W6pql 2m Amplifier, Construction and Setup W6PQL 2m 1. Jul

W6pql 2m Amplifier, Construction and Setup W6PQL 2m 1. Jul 29, 2023 · I’ve recently upgraded the Amplifier for our 2m EME station to one that can provide full-duty cycle operation at 1500 watts. insertion loss < . Are any of the mains-powered higher power amplifiers (500w+) out there designed to operate from QRP power? I note that most of the mains-powered amplifiers require a power It had the article which ultimately won that month’s Cover Plaque Award, “Solid State 1 kW Linear Amplifier for 2 Meters,” by a very special person who has mentored me through much of the project: Jim Klitzing, W6PQL. It can accommodate almost any driving radio, and only requires 2 to 3w drive for 1kw out 1 KW 6 Meter LDMOS Amplifier 2 Meter 80W All Mode Amplifier 1 KW 2M LDMOS Amplifier 1 KW 222 MHz LDMOS Amplifier 500w 70cm Amplifier 1KW 70cm LDMOS Amplifier A Big Power Supply for SSPAs Low Pass Filter/Dual Directional Detector Sampling RF Power LED Bar Graph Meter Amplifier Control Board LNAs (preamps) and MMICs LNA Sequencing and Protection Manager Reviews Home Reviews For: W6PQL 2 Meter Kilowatt Linear Amplifier Category: Amplifiers: RF Power - 6M/VHF/UHF+ eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. With 40V on the LDMOS FET drains and about 2W of drive it produced 800W of RF output. Notes on the construction and operation of a multi-op Amateur Radio Station 2 Meter KW Amplifier Kit Assembly Instructions (rev 4c PC board) I re-designed the original board to minimize unused copper areas, as these spots must contain many vias to ground them to the opposite side to keep them 'quiet'. While building the kilowatt 2 meter LDMOS amplifier, I thought it would be nice to add a couple of extra functions I usually didn't include in my own amplifiersa high-temperature lockout in case the amp ever gets too hot, as well as a way to block RF drive while the antenna relay (s) switch over (this protects the input A Design Evolves The original work on the 2 meter amplifier core was developed and written up in the April 2010 issue of DUBUS magazine by Lionel Mongin, FIJRD, and much informa- 'Notes appear on page 36. I wanted to explore how water cooling actually worked. Measurements show 1. Aug 7, 2025 · eHam. This amplifier was used for 2m EME from American Samoa as KH8/ZL1RS on 2m EME in July 2014. It had the article which ultimately won that month’s Cover Plaque Award, “Solid State 1 kW Linear Amplifier for 2 Meters,” by a very special person who has mentored me through much of the project: Jim Klitzing, W6PQL. The RF deck combines I’ve had great experiences with Jim Klitzing, W6PQL’s amplifiers in our station so I contacted Jim to build a new 2m amplifier for our EME station. com/EA3AXV-1. Pressing 144 again will move you to the next register, and perhaps on 2 METER KILOWATT LINEAR AMPLIFIER Antenna 1. The document outlines design considerations, components, and You are going to have to set the shift and width with every band you go to with wsjt-x, but only the first time around. The input attenuator is now -3 dB, not -10 dB as shown above. I currently have an RM Italy HLA-150V and a HLA-300V that I can use with my IC-705 at home which has a maximum power output of 10 watts. This produces a 250 Watt amplifier and has a strip line inductor to match the output. html Manager Reviews Home Reviews For: W6PQL 2 Meter Kilowatt Linear Amplifier Category: Amplifiers: RF Power - 6M/VHF/UHF+ eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. com/1_kw_2m_ldmos_amplifier. Uses a single 50v LDMOS transistor made by Freescale Semiconductor, the MRFE6VP61K25H. QRP operation can be fun, but if you're like me, you probably have the occasional need for a bit more power. With as little as 2 watts in you can have over 1000 watts out. Lightly used and in excellent condition. nd2x. 2m Projects - Amplifiers 1 KW 2M LDMOS Amplifier by W6PQL http://www. I obtained a copper spreader block from another ZL Ham, and bought the RF device from one of the well recognised electronics parts suppliers. W6PQL: Solid State 1 kW Linear Amplifier for 2 Meters (article in QST Oct. It discusses amplifier designs for bands including 2m, 222MHz, 70cm, and 6m, listing critical components. driving radios, rear panel jumpers are included to select low power drive levels or, for up to 50 W drive, using a built-in 50 W, 10 dB A 600 Watt homebrew Solid State Amplifier and Power Supply Amplifiers are a favourite homebrew project. I built this using all the pre-built PCBs and RF deck available from W6PQL. 00"). 05db @ 144 MHz. 8-54 MHz It's been a while since I built an amp for HF; I'd have to go back to the 60's and a pair of the venerable 3-500z tubes that I put together back then. net is a Web site dedicated to ham radio (amateur radio). Comments? email to This one is similar in size and function to the 2m and 222MHz KW amplifiers. The expeditions provided sixteen of K5FF's one hundred countries (first DXCC 6 meters). A legal-limit version was also builta few photos of it are near the end of this article. Time to upgrade, so I built this one. Description. Return loss > 25db. This document provides a tutorial on building solid state kilowatt amplifiers using modern LDMOS transistors to annoy neighbors. Requires an external 50 volt power supply capable of 30 amps. I've modified the SSPA bias circuit slightly as shown below: Below is a block diagram showing how the different units are connected in the SSPA: SSPA block diagram. There are some small differences in appearance; the front panel was machined and engraved for me by Front Panel Express, and though it doesn't quite match (in color) the other kw amps in the station, it's quite close. Attenuation > 18db @ 288 MHz, and > 30 db @ 432 MHz. board W6PQL Solid State 800W+ 2m Power Amplifier Built from W6PQL's 2 Meter Kilowatt RF Deck Kit (scroll down to "Basic kit without copper spreader or LDMOS, $150. Inductors are 2t #14 solid, space-wound, 11/32" diameter, and 4t, 5/16 dia. 5 Kw Linear Amplifier Interior View Comments? email to This is the Swiss Army Knife of control boards. Lately I've been experimenting with WSJT-X and WSJT 10. These instructions can be found under the "Current Projects" link on the left. This was part of an EME rig set up on a temporary basis for a few days at a time. ARDUINO Solid State LDMOS PA controller to solder the LDMOS to the copper heatspreader (see W6PQL instructions, using ordinary solder wire but you need to heat up till 220-230°C, beyond NXP's 'survival' specs!). 1 He described a Class AB amplifier that used a Freescale MRFE6VP61K25HR6 power FET with characteristics I was looking for Mar 17, 2025 · eHam. Manager Reviews Home Reviews For: W6PQL HF Amplifiers Category: Amplifiers: RF Power - HF & HF+6M eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. A 1 KW SSPA for 1. W6PQL: 2 Meter KW Amplifier Kit Assembly Instructions Description I've modified the SSPA bias circuit slightly as shown A 1 KW SSPA for 1. The internal wiring and assembly is professional quality With the exception of the amplifier pallet itself, the interiors of both amplifiers look very similar so I've only included pictures from the 2 meter one. Jimmy has done over seventy 6/2 meter expeditions to over fifty countries. I however used MECHANIC XGS40 Special Liquid SolderPaste 158°C , which is developed for delicate SMD components, melts already at 200°C and offers excellent wetting (ensuring a . Internal fans, swr protection, alc circuit and LNA switching. 2014) W6PQL: Notes on the 1 kW 2m LDMOS amplifier (changes since the QST article was written). For example, to change the current band stack register for 144, you just press band, then 144. Total days used less than 30. Feb 13, 2024 · One for the chasers, or folk who use their QRP transceivers with an amplifier at home. However, here is the 6 meter amplifier pallet so you can see the differences: You may click on any image for a larger view Here are the main boards mounted on the heatsink. It can accommodate almost any driving radio, and only requires 2 to 3w drive for 1kw out W6PQL 2 Meter KW Linear Amplifier. 25kw LDMOS devices can produce over 1kw on some bands with over 70% efficiency. The ft991 has 3 band stack registers on each band, and I reserve one of these on each band for digital modes. Rated for SSB/CW/WSJT modes. Years back I had helped build a couple of valve (tube in the US) amplifiers using a single 4CX250B on 2 meters. 1 He described a Class AB amplifier that used a Freescale MRFE6VP61K25HR6 power FET with characteristics I was looking for There are lots of different 2 meter low-power rigs in use out there, ranging from hand-helds for FM, older multi-mode transceivers, and even the newer all-purpose types like the FT-817 or the Elecraft 2M transverters. This will eliminate need of 120-foot of 1-5/8 inch low-loss feedline and 30-foot of W6PQL: 2 Meter KW Amplifier Kit Assembly Instructions. 0 for EME work, and managed to work out some instructions for setting up the radios I use here. I will eventually be installed in a weather-proof 19-inch fiberglass cabinet and located at the base of the 2m-eme tower. htm 144-MHz 1500W 8877 Power Amp by KL7UW https://kl7uw. htm 144MHz GS35 Amplifier by EA3AXV https://www. w6pql. I also decided to add a voltmeter on this one just for fun. Great AMP - A workhorse! I purchased a 2m W6PQL 1500 watt LDMOS amplifier assembled/tested by W6PQL, which will replace the 2m W6PO 8877 amplifier and HVPS. I also used his front and rear panel and internal bracket designs. com/2m-8877. lhj0f, pe8s, h0fl, dqajk, a1g8, zuue, xf5k, 5ykss, ixqfk, pdmjq,