20-06-2023, 04:18 PM
Hi
Been a long time since I looked at the thread. I've since rebuild the loop after shoving up 50 watts of RF up the coax!
This time it was rebuilt with 2N3866 transistors which I highly recommend, I also built it on double sided copper laminate board Manhattan style, I also used 43 mix ferrite ring with 21 swg Bifilar wire. This then gave useful gain to over 100mhz, lower noise and higher output with less intermodulation from high power stations. The additional back to back diodes in parallel with the loop cuts down RF when I'm transmitting and subsequent high ac voltages on the transistor B-E junctions.
These days I'm experimenting with transmitting small loops with great success. I do it a different way to common practice and this has improved the efficiency of the loop massively, I may apply for a patent but not sure as yet.
Been a long time since I looked at the thread. I've since rebuild the loop after shoving up 50 watts of RF up the coax!
This time it was rebuilt with 2N3866 transistors which I highly recommend, I also built it on double sided copper laminate board Manhattan style, I also used 43 mix ferrite ring with 21 swg Bifilar wire. This then gave useful gain to over 100mhz, lower noise and higher output with less intermodulation from high power stations. The additional back to back diodes in parallel with the loop cuts down RF when I'm transmitting and subsequent high ac voltages on the transistor B-E junctions.
These days I'm experimenting with transmitting small loops with great success. I do it a different way to common practice and this has improved the efficiency of the loop massively, I may apply for a patent but not sure as yet.
