Re: QRP kit amplifiers

Laurence Oberman

QRP Amp arrived so about to start looking at my ubitx sacrifice for
this project.
I just want to make sure I got a good summary from all the info in this thread.

Removing the pre-driver and finals:
Does this mean taking output from C84, to the 2n5109 driver circuit
(off-board) that Allison shared. This would be ground and signal
output then into the QRP Amp.

I will start with removing C84 to break the circuit and putting a 1uf
in series input to the 2n5109.

Prior to any additional work will perform a full characterization
harmonics and spurs with a probe at this point and share.

If it makes sense and this works I will work on a daughter board
gerber and make a few up for those interested.


On Thu, Mar 21, 2019 at 5:33 PM Darrell Collins <dcollins338@...> wrote:


If using BFR106E6327HTSA1 to replace all the 2n3904's in the transmit
section, are the emitter resistor values

described in the Wiki still good?

Thank you,



Join to automatically receive all group messages.