I have been reading a bit more about these matching networks and have found another one I think I will try as well.
Starting on page 15 there is a worked example of how to create a 'bandpass matching network to transform 50 ohms to the input of an SA602 mixer'.
Noting the suggestion from the previous posts about balanced inputs I think this particular circuit is unbalanced as all the components are grounded just before the input. I think using this circuit I would put its output to pin 1 of the NE602 and ground pin 2 via a 47nF capacitor (I have seen this configuration in several other examples).
Initially I have modelled this network in SimSmith and adjusted the components to create a match at a frequency of 7.15MHz (as I think this is unbalanced I have used 1.5k ohm and 3pF for the load), the simulation looks good and will be a great starting point for building the circuit for real. I will now test these new ideas out in practise and see which one I think works the best for me.
My reason for doing these experiments is that I find it a great way to learn and I also really enjoy making radio circuits.
If anyone has any additional comments or suggestions I would be extremely happy to receive them.
