Dueling 612s  RF Amp Testing
Channel: Dave VE3OOI
Date: 16/04/2019

The RF preamp used in the Rx front end and in the Tx chain as a preamp to the driver amp was based on a 2N2222 amplifier. Its a fixed high gain amp. However you cannot control the gain and as a result there was distortion in the Rx and Tx.  An alternative amp was needed.

This video summarizes testing of several RF amps. The clear winner was the LT1253 Opamp which has amazing performance both as a Rx RF preamp and as a Tx RF preamp for the PA.