Xiegu recently introduced the GPA-100 amplifier. I have the previous version of this amp, and it’s great. Yeah, the tuner isn’t wonderful, but I try to use resonant antennas whenever possible. The other thing I didn’t like about it was having to manually change bands. That’s not an issue when you’re just “parking and barking” on a frequency, calling CQ, and working a pileup. On the other hand, if you’re spinning the dial and hunting around for contacts, it becomes tedious.
This new version uses Bluetooth and pairs seamlessly with the Icom IC-705. Every time you change the band on the radio, the amplifier follows automatically. If you’re using CAT control via software like WSJT-X, it sends a command to the radio to change bands or frequencies, and the radio relays that signal to the amplifier via Bluetooth. That feature alone makes this little amplifier worth considering.
So why am I probably not going to buy it? Even though it’s on sale for an “early bird” price of $429, it may not be for me. The amplifier itself is great, but I already have one (albeit the previous version). Also, I want to keep my 705 for QRP work, which I only discovered after I bought that other amp. Turns out I prefer using my Icom IC-7300 in the field when I’m looking for 100W. Otherwise, it’s the 705 for QRP work and portability.
Now, if I didn’t already have another amplifier or an IC-7300, this would definitely be enticing. $400 is still $400, but that’s on the cheaper side of things if you’re at all familiar with ham radio gear. If I were coming into this part of the hobby for the first time, I would definitely buy it and pair it with my IC-705. Anything that makes ham radio easier is good to go in my book. God knows there’s enough difficulty and tinkering going on already.
Temporarily Offline does a great job, showing you how it works with the IC-705 in his video below