Has somebody experiencewith the MTFTmulti Magnetic Balun with 3 taps or can somebody can gives me advice if it is useable on LF and MF frequencies ? The description is attached. Ps note I can not built anything by myself . Antenna will be a 100 meters long wire or a earth rod antenna thank you

On internet I found two nice items that can enhance the VLF transmission of WSPR. It is a broadband 5 watts amplifier and a 136/475 ATU . Has somebody experience in those items and or is somebody interested to build it for me. Thanks Leo OK8LEO