💾 Archived View for spam.works › mirrors › textfiles › hamradio › fm_mike.txt captured on 2023-11-14 at 10:02:05.
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FM-MIKE 88 - 110 MHZ ________ \ANT / ???????? \ ? / ? ? \? / Q2 ??????????????????????????? ? \/ C6 R8 ?? ?C7 \? L1 ? ????? ?????/\/\/\/\??????NPN ??? ??\??C8 ? ? ? ?>??????R1 ?\| ? ? ? ??/\/\/\/\??????????????? ? ? R10 ? C9 ? ? ????/\/\/\/\?????)????????????? ? ? C10 ? ? ? ? ? ??????????? ? ? ? ? ????/\/\/\/\?????? ? ???????? ? R9 ? ? ???? B1 ???????????????????????????????? ? ???????? ?)??????????????????????????? ? ? ???? ? C1????????????)??????????)?????? ? ? C2 ? ? ? ? ????? R2 ? R1 ???????? ? ? ? ??? ?/\/\/\/\? ?/\/\/\/\??? R7 ? ? ? ? ?????????? ? ???????/\/\/\/\???)??????????? ? R? C3 ? ? ? ? ? ? e? ????? ? ? ? R4 ? ? d? ?Shield ? ? ???/\/\/\/\???? ? ??????? ? ? R3 ?? Q1 ? ? ?White ? ???/\/\/\/\?????NPN R6 ? ?MIKE ????????????????????????? ?>?/\/\/\/\?????? ??????? C4? ?????????? ? ??/\/\/\/\?? C5 ? ? R5 ? ??????????????????????????????? I.D. Val Quantity R1 10 K ohm 1/4 Watt 1 R2,6,7,8 1 K ohm 1/4 Watt 4 R3 100 K ohm 1/4 Watt 1 R4 8.2 K ohm 1/4 Watt 1 R5,10 15 K ohm 1/4 Watt 2 R9 3.9 K ohm 1/4 Watt 1 R11 220 ohm 1 C1 100 uF 25V (electrolytic) 1 C2 470 pF 50V 1 (may not be needed) C3,5 10 uF 25V 2 C4,9,10 .01 uF 50V (disc) 3 C6 1 uF 50V (electrolytic) 1 C7 5 pF (mica, zero temp) 1 C8 6 - 35 pF Trimmer cap 1 Q1,2 PN2222 (NPN High Beta) 2 M1 F.E.T. Cap Mike (Field Effect, capacitive. Radio shack elec. or even 8 ohm speaker (with resistors) will work ok) B1 9 V Transistor battery. L1 ** 8 turns of number 16 guage buss (solid) wire around a number 8 wood screw. ANT Wire attached to 2nd (or 3rd) coil of L1. (Soldered, and strain relieved.) Length may be approx 6". For experimental purposes, try this. 300,000,000 METERS ______________ operating frequency If operating frequency is 109 Mhz (Mega, or million Hertz), 300,000,000 divided by 109,000,000 = 2.752 Meters Take a wire 2.752 meters long, cut it in half, put one half on the 2nd (or 3rd) coil, the other half on the - (ground) side of the battery, and make the two 180 degrees apart. Works great!