[AMPS] RF preamps for VLF

[Tom Tishken KD4WOV]

Has anyone any experiance or schematics for preamps for VLF around 110khz to
190khz?

Any thoughts about simple preamps with a tunable preselector and gain
controls?

Any thoughts about HF monoband preamps?

Any thoughts on HF mono band preamps with a very narrow bandpass to
eliminate blanking due to high power SW stations?

In contesting has anyone used preamps with AGC?


Last question:
Has anyone used negative feedback with transistor amps for better linearity?


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