been extremely low. Remove the foam packing material (around the tubes) that secures the 811A tubes during transit. Cascode designs were very popular in the decade of '80s. The Yaesu FL2100 series, the Dentron Clipperton L, and the Collins 30L1 amp with 811A tubes, are particularly unstable designs. Can be used in the output stages of low frequency amplifiers. from China. We are so happy that Psvane is producing the 811A because it’s the only one on the market. 99. Our goal is to match within 5% with an upper limit of 15% (15% is the industry limit to consider a set). Turn the drive down, and the current demand drops with it. Penta Labs is the top source for tubes in the medical, scientific, industrial, audio Jun 17, 2009 · I'll only temper this with I too continue to own a Heathkit HA-572B* , two home brew 811A twin tube nightmares, and a single tube tester for 811 and 572B. The NL-811A is a three-electrode tube designed for use as a class B audio-frequency power amplifier and modulator. Over the past 70 years we have stayed true to our mission which is to provide premium quality products along with an exceptional customer experience. The Penta Labs’ 811A high power RF amplifier is capable of outputting up to 160 watts at frequencies up to 30 MHz. New Psvane 811A Vacuum Tube. Take a look at picture 1. The plate is the same size as other 811A tubes from China and both China and Svetlana rate the G-811 tube at 60 watts ICAS plate dissipation. High-mu power triode for use in Class AB 2, Class B, Class C RF, and audio amplifiers. 811A / 811 ~ TUBE~TEST STRONG~AMPLIFIER~VALVE~SHORT WAVE~RADIO. comMy other websites are www. Add to Cart. AL-811 gives you a powerful punch at a price thats easy on your wallet. 45 shipping. All are Svetlanas. $ 49. 4. org/ameritron-al-811-tube-upgrade-from-811a-t That will require a tube tester of a later design since the TV-7 pre-dates sweep tubes. There is one person who may reply the tubes have an undersized plate and junk. Tested and/or matched on a fully calibrated Oct 21, 2023 · 811A tube 572B tube history – W8JI Website. Tube 811a standby tubes while hf amplifier 572b unstable w8ji811a tubes 811a psvane hifi triode 1pc vacuum replace fu amplifierTube 811a 572b vacuum anode. 811a tube 572b tube history811a amplifier diyaudio 1pcs 811a811a 572b w8ji. CV5043. It covers the history of He Oct 30, 2021 · In an eHam review, another ham has been using these G-811 tubes for 20 years without failure. Time Owned: more than 12 months. Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. 811A Tubes for sale | Only 3 left at -75%. These are extremely robust and feature a thorium tungsten cathode. These heavy-duty 811As are a modern version of the venerable vacuum tube that has been around for a long, long time. Please see the substitutes at the top of the page for more details. Its does use a 0-120 quality scale rather than reading true GMhos, which seems to be a major hangup with some people. In class B service and in unmodulated class C service, the NL- 811A has a maximum plate dissipation of 65 watts (ICAS). . Be prepared for some creative circuitry. 811a 24w se amp 2000811a tube 572b tube history 811a anode w8ji permissibleAmeritron Tube 811A FU-811 for Medical Tube Transmitter Triode Valve Vacuum Tube. Free shipping. If the 811A tubes haven't had this same (mis)treatment yet, try them on a 240-Volt circuit, if you can. With the original 811 tubes in the amp, it usually put out around 650 watts. Tuned Input: A Pi-Network tuned input matches the 811A tubes to 50 ohm exciters. Item has been added to your cart. There are more details on my old legacy website www. RCA 811A (NOS, USA Made): >$45 USD / tube. You can't see the filament in a ceramic tube, but it does its job just the same. The amplifier operates the tubes beyond tube Ameritron HF Power Amplifiers AL-811HDXCE. A 572B should hold off over 8,000 volts. If you ground the HV to discharge, do NOT use a dead short unless the voltage is Jun 18, 2023 · 811a tubes for sale811a tube 811a tube 572b tube history – w8ji website811a monoblock amplifier mark ii. * for those of you that don't understand the subtlety of the joke, it's a Heath HA-10 Warrior with upgraded transformer and 572B tubes. Testing and/or Matching. 811A: pdf. This plate cap is sized to fit the popular 811A / 572B style plate cap of approximately 9/16" diameter. 00. Follow the steps below: Connect the positive probe of the multimeter to the cathode of the vacuum tube and the negative probe to the anode. Price. Theres no compromise on WARC and most MARS bands -- you get 100% rated output. Rectifier tubes will be tested for emissions on a calibrated military grade tube tester. 8950 has a unique pinout, was designed for use as an RF power amplifier, with a 12V heater for mobile use. Size: 1-1/2" long x 13/16" wide x 3/4" High. Usage tests show it to be equal to the much-respected RCA, 811A and Svetlana, 811A. A great choice for your high-frequency oscillation power amplifier. Never defeat the interlock. New Old Stock * No longer available fo reexport. Cathode – tungsten direct heating. The Cetron 811As produced about 25 watts higher output over the excellent Svetlana tubes. 380-0811a, al-811 amplifier811a psvane (select) transmitter tube 811a 572b w8ji periods1pcs medical tube amp light tube 811a fu-811. While not a curve tracer or tool for matching tubes, i Ameritron AL811H tube selection. A Note on Psvane Packaging & Matching. I am trying to test some of my 12AU7 tubes. Triode Electronics. These tubes were compared to a new set of now discontinued Svetlana 811A tubes. 811a tubes for sale811a mu frequency 811a 572b w8ji periods811a 24w se amp 2000. Long Tube Life: The 811A tubes are long life, reliable transmitting tubes. 57. the Shishido 811A amp. With the 572B tubes, the amp now puts out around 750 watts. $76. Check Details May 21, 2020 · 811 Mu is extremely high, but the plate resistance is extremely high too. We are sole European distributors for the brand. Estimated Ship Date: Dec 9, 2024 (if ordered today) Free Shipping. com/vru1g9-tube-tester-b-and-k-model Dec 30, 2013 · I just got a tube tester. the tubes. The 572B is an indirect descendent of the 811 tube. Ceramic tubes replaced the glass bottle tubes years ago, and out perform the glass bottle tubes in a big way. 811a tube china made. Highly Sep 21, 2019 · This video is a documentary on tube testers/checkers, and the Heathkit line of testers in particular, and especially my own IT-21. 13. MFR: Millen Manufacturing Company. This theory should work for Au Jan 28, 2024 · 811A PSVANE (SELECT) Transmitter Tube. The AL-811H amp is rated for 800 watts PEP output with either 811A or 572B tubes installed, but I think that number is a little high myself. Each valve is tested, supplied with matching data and comes with a 6 month warranty. In November 2021 I purchased a matched set of PSVane 811a tubes directly from a supplier in China via the Aliexpress website. Not Yet Reviewed. RCA 811A. Feb 19, 2016 · So far, I have identified 3 options on the market at the moment: Ryazan G-811 (NOS, made in the former USSR): ~$18 USD / tube. Fast Warm Up Time: The 811A tubes take approximately 3 seconds to warm-up. $8. ) Remove the subassembly from the amplifier and place the amplifier out of the way. #2. 572B Taylor Select. So does the voltage drop on the outlet wiring. Notes: Requires a standard four-pin socket and may be operated in a vertical position base down or in a horizontal position with pins 1 and 4 in vertical plane (pins 1 and 4 align straight up and down). See the full video here:https://rumble. Tuning the AL811H was exactly the same and the input SWR did not change. I will not purchase nor will I build another. Detailed application of this rating seems to be a little ill defined but the general view is that if you run the amp at an average (over short term duty cycle Oct 28, 2017 · multimeter is a simple tool to check your vacuum tubes. Name: 811A Use: Thoriated-tungsten-filament tube type used as AF power amplifier and modulator and as RF power amplifier and oscillator. Many hams like the challenging of hunting for parts to build a high quality amplifier out of inexpensive surplus parts. and the modified Shishido schematic. 811A: gif1, gif2, gif3, gif4, gif5, gif6, gif7, gif8. Aug 20, 2023 · 811a tubes for sale811a tube 572b tube history 811 811a 572bThomson-csf 811a transmitting tubes. Two Illuminated Panel Meters: The AL-811 May 9, 2010 · It is in fact a shorted tube, it was the number one tube, or the one farthest to the left looking from the front of the amp. It is well suited also for class C telephony, telegraphy, and self-rectifying service. This is an amplification of about twelve times. Do not confuse this with blue glow that is often May 26, 2007 · Consider the benefits of ceramic tubes. 811 is suited for audio class B amplifiers with negative feedback. NEVER remove the cover with the amplifier connected to power mains. To install the tubes in the sockets, be sure the large diameter pins line up with the two large diameter holes in each socket. 4) Test the plate to filament. The 811A needs 4 amperes of heater current with both separate 4A heater current, and regulated, buffered, positive DC bias and test signal. filament) is 1100, 1250, and 1100. Brand New. Generator triode tube G-811 with a high gain and a “right” characteristic. Do you suspect a filament burn? We would like to show you a description here but the site won’t allow us. The 812 was used in some higher power WW II AM transmitters. The Ameritron AL-811H amplifier is designed for four 811A triode tubes. Testing good and bad tubes. 95 each. Caution: If no bias is used, the resting plate current will be 150 mA for the four tubes. Do not dislodge or break the shaft that is connected to the rear input bandswitch wafer. Hand written test data included. 811a amplifier จาก นท schaltung elektronische entdecke. 811a monoblock amplifier mark ii. Different rating or performance. Amplifier, CE Certified, Four 572B Tubes, 800 W Output PEP, 160-10 meters, 240 Vac, 5 A Max. 811 Tube History including 811A 572B - YouTube. In severe cases, the amplifier becomes unstable and oscillates under some tuning conditions at or near the operating frequency. No evidence of a diode blowing out, so I ordered 4 matched 811A's from E-Bay and will have them on Wednesday. Check Details. The Penta Laboratories 811A is a high mu power triode designed for service as an audio frequency amplifier or modulator, or as an RF amplifier or oscillator. Jun 30, 2023 · 811a tubes for sale811 tube history including 811a 572b Amplifier 811a 2m ameritron tube811a anode w8ji permissible. Yes, you can't just use them with no feedback and expect good results. But because of their disadvantage producing a “transistor coloured” sound, it's not my personal choice. I have built 13 pairs of 811A monoblocks. 50. 811A 572B 3-500Z Vacuum Tubes For Sale – CTR Engineering, Inc. With 60 watts of drive power, output is 720 watts. -~-~~-~~~-~~-~-Please watch: "Marshall Dua We would like to show you a description here but the site won’t allow us. Here's what the chart says: 12AU7 Tests 1-2: 2-2 6. com/us/en/optional-die- Oct 27, 2021 · Oct 27, 2021. Two Illuminated Panel Meters: The AL-811 How to test your tubes with a multimeter. TubeZone. I would absolutely ignore any designs out there that don't use feedback, as the plate impedance of an 811A will be around 30K give or take. Here I show the repair and modification of a Ameritron Al-811h 572b TubesEnjoy ELECTRON TUBES FOR INDUSTRY 811A Power Triode The Penta Laboratories 811A is a high mu power triode designed for service as an audio frequency am-plifi er or modulator, or as an RF amplifi er or oscillator. I will replace all 3 tubes and that will leave me with 3 extra's as needed. All band, All mode coverage The AL-811 covers all HF bands. It looks similar to the symbol for a vacuum tube diode, but it has an extra part that looks like a grid between the plate and filament. K4PVK. 6V and test as any of those tubes - pins with "shorts" indications Remove the foam packing material (around the tubes) that secures the 811A tubes during transit. We addressed some issue with the amp. Keep in mind that the before 1982, the FCC regulated hams according to input power, so when hams talk about a 1kW amplifier, they are referring to 1kW input, not Ameritron 811A Replacement Power Tubes. $ 39. In addition, power tubes are tested/matched by plate current (Ip) and preamp tubes are tested/matched by gain. For more information on our products, visit https://www. 811 is suited for Class C RF amplifiers. PSVane 811a Tubes. These are Germany BWB Military tested tubes, no one else knows how or has the gear to test the 811A properly as most tube testers others have do not have 4 amperes of heater current. See full list on w8ji. 95. 811A tubes offer rugged, reliable operation even on RTTY and SSTV 3. Base indexed and internal structure aligned and supported for both horizontal Mar 6, 2021 · Product Description. Tested and verified. A Matched set of four Thomson CSF 811A transmitting tubes / valves. Always verify high voltage is zero volts with the front panel meter before touching anything. Jan 22, 2024 · 811A PSVANE (SELECT) Transmitter Tube. AL-811, HF AMP, 600W, (3) 811A TUBES | MFJ Enterprises Inc. It's hard to test and getter these tubes unless you have a tube tester that will do this job in one step. If open, then toss it in the can. The transconductance of the older set of three (one developed an open. The lone 6H6 diode is used to rectify one of the AC filament voltage for the neon indicator bulb used for identify "Tube Short". This article examines the performance of the Ameritron AL-811H amplifier with the supplied 811A tubes and with 572B tubes, and details a procedure for replacement of existing tubes. Ameritron 811A Replacement Power Tubes are available for all-purpose Amateur Radio service. Rating: 2023-02-22. Yes, you need to operate these in A2. They have proven themselves in all kinds of amateur, commercial, and military service. Feb 10, 2021 · Here I show the repair of a ameritron 811 amplifierCustomer supplied a new set of 572b tubes per my advice. Apr 12, 2020 · Ameritron AL811 - I recently installed a set of 3 Cetron 572B tubes into my amp to test performance and compatibility. w8ji. The older AL811H (prior to drive resistor modification) with good tubes and stable power line, when properly tuned and operating in the linear region, has about 11 dB gain. Made china 811a tube Amplifier 811a. Third, look for a purple glow that is very focused around specific elements inside the tube. 2) Test the plate to grid with a high-ohms meter. 5. 811 is not a good tool for the average audio amp. Get 600 watts output PEP SSB and 500 watts output CW. com Fast Warm Up Time: The 811A tubes take approximately 3 seconds to warm-up. May 5, 2020 · BG280 - How to measure the Plate (Anode) Current in most vacuum tube amplifiers and actually understanding what you just did. 00 In Stock! * 30 Day Rock Solid Warranty on ALL NOS Tubes! We test your order before shipment for world class performance and the 811A Substitutes. Today, we are going to check out and review the Reolink RLC-811A. My question is, what is test 1-2 for? Is it for test type 1 and test type 2? What's the difference between the two tests? Then, 345-458 means, 345 for test type 1 and 458 for Sep 18, 2022 · I purchased a Heathkit TC-2 tube tester on eBay to have something to quickly test and vet tubes with. Pre-Owned · Unbranded. 572B. or Best Offer. Close or identical. You can operate the AL-811 on all modes. Introduction. PRC. Feb 2, 2009 · The first is the cascode design in the voltage amplification stage. Electrical Characteristics Matched Pair AMPTATA 811A Perfect HIFI Audio Vacuum Tube Amp Classic New Tested. 811A tube 572B tube history – W8JI Website. May 6, 2022 · Here I show how I test the emission level in a customers 572b tube. 811A Tubes for sale | Only 3 left at -75% Check Details Penta Laboratories has been the worldwide leader in vacuum tubes, electron tubes and capacitors since 1951. 3 25-25 12-67 345-458 In 345-458, 45 is in bold. The 812 was a moderately low mu tube, primarily intended for grid driven modulator service. Point the controlling needle of the digital multimeter to the Ampere area of the ring and check if there is any current flow across the vacuum tube. comman Jan 15, 2017 · Jan 16, 2017. Clear the bench! 811A RF Parts Company (SELECT) Transmitter Tube, Matched Quad (4) $195. Inside the EICO 625 tube testers there is a vacuum tube under the panel. Gettering tubes 3-500Z, 572B, and similar. The Cetron has the 'U' shaped ribs on both sides of the plate just like the older RCA 811A. ). Ameritron AL811H converted to AL811HD with 4 x 572B tubes Nov 22, 2014 · The EICO 625 tube tester has many different tube sockets including ones for 4 and 5-pin tubes. Instead I use a cathode follower design using the I've seen test data from Chinese 572B's where the tubes were tested for arcing and failure at 1,500 volts dc anode voltage. If you see this you know with 100% certainty that the tube is bad. gs ab py eo md yx es cn ve ov