Joe, Are you making an assumption that the P3 input impedance is 50 ohms? That may or may not be true. I don't know the design parameters of the P3, but it certainly occurs to me that it is not necessary to use a 50 ohm input impedance.
Yes, SDR-IQ and LP-PAN have the 50 ohm input, so connecting those devices to the K3 IF Out would cause loss. 73, Don W3FPR Joe Subich, W4TV wrote: > >> A 50-ohm match is not required in any case. >> > > That’s not exactly true. With devices like LP-Pan or > SDR-IQ that have 50 Ohm inputs connected to what is a > high impedance output, the transfer loss (antenna to > IF) was still in the range of -6dB even with the N8LP > modification. The rest of the solution was to use a > Clifton Labs Z-10000 buffer amplifier (high impedance > input) in a unity gain configuration, install a 4:1 or > 9:1 (step down) transformer, or modify the SDR-IQ for > a 200 Ohm input. > > 73, > > ... Joe, W4TV > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
