630 meter class D Power Amp designed to produce 200 watts output into a 50 ohm load with only 0 dbm (1mw) input at 472 to 479 khz .The output stage is a push-pull design using a pair of RFP250’s , each of these fet transistor will handle 200 watts, this is a very rugged output stage. The driver circuit for the output stage uses a fet driver chip with associated parts to control the drive and the bias of the output power transistors. The Amp will produce 40 to 200 watts into a resonant antenna with a 14 to 30 volts power supply. I use this Amp with an Elecraft K3 but also works with Flex, Kenwood and other transceivers. |
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See Elecraft app notes for K3 and K3s 630M operations. |
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630 meter 200W PWR AMP with combo low pass filter and scopematch $425.00 Plus Shipping |