HF Amplifiers

Amateur linear amplifiers

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    • SUPERVOX - S 300 - AM CW SSB linear amplifier for 160 80 and 40 meter band
      [ Hits: 3089 | Votes: 2 | Rating: 5.50 ]
    • 1.5 to 30 Mhz RF Amplifier  pop - This high range amplifier is very small [SB200 size] Vacuum variable input and output caps as well input and output switching.
      [ Hits: 52119 | Votes: 41 | Rating: 3.77 ]
    • 1.5KW GU-43B HF Linear - by PA0FRI, 1.8 - 30 MHz, Input 50 ohm SWR <1.2:1
      [ Hits: 5590 | Votes: 13 | Rating: 5.38 ]
    • 10 11 meters RF Power Amplifier - AM/FM/CW QRP RF Power Amplifier for the HF 10 or 11 meterband (28MHz/27MHz)
      [ Hits: 4786 | Votes: 6 | Rating: 5.67 ]
    • 10 W Linear Amplifier - This article describes a 10 watt linear amplifier that is capable of delivering over 15 watts into 50 ohms and uses cheap plastic transistors that are used in CB equipment. by Harry Lythall - SM0VPO
      [ Hits: 10951 | Votes: 11 | Rating: 5.27 ]
    • 100W HF QRO linear amplifier - Based on Motorola MRF454, schematics and component list
      [ Hits: 8583 | Votes: 11 | Rating: 4.36 ]
    • 10m FM Amplifier - 100 W output RF amplifier for 10 meter band project by W4NFR
      [ Hits: 574 | Votes: 3 | Rating: 5.67 ]
    • 11 KW Linear amplifier by I0JX  pop - Use 4CX10000D / 8171, RF output power of 11 KW in key-down carrier on all bands. Power was measured with a Bird 4712 wattmeter and a 25 KW slug
      [ Hits: 23499 | Votes: 28 | Rating: 7.79 ]
    • 1500 Watt Solid State HF Amplifier - This is a project to develop an Open Source reference design for a 1500 watt solid state linear amplifier for 10 through 160 meters by K6IF
      [ Hits: 9093 | Votes: 17 | Rating: 3.29 ]
    • 160m linear amplifier - pictures - Pictures of a homemade monoband linear amplifier for 160m band powered by 3 x QB5/1750
      [ Hits: 234 | Votes: 2 | Rating: 2.00 ]
    • 2 kW HF Amplifier Rebuild - Heathkit SB-220 amplifier repaired at W8UM
      [ Hits: 7231 | Votes: 6 | Rating: 5.17 ]
    • 2 x 3-500Z HF Power Amp - A 2x3-500Z rf power amplifier for 80-10 meters
      [ Hits: 4103 | Votes: 6 | Rating: 3.17 ]
    • 2 x 4-400A Amplifier Deck - A Class C Amplifier rebuilt with 4-400A tubes by W7IUV
      [ Hits: 2824 | Votes: 3 | Rating: 5.00 ]
    • 24 MOSFET Class E RF Amplifier - This is a 24 MOSFET Class E RF Amplifier, covering the 80 and 160 meter amateur radio bands.
      [ Hits: 1543 | Votes: 2 | Rating: 4.50 ]
    • 3 x 4-400A project - An RF amplifier project by W7IUV
      [ Hits: 2182 | Votes: 2 | Rating: 10.00 ]
    • 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. It was designed and constructed by William Moneysmith, W4NFR. The amplifier features fast warm up and 1500-Watt RF output with 100-Watts of drive.
      [ Hits: 820 | Votes: 3 | Rating: 9.33 ]
    • 4 KW RF Amplifier - HF power amplifier project powered by GU-78B by SV8JE
      [ Hits: 1094 | Votes: 1 | Rating: 10.00 ]
    • 4 x 813's RF Amplifier Deck - This amp project was an exercise in cheap! The design criteria was to use only components in the JUNQUE BOX
      [ Hits: 11901 | Votes: 19 | Rating: 5.47 ]
    • 4-1000A Homebrew HF Amp - Building an HF power amplifier based on a 4-1000A
      [ Hits: 792 | Votes: 3 | Rating: 8.67 ]
    • 4-1000A Tube RF Amplifier - Home Brew a 4-1000A RF power amplifier project by W4NFR
      [ Hits: 474 | Votes: 0 | Rating: 0.00 ]
    • 40m linear amlifier made by 9A6A - Pictures of a monoband linear amplifier for 40m band 2 x QB5/1750 made by 9A6A
      [ Hits: 591 | Votes: 1 | Rating: 10.00 ]
    • 4CX1500 - This is a 4CX1500B grid driven amplifier that is built like a tank. The unit is considerably over designed as can be seen in the pictures documenting the construction
      [ Hits: 10826 | Votes: 10 | Rating: 5.80 ]
    • 5-band RF Power Amplifier - This project uses a widely available IRF510 MOSFET, work on HF 80, 40, 30, 20 and 17 meter bands
      [ Hits: 6604 | Votes: 4 | Rating: 6.75 ]
    • 500 WATT PA by SM0VPO  pop - 500W Power Amplifier by Harry Lythall - SM0VPO
      [ Hits: 18134 | Votes: 18 | Rating: 5.38 ]
    • 60 W Linear Amplifier Circuit - The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840.
      [ Hits: 1858 | Votes: 3 | Rating: 3.67 ]
    • 600 Watt HF Amplifier  pop - Schematics plans by K9GDT and all infos to build a 600 Watt HF Amplifier. The amplifier uses four Motorola MRF150 50 volt TMOS power FETs configured in push-pull/parallel and biased for class AB linear operation.
      [ Hits: 68483 | Votes: 120 | Rating: 4.44 ]
    • 7 Watt HF Amplifier - An RF power amplifier, providing 7 Watts output in HF bands, schematic by ON6MU
      [ Hits: 3130 | Votes: 2 | Rating: 5.50 ]
    • 70W SSB Power Amplifier For FT-817 or KX3 - DIY kits a 70W SSB linear Power Amplifier for YAESU FT-817 KX3 running HF 80m-10m bands
      [ Hits: 858 | Votes: 6 | Rating: 6.67 ]
    • 80 m Hexfet power amplifier - 80m hexfet power amplifier by W7ZOI
      [ Hits: 3424 | Votes: 3 | Rating: 7.67 ]
    • 80-10m Linear Amplifier - High-power 3-500 HF linear amplifier by Don Pinnock G3HVA
      [ Hits: 2765 | Votes: 2 | Rating: 9.00 ]
    • 811 Linear Amplifier project - A lower power desktop linear with integrated 120vac power supply. This, very compact, dual 811 version will deliver about 300 watts output. Covers all bands including WARC bands.
      [ Hits: 1320 | Votes: 2 | Rating: 10.00 ]
    • A 20m monoband Power Amp - The 20m monoband 4-1000 amplifier, by Jelmer (pa5r), Herman (pa0ten) and Frans (pa5ca)
      [ Hits: 2677 | Votes: 2 | Rating: 9.50 ]
    • A 600 Watt homebrew Solid State Amplifier - A solid state linear based on EB104 Motorola Engineering Bulletin by Helge Granberg. It uses 4 MRF150 FETs in push-pull parallel to acheive 600 Watts from about 6 Watts drive
      [ Hits: 1657 | Votes: 2 | Rating: 3.00 ]
    • A GS-35B Amp For HF - The Show and Tell amp, a GS-35B RF power amplifier for HF being built by W4ZT
      [ Hits: 2688 | Votes: 1 | Rating: 10.00 ]
    • A LF power amplifier - A Low Frequency (LF) RF Power Amplifier by VK5BR it operates in a linear mode and can handle CW, AM and SSB.
      [ Hits: 3059 | Votes: 1 | Rating: 1.00 ]
    • A low cost 600 watt ultra-linear amplifier  pop - This compact little amplifier is the brain-child of Pat Murdoch, ZL1AXB, in Auckland, New Zealand. It is only 11" wide, 4" high, and 9" deep. Operates for 40, 20, 17, 15, 12, and 10m
      [ Hits: 29612 | Votes: 22 | Rating: 6.55 ]
    • A simple 50W RF Power Amplifier - A simple RF power amplifier initially designed for 40 meter band can work on 10 15 20 40 80 meters
      [ Hits: 1016 | Votes: 1 | Rating: 8.00 ]
    • Adding 160M to HF amplifiers - updated original manuscript, article published in January 1989 QST by Richard L. Measures, AG6K, April 1988
      [ Hits: 3017 | Votes: 1 | Rating: 10.00 ]
    • AL80B Mod - Ameritron QSK 5 PC mod for AL80B
      [ Hits: 565 | Votes: 0 | Rating: 0.00 ]
    • AL811 trouble shooting - Ameritron AL80B AL811H AL572 Amplifier Trouble Shooting. Tubes replacement, resistor changes.
      [ Hits: 913 | Votes: 3 | Rating: 9.67 ]
    • Alpha Amplifier Upgrades - Alpha 77D,DX,SX, Alpha 76, Alpha 78 and 374 repair service and upgrade kits
      [ Hits: 2488 | Votes: 6 | Rating: 10.00 ]
    • Ameritron AL-1200 to gs35b Conversion - The Ameritron AL-1200 Amplifier is in current production. In its factory configuration it uses a single 3CX1200A7 (triode) tube, grounded grid configuration. Re-tubing the AL-1200 with a GS-35b with success.
      [ Hits: 2447 | Votes: 2 | Rating: 4.00 ]
    • Ameritron AL-80A modification - W7TDC modification of the Ameritron AL-80A power amplifier
      [ Hits: 10340 | Votes: 17 | Rating: 7.06 ]
    • Amplifier for 15 and 17 meter band - The two linear amplifiers are ment for use with QRP SSB/CW/FM/AM transmitters on the amateur bands 15 and 17 meters can be powered from a 12 volt DC supply by ON6MU
      [ Hits: 1465 | Votes: 0 | Rating: 0.00 ]
    • Broadband Power Amplifier - A MRF141G 3-175MHz Broadband Power Amplifier DL4MEA 02/1998
      [ Hits: 1802 | Votes: 0 | Rating: 0.00 ]

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