Hi there,
I am building the Pearl and noted that the Ono uses different cascode transistors. Since the pinout is different, I have checked out what Zetex has which might be more appropriate and come to the following conclusions which I would like to have verified:
1. I am not quite sure whether the ZTX450 is optimal in cascode position -- I guess it would be optimal to go with a lower current unit. Should I also consider going for a high Hfe unit such as the ZTX692B? (http://www.zetex.com/3.0/pdf/ZTX692B.pdf) (The unit used in the Pass Ono is 2SC1844)
(((2. The capacitance multiplier circuit benefits from high beta transistor. I am going with a high Hfe Zetex unit (ZTX692B) of that I am certain)))
Your insight into would be valued.
Petter
I am building the Pearl and noted that the Ono uses different cascode transistors. Since the pinout is different, I have checked out what Zetex has which might be more appropriate and come to the following conclusions which I would like to have verified:
1. I am not quite sure whether the ZTX450 is optimal in cascode position -- I guess it would be optimal to go with a lower current unit. Should I also consider going for a high Hfe unit such as the ZTX692B? (http://www.zetex.com/3.0/pdf/ZTX692B.pdf) (The unit used in the Pass Ono is 2SC1844)
(((2. The capacitance multiplier circuit benefits from high beta transistor. I am going with a high Hfe Zetex unit (ZTX692B) of that I am certain)))
Your insight into would be valued.
Petter