[TenTec] Scads of used Icom IC-7300

[Paul Christensen]

>"Here in Europe on large antennas at night on the low bands, especially 40m, PIN diodes can partially forward bias and create IMD products.  All the strong arguments you hear from engineers in favor of PIN diodes are coming from the states, not from the engineers in Europe.  A reed relay is a better option."

I believe the concern relates to the type of switching diode and bias levels used in a *Receiver's* BPF, not a PIN T/R system.  Ulrich Rhode made this a popular topic in the early 1990s with his QST article titled: "Key Components of Modern Receiver Design: A Second Look."  See his discussion concerning PIN diode biasing with comparisons to other forms of band switching diodes.

QST subscribers can read it here:

http://p1k.arrl.org/pubs_archive/90957

Paul, W9AC