My TRIO KA-5500 was replaced from original power amplifier unit. (Jun 27, 2020)
My TRIO KA-5500 was replaced from original power amplifier unit. (Jun 27, 2020)
I got vintage stereo integrated amplifier.(TRIO KA-5500 lunched in 1975)
but it had be broken the final power transistors. therefore, I made new power amplifier unit and then replaced.
new amplifier unit's power is small(up to 1 Watt x 2), but system is running well.
Front view
Overview(before replaced power amplifier unit)
Original power amplifier unit.
new power amplifier unit.(LM380)
notice:The power amplifier circuit is almost based on the following site.
ZnO's Techincal Laboratory
new power amplifier unit.(bottom)
new power amplifier unit.(testing)
New power voltage reguration unit.
New power voltage reguration unit.(bottom)
New power voltage reguration unit and new power amplifier unit.
2 nd power voltage reguration unit.
New power voltage reguration unit and power amplifier unit.
Overview(after replaced power amplifier unit)
Front view.
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