HF Amplifiers

600 Watt HF Amplifier - Schematics plans by K9GDT and all infos to build a 600 Watt HF Amplifier

1.5 to 30 Mhz RF Amplifier - This high range amplifier is very small [SB200 size] Vacuum variable input and output caps as well input and output switching.

How modify a CB linear to use in HF band - how to modify a Cb linear amplifier to use in HAm HF band

A low cost 600 watt ultra-linear amplifier - 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

SP5GJN - HF Power Amplifiers - HF home meade power amplifiers by SP5GJN

11 KW Linear amplifier by I0JX - 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

Build an HF Linear Amp - Hombrew project to build an HF linear amplifier whose output is 210W for 16W of drive on 80M and max output is 300W.

Easy Kilowatt Linear Amplifier - Rf amplifier for hf ham radio service - includes easy to understand designs and penny-cheap construction details

500 WATT PA by SM0VPO - 500W Power Amplifier by Harry Lythall - SM0VPO

MOSFET amplifier for 80 mt. - Picture index of 150W MOSFET linear amplifier for 80m 1996, includes photos and schematics

Homebrew 813 Linear Amplifier - 813 Linear Amplifier Project includes many schematics, drawind and assembling construction

G3YXM 500 W solid state amplifier - HF 500 Watt power amplifier schematics by G3YXM

QRP Amplifier - HF Bands QRP linear amplifier by SM0VPO

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

Yaesu VL-1000 amplifier - The Yaesu VL-1000 Quadra HF Linear amplifier

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

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

Ameritron AL-80A modification - W7TDC modification of the Ameritron AL-80A power amplifier

N4IP HF and 6 Meters amplifier - A solid state amplifier for HF and 6 meters band by N4IP

100W HF QRO linear amplifier - Based on Motorola MRF454, schematics and component list

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

2 kW HF Amplifier Rebuild - Heathkit SB-220 amplifier repaired at W8UM

4-1000A Project HF Amplifier - An 80-10 meter band switchable HF amp using a 4-1000A

HF Amp Project  ^new - This is the HF Packer amplifier project. KG9E was able to build this amp and put it on the air in about 25 hours.

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.

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

500 WATT PA by SM0VPO  ^pop - 500W Power Amplifier by Harry Lythall - SM0VPO

600 Watt HF Amplifier  ^pop - Schematics plans by K9GDT and all infos to build a 600 Watt HF Amplifier

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

Build an HF Linear Amp  ^pop - Hombrew project to build an HF linear amplifier whose output is 210W for 16W of drive on 80M and max output is 300W.

Easy Kilowatt Linear Amplifier  ^pop - Rf amplifier for hf ham radio service - includes easy to understand designs and penny-cheap construction details

How modify a CB linear to use in HF band  ^pop - how to modify a Cb linear amplifier to use in HAm HF band

MOSFET amplifier for 80 mt.  ^pop - Picture index of 150W MOSFET linear amplifier for 80m 1996, includes photos and schematics

SP5GJN - HF Power Amplifiers  ^pop - HF home meade power amplifiers by SP5GJN

SUPERVOX - S 300 - AM CW SSB linear amplifier for 160 80 and 40 meter band

1.5KW GU-43B HF Linear - by PA0FRI, 1.8 - 30 MHz, Input 50 ohm SWR <1.2:1

10 11 meters RF Power Amplifier - AM/FM/CW QRP RF Power Amplifier for the HF 10 or 11 meterband (28MHz/27MHz)

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

100W HF QRO linear amplifier - Based on Motorola MRF454, schematics and component list

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

2 kW HF Amplifier Rebuild - Heathkit SB-220 amplifier repaired at W8UM

2 x 3-500Z HF Power Amp - A 2x3-500Z rf power amplifier for 80-10 meters

2 x 4-400A Amplifier Deck - A Class C Amplifier rebuilt with 4-400A tubes by W7IUV

24 MOSFET Class E RF Amplifier - This is a 24 MOSFET Class E RF Amplifier, covering the 80 and 160 meter amateur radio bands.

3 x 4-400A project - An RF amplifier project by W7IUV

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

4-1000A Homebrew HF Amp - Building an HF power amplifier based on a 4-1000A

4-1000A Project HF Amplifier - An 80-10 meter band switchable HF amp using a 4-1000A

4-1000A Tube RF Amplifier - Home Brew a 4-1000A RF power amplifier project by W4NFR

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

5-band RF Power Amplifier - This project uses a widely available IRF510 MOSFET, work on HF 80, 40, 30, 20 and 17 meter bands

60 W Linear Amplifier Circuit - The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840.

7 Watt HF Amplifier - An RF power amplifier, providing 7 Watts output in HF bands, schematic by ON6MU

80 m Hexfet power amplifier - 80m hexfet power amplifier by W7ZOI

80-10m Linear Amplifier - High-power 3-500 HF linear amplifier by Don Pinnock G3HVA

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.

A 20m monoband Power Amp - The 20m monoband 4-1000 amplifier, by Jelmer (pa5r), Herman (pa0ten) and Frans (pa5ca)

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

A GS-35B Amp For HF - The Show and Tell amp, a GS-35B RF power amplifier for HF being built by W4ZT

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.

Acom 1000 Mod - This modification to the Acom 1000 is to add an additional Fan to the Amplifier.

Adding 160 meters to the Heathkit SB-220 - There will be radical changes to this Heathlit SB-220. There will be the addition of 160 meters along with many other circuit and design changes.

Adding 160M to HF amplifiers - updated original manuscript, article published in January 1989 QST by Richard L. Measures, AG6K, April 1988

AL-811 Modification - Ametiron AL 811 mod with pictures

AL80B Mod - Ameritron QSK 5 PC mod for AL80B

Alpha Amplifier Upgrades - Alpha 77D,DX,SX, Alpha 76, Alpha 78 and 374 repair service and upgrade kits

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.

Ameritron AL-80A modification - W7TDC modification of the Ameritron AL-80A power amplifier

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

Broadband Power Amplifier - A MRF141G 3-175MHz Broadband Power Amplifier DL4MEA 02/1998

COLLINS 30L-1 HF Linear Amplifier - The Collins 30L-1 Linear Amplifier has 1000 watts PEP power input on SSB and 1000 watts average on CW on all bands. It can be driven by the Collins 32S-3 Transmitter Collins KWM-2 or KWM-1 Transceiver, or most 70-100 watt exciters.

Converting the Amp Supply LK-500NT - A technician's nightmare. The NT or No Tune amplifiers from Amp Supply were the abomination of the amplifier world. The only way that I know of to repair these amplifiers is to clean out the mickey mo

Dentron Clipperton L linear Modification for 160m - Modifying Dentron Clipperton L linear for better Top Band operation