HF conditions are terrible at the moment, so when could be better to put the latest version of the HF Packer Amp, the miniHFPA2 edition, to the test?
The amp is set to accept an input of 5W for an estimated output of around 30W. It also has the 60/40 and 30/20 Low Pass Filters installed.
A side view of the amp enclosure with the side panel removed, showing the clip-in LPF board.
I chose to look for a station operating on 40m as this is the best band for local (VK) signals during the day. My luck, the band was dead. Then I heard Gerard, VK2JNG calling CQ from Lake Innes Nature Reserve (VKFF-1955). I returned his call and received a report of 5/9.
I was delighted as I seldom receive such good reports when using my Yaesu FT-817 at 5W into VK2. You see, a quick check on Google Maps told me that we were 445 Km apart. So I asked Gerard if he could give me another report, this time with the amp in bypass mode. He gave me a 5/3. He went on to say that with the amp switched on, my signal was “crisp and the audio nice and clear.”
So there we have it: the amp certainly does what Virgil, the designer, set out to achieve.
I have LPFs for all bands and will use them when the time is right.
The LPF boards are professional quality.
Each board is marked with the bands they are designed for. The while guides aid with slotting them into place.
Each LPF is a 2×1 inch plug-in circuit board that is interchangeable in the field with the entire family of same size modules. Each LPF has a unique ID, and the panel LEDs inform you which LPF is active. Two LPF boards are plugged into the enclosure, one on each side. To select the one you need, all you have to do is flip the LPF toggle switch on the front panel of the amp. Field replacement consists of removing a side panel, unplugging an LPF and sliding in a different one.
To find out more, visit http://www.hfprojects.com