Using a passive antenna (VE3DO loop) with a Clifton Labs Z10042 11 dB Norton amplifier connected directly to Red Pitaya at N6TV, strong intermodulation from two nearby FM broadcast stations on 92.3 and 106.5 MHz was clearly visible (106.5 - 92.3 = 14.2 MHz):
Inserting the 14:1 transformer between the pre-amp and the Red Pitaya reduced the intermod significantly, and atmospheric band noise (wideband sensitivity) improved by about 4 dB:
We've been teasing you with news about our newest product for a couple of months now and the time you've been waiting for is here. The new STEMlab 250-12 with improved analog front-end performance will be available in December 2019 at a discounted price. Check out the preliminary technical information and some first look photographs of the product below.