50W Amp for QCX-series - QRP-Labs

[Jean-Baptiste GALLAUZIAUX]

I use mainly my HL2 on JS8 mode with Quisk and JS8Call on all opened bands.

I am planning to do some CW again probably on 30M and would like to have some more power. Did a member of this group use the 50W Amp for QCX-series by QRP-Labs? If yes could he control the Amp with simply a wire between the EXTTR socket and the 50W Amp?

73 - Pierre - FK8IH

[Mats Sundin]

If I remember right the QRP labs PA needs +5V to go into transmitt (instead of GND).
You probably need some circuit to handle switching correct.

Check this out https://groups.io/g/QRPLabs/topic/50_watt_pa_with_kx3/108581379

//Mats - SM0FPR

[Jean-Baptiste GALLAUZIAUX]

I found this post in the QRP-Labs groups.io, a post by ND6P "I added this mod inside my 50W amp to add low-active PTT capability without disturbing the existing high-active PTT. Then I wired up a PTT cable that connected the KX2's PTT signal to the tip of the cable's 3.5 mm plug. I'm guessing it's that same as what would be needed for the KX3." with this attached schematic, might it be an answer to my problem?