<?color><?param0100,0100,0100>Dear Andy, LF Group,<br><br>><?/color>The amp is specified as having a 50dBm third order intercept >point and by my reckoning could function as a power amp >delivering over 10W. That's linear !!! Frequency response is >10kHz to 60MHz. <?color><?param0100,0100,0100><br><br>Sounds like the kind of thing I could do with - living near Brookmans Park gives me MF field strengths of the order of 10V/m RMS, and much higher than that on the peaks. I abandoned attempts to make a wideband whip when I observed about 40v pk-pk RF on a 1m antenna connected to a scope probe... <?/color> A tuned input certainly makes life easier sometimes!<?color><?param0100,0100,0100><br><br>I read somewhere that pre-WW2 naval receiving systems, using basically long-wire antennas, were designed to operate with "up to 100V" unwanted signal on the antenna, with frequency separation of 10% or more. This was achieved using passive preselectors. The ob jective was to allow simultaneous multi - transmitter operation. When the war broke out, it was not found to be a big issue, because radio transmission from ships was kept to an absolute minimum to avoid direction-finding. <br><br>Cheers, Jim Moritz<br>73 de M0BMU<br><br>
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