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Adding an LNASometimes you need a bit more sensitivity while still being portable. This is easily done through one small modification of the tinySA Start with soldering a single female Dupont connector to one of the Vdd points at the edge of the PCB. ![]() Warning: Maximum current drawn is 100mA. Monitor the temperature of the tinySA, if hot, switch off. Too much current drawn will destroy your tinySA Next is to make a small hole for the Dupont connector and put the tinySA back into the housing. ![]() After connecting a cheap LNA that gives 30dB amplification without noticeable noise and setting the RBW to 3kHz the noise floor is at a whopping -135dBm and the -80dBm signal is clearly visible. Be aware the LEVEL/EXTERNAL AMP setting is used to cater for the applied amplification so the displayed levels are still correct. ![]() Combined with the small telescopic antenna the tinySA is ready to do some QRM hunting ![]() |