Hi Giuseppe,
Thanks for the information about the T37-6 yellow toroid. I seem to remember reading something about that while researching toroids. I'm only getting about 1/2 watt RF power out using the T37-2 so your discovery to use the yellow toroid must be reason for your results. I thought it was odd that the C30 cap was missing and now I understand the mystery. Hi Hi NIce images of the results of the beacon signals. I also subscribed to your YouTube Channel and enjoyed watching your videos.
Did you use the GPS from QRP-Labs for your beacon or is it not needed for a CW beacon? Once I get my 6-meter beacon working, I'll give you a full report.