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Holton 300 of own construction

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Vermes

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Supply:
Transformer 500W 2x50V supplies the device. Four capacitors were applied on a power branch 3300uF/100V each.

Terminals:
This is a board from Holton 400, but 3 pairs of transistors IRFP9240 and IRFP240 were soldered.

Preamplifier:
It is a stereo active tone control on a fairly well known operational amplifier TL084. Powered with a symmetrical voltage 2x12V.

Input selector:
It is made on systems CD4052 and CD4013.

Elements used:
  • Holton 300
  • transformer
  • preamplifier
  • input selector
  • drive ratios
  • heat sink
  • housing
  • capacitor
  • rectifier bridge



Link to original thread (useful attachment) – Holton 300 by piotr426
 

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