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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.
https://www.qsl.net/yo5ofh/projects/preamplifiers/23_cm_gaas_fet_preamplifier.htm

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.
http://www.g0mrf.com/432LNA.htm

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.
http://www.db6nt.de/fileadmin/userfiles/_pdf/download_archiv/23cm_Vorverstaerker_2.pdf


Creation date : 08/09/2018 @ 21:27
Last update : 11/03/2019 @ 10:22
Category : 23cm Projects
Page read 1218 times


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