andy,
for many years i used the Palomar preamp. it worked well in the presence of a 50kw AM station on 1550khz. though it may be of older design and there are better pre-amps available it may be available at reasonable cost. good luck. larry n7dd -----Original Message----- From: Andrew Ikin <andrew.i...@btopenworld.com> To: Andy YO3JR <andyru...@gmail.com>; topband <topband@contesting.com> Sent: Tue, Feb 3, 2015 1:55 pm Subject: Re: Topband: Preamplifiers Andy, The Clifton Labs Norton and the RPA-1 are both Push-pull designs and thus have high >+80dBm second order intercepts. This is essential to avoid BCB mixing products affecting TB. Single ended amplifiers like the W7IUV may need some pre BCB filtering. 73 Andrew Ikin G8LUG _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
