Ramsey Electronics FM100B, Instruction Manual

Page: 26 / 56

FM100B
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26
D. LOW PASS AUDIO FILTERS
Note that we will be installing all of our precision parts in these next few steps.
The 5% and 1% components are listed together so follow the steps closely! 1%
values are used so the filters are well matched on the Left and Right channels
(these have 5 bands).
1D. Locate the center of the board where this group of parts is to go. We will
begin on the left side of this area.
2D. Install R76, an 82.5K ohm 1% resistor (gray-red-green-red-brown).
3D. Install R95, a 100K ohm 5% resistor (brown-black-yellow-gold).
4D. Install R81, a 10K ohm 5% resistor (brown-black-orange-gold).
5D. Install R77, an 82.5K ohm 1% resistor (gray-red-green-red-brown).
6D. Install R89, an 18K ohm 5% resistor (brown-gray-orange-gold).
7D. Install R84, a 10K ohm 5% resistor (brown-black-orange-gold).
8D. Install R82, a 10.0K ohm 1% resistor (brown-black-black-red-brown).
9D. Install R93, a 3.32K ohm 1% resistor (orange-orange-red-brown-brown).
10D. Install R83, a 10.0K ohm 1% resistor (brown-black-black-red-brown).
11D. Install R87, a 39K ohm 5% resistor (orange-white-orange-gold).
12D. Install R94, a 10K ohm 5% resistor (brown-black-orange-gold).
13D. Install R75, a 121K ohm 1% resistor (brown-red-brown-orange-brown).
14D. Install R92, a 51.1K ohm 1% resistor (green-brown-brown-red-brown).