4m transverter

Some years ago at the old QTH (2012?)  I designed and built this transverter for 4m (70MHz). As I recall I erected a wire dipole for the band just before a contest and worked a few stations on CW.

At the present QTH, I have never been on 4m.

Many years ago (1968?) I recall working ZB2VHF via Es one summer from university with 4W of AM on 70.26MHz. I can't recall the 4m antenna we used, but it was at best a small yagi.

As I recall, this QRP transverter put out 1-2W on the band, but could probably produce a bit more with some optimisation.

These days there are quite a number of countries on the band. This was not the case back in the 1960s when it was mainly a UK allocation and only 70.2-70.4MHz. Maybe I should give the band another go? As I recall it is quite an effective Es band in the Es season, and with a few watts much of the UK can be covered.