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23cm Projects - Pre-Amplifiers

Klik voor vergroting23cm GaAs-FET preamplifier by YO5OFH
On 23cm the best way to obtain a good RX-sensitivity is to use a GaAs-FET in the front-end, since these devices show very low noise figures. This particular design is not very different from the common ones.

Click to enlarge435 + 1296MHz ATF54143 Pre-amplifier by GØMRF
The ATF54143 is a PHEMT device from Agilent technologies that can provide low noise figures combined with high signal handling characteristics.

Click to enlargeA low noise amplifier (for the 23cm band) by PA4DAN
I wrote a story about this amplifier for school.

Selektive HEMT-Vorstufe für 23 cm durch DB6NT
Der hier vorgestellte rauscharme Vorverstärker wurde so ausgelegt, dass er für alle Betriebsarte und -fälle wie ATV, OSCAR, SSB/CW usw. verwendet werden kann.

Creation date : 08/09/2018 @ 21:27
Last update : 03/12/2020 @ 20:21
Category : 23cm Projects
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