70's toshiba quad. receivers?

[anthony bonn]

Hi, anybody out there have any opinions on the toshiba 304 and 504 quad receivers from the late 70's, spec's, quality?, thanks

 

[Soundfield]

Hi, anybody out there have any opinions on the toshiba 304 and 504 quad receivers from the late 70's, spec's, quality?, thanks

The user and service manuals for both are available at HiFi Engine (free registration required). They each have the same very basic matrix decoder circuit which at just 9 transistors is about as simple as it gets:

As a result the channel separation will be very poor.