Vermes
Advanced Member level 4
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