MX-P50M: initial operational experiences

In this post MEASUREMENTS AND CONVERSION OF THE MX-P50M POWER AMPLIFIER I took a detailed look at the technical data of two of these MX-P50M HF amplifiers.

Now, after three POTA activations, I can conclude that this power amplifier (PA) is a significant enhancement to my POTA shack, which comprises an ICOM IC-705 and a tuned antenna (SOTABEAMS BandHopper) using this Tactical Mini - Compact ultra-portable 6 m (19.6 ft) mast to erect the antenna.

The power-output can be checked here MEASUREMENTS AND CONVERSION OF THE MX-P50M POWER AMPLIFIER. I was running the IC-705 with 5W on the 40m, 30m and 20m Band.

Even in hot operating spaces of up to 30°C, if you do not cover the cooling fins of the PA, they will only get moderately warm. You can therefore always touch the PA without getting hot fingers.

I didn't receive any complaints about my transmitted signal – everyone is happy with this strong signal from a POTA park!

The energy consumption of the combination in a normal POTA activation was very informative. A typical SSB activation involving 30 contacts takes between 30 and 45 minutes.

I conducted the activations using one of the two LiFEPo4 batteries I own: one with 3.3 Ah (480 g with protective case) and one with 6.6 Ah (850 g with protective case). The batteries were fully charged before each activation. Afterwards, I charged between 1.3 Ah and 1.5 Ah into the batteries.

Consequently, even the smaller 3.3 Ah battery is sufficient for two extensive activations. If you only want to perform one activation, the smaller battery will definitely suffice – there is no reason to take the heavier one.

Here brief overview of the activations done with this PA: