Hi Robin & the group,
I see a number of people have allready responded with some good advice on this one but heres my 10p (10c) worth.
I would go along with the idea that adding a small capacitor in parallel with the trimmer is the simplest option and saves the "stress" of changing the number of turns on T1 and the only issue I can see with that is that by adding a capacior accross the trimmer you slightly reduce the total "swing" or range of tuning possible for T1. So at some future date you may want to peak in a different part of the band and not be able to do so due to the reduced tunning range. In practical terms it may not matter very much as the receiver is very sensitive and even signals off-tune are still of easily copied. My QCX is "peaked" at 3.560 MHz but still works perfectly well over the rest of the CW range. I "peaked" around 3.560 MHz to make it most sensitive in the area where one might expect to hear other (possibly weak) QRP signals.
Regarding "tweaking" T1 turns. I wound my T1 with too many turns on purpose with the notion that it would be easier to take turns off as oposed to adding them. I soldered all but one terminal of secondary 3 into the board permanently. The end of the secondary 3 winding (tuned winding) was soldered in "lightly" so it could be removed without to much difficulty. I had to remove quite a few turns on my T1 but with the aid of a pair of tweezers a few turns at a time can be removed with patience and the end of the tuned winding re-soldered. I seem to remember it took me 3 or 4 re-workings before I got my trimmer roughly mid-position.
73,s
Des (M0AYF)
