Mesa GEQ Inductors - Gyrators

[mensur]

Hi guys,
I'll try to replace mesa inductors with gyrators, but I need some help:
1.Is the transistor emitter bias resistor fine(6.8K), or I should use another value?
2.Do I need to use dual voltage supply for the circuit?



Thanks

[DDD]

 - 6.8 kOhm value seems to be OK
 - As per the picture, there is a single 30V power supply. But depending on the whole circuit,  it maybe "floating" or something like that.

[mensur]

Thanks for the bias resistor, I draw +,-30VDC on the schem, not -30VDC~GND. And, are the feedback resistors (100R) OK?

Thanks.

[DDD]

Sorry, I can say nothing on the 100 Ohm resistors. They define the Q-factor of the pseudo-LC tank and depend on what you want to get.
From my point of view 100 Ohm is pretty low value.

[mensur]

Thank you, and what about dual supply, should i use dual or single voltage supply?

[Dr.Fox]

Офф форум то интернациональный! 8-)не ожидал.. круто)

[rust]

А потом пойдут отссылки на такие обсуждения с пометкой "сто раз уже перемалывали, читай форум"))) Некоторым поздно переставать лениться осваивать язык)))

[Gregg]

Я делал. Фильтры брал отсюда /но пересчитал/:

http://www.datasheetcatalog.org/datasheet/rohm/ba3812l.pdf