4.5 " Full Range Speaker
I ordered this in the hope that it would work to replace a bad speaker in a Proton 320 clock radio. It did, with a little bit of fuss. The main thing is that the magnet structure has a larger diameter than the original. There was slight interference from an electrolytic capacitor (100uF/25V labelled C615 in my example), located near the audio amp heat sink and towards the outer edge of the PCB. A touch of the soldering pencil to slightly lift the innermost pin of the cap, tilting the body of the cap toward the heat sink, was enough to allow clearance. I also needed to adjust the dress of wiring so that it wasn't pinched between the speaker magnet and the daughter PCB that holds the switches. Mounting centers are perfect. The fiber gasket is slightly thinner than original, so I used on extra washer on each mounting screw.
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26-580 - DPDT Mini Toggle Switch - 1/4" Mount - 125V - 5A
TOGGLE SWITCH 1/4 MOUNT DPDT 125 VAC SUB-MINIATURE Toggle Switches, Mini, 1/4 mount, Voltage Rating: 125 VAC, Contact Type: DPDT, Current Rating: 5 A
72-8100 - LCD Digital Panel Meter
Velleman's LCD digital panel meter is designed as a digital DC voltage display meter for hobbyists and for industrial applications where accuracy is important. Over range indication informs a user of over-voltage conditions. Two to three readings are taken each se...
21-4576 - 1-1/2 X 1-3/4 Protoype PCB Board
Compact Prototype BreadboardPrefect for a variety of custom design and prototype applications. Boards are predrilled with solder pad holes at 0.10" spacing.See the matching prototype box designed for this board.
MCM Cat 57, Page 171
MCM Cat 56, Page 298