While Dallas Lankford uses FT50-75 toroids in his design of a Norton amplifier,
I found an article on www.qrp.pops.net/preamp.htm where a Norton amplifierwith
binocular cores BN43-2402 is described (a design by Joe Reisert) . I just tried
to make the windings, however, I discovered that it is impossible to do a 12db
amplifier with AWG 32 wire even if trying do the 9.5db version which uses 9
windings you have to squeeze the wire into this little binocular. (I could use
a smaller wire, but I don't have a smaller wire at hand right now)
Can I replace the BN43-2402 with its larger brother BN43-202? Second question:
Wouldn't a BN73-2(4)02 a better choice?
73
Kurt-Erich
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