[G8HQP Dave]

I think putting two dual-gate MOSFETs in front of a mixer on Band 2 is asking for trouble, unless you can be sure that stations will be sufficiently widely spaced in frequency that the excessive gain is more than compensated for by the improvement in RF selectivity.

Some years ago I designed and built an FM tuner, partly based on what I gleaned from the Ambit catalogues. I had a dual-gate RF stage, followed by a packaged diode mixer. The RF stage had a single tuned circuit before it, but a double tuned circuit between it and the mixer. The mixer was followed by a simple diplexer and common-gate J310 IF preamp. An LTP IF stage then fed into a Hitachi CA3089-like IF chip. My aim was something approaching communications receiver dynamic range, yet with hi-fi sound quality. Sadly, it is now compromised by a very high local noise floor during sunny weather!