Vermes
Advanced Member level 4
Assumptions:
The main assumption was to create a reliable amplifier for extensions on STX transducers.
This project was designed for home made amplifier Holton 200. In the original version, the housing was impractical and boards were placed above the transformer, what caused terrible noise. That is why the amplifier was removed and placed in new housing from cassette player DIORY, which looks more aesthetically.
Toroidal transformer inside is 2x 40V 500W.
Filtering is 13 600uF/63V for side.
Half of the amplifier is for the power and the other half is for the power amplifier and signal cables, so no signal cables are near the power cables.
You can also add a fan in the rear wall, near the heat sinks.
Pictures of the first version of the construction:
And the amplifier in new housing:
Link to original thread (useful attachment) – Nowe wcielenie Holtona 200 by Krychol rc.