Does anyone want to make an educated guess as to how W7IUV's emitter resistor modification may have affected the NF?
My guess is that the NF was changed little if any. I'm sure it helped the signal-handling capability. The only transistor I've ever used in that circuit is a TRW LT1001A. It had slightly better specs than the 2N5109. The original schematic is at www.w0btu.com/W0BTU-broadband-preamps.html and the transformer I used in the photos was W8JI's idea (in the early 1980s). 73, Mike www.w0btu.com _________________ Topband Reflector Archives - http://www.contesting.com/_topband
