The 3 disconnects allow one to remove the front panel if the amplifier should ever require service, allowing easy access to the rest of the components, (next photo). Has strong pair of Eimac 3-500Z tubes. Subito a casa, in tutta sicurezza. It uses the very same 3-500Z tubes. It is about as large as that design can be pushed. The AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTV and AM operation. Actually - The problems with the filaments of the 3-500z tubes were NOT confined to the SB220 amps vack in the 1960 and 70 era. The amp will work 10 through 160 meters. com in a single category. Little bit more gain, running well, good output power, but always used with less drive after the tune up to 500 or 600 watts. 69 in-depth Typeform reviews and ratings of pros/cons, pricing, features and more. Henry Radio Amplifiers Henry knows RF Power! Past Amplifier summary. The 3-500Z is a relatively inexpensive tube and has been around for a long time. I am very impressed with the RF power the tube can deliver to the output. Despite all the travelling I've undergone in June, I still managed to put in very good volume. Many hams like the challenging of hunting for parts to build a high quality amplifier out of inexpensive surplus parts. Transmit/Receive switching 60 + Amps open Vacuum relay Power-line requirements 200/240 Vac 50/60 HZ 50+ or - Amps at 240 Vac Power Supply Heavy duty 3 peak amp steel core transformer and high capacitance. FREE Shipping. Genuine 3-500ZG Tube The AL-80B uses a genuine 3-500ZG tube warranted by the manufacturer -- not cheaper, less reliable 3-500s used by some competitors. R&L Electronics: Text Questions to 513-868-6399: 800-221-7735 HF AMP, 1kW 3-500Z with QSK-5PC INSTALLED 110Vac $1,773. My first build using the 3-500Z triode. Created Date:. The 3-500Z tube in my opinion is: very durable, will tolerate abuse (miss-tuning), relatively available and easy to obtain, instance-on, a pair provides full-legal-limit RF output and best of all, has the best "Power-To-Dollar" value ratio. It is built to last and provide many years of reliable service. do I really need that much to make it. RE: Old 3-500Z « Reply #3 on: May 14, 2019, 02:49:09 PM » I have restored a number of amps that have set for 25 to 30 years in the past. Ameritron 3-500Z Replacement Power Tubes are available for all-purpose Amateur Radio service. first, if ya gotta askand second, running that in ABSOLUTELY no way compares to running a 3-500z base amp. This is a 3-500Z single tube linear amplifier that has 1000 watts PEP SSB. The AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTV and AM operation. 31; or Best Offer Save eimac 3-500z to get e-mail alerts and updates on your eBay Feed. The article neglects all common 3-500Z failures. All frequencies 305 to 30 MHz may be covered with some re- alteration of the input circuit. Peck, W6SNO One-Band Kilowatt Amplifiers Using the 4-125, 4-250, and 4-400 in Kilowatt Amplifiers—. Amplifier tube 3. In a 3-500Z, this force is capable of bending the hot tungsten filament helices and causing a filament-to-grid short. The grid connection to ground should always be as wide and short as possible, and use as many pins as possible. NOTE: Two 3-500Z tubes in a single amplifier, chassis mounted, may be adequately cooled by use of a fan so mounted as to pressurize the space the sockets. Cary 2pc 5pin Base Ceramic Vacuum Tube Socket Fr 3-500z 4-400 U5g Audio Amp Parts. Also I know it is a 5 volt tube and 14. Of course, there is a trade-off to using suppressors with a low Q at VHF. net 6 m Monoband Conversion for Heathkit SB-1000 Amplifier Convert this classic HF amplifier into a 6-m band work horse. Ameritron 3-500Z Replacement Power Tubes are available for all-purpose Amateur Radio service. Problems with the vacuum inside the tube are extremely rare. HENRY 2K-3 Kilowatt Linear Amp - Rebuild by me, "bear", WB2GCR. Features BAND COVERAGE 80 Meter, 40 Meter, 20 Meter, 15 Meter & 10 Meter (Modification required for U. If you want a decent box, get a single 1200A7 box. I have seen people use the same filament transformer and it may have decreased their output power as compared to what would be possible if the filaments were run at full voltage; but if you start out at 5. The Heathkit SB-220 HF amplfier and its pictorial kit assembly book is a good reference for the parts needed and typical construction. Fully welded and polished 14 gauge nickel and brass plated steel chassis support high quality custom built transformers. 2 Customer Reviews. Knowing the pin numbers of these tubes are sometimes important especially when your testing the tubes or working on an amplifier that they are installed in. The article focuses on one of the least likely 3-500Z failures, an internal open filament. Both tubes should be equal in redness brightness and the percentage of redness on both tube's plate surface should be equal to each other. I measured the voltage of mine and it was 5. - Answered by a verified Electronics Technician We use cookies to give you the best possible experience on our website. These heavy-duty, graphite-plate 3-500Zs are an updated version of the venerable vacuum tube that has been around for well over half a century. The amplifier features fast warm up and 1500-Watt RF output with 100-Watts of drive. Peck, W6SNO One-Band Kilowatt Amplifiers Using the 4-125, 4-250, and 4-400 in Kilowatt Amplifiers—. The authors SB-220 amplifier was purchased from the original owner in 1988. Heathkit saw the need for HF power amplifiers in the ham community soon after SSB became popular and produced a line of them. I spent alot of time and money (that I didn't have) on reconditioning this thing and still have a little while yet before it gets put into actual use. Tuning a grounded grid amplifier. All frequencies 305 to 30 MHz may be covered with some re- alteration of the input circuit. Features BAND COVERAGE 80 Meter, 40 Meter, 20 Meter, 15 Meter & 10 Meter (Modification required for U. cosmetically looks to be in very good. 10 channels completely preset and auto-tuned as operator makes selection. I recently hooked it back up to my IC-7610 for the heck of it, don't know why as I hardly ever transmit except for rare DX. (Some ancient amplifier tubes were barely capable of amplification at 28 MHz; the 203A used in the Collins 150B transmitter was rated for full anode input power only up to 15 MHz!) Amplifier tubes can oscillate, too. wild,fangのアイリスオーヤマ,加湿器,気化ハイブリッド式,イオン発生装置搭載,肌ナビ搭載,ゴールド,ark-500z-n:20190328064535-00592ならショッピング!ランキングや口コミも豊富なネット通販。更にお得なTポイントも!. I am going to make a wood base for it and I would also like to feed some current into it just to make it glow. The 3-500Z is rated at approx. 300 watts bird and 1000 peak will give you 10,000+ peak output Tube - 3CX3000 Tube used test full power output. Of course, this is an amp for Ham band use. These include the 811, 572B and the 3-500Z and are attractive as they simplify the amplifier design. Transmit/Receive switching 60 + Amps open Vacuum relay Power-line requirements 200/240 Vac 50/60 HZ 50+ or - Amps at 240 Vac Power Supply Heavy duty 3 peak amp steel core transformer and high capacitance. Henry 2K-3 RF Linear Amplifier All logos and trademarks in this site are property of their respective owner. They may be contacted at Triton Electron Technology Division, 3100 Charlotte Avenue, Easton, PA 18042. Shop with confidence. Transformers All in all, guitar amp transformers are robust and very reliable. Doing some internet research we found this is not an uncommon problem with the 3-500Z tube. When I bought the amp it was an older amp that had never been out of the box or used. Of course the 20K resistors would not matter when the 3-500Z was inserted, as all 3 non-filament pins are connected to the triode's grid. Features BAND COVERAGE 80 Meter, 40 Meter, 20 Meter, 15 Meter & 10 Meter (Modification required for U. Operation with zero grid bias simplifies associated circuitry by eliminating the bias supply. The R L DRAKE Model L—4B Linear Amplifier offers continuous 2000 watts PEP— SSB, and 1000 watt DC, C W, AM and RTTY operation covering the ham bands 80 through 10 meters. The filament-voltage is typically 5. HRO Discount Price: $1,649. Heathkit HL-2200 HF Linear Amplifier. The Henry is from the late 60's to 70's and is a floor amplifier. Prices subject to change. Buy the RICHARDSON ELECTRONICS 3-500Z online at Newark Canada. Created Date:. The Grid Current meter provides 500z tubes. Eimac SK-410 for 3-500Z Tube for Ham Radio Amplifier DIY Project NOS. This link is listed in our web site directory since Sunday Mar 31 2013, and till today "Testing the 3-500Z pins" has been followed for a total of 516 times. This amplifier can operate on either 110 or 220 volt house current. This 3-500 tube version has an anode dissipation of approximately 600W if additional air flow is provided. POWER SUPPLY REQUIREMENTS FOR THE “VK3NX” 50 MHz AMPLIFIER: Anode V: +1200V ( will operate from 600 – 1200) Anode I : up to ~ 500 mA for 3 tubes @ 1200 V. Compare Typeform to alternative Survey & Forms Building Tools. Connecting my Elecraft K3 to a Drake L-7 amp. If there is a dual 3-500Z amplifier that can top the HF-2000 in design, quality of construction, quality of components and quiet and rugged performance, this Ham has no knowledge of it. 4335 Steeles Ave. The taller 3-500Z will not fit into this amp without major cabinet modification. Net weight (2. Henry 2K-3 RF Linear Amplifier All logos and trademarks in this site are property of their respective owner. Ameritron AL-80A restoration project. Discontinued! Please check our Used List. Ideal for use with the Yaesu FT817 & FT897 and Icom 703, but suitable for. Heavy duty metal air socket. Only logged in customers who have purchased this product may leave a review. Just thought you'd all like to know that I have been getting GREAT AUDIO reports from running K3 #1717 on AM, into an AL811H amplifier driving the amp to about 125. should indicate 2. This makes tune up a questionable process, but with the forgiving nature of 3-500Z Eimacs I used the amp anyway. the handful of parts required to build the amp probably cost a mere several of hundred. These may be of interest to owners and users of this venerable and popular amplifier. What made it particularly attractive was that it not only had a pair of new, graphic 3-500Z tubes in (Chinese-made, but RF-Parts Inc. We sell Ameritron AL-811HDXCE with four 572B at Radioworld UK, for the best prices with great customer serivce and fast worldwide delivery. ithas on rollers mounted on. Found on Diagram: 48" (122 cm) Mower Dec. It covers 160 through 10 Meters. if its a tone control cap you will hear a very scratchy sound when turning certain controls in the preamp. Pictures of the 3-500Z Homebrew Linear Amp Eimac® 3-500Z tubes and chimneys Air blower (grey manifold behind tuning board) forces air under the chassis through a formed cavity to make the air come up around the base of the 3-500Z and through the chimneys. 2 Tube 3-500ZG 3Kw--. original filament transformer for the pair of 3-500Z's was 30 amps. There are no reviews yet. Octal Tube Socket Numbers. A pair of 3-500Z’s is a nice amplifier, can produce 1500 watts of output power if designed properly and can give you years of dependable service. So then I replaced the fuse again and recieved the same result; another blow out. amplifiers in the 1980's, were R. SILVER heavy duty contacts. Eimac 4-400A Grounded Grid RF Amplifier Collins 30K-1 Cabinet From 1947. Has strong pair of Eimac 3-500Z tubes. The following accessories should be included with your HL1000A amplifier: (a) Instruction Manual (b) Warranty Card (c) Shielded Control Cable. Αναρτήθηκε από G0MRF 476. So just to clarify, I have a new in box 1/2 built SB220 with the 3-500Z Eimac tubes still in original packing from 1985. For your security, you are about to be logged out. 格安即決,日本初の DXアンテナ デルカテック Hiアラーム3防犯受信警鳴部・主装置 SHA-500Z 【メール便無料】,DXアンテナ デルカテック Hiアラーム3防犯受信警鳴部・主装置 SHA-500Z - aromafreedom. But in time it changed. Used Ferris agriculture for sale in New York, USA. If there is a 3% increase above 5VAC, it will decrease the life of the tube by one half. The 3CX3000F7 amplifier photographed and described above has been operating flawlessly for three years on 80 and 40 meters. That in the Heathkit SB-1000, the Eimac tube went soft and the new RF parts tube does what the carton said. Zetagi B300P 20-30MHz 300w PEP. / The AL-80A is factory wired for 117V, 50/60 Hz primary line voltage. amplifiers in the 1980's, were R. This amplifier is in very good condition with no rust, or corrosion. so I drop in a pair of 3-500Z's. 600 watts HF amplifier, 10-160 metres, with 3 811 tubes AL-82 Amplifier The Ameritron AL-82 Linear Amplifier is designed to give you years of trouble free service at the full legal output power limit. Buy RICHARDSON ELECTRONICS 3-500Z online at Newark. At this voltage, the cathode would probably be worn out in 400 hours of operation - and this one was. For 9-Pin power tubes like the EL84 the plate is pin 7 and the cathode is pin 3. My trusty SB-221 amplifiers have dual 3-500Z tubes and are bulletproof contest units putting out a kilowatt all day long if I wish, but they don't do 160M or the WARC bands. So, I got permission from the station manager - my lovely wife Kim - to make a call and see if I could acquire the amplifier and spare tube. Find great deals on eBay for tube 3-500z and 3-500zg tube. 3 Tube 3-500Z Ham Amplifier Plate Supply Evaluation I mistakenly referred to the meter dropping resistors as diodes at 3:56*** This is an evaluation of a customers 3 tube 3-500Z Ham amplifier plate supply Enjoy!. The AL-811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW, RTTY, SSTV and AM operation. Operation with zero grid bias simplifiers assocated circuitry by eliminating the bias supply. AMPHF - AMP SUPPLY LK-550NTC This is the Amp supply 3-500z based amp that has THREE 3-500z tubes in it. In all cases, air flow rates in excess of the min irnum requirements will prolong tube life. About Testing the 3-500Z pins The resource is currently listed in dxzone. They are arranged in alpha-numeric order beginning with AAA and ending with 999. Heathkit HL-2200 HF Linear Amplifier. Woodwork City pizza of Sarasota 3 500z Amplifier Schematic Free bathroom medicine cabinet plans workbench plans using a door wood shop projects plans build my own home floor plans Canadian woodworker catalog how to decorate a rocking horse wood table finish options kayak storage building plans pergola building designs wooden playhouse plans free. The Tube Center is dedicated to providing Ham radio, amateur radio operators, antique radio enthusiasts, audio professionals and hobbyists the ability to choose from an inventory of over 3. RF Parts 3-500ZG easily represents the best value for the price. The 3-500Z is rated at approx. Four 572B tubes gives you more plate dissipation than a single 3-500Z tube. An 1800 watt continuous commercial rated Hypersil transformer is standard with heavy duty rectifiers in a full wave bridge supply with computer capacitors. In addition, grounded-grid operation is attractive since power gain as high as twenty can be obtained with. The authors SB-220 amplifier was purchased from the original owner in 1988. KENWOOD TL-922 (TL-922A, TL922) MODIFICATIONS With a feedback resistor. The problem also occurred in the Drake L-4B amps. Mundane devices we take for. Only at Sweetwater! FREE Shipping and FREE Tech Support for Groove Tubes Guitar Amp Accessories! Shop Sweetwater inSync SweetCare Events Careers Used Gear Marketplace (800) 222-4700 Talk to an expert!. Related Items. 10 channels completely preset and auto-tuned as operator makes selection. Buy RICHARDSON ELECTRONICS 3-500Z online at Newark. Currency - All prices are in AUD Currency - All prices are in AUD. Phone - 610 252-7331, FAX - 610 258-6279. The control grid ground is also the single most critical connection for stability. 3 Tube 3-500Z Ham Amplifier Plate Supply Evaluation I mistakenly referred to the meter dropping resistors as diodes at 3:56*** This is an evaluation of a customers 3 tube 3-500Z Ham amplifier plate supply Enjoy!. AMPHF - AMP SUPPLY LK-550NTC This is the Amp supply 3-500z based amp that has THREE 3-500z tubes in it. AA7JC Ken's Homebrew Page - Really nicely made tube transmitter project. It is capable of the maximum legal power input level, 1000 watts dc, and can develop up to 2000 watts peak input during ssb operation. These may be of interest to owners and users of this venerable and popular amplifier. a single 3CX1500D7 to replace two 3-500Z in many applications. I was hoping someone might know how to connect them together. This 3-500 tube version has an anode dissipation of approximately 600W if additional air flow is provided. Actually - The problems with the filaments of the 3-500z tubes were NOT confined to the SB220 amps vack in the 1960 and 70 era. can be used on a 3cpx1500a7 3cx3000a7 5000a7 gs35b 3cx10,000 and more! 6"H x 1"round For educational purposes only Phone: 773-431-4444. a continuous reading of grid current and indicates proper operation of the amplifier. Just recently I have been given a pair of 3-500Z transmitter tubes by a friend. search titles only has image posted today bundle duplicates include nearby areas cariboo, BC (cbo); comox valley, BC (cmx); kamloops, BC (kml). A 25 ohm low-L cathode feedback resistor will make a 3-500Z linear with 100W of drive. But in time it changed. I purchased this amp from the family of a silent key. Tuned input in the back of amplifier, 200w in=1800-1900 *ALL AMP VIDEOS FOR EDUCATIONAL INFORMATIVE PURPOSES ONLY*. 7-PIN DIN AMPLIFIER ACC Cable AC-02P for KENWOOD TS-590, 2000,430,870,940 etc - EUR 15,33. I replaced the 23 year old Eimac 3-500Z for an 3-500ZG from RF parts. On the 10-meter band, they reduce amplifier output by roughly 0. •Measures mod's and soft-start tubes last longer (x8) Amp Overview AEA LA-30 AMERITRON AL-80B • Both use single 3-500Z = 800 to 1000 Watts output • Two fine examples of "Desk top KW Amplifiers" • LA-30 older design sold to Heathkitthen AMERITRON. The Eimac 3-500z's are worth some money though, upwards of a couple hundred bucks. Currency - All prices are in AUD Currency - All prices are in AUD. RF drive is supplied to the amplifier by my Starpoint RF Channel Modem at a drive level of roughly 31 milliwatts @ 50 Ohms. Doing some internet research we found this is not an uncommon problem with the 3-500Z tube. If we examine the anode characteristics, Vakmin is somewhere in the range 300-500V, lets assume 400V. A One-Kilowatt Amplifier Using a 3-500Z 183 Ml RFCI CAPACITOR BANK R5 UI FAN Top view. If you Run a single 3-500 amp at 1000w pep you will not run it for long. And the answer - because that is what we have available. The solder would literally melt out of the filament pins on the tube. I thought about robbing it for parts to build a big audio amp, but another friend saw it, and wanted to put it back on the air, so I gave it to him. Thanks for looking, dave please ask any questions before bidding has been soldered to and the other appears to have never been used. txt) or read online for free. 3-500Z is a direct thermal carbonization thorium—tungsten cathode, glass triode, the anode cooling method is natural cooling, the maximum anode power dissipation is 500W, the maximum operating frequency is 110MHz, the output power is 850W. Should I >just stick any 2 in a amp or do they need to be a matched set. The filament voltage was over 5. >3-500's but there is still another type. Offered along with this series of R. A custom 12AX7 switching box was constructed to allow for a quick switch comparison of six tubes at a time while plugged into the V1 socket of a Marshall JCM800 2203 guitar amplifier. High-Mu Power Triode EIMAC 3-500Z is a compact power triode intended to be used as a zero-bias class AB2 amplifier in audio or radio-frequency applications. The Grid Current meter provides 500z tubes. accessories:. It's time to do some much-needed maintenance on my SB-220, so I've decided to replace the original tubes which are definitely soft. The problem also occurred in the Drake L-4B amps. He cross swapped tubes in the sockets and had the same problem with the same tube - so we believe the sockets are not the problem. Phone - 610 252-7331, FAX - 610 258-6279. Screen V: 250-350 V The more the better up to 350 V max. Connecting my Elecraft K3 to a Drake L-7 amp. [Amps] Replacing 3-500Z tubes with 4-400A tubes, John King Re: [Amps] Replacing 3-500Z tubes with 4-400A tubes , Carl Re: [Amps] Replacing 3-500Z tubes with 4-400A tubes , Bill Fuqua. This link is listed in our web site directory since Sunday Mar 31 2013, and till today "Testing the 3-500Z pins" has been followed for a total of 516 times. Despite all the travelling I've undergone in June, I still managed to put in very good volume. help UPGRADE SERIES OF AKASO EK7000: Featuring 4K/24fps, 2K/30fps and 1080P/60FPS video resolution and 20MP photos, AKASO Brave 4 action camera enables you to take incredible photos and ultra HD videos, clearly recording the beauty and wonders in life!;. According to Eimac®, each 3% increase in filament-voltage, above what is needed to achieve full power. Pictures of the 3-500Z Homebrew Linear Amp Eimac® 3-500Z tubes and chimneys Air blower (grey manifold behind tuning board) forces air under the chassis through a formed cavity to make the air come up around the base of the 3-500Z and through the chimneys. On SSB, this produces distortion and splatter. I was advised by a fellow ham who inspected the inside that the caps had been upgraded a. While the 3-500Z is a great tube for grounded grid service, they aren't in much demand by the commercial broadcast industry that generally uses tubes of that size in a grid driven configuration. The 3-500Z triode tube is shipped separately and must be installed before operating amplifier in any way. Octal Tube Socket Numbers. If that box isn't big enough, get a 3CX3000. This was big restoration project. The Amplifier unit contains 3 sections: The power supply (HV transformers, fillament transformers, etc), a 100w CW RF source, and the main RF deck. The problem also occurred in the Drake L-4B amps. Shop with confidence. The power supply is built into the amplifier which fits easily on a desk-top. On the 10-meter band, they reduce amplifier output by roughly 0. That in the Heathkit SB-1000, the Eimac tube went soft and the new RF parts tube does what the carton said. 3-500Z is now produced by Triton Services, Inc of Dunkirk, MD USA. Check the amplifier plate current meter at the upper right hand corner of the front panel to verify that the OOZ tubes are drawing current. C2/L1/C3 dominate the high frequency energy storage. These sockets are removed from commercial equipment and had few operating hours. Phone - 610 252-7331, FAX - 610 258-6279. Grounded grid linear power amplifier for 80 to 15 meters HAM bands. Heathkit SB-220. Shape Tablemodel, with any shape - general. Check Stock, Availability, and view Datasheets at Newark Canada - an authorized RICHARDSON ELECTRONICS supplier. Currency - All prices are in AUD Currency - All prices are in AUD. June results Month still went ok. Only at Sweetwater! FREE Shipping and FREE Tech Support for Groove Tubes Guitar Amp Accessories! Shop Sweetwater inSync SweetCare Events Careers Used Gear Marketplace (800) 222-4700 Talk to an expert!. Why Should I Match My Tubes? For a more technical explanation of why we match tubes, click here Power tubes are electrically matched so each tube will have the same amount of "idle" plate current and amplification characteristics when used in an amplifier. Of course, there is a trade-off to using suppressors with a low Q at VHF. L 14 13 SWR L13 RYI CSOA-B R 104. Figure 3 shows an inside view of the ampli-. [Amps] Replacing 3-500Z tubes with 4-400A tubes, John King Re: [Amps] Replacing 3-500Z tubes with 4-400A tubes , Carl Re: [Amps] Replacing 3-500Z tubes with 4-400A tubes , Bill Fuqua. I just got a good deal on a very clean Drake L-7 amp (2- 3-500Z tubes). Swapping tubes before their time is a fruitless exercise unless it’s done to change the amp’s voice. switch, whose positions are: 1 — Off. The amplifier is from a non-smoking ham shack. Αναρτήθηκε από G0MRF 476. Currency - All prices are in AUD Currency - All prices are in AUD. One of the 3-500z experienced with "flash over" problem recently. Ameritron 3-500Z Replacement Power Tubes are available for all-purpose Amateur Radio service. Radwell also repairs AMPEREX 3-500Z. Consequently, one of the major consumers of triodes such as the 3-500Z are amateurs. On hitting T it is first set up as a high efficiency Class-C, grounded-cathode amplifier. Found on Diagram: 48" (122 cm) Mower Dec. The HL-2000 (later became the HL-2000A) using two 3-500Z tubes. This is a new addition to my shack, I have cleaned it up, it was rather dusty, after a 2 hour warm-up to reform the capacitors and heat the tubes I applied RF and it is working well! Below are a few photos of the inside of the amplifier. KENWOOD TL-922 LINEAR AMPLIFIER. Review (mpn:3-500z for sale) Radio 4-400 Tube Ham 3-500z Vintage Amplifier Transmitter Sockets National. Loudspeaker - - No sound reproduction output. Despite all the travelling I've undergone in June, I still managed to put in very good volume. Measuring only 3. The problem also occurred in the Drake L-4B amps. Both tubes should be equal in redness brightness and the percentage of redness on both tube's plate surface should be equal to each other. the amp features two meters for maximum operating convenience. I am very impressed with the RF power the tube can deliver to the output. •Replacement 3-500Z tubes = $250 each. In all cases, air flow rates in excess of the min irnum requirements will prolong tube life. In addition, I removed all the bypass capacitors and chokes that connected the 3-500Z grids to ground and firmly grounded them with. AMERITRON AL-80B Linear Amplifier Single 3-500Z HF 1000 Watts PEP 110 or 220 Volts. This 3-500 tube version has an anode dissipation of approximately 600W if additional air flow is provided. Here's the kick in the butt that hit the Amateur Radio Amplifier Owners, the 3-500Z or G tubes used to sell for $50. But for now just think of it this way - we went to the junk box to see what we could find. sayer, WA6BAN 5—AMPLIFIER CONSTRUCTION An 811 A 200-Watt Grounded-Grid Linear Amplifier. The tubes seem to be real rugged, and dont warm up like the old Eimac 3-500z's. Arrow points to the insertion index notch. Henry Radio Inc. The grid connection to ground should always be as wide and short as possible, and use as many pins as possible. The 3CX3000F7 amplifier photographed and described above has been operating flawlessly for three years on 80 and 40 meters. 運転切替ボタンの自動ボタンで3段階(おまかせ?静音?うるおい)のモード切り替えができ、連続ボタンでは強?弱の切り替えができます。 エコモードにするとヒーターによる加熱を停止し自然気化式で加湿を行います。. eimac 3-500z: $145. com Web Site Design Hi Fi Audio, as far back as I can remember, has been my passion. Operation with zero grid bias simplifies associated circuitry by eliminating the bias. High Power tubes. Compare Typeform to alternative Survey & Forms Building Tools. 10 channels completely preset and auto-tuned as operator makes selection. KENWOOD TL-922 (TL-922A, TL922) MODIFICATIONS With a feedback resistor. Ameritron`s Dual 3-500Z Amplifier The Ameritron AL-82 Linear Amplifier is designed to give you years of trouble free service at the full legal output power limit. This is an EXCELLENT example of a Kenwood TL-922 Amplifier. The older Eimac does okay but doesn't tune up as well as the new one. Offered along with this series of R. Dick Stevens, WIQWJ, designed and built this project. The 3-500Z/8802 is primarily used in broadcast applications. first, if ya gotta askand second, running that in ABSOLUTELY no way compares to running a 3-500z base amp. I sent the amp down to Bill at Omega Electronics to have a vacuum relay QSK circiut and a step start added. A pair of fresh 3-500z and some patience could probably put it back on the air again one day. 5pin 3-500z 4-400 U5g Base Ceramic Tube Socket Audio Amplifier Part , Find Complete Details about 5pin 3-500z 4-400 U5g Base Ceramic Tube Socket Audio Amplifier Part,Tube Socket,3-500z Tube Socket,5 Pin U5g Ceramic Tube Socket from Plugs & Sockets Supplier or Manufacturer-Shenzhen Hanlongjia Technology Co. This link is listed in our web site directory since Sunday Mar 31 2013, and till today "Testing the 3-500Z pins" has been followed for a total of 516 times. AMERITRON mounts the 572B tubes vertically, not horizontally, to prevent hot tube elements from sagging and shorting out. | Old Henry Amplifiers. True, it would be preferable to employ say a 3-500Z, which in many respects is an equivalent triode. Description. Two Illuminated Panel Meters: the AL-82 has two il- 1. Other Ham radio tubes. 69 in-depth Typeform reviews and ratings of pros/cons, pricing, features and more. 2 OPERATING LOCATION The amplifier must be located in an open area such that the flow of air from the top is unrestricted. New w arranty: Greenstone 1 year. 3-500Z Amplifier Project - This article loaded with nice pictures and schematics, describes a 160-10 meter linear amplifier that uses a pair of 3-500Z triode power tubes. If that box isn't big enough, get a 3CX3000. On SSB, this produces distortion and splatter. Every time I turn it on a pop sound was coming out the speakers. 3-500Z 3-500Z 3-500z tube IL60147 amperex transmitting "Power Triode" amperex amperex aml9-1 500w class d amplifier 500w class d audio amplifier GAS TRIODE: 2014 - Linear Amplifier. A good pair of matched 3-500Z tubes with HV around 3600-3800 plate volts and 220-240 Ma grid current, you should get about 1200-1400 RF output into a dummy load/antenna. Many hams like the challenging of hunting for parts to build a high quality amplifier out of inexpensive surplus parts. The tubes seem to be real rugged, and dont warm up like the old Eimac 3-500z's. A low cost 600 watt ultra-linear amplifier. the first thing i do is replace all the caps and diodes and resistors in the power supply and any caps in the amp. He cross swapped tubes in the sockets and had the same problem with the same tube - so we believe the sockets are not the problem. 3 Tube 3-500Z Ham Amplifier Plate Supply Evaluation I mistakenly referred to the meter dropping resistors as diodes at 3:56*** This is an evaluation of a customers 3 tube 3-500Z Ham amplifier plate supply Enjoy!. Hey guys, my son has an Drake L4 Linear Amplifier. The anode Of the 3-500Z operates at a visibly red color at its maximum rated dissipation of 500 watts. of Eimac 3-500Z glass triodes specifically de-signed for improved grounded-grid linear op-eration.