Hello Jim,
??? You are certainly not alone with Si4432 troubles. I had come to the conclusion that about 1 in four of the HW-240 modules work, and those that do give an output of -15dBm at 434MHz. I initially bought four. When only one worked I got a further two that weren't supposed to be HW-240s, but that's what came anyway. One of those worked so I had the two I needed. Removing the output filter only, brought the level up to +8dBm. Near enough for initial testing I thought.
??? Unfortunately the SA failed to display any response to a test signal input (10MHz at -20dBm). So after a lot of searching I managed to find two more modules that definately were not HW-240s. In case you can find them they were marked XL4432-SMT. Visually anyway they are identical the the one pictured in Erik's modification posting (#846). And the output is +13dBm without removing any parts, yet.
?? Would you please let me know where you found the "test program written by John Price (WA2FZW)". It sounds very useful and I have not been able to find it.
??? The bad news is that I still have no signal displayed on the SA, and for now all the bits have been put into the "someday perhaps" drawer.
?? Good liuck with yours Jim.
73.
Tony
(G3PTD)
