[amsat-bb] Replacing parts on pre-amps

Gregory Beat w9gb at icloud.com
Mon Nov 10 14:49:40 UTC 2014

Early FET designs were sensitive to damage due to static or ESD.
Some amateurs installed external static discharge devices to reduce these failures.

Later FET designs incorporated some ESD protection.

Earl Andrews, VE3AB (Elliot Lake, Ontario) has a large collection of Dual Fate MOSFET devices
and other pre-amp active devices.
He has also tested and measured their characteristics in radio usage.

DownEast Microwave is a good source for modern GaAsFET devices.


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