Receiving with wideband small active loops in NDB band (250 to 500 KHz)

I published a new article
“Receiving with wideband small active loops in NDB band (250 to 500 KHz)”
where some problems are discussed when using wideband active loops with common base amplifier and crossed coplanar loops. Look at http://www.lz1aq.signacor.com/. Users of AAA-1 amplifiers can use the suggestions and results described there.
LZ1AQ