DBX noise reduction for tape recorder

[Jenyok]

DBX noise reduction type 1 for bobbin tape recorder.
.
I find circuit for DBX noise reduction type 1 for bobbin tape recorder without special old chips i.e. mPC1252, mPC1253 . May be on discrete elements.
.

 

[Chris Daly]

Hi
There were 4 models of Type 1, the 180a, the 155, the 150, and the 150x
The 155 did not use the ic's made by NEC you mention.

Cheers / Chris