[Elecraft] continuous relay click in RX ANT IN

Paul Christensen w9ac at arrl.net
Mon Jul 12 10:11:13 EDT 2010


> .5 volts peak, which is the approximate conduction limit of a silicon
> rectifier like a 1N4007, is only 4 dBm!!!! That will turn your K3 into a
> Yaesu FT-101 for IM and even order performance.

Reminds me of my first Field Day in 1975 while in high school.  Multiple 
stations, one per band, no amps.  We couldn't understand why an incandescent 
lamp on the back panel of my friend's FT-101B was glowing brightly when 
stations on other bands were operating.  As I recall, we had a reasonable 
distance between antennas.  Of course, the lamp was there for overload 
protection and it didn't take much RF coupled back to the antenna to 
activate it.  The FT-101B was absolutely unusable for FD.  Being new into 
this at the time, we had not let discovered stub and filtering concepts but 
it was an important learning moment.

Looking back, I cannot think of a receiver I've used that had poorer 
overload performance than the FT-101.  For us K2/K3 owners, glad those days 
are long gone...

Paul, W9AC




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