"John Byrns" wrote in message
...
In article , "Ian
Iveson" wrote:

The quad 2 uses local +ve fb to one half of the floating paraphase
splitter, and -ve to the other half, and -ve overall. It's British.
Must be a good thing.

As near as I can see the Quad II uses an ordinary paraphase phase
inverter, not a "floating paraphase" phase inverter? I also can't see any
large use of positive feedback in the Quad IIcircuit. I see a very small
incidental amount of positive feedback that appears to be a side effect of
the way the loop feedback is connected.


Regards,

John Byrns

Its not quite ordinary, The cathodes share a common resistor as in the
cathode coupled variety but the second tube s grid is also coupled to the
plate of the first tube in the same manner as an ordinary paraphase unit. I
think this is called an enhanced para phase. Dont think you would call the
extra connect positive feedback either. Guess it could be though ,just one
of those perspective things.

Jimmy