Had a bit of a scare the other night, yakking on 75m running about 1400 watts with the Commander HF-2500 and saw a flash out the corner of my eye and the amp kicked out. Reset it and my Grid current was CRAZY and as soon as I transmitted it spiked and kicked out.
Well now I am thinking a tube took a dump, not good as they are 5 to 6 hundred each for replacements. Opened up the top and was looking around for a possible blown diode which is common on Ameritrons when this happens, and found a blown 15a 250v fuse on the control board. Off to radio shack, and back in business. Not sure why the fuse blew but all is well now. Easiest fix I have ever had on an Amp.
Well now I am thinking a tube took a dump, not good as they are 5 to 6 hundred each for replacements. Opened up the top and was looking around for a possible blown diode which is common on Ameritrons when this happens, and found a blown 15a 250v fuse on the control board. Off to radio shack, and back in business. Not sure why the fuse blew but all is well now. Easiest fix I have ever had on an Amp.