I noticed something Friday night during the Zombie Shuffle.
I decided to unhook the HF9V from the KXPA100 and connect it directly to the KX3. After all, it was a QRP event and anything over 5 Watts wasn't kosher - so what did I need the amp for? Signals were noticeably louder and again, there was noticeably less background noise on 40 Meters. This, even though the KXPA100 was being totally bypassed.
I am not getting rid of the KXPA100 by any stretch of the imagination - so any of you who might be out there and are hot for one - don't start salivating. But I am going to take it out of line for the time being and will use it only if I need to work an ATNO DX entity or a special Special Event Station - where QRP just doesn't seem to be getting through. I mean, that's the only reason I got it, anyway. It's easy enough to put back in line in less than a minute, if need be. Just move both the computer cable back and antenna connections back to the amp - that's it ..... easy peasy.
Moving the USB cable from the back of the KXPA100 directly to the KX3, allows my logging program to still recognizes what frequency I am on. Isn't that something? I guess I've gotten so lazy that I prefer the radio telling the computer what band and frequency I'm on rather than typing it in! LOL! And I remember the days when there was ONLY paper logging. How spoiled I've become!
I plan to purchase a DAIWA antenna switch so that I can still choose between the HF9V and the W3EDP (whenever I get THAT back up). I have an MFJ switch ..... but it leaves a lot to be desired. Strangely, it's the only MFJ product I've ever purchased that I was not satisfied with,
Unfortunately, ANT1 and ANT2 function on the KX3 doesn't work without the amp, but that's a convenience I can learn to live without. I guess the extra relays and antenna jumper connections do make a difference, especially when you're dealing with receiving less than 20 over 9 signals. The purer the connection, the better.
72 de Larry W2LJ
QRP - When you care to send the very least!