Bert Modderman Engineer

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23cm preamps

Noise figure isnt super at 0.8db but the preamp is very stable.
external power supply only.
0.8db noise figure 15db gain in alu housing 100 euro
0.8db noise figure 30db gain in alu housing 110 euro
dont choose the high gain unless you realy have high cable losses.

more info:

Preamp is made with a modern mmic made for low noise, very high ip3.
it is very stable and wont oscillate as easy as a preamp made with a fet
the preamp is unfiltered and can be used on 2m , 70cm or 13cm.
if your use is mainly another band then let me know, i will tune it
i make filters for 23cm for 100 euro that are around 0.2db if you want filtering.