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qo100:wlan_amplifiers

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QO-100 and WLAN / Wi-Fi amplifiers

The EB-AB003 2.4GHz linear amplifier seems to come in two versions. A later one sold by Passion Radio has the external model number EB-AB003 but the internal marking HS2405X2 V.0.1.

The mod for the “classic” EB-AB003 is not applicable to this model as the internals are totally different.

The mod is for permanent TX (as this is just a dumb linear amplifier).

I found some photos from OK1UM here]] outlining the mod. I have not yet done the mod, but I wanted to get it captured for future reference.

It appears to consist of:

  • Connecting the RF input to a different point on the board
  • Possibly cutting tracks
  • Bridging together pins 4 and 5 of the ADA4851-4 chip.

Note that the RF out port is a reverse polarity SMA socket!!

The F1OPA 2.4GHz 100mW amplifier is ideal for driving this power amplifier.

qo100/wlan_amplifiers.1685046603.txt.gz · Last modified: 2023/05/25 20:30 by m0lte