Gedas,I just re-checked the WM frequency and I currently measure it sending on 185300.4. My measurement when I started it up at the end of September was 185,300.3. The cooler weather has likely caused that change, as the exciter is running in the helix can at the antenna base with no heat.
I always say 185300 plus a smidgen to give SIW a little extra room because of the "un-conditioned" environment of my transmitter. I also do not have lab grade equipment to precisely measure it's frequency.
It looks like on your grab of TAG if you "upped" the calibration of WM to .4, I think that would put TAG spot on. It's crazy to be talking about calibration of tenth's and hundredth's of a Hz on DIY equipment. Ha! How did they make it work back in the 191x/192x's?
Mike N8OOU 73