Jos said;
>Why dont we see switching systems based on pindiode, for input ( 100 w )
>must be possible nowadays.
I haven't seen any PINs that will handle more than 1500 volts.
Additionally, you'll need 10 microsecond or so reverse recovery time to
handle 160metres. Plus the tank circuit circulating current can easily hit
10 or 20 amps, so the PIN would have to have a substantial DC through it,
at least at the lower frequencies.
By the time you've provided the necessary RF chokes, the expensive diodes,
the big DC supply and sorted out the bypassing, ceramic switch wafers are
cheaper, smaller and more reliable.
73
Peter G3RZP
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