A New 250-W Broadband Linear Amplifier appears in the ARRL 2011 handbook and other years.
Any one recommend the ARRL 250 watt 1.8 to 55 MHz PA, found on page 17.35? The 6 meter coverage is an advantage, maybe a 7 on a scale of 10.
The PCB design can be found in the … \Supplemental Files\Chapter 17\250 W Solid State Amplifier\Combo.pcb It’s a combination of Amplifier PCB, low pass filters PCB and control PCB. The designer used ExpressPCB and is a free download from http://www.expresspcb.com
. The Cost for the combination is about $172 (2 boards) from ExpressPCB and about $110 (2 boards) for the amp only.
Alternatively, the PCB can be DIY fabricated using double sided photo pre-sensitized board for under $10.00 (amp only). Unfortunately; ExpressPCB does not have an export function for other mainstream PCB file formats. The DIY procedure requires a method to translate the Handbook combo file into Gerber or some other mainstream PCB format. I could re-do the amplifier from schematic to PCB layout; but, I do not want to mess around with an untested PCB, can’t let the smoke out