Sorry to nit pick, however I do not know where to get 680nF inductors, only 680nH inductors.? I assuming that you do mean the 680 nanoHenry inductors that were suggested by?
Raj, vu2zap in this thread:
/g/BITX20/topic/27154925#60568That is unless I missed something about a part number.
Also, the relay and or off board filters do not address the spurs issues, only the harmonics issues.? The 2 spur fixes are either the shielded SMD inductors per Raj, or the Ashhar v5 fix with an LCL low pass filter before the last mixer in the transmitter chain.
It should be noted that there seems to be less harmonics when using SSB, but higher spurs on the upper bands.? For CW, Harmonics on the lower bands, and less on upper bands with little reported spurs on any band.?
This goes along with what I have been able to measure, though I do not trust the spurs testing that I did due to a poor RBW on the spectrum analyzers that I had at my disposal at the time.
73
Evan
AC9TU
