630M Station

630M Amp for sale

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Fet driver circuit board

Review by KB5NJD

630 meter class D Power Amp designed to produce 100 watts output into a 50 ohm load with only 0 dbm (400 to 600 mv ) input at 472 to 479 khz .The output stage is a push-pull design using a pair of 34N20’s , each of these fet transistor will handle 150 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 30 to 100 watts into a resonant antenna with a 12 to 24 volts power supply. I use this Amp with an Elecraft K3 but also works with Flex, Kenwood and other transceivers.

See Elecraft app notes for K3 and K3s 630M operations.


630 meter 100W PWR AMP with combo low pass filter and scopematch $395.00 Plus Shipping