Amateur radio : how and why of wireless with complete instructions on operation of receiving outfits (1922)
Grainger, Maurice J · New York : James A. McCann · leaf 122
£S4 **TQAOUND, z BfiTTERTbvolt: Plain Audion Hook-Up Using Loose Coupler and TwoVariable Condenser as Tuner. woroa PANEL … Feed-Back, or Regenerative, Hook-Up Using ThreeHoneycomb Coils. io2 AMATEUR RADIO within the primary instead of sliding in andout of it. The secondary has no taps on it. A variometer is two inductances, one ro-tating within the other, and both of them con-nected in series, or with one terminal of…
Radio · Amateur radio stations
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