not want to use Crystals, Frequency Synthesis, DDS, etc. Let's say 2 MHz and 100 MHz. I don't know where to start!
If you want to handle the 2-100 MHz range in a single sweep in a single oscillator, that is not going to happen.
Of course, you could make a 2-100 MHz sweep with a VFO running between
122-220 MHz and mix it down with a 120 MHz overtone crystal, but the frequency stability will be quite bad, due to the VFO in the VHF range.If you want 2-100 MHz from a single oscillator, that is a frequency range of 1:50. If only one component is tunable, typically the capacitor, this requires a 2500:1 capacitance range. This is clearly impractical due to stray capacitances. Clearly both the capacitance and inductance must be tuned, but getting 50:1 or similar ratios for both the inductance and capacitance is hard.
With only a tunable capacitor (capacitance diode) trying to reach larger frequency ranges larger than 1:3 is asking for troubles, as this already required a 9:1 capacitance range, including stray capacitances.
In the old days, when tubes and transistors were expensive, elaborate mechanical switching was used to switch in various inductances and capacitances in series/parallel. These days, when the active component costs practically nothing, it makes much more sense to build a complete oscillator for each subband and only connect power to the oscillator to be used at a particular time.
You might for instance build an oscillator for 2-6 MHz with a big varactor intended for MW (AM) receivers.
The next oscillator could cover 5-15 MHz, next 12-36 MHz and finally
33-100 MHz, all these with low capacitance varactors, several in parallel at the lower bands. There are plenty of designs for these HF and VHF frequencies, which should be easily scalable to those frequency ranges.One other alternative would be to build a 50-100 MHz VFO followed by five divide-by-two frequency dividers followed by fixed low pass filters at each tap. Since the square wave output from the divider contains a lot of 3rd harmonic, to simplify the low pass filters, the VFO tuning range should be less than 1:3, in this case 1:2.
following:
etc. No circuits to build. Just demo circuits for illustration, sometimes only the small signal model.
specific components. Very little on how to generalize things into different frequencies. (The ARRL handbook 2010 and Experimental Methods fall under this).
any S parameter files for the devices I'm interested in using.
I do not like the recent ARRL handbooks, the older ones have better technical contents. Try to locate a 10-20 years old ARRL handbook from a library or eBay etc.