I just noticed some issues like that last weekend when operating the SAC CW contest. All off a sudden when tuning up on 10m a big bang occured in my linear amplifier. Now nothing got hurt it just blew the fuses. This amp used to be driven with 200W and I never ever had any issues before. Of course it could be the amp and I haven´t measured the K3 to confirm if there are any high power spikes due to poor ALC regulation. I was tuning with fast dots from the keyer.
Now I was thinking if the TXGain is set too high maybe that could do something? I guess I have to investigate but I simply haven´t had the time. Jim SM2EKM -------------------------- Dave Hachadorian wrote: > I'm getting my K3's set up for the CQWW DX RTTY, and notice > that there is a significant variation in power output > whenever the FSK goes from mark to space or space to mark. > One of these K3's is driving a high gain tetrode amp, and > the amp's screen current is jumping all over the place. The > power transient is only at the time of transition. The > steady-state power of the mark and space are equal. > > I've complained about this before, but it seems to be even > worse now. I'm using FW rev 3.30. > > This amplitude modulation has got to be producing some > illegal sidebands. > > Dave Hachadorian, K6LL > Yuma, AZ > > > > > > > > > > > > > > > > > > > > > > > > . > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
