R14 and R15 are only for "pull down". In case the inputs aren't connected to anything the gates of the input transistors would float and this can be very nasty, especially for your speakers. MOSFET's and JFET's most ALWAYS be connected to something!
The stage is a differential stage which means that the + input has influence on the - output and vise versa. Connect signal to + and you will get a non-inverted signal at - output without any signal at - input.
The stage is a differential stage which means that the + input has influence on the - output and vise versa. Connect signal to + and you will get a non-inverted signal at - output without any signal at - input.
Hello,
The resistor labels are little fuzzy to read on the
circuit diagram above, and I think that the Peranders
wrongly located the R15.
Actually, the R15 resistor serve for setting the gain
of the Balanced Line Stage preamplifier.
If you don't really need high gain, than use a little
higher value for the R15 resistor ( 200-500 Ohm ).
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
The resistor labels are little fuzzy to read on the
circuit diagram above, and I think that the Peranders
wrongly located the R15.
Actually, the R15 resistor serve for setting the gain
of the Balanced Line Stage preamplifier.
If you don't really need high gain, than use a little
higher value for the R15 resistor ( 200-500 Ohm ).
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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