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titleQ: In the receiver output section the 2nd LPF is shown as a BLP-7-75+ on the schematic Rev 7, in the parts list, and in the Hardware Manual photo. That is a 75 ohm filter, but the ZFL-500LN+ amps are 50 ohm. Is there a reason a 75 ohm filter was selected? This also necessitates using BNC adapters, since the filter uses 75 ohm BNC connectors, not 50 ohm SMAs. Thanks for the clarification.
 This filter was selected because the only with 7 MHz one available from minicircuits. The mismatch 75 to 50 ohms has little effect. However I suggest using the TV dongle receiver which is much simpler and lower cost.
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