[Elecraft] K3 output power failure.

[na5n at zianet.com]

Eric Rosenberg writes:

> Everything seemed fine until this weekend's ARRL RTTY Roundup. After  
> being on the air for about 4 hours, once again there no was RF output

Eric,
Sounds like an over temperature problem.  Especially if running RTTY at  
near full power.  The high duty cycle of RTTY can cause the PA to get very  
hot.  When it gets too hot, the radio shuts the transmitter down for  
protection until it cools off in 15-30 minutes.  Too much audio gain/ALC  
can cause the same.  Review the tech manual on transmitter setup about over  
driving the K3 or external amplifier.  Just sounds like you're driving the  
K3 a bit too hard for prolonged periods.

GL es 73, Paul NA5N