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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!