#26
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I found a source who has two of the three 4.5-MHz sound traps that I would need to build this preamp. In the schematic (below) they are L1C1, L2C2, L4C3.
I am wondering about substituting a modern component for coil L3, which is described as: "North Hills coil no. 120 I set at 400 mu-h" I see variable inductors at sources like mouser.com, but I'm not sure what (if anything) might work. Regards, Phil Nelson Phil's Old Radios http://antiqueradio.org/index.html |
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