Elecraft KPA500 vs Tokyo Hy-Power 1.1Kfx

Posted by jsrobbins on Aug 17, 2012; 10:20pm
URL: http://elecraft.85.s1.nabble.com/Elecraft-KPA500-vs-Tokyo-Hy-Power-1-1Kfx-tp7561226.html

I am wondering if anyone has an explanation for why the Elecraft  
KPA500 amplifier (500 watts) employs 2 VRF2933 FETs (Microsemi) in  
the final PA where the THP uses 4 ST2933 FETs (STMicroelectronics) to  
generate very similar power levels.  The data sheets for each FET  
indicate that both brands are rated at 300-400 watts, support similar  
mismatches and run at similar voltage maximums.  They have very  
similar specs all together.

Perhaps our amplifier gurus could weigh in here.  Much appreciated.

73,
Jim Robbins
N1JR

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html