Hello Laurie, In most circumstances SNR will be determined by the 'band noise' (QRM - QRN), so the noise figure of a pre-amp won't matter too much (anything below 10dB should be fine). But, unless y
Hi David, did you test the MAV11 on 136kHz ? Mini-Circuits gives a frequency range of 50-1000MHz (while the MAR, ERA, RAM series start at DC), so it may have a internal C that limits the lowest frequ
<< I did some tests woith pre-amps and found out that most simple designs have a too poor IM behaviour and make things worse instead of better. If I would design one I would primarily aim at a high I
I forgot to list Mini-Circuits's new monolithic amps, these have even better IM behaviour : type gain (dB) noise fig. (dB) 3rd order IP (dBm) GAL-4 14 4 +34 GAL-5 21 4 +35 GAL-51 18 4 +35 GAL-6 12 5
Hello Laurie, In most circumstances SNR will be determined by the 'band noise' (QRM - QRN), so the noise figure of a pre-amp won't matter too much (anything below 10dB should be fine). But, unless yo
Hi All, I have been thinking about weak signals on 136 using QRS and DFCW. These techniques enable signals to be read which are buried 30db down in the noise(see Extreme narrow bandwidth techniques O