T501 can be left as is, but I don't think we can use the primary center tap when going for CMCD.
Need two L502's to power the two sets of BS170 drains.
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And this brings us to current-switching class D amplifiers. These actually?need?separate RF chokes that conduct a constant current over the RF cycle, and they?need?the drains?being completely decoupled from each other! So, using current-mode class D turns a very difficult design problem into a very easily implemented design feature!
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Jerry, KE7ER
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On Sat, Feb 22, 2025 at 10:33 AM, Jerry Gaffke wrote:
Could take the QMX+, redesign T501 and the LPF"s for CMCD with the tank placed out beyond T501.
