Ameritron al811 with 572b - Not a huge difference in output, but definitely measurable using a typical watt meter (not the ears on the other end).

 
Product is in production. . Ameritron al811 with 572b

Ameritron al811 with 572b. Only the Ameritron AL-811H gives you four fully neutralized 811A transmitting tubes. AMERITRON AL-811 with 572b. Get a higher power tank circuit and grid overload protection. These kits include all the parts to bring your Ameritron AL811 and AL811H amplifier up to date. Four rugged 572B tubes give you an instant 3 second warm-up time. AL-811HD gives you the AL-811H with four 572B tubes installed. My 811HD needed new set of tubes, 572B's. Get a higher power tank circuit and grid overload protection. "/> accident in. you have to be very mean to them to make them go south. Left one leg of the diode to check it. AL811 Tuning. and no one will ever know the difference!. Grid Overload Protection protects the tubes from excessive grid current due to mistuning and it protects against excessive drive power. pep watts. Get 600 watts output PEP SSB and 500 watts output CW. Model: AL-811H: Date: Category: Rádio Comunicação, Group: Amplificador: Description: Linear Amplifier: Information: The AL-811H is a grounded grid linear Amplifier developed by Ameritron using low cost 811A power triodes. Quantity: Sold individually. AL811 Changes. Reviews: 185. I've run a Ranger 811H self modded with 572B valves now for over twelve years and it has never given me any issues. Notes: US 120 V model. The Ameritron AL-811HDXCE gives you the AL-811H with four 572B tubes installed. it appears the tank coil, switch and etc are also the same. AL 811 AMERITRON User Manual usermanual. I've run a Ranger 811H self modded with 572B valves now for over twelve years and it has never given me any issues. Ameritron AL-811H 800W HF Amplifier - 4 x 811A Tubes, 120V. rf power tube penta 572b / t160l nos rf power tube penta 572b / t160l nos, sku: tube7-2231 dimensions: 2x2x3. We also sell quality 572B, 811A, and 3-500 tubes and almost . Amplificador Lineal Ameritron AL-811 Equipado con tres lámparas 572B nuevas solo usadas para probar el equipo ( menos de una hora). It is not standard on the economy amps in the AL-811 series. Now you wont have to stand aside while the "big guns" steal your DX. The Ameritron AL-80B is an 800 watt CW, 1000 watt PEP output linear amplifier that operates on all Amateur bands from 160 through 15 meters. Ameritron al811 with 572b. All in all the AL-811 is a good amplifier for the money. We also sell quality 572B, 811A, and 3-500 tubes and almost . to do this key the amplifier with no carrier or RF input. We also sell quality 572B, 811A, and 3-500 tubes and almost any other RF parts you might need. Update 10/11/2008 - AL-811HD. Amplifier in original packaging with binder manual. amplifier that operates reliably from 160 through15 meters. Ameritron AL811H converted to AL811HD with 4 x 572B tubes. 95* *After Coupons & Promotions. Opmerking: Alle door ClassicInternational geleverde Ameritron lineairs zijn. AL 811 AMERITRON User Manual usermanual. user manual al ameritron wiki pdf navigation. 811A Tube History and Construction. The AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTV and AM operation. So why not run it at 800w output using 572B's ? Beats me. It has not been 115/230 since the 1960's. AL-811 811A Tube upgrade to DX Engineering 572B 32,112 views Aug 29, 2017 236 Dislike Share Save Thomas Kisner 140 subscribers Upgraded the 811A tubes in my AL-811 Amplifier to 572B tubes. Heavy duty components allow for operation at 600 watts continuous output on CW, RTTY, SSTV, FM, and AM operation!. Ball bearing vernier reduction drives on plate and load controls make tuning precise and easy. And while we're on that topic; since the power supply of the AL-811 is the same as that of the AL-811H (isn't it?), and a trio of 572B's can easily handle the plate dissipation that goes along with pumping out 800 watts PEP, shouldn't it be possible to safely crank the 3-hole AL-811 up to 800 watts PEP output, the same limit as its 4-hole AL. 350 !". The trouble with the 811A, is a real one hasn't been made since the 1970's. AL-811HD gives you 800 Watts output in SSB. Three tough 811A transmitting tubes, extra heavy duty. The AL-811H is rated at 800-watts PEP voice on a good peak reading meter. WARC bands and 10 Meters with reduced performance - user modified for 10/12 Meters with license. Ameritron AL-811HD amplifiers, with four rugged 572B tubes, give you 800 watts PEP output for that extra punch needed when 100 watt transceivers just. The AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTV and AM operation. 811A's run quite hot in comparison to 572B's but I'm not altogether sold on all the hype either. pandas union all dataframes. We also sell quality 572B, 811A, and 3-500 tubes and almost any other RF parts you might need. 62 PROBABLY YOUR RESISTORS ARE FRIED, AND THIS IS FOR BEST STABILITY WITH MODERN TUBES. The AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTV and AM operation. Nov 02, 2022 · File Name: ameritron-al-811-user-manual. mr_h4ck3rm4n Radio Addict Posts: 593 Joined: 27 Oct 2008, 02:08 Call Sign: MM6SGZ Location: North Ayrshire, Scotland. Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. ameritron als 500m meter hf amplifier solid. Gettering tubes 3-500Z, 572B, and similar AL572B AL80B [ Home ] [ Up ] When I designed the AL80B and AL572 amplifiers, I included a high voltage reduction provision. Grid Overload Protection protects the tubes from excessive grid current due to mistuning and it protects against excessive drive power. qy Back. 572B tube for sale Good soldering 100% inspected Properly installed anode connectors Warranty 1 year from date of sale against gas, shorts, and emission loss when operated within manufacturer’s specifications. Four 572B tubes give you more plate dissipation than a single 3-500Z tube. Ameritron Al-811 linear amplifier gives you plenty power to bust thru QRM. I would limit to 700 watts CW and 500 watts RTTY with 572B tubes. Installed them and what a surprise. hi; ce. The price seems reasonable ($600) and is listed as "great shape" I was thinking of picking it up for my first amp. In some cases it may be drop shipped directly to you. I bought the amp used and have only used it a few times. AL811 trouble shooting - Ameritron AL80B AL811H AL572 Amplifier Trouble Shooting. Ameritron HF Power Amplifiers Ameritron AL-811HD amplifiers, with four rugged 572B tubes, give you 800 watts PEP output for that extra punch needed when 100 watt transceivers just aren't enough to be heard. Review Summary For : Ameritron AL-811H. 50 Watts in equals 550-600 out. The Ameritron AL-811HDXCE gives you the AL-811H with four 572B tubes installed. AL811 Changes. Estimated Ship Date: Jan 4, 2023. Use of 572. AL-811HD gives you the AL-811H with four 572B tubes installed. QSK Compatible. AL811 and AL811H Fan Kit; TOF-1 Amplifier Tuning Aid; RF Transistors and Semiconductors; HV Tester; EBM G2S085 G2E085 Blowers; Universal Relay Line Buffer;. The AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTV and AM operation. So, 800 watts PEP is available from this amp with three 572B tubes. ameritron-al-811h-user-manual 1/2 Downloaded from arts. Ameritron AL-811 HF Linear Amplifier With 10 Meters 80-10. If you operate SSB and have a reasonably good power line, you will see no improvement going to 240V on any amplifier shipped as 120V. AMERITRON mounts the 572B tubes vertically, not horizontally, to prevent hot tube elements from sagging and shorting out. 4 811A tubes. Companies are hesitant to disclose the tube source because they're all coming from the same garbage manufacturer in China. Ameritron 811 and 811H Upgrade Kits Link to pdf file 811KP (protection) and 811KS (supply) instructions: AL811 and AL811H Upgrade Kit Manual (Rev2) These kits include all the parts to bring your Ameritron AL811 and AL811H amplifier up to date. Heavy duty components allow for operation at 600 watts continuous output on CW, RTTY, SSTV, FM, and AM operation! Ameritron AL-811HD amplifiers feature grid overload. Quantity: Sold individually. These heavy duty power transformers feature a high silicon steel core weighing a hefty 17 lbs. You get 1300 Watts PEP SSB nominal power out on amateur bands 160-15M. This includes the AL572 and AL800 series. Four 572B tubes give you more plate dissipation than a single 3-500Z tube. It has not been 110V and 220V since before WWII. Ameritron Al-572 Hf Ham Radio Amplifier For Parts Or Restoration Sn 11658 hamradioamplifier. The US$80 additional cost of a set of 572B tubes is less than 10% of the price of the amplifier (US$899 at 10/11/2008). , Each See More Specifications. AL811H, AMERITRON AL811H 800Watt LINEAR (4) 811A TUBES 110Vac, US, $1,399. I bought the amp used and have only used it a few times. The heart of the AL-811 power supply is its heavy duty power transformer with high silicon steel core weighing a hefty 17 pounds. A few light scratches but overall excellent condition. At 1800V the Chinese 811's are run well above a safe level and have high failure rates in the 811 and 811H. It has not been 110V and 220V since before WWII. Four 572B tubes give you more plate dissipation than a single 3-500Z tube. young justice fanfiction wally bleeding x x. Ameritron AL-811H - YouTube www. Ameritron al811 with 572b. It easily runs about 800 watts PEP, using a single 3-500ZG tube. Tune the amp up properly and then run whatever drive level you need to see about 100 watts carrier out of the amp and cross your fingers until you replace the tubes. Ameritrons exclusive ParasiticKiller effectively suppresses all parasitic oscillations. Please note that some processing of your personal data may not require your consent, but you have a right to object to such processing. The Ameritron AL-811HDXCE gives you the AL-811H with four 572B tubes installed. The three tube AL-811 seems to be fading away; no neutralization and a number of other lacking features may make it worth while to spend more on the 4 tube model, which has the essentials. Power line voltage in the USA is 120 or 240 nominal. $700 do NOT contact me with unsolicited services or offers post id: 7554003914 posted: 3 days ago ♥ best of [?]. drugs to euthanize a cat. 811A Tube History and Construction. If you operate SSB and have a reasonably good power line, you will see no improvement going to 240V on any amplifier shipped as 120V. 00 lbs. Has a set of four 572B tubes. Log In My Account zb. I designed the AL811 and AL811H amplifiers as the cheapest possible amplifier for medium power amateur SSB and CW use only. PLATE VOLTAGE: This modification raised the measured idle plate voltage on my AL-811 from 1688 VDC to 1864 VDC. They give you nearly full legal SSB power output for a fraction of the. The following is a list of critical production problems: Inadequate Cooling. Using 572B's is a a no brainer plug in replacement with all ups, and no downside. AL811 Tuning. Ameritron AL-800 Amplifier Service And User Manual www. and no one will ever know the. With the 572B tubes, the amp now puts out around 750 watts. The AL-572 amplifier certainly has differences from the AL-811 series but those differences are only there to use the full potential of the 572B tubes graphite plate. AL-811HD gives you 800 Watts output in SSB. And while we're on that topic; since the power supply of the AL-811 is the same as that of the AL-811H (isn't it?), and a trio of 572B's can easily handle the plate dissipation that goes along with pumping out 800 watts PEP, shouldn't it be possible to safely crank the 3-hole AL-811 up to 800 watts PEP output, the same limit as its 4-hole AL. Review Summary For : Ameritron AL-811H. The 572b tubes are a very durable transmitting tube. Tune the amp up properly and then run whatever drive level you need to see about 100 watts carrier out of the amp and cross your fingers until you replace the tubes. 5K views 2 years ago Ameritron AL811 - I recently installed a set of 3 Cetron 572B tubes into my amp. Log In My Account qz. The design was long before FT8, and never intended for AM use. Jun 9, 2005. The AL-811 is rated at 600-watts PEP voice, or just over 400-watts carrier in normal CW modes. The AL-811HD gives you the AL-811H but with four 572B tubes installed. Each tube has a heavy duty Graphite Anode, low loss which Ceramic Base, superior Titanium Getter and legendary quality. The US$80 additional cost of a set of 572B tubes is less than 10% of the price of the amplifier (US$899 at 10/11/2008). AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTVand AM operation. do NOT contact me with unsolicited services or offers. wj; kv. Features four 572B tubes. Correct minimum airflow is about 18-20 cfm on normal SSB and CW with three 811A tubes (25% less power), and 25-28 cfm on higher duty cycle modes for four 811A. ld; jy. Log In My Account qz. The AWM-30 Ameritron is a very good peak reading meter, as are meters in Ameritron tuners. Amplificador Lineal Ameritron AL-811 Equipado con tres lámparas 572B nuevas solo usadas para probar el equipo ( menos de una hora). Ameritron AL-811H tube selection - 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. I had already checked most all other diodes and. Others, using potentially damaging horizontal mounting, require hard-to-find 572B tubes to retard harmful. Get a higher power tank circuit and grid overload protection. Ameritron AL-82 Ameritron `s Dual 3-500Z AmplifierThe Ameritron AL-82 Linear Amplifier is designed to give you years of trouble free service at. clipperton dentron 572b. My preference would be given to the latter because I have more experience with it. The Ameritron advantage becomes apparent at the heart of the AL-811 amplifiers with their power supply. These kits include all the parts to bring your Ameritron AL811 and AL811H amplifier up to date. The AL-811H is rated at 800-watts PEP voice on a good peak reading meter. 50 Watts in equals 550-600 out. In some cases it may be drop shipped directly to you. Power line voltage in the USA is 120 or 240 nominal. Son de la marca PSVANE de fabricación china. AL-811 811A Tube upgrade to DX Engineering 572B - YouTube 0:00 / 15:07 AL-811 811A Tube upgrade to DX Engineering 572B Thomas Kisner 148 subscribers Subscribe 250 33K views 5 years ago. Grid Overload Protection protects the tubes from excessive grid current due to mistuning and it protects against excessive drive power. Die Röhre 572B hat bei gleichem Sockel und ähnlicher Charakteristik ( Tabelle 1) eine . Four 572B tubes give you . ameritron al-811 800w HF amplifier with 3 factory tubes - tubes are new and in original packaging (usual cost $49. I designed the AL811 and AL811H amplifiers as the cheapest possible amplifier for medium power amateur SSB and CW use only. This includes the AL572 and AL800 series. rf power tube penta 572b / t160l nos rf power tube penta 572b / t160l nos, sku: tube7-2231 dimensions: 2x2x3. ameritron al-811 800w HF amplifier with 3 factory tubes - tubes are new and in original packaging (usual cost $49. A local family is selling a silent key's Ameritron AL-811H. A full wave bridge using 52. ameritron al-811 800w HF amplifier with 3 factory tubes - tubes are new and in original packaging (usual cost $49. The Ameritron AL-811HDXCE gives you the AL-811H with four 572B tubes installed. Four 572B tubes give you more plate dissipation than a single 3-500Z tube. If the power supply is the same, and if the AL-811H can drive three 572B tubes to 800 watts output (fourth hole empty, as recommended by W8JI), then why can't the AL-811 do the same? Or perhaps it can; not that I need it to. 572B to 811A Time Owned: more than 12 months. SUBASSEMBLY, PCB, PARASITIC CHOKES AND PLATE CAPS: 50-0572-1 ABOUT $37. Review Summary For : Ameritron AL-572B; Reviews: 0 MSRP: 1400; Description: 1300 Watts PEP SSB nominal power out on 160-15M. FOR SALE! The cabinet is a little banged up and the screws are non-original. Ameritron 811 repair with 4 572 tubes 18,276 views Feb 26, 2016 117 Dislike Share Dropmaul99 3. The plates of the 572B's should not even show ANY color at max output in that amp. 811As) and the Ameritron AL-811H (and 3 tube AL-811). 95 each i dont have a ameritron 811h amp yet but am looking for a good pair for extras when i get the amp next year. 95 each i dont have a ameritron 811h amp yet but am looking for a good pair for extras when i get the amp next year. Only the AMERITRON AL-811HD gives you four fully neutralized 572B transmitting tubes. Four 572B tubes gives you more plate dissipation than a single 3-500Z tube. 99 each although I recommend the RF Parts 811s or OEM Ameritron. to do this key the amplifier with no carrier or RF input. We also sell quality 572B, 811A, and 3-500 tubes and almost any other RF parts you might need. The AL-811H and AL-572B are still in current production, so the clicking or popping problem is apparently controlled, with tubes from qualified sources. Get a higher power tank circuit and grid overload protection. hi; ce. The 572B's will NOT give you any extra power. AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, . Log In My Account zb. 2 days ago · Ad id: 2405199598199020. 00 local pick-up. The cabinet is a little banged up and the screws are non-original. If you operate SSB and have a reasonably good power line, you will see no improvement going to 240V on any amplifier shipped as 120V. Mar 08, 2009 · An Ameritron AL-811 can be 'modded' to run 572's at their normal levels (voltages,etc. 811A Tube History and Construction. 95 Order Now! Description Ameritrons new class of Near Legal Limit Amplifiers give you nearly full legal SSB power output for 65% of the price of a full legal limit amplifier. ld; jy. The AL-. I currently run a tube type amp and would like to switch to a solid state no tune auto band switching amp. Ameritron Al-572 Hf Ham Radio Amplifier For Parts Or Restoration Sn 11658 hamradioamplifier. Ameritron al-811 160 15 meter ham amplifier 600 watts pep with 3x 811as. 50 Watts in equals 550-600 out. Description: 160-10 meter RF Amplifier. I bought the amp used and have only used it a few times. They are not exactly made for AM, will work there, but don't expect much at all, nothing like their usually stated output for SSB/CW. Others, using potentially damaging. Four 572B tubes give you more plate dissipation than a single 3-500Z tube. Ameritron Manufacturer's Part Number: AL-811 Part Type: Amplifiers Product Line: Ameritron HF Power Amplifiers DXE Part Number: AME-AL-811 UPC: 650619013825 Line Cord NEMA Plug: 120 Vac, 5-15P Amplifier Type: Tube Amplifier Band Coverage: 160-15 meters Amplifier Power Output PEP: 600 watts Amplifier Input Power: 100 watts Amplifier Supply Voltage:. This includes the AL572 and AL800 series. That could mean the difference between hearing, "Youre Q-5 armchair copy" and, "Sorry cant copy you, too much QRM. Pi/Pi-L Output Network The AL-572 Pi/Pi-L output network gives you exceptionally smooth tuning, wide matching range, full band coverage and peak performance at all power levels. I have a Ameritron AL-811 that has been converted to use 572B tubes. Click to enlarge. hi; ce. Correct minimum. 5K views 2 years ago Ameritron AL811 - I recently installed a set of 3 Cetron 572B tubes into my amp. Link to Instructions: AL811 and AL811H Upgrade Kit Manual (Rev2) These kits include all the parts to bring your Ameritron AL811 and AL811H amplifier up to date. Ameritrons exclusive ParasiticKiller effectively suppresses all parasitic oscillations. All 811Amplifiers with 572B tubes: 750 mA plate current. 811h ameritron al. Ameritron AL811 - Testing Cetron 572B tubes 7,601 views Apr 12, 2020 122 Dislike Share vk3mh 531 subscribers Ameritron AL811 - I recently installed a set of 3 Cetron 572B tubes into my amp. SUBASSEMBLY, PCB, PARASITIC CHOKES AND PLATE CAPS: 50-0572-1 ABOUT $37. Ameritron HF Power Amplifiers Ameritron AL-811HD amplifiers, with four rugged 572B tubes, give you 800 watts PEP output for that extra punch needed when 100 watt transceivers just aren't enough to be heard. Three tough 811A transmitting tubes, extra heavy duty. The trouble with the 811A, is a real one hasn't been made since the 1970's. 1800 volts is probably the minimum you would want to run them at, they run better at around 2500. Log In My Account qz. 1800 volts is probably the minimum you would want to run them at, they run better at around 2500. 5 out of 5 stars. All in all the AL-811 is a good amplifier for the money. The AWM-30 Ameritron is a very good peak reading meter, as are meters in Ameritron tuners. A local family is selling a silent key's Ameritron AL-811H. These kits include all the parts to bring your Ameritron AL811 and AL811H amplifier up to date. These kits include all the parts to bring your Ameritron AL811 and AL811H amplifier up to date. 95 each i dont have a ameritron 811h amp yet but am looking for a good pair for extras when i get the amp next year. QSK Compatible. 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. While you should NOT run more output, duty cycle can be greatly increased without hurting tube life. AL811 trouble shooting - Ameritron AL80B AL811H AL572 Amplifier Trouble Shooting. AL811 Changes. The amp does use the same power transformer as the 800 watt PEP output rated AL-811H. You get absolute stability and superb performance on higher bands that can’t be matched by un-neutralized tubes. Ameritron al-811 160 15 meter ham amplifier 600 watts pep with 3x 811as. Ameritron Manufacturer's Part Number: AL-811 Part Type: Amplifiers Product Line: Ameritron HF Power Amplifiers DXE Part Number: AME-AL-811 UPC: 650619013825 Line Cord NEMA Plug: 120 Vac, 5-15P Amplifier Type: Tube Amplifier Band Coverage: 160-15 meters Amplifier Power Output PEP: 600 watts Amplifier Input Power: 100 watts Amplifier Supply Voltage:. central park tour. The three tube AL-811 seems to be fading away; no neutralization and a number of other lacking features may make it worth while to spend more on the 4 tube model, which has the essentials. It is not standard on the economy amps in the AL-811 series. Grid Overload Protection protects the tubes from excessive grid current due to mis- tuning and it protects against excessive drive power. HF POWER LINEAR AMPLIFIER PLEASE READ THIS MANUAL BEFORE OPERATING THIS EQUIPMENT ! The Ameritron AL-811HD is an economical 800 watt PEP output linear amplifier that operates reliably from 160 through15 meters. A fellow ham got an Ameritron HL-811H RF amplifier from estate of a deceased. I currently run a tube type amp and would like to switch to a solid state no tune auto band switching amp. Features four 572B tubes. Pi/Pi-L Output Network The AL-572 Pi/Pi-L output network gives you exceptionally smooth tuning, wide matching range, full band coverage and peak performance at all power levels. While you should NOT run more output, duty cycle can be greatly increased without hurting tube life. hi; ce. Ameritron HF Power Amplifiers AL-811. The Ameritron AL-811HDXCE gives you the AL-811H with four 572B tubes installed. Using 572B's is a a no brainer plug in replacement with all ups, and no downside. meg turney nudes

AMERITRON mounts the 572B tubes vertically, not horizontally, to prevent hot tube elements from sagging and shorting out. . Ameritron al811 with 572b

If you operate SSB and have a reasonably good power line, you will see no improvement going to 240V on any amplifier shipped as 120V. . Ameritron al811 with 572b

autosar network management ppt. You get a quiet desktop linear that's so compact that it'll slide right into your station -- you'll hardly know it's there. net>; <Amps@contesting. You get absolute stability and superb performance on higher bands that can’t be matched by un-neutralized tubes. Amplifier in original packaging with binder manual. 00 + $93. The three tube AL-811 seems to be fading away; no neutralization and a number of other lacking features may make it worth while to spend more on the 4 tube model, which has the essentials. When he switched on the amplifier a flashover occurs and smoke swirled up. Ameritron AL-811 Panel Meter Lights - A solutiom for the Ameritron AL-811 (H) RF power amplifier, burnt panel meter lights. Ameritron AL811H converted to AL811HD with 4 x 572B tubes. In the AL572 amp, the 2/3 tap can be used to run 811A tubes!!. You can also use 572B tubes in place of 811A's. Son de la marca PSVANE de fabricación china. 95 Order Now! Description Ameritrons new class of Near Legal Limit Amplifiers give you nearly full legal SSB power output for 65% of the price of a full legal limit amplifier. hf amplifier ham ameritron sn restoration. This greatly extends the life of your amplifier components and tubes. Power tubes,Tubes: Transmitting & Receiving: Starting with ,CETRON 811A 1 PAIR NEW - cmarnica. The AL-811HD gives you the AL-811H but with four 572B tubes installed. Mar 21, 2016. Very nice on 20 meters, slightly less. $700 do NOT contact me with unsolicited services or offers post id: 7554003914 posted: 3 days ago ♥ best of [?]. 4 - low cost tubes (811A) makes it the best watt per dollar in HAM radio. Quantity: Sold individually. The Ameritron AL-811HDXCE gives you the AL-811H with four 572B tubes installed. · sl. Ameritron AL-811 Ham Radio Amp - $425 (Blytheville) AL-811 with 3 spare tubes and the ARB-704 interface. wj; kv. The AL-811H and AL-572B are still in current production, so the clicking or popping problem is apparently controlled, with tubes from qualified sources.

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