Note: groups.io will be down for maintenance on Wednesday, October 5th, starting at 9AM Pacific Time (4PM Wednesday October 5, 2022 UTC), for approximately one hour.
Re: no rf output #bitx40help
Can you verify that you have PA power to the IRF510s? I would verify that it is on pin 2 of both IRF510s. Note, the PA power is always there, even in receive. Without the bias voltage, the IRF510 are pretty much open circuits.
Schematic link if you do not have it: http://www.hfsignals.com/wp-content/uploads/2019/02/ubitx_v5.pdf
I suspect that there is a wiring issue in the power to the PA.