144Mhz power amplifier 4CX250B
- This page provides information on the design and practical implementation of a rather inexpensive 144MHz high power amplifier using a pair of ceramic tetrodes type 4CX250B by LA0BY
144MHz preamplifier with BF981
- Design of a preamplifier for 144MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.