On Thu, Feb 27, 2025, at 06:16 AM, Jerry Gaffke wrote:
My guess is that the LPF does not behave appropriately for either VMCD or CMCD.
Perhaps a hybrid of the two was found to work best given the need to cover so many bands with so few LPF's.
One possible path forward might be to keep the current design for those that want all bands from 160m to 6m,?
but have an alternate build supporting only 6 bands where each LPF can be optimized for the frequency of interest.
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Jerry,
The model you posted does not include the 100pF capacitor across the inductor that acts as a second harmonic trap.
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I also got different inductance values from Toroids.info for the transformer windings.? If you use the info from that site and do the 3:2 windings for 12-volt operation, there is almost twice the power difference without L502.
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73
Evan
AC9TU
