[Elecraft] KPA500 - Full Power Keydown

[Chuck Smallhouse]

To add to K9YC's comments:

EME QSOs are completed in really "weak signal" conditions, especially 
those via CW.  WSJT digital modes have apparently have greatly helped 
smaller stations (and "no code Experts) make contacts (not 
necessarily QSOs, by my definition).

Here QRO+ power levels improves the success rate.   Often with HB 
PAs.  The FCC statement " only enough power need to provide 
communications",  has some meaning here !

W7CS




To correct a perceived misunderstanding about JT65 and operating power.
JT65 is a WEAK SIGNAL mode, NOT a QRP mode. On the HF bands, it is
considered good practice to run fairly low power on JT65, JT9, and PSK31
so that stations with lousy receivers are not overloaded, and also
because these modes have good enough noise rejection that relatively
little power is needed IF you have decent antennas, and IF both stations
have relatively little RX noise. A good USB sound card can easily
improve JT65 decoding by more than 10 dB -- that's 10X the power.