Ramsey Electronics FM-100, Сборка и инструкция по эксплуатации

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FM-100 Page 29
F. PEAK HOLD AND ACTIVE FILTERS
1F. Install R79, a 47K ohm resistor (yellow-
violet-orange). Stands upright.
2F. Install R75, a 100K ohm resistor (brown-
black-yellow). Stands upright.
3F. Install R72, a 47K ohm resistor (yellow-
violet-orange). Stands upright.
4F. Install R76, a 1K ohm resistor (brown-
black-red). Stands upright.
5F. Install R67, a 47K ohm resistor (yellow-violet-orange). Stands upright.
6F. Install R58, a 15K ohm resistor (brown-green-orange). Stands upright.
7F. Install R34, a 47K ohm resistor (yellow-violet-orange).
8F. Install R44, a 1K ohm resistor (brown-black-red).
9F. Install R27, a 15K ohm resistor (brown-green-orange). Stands upright.
10F. Install R22, another 15K ohm resistor (brown-green-orange). Stands
upright.
11F. Install R28, a 47K ohm resistor (yellow-violet-orange). Stands
upright.
12F. Install R51, a 100K ohm resistor (brown-black-yellow). Stands
upright.
13F. Install R54, a 47K ohm resistor (yellow-violet-orange).
14F. Install D9, a 1N4148 type diode (orange glass body with black stripe
on one end). Make sure this diode is installed in the correct way with the
stripe on the same end as shown in the parts layout diagram. This diode
and its surrounding circuitry rectifies the audio signal into a DC level. Then
C71 holds this level for a long duration. The resistance of R79 then
determines how long C71 holds its charge, the less the value, the less
time C71 holds its charge. This is seen in the bargraph meters when you
have a single pulse like a drum beat. C71 and R79 set the time it takes for
the meter to go from full scale down to zero so that your eyes can see the
pulses better.
15F. Install D4, another 1N4148 type diode (orange glass body with black
stripe on one end). Again check orientation before soldering. This is the
rectifier for the other channel.