Bryan,
Can you make the bias adjustment as described in the manual?? That is done with the QCX in practice mode (no RF output) and an amp meter connected in line with the power supply.? If that works, I would think the IRF510s are OK and look to the transformers as the possible issue.
Most of the time, it is poor connections with the leads of the inductors and transformers in these types of kits.? It can be hard to burn or scrape off the enamel insulation.? I scrape the wires and crank up my temperature-controlled iron when soldering them.?
The RF probe would at least tell you if you are getting the signal to the gates of the IRF510s.
If you plan to build more kits, I would suggest that you look into purchasing an oscilloscope, at least 20MHz capable.? I like the Siglent series of scopes.? I have read good reviews of the Hantek and Rigol series as well.? Hantek is the lowest cost of the three, with Rigol offering lower-priced models with lesser specifications than the Siglent that I have.
73
Evan
AC9TU
