[Lowfer] First Impressions: AMRAD Converter and Lowpass Filter

[JD]

>>>Only issue seems to be with the low-pass filter.  It works great up to 
>>>about 512 kHz, then I get all sorts of currently unidentified stations 
>>>centered at 530 kHz.

There are two Cuban stations, a Canadian, and possibly a TIS/HAR station or 
two within your region that are actually on that channel (plus sometimes an 
NDB on 529), so I don't think hearing those really indicates anything wrong 
with the filter, as such.

John