Welllllll...yes. But not without journeying into some new territory.
You'll need to flip the whole circuit over so to speak, swapping positive with negative and substituting P devices for N devices and vice versa. I personally don't see any major issues. The transconductance shelving thing may be a small issue if you use the IR 9240 in the Aleph CCS circuit. The transconductance of the transistors here are a term in the currant gain equation.
It seems like a lot of trouble to go through because the available 2SJ74's are considered too expensive. Prices I have seen lately are in the $1.50 - $2.00 US each range IIRC. That's not too expensive IMO.
Cheers,
Graeme
You'll need to flip the whole circuit over so to speak, swapping positive with negative and substituting P devices for N devices and vice versa. I personally don't see any major issues. The transconductance shelving thing may be a small issue if you use the IR 9240 in the Aleph CCS circuit. The transconductance of the transistors here are a term in the currant gain equation.
It seems like a lot of trouble to go through because the available 2SJ74's are considered too expensive. Prices I have seen lately are in the $1.50 - $2.00 US each range IIRC. That's not too expensive IMO.
Cheers,
Graeme
Hi Dan,
Although I own a stash of 2SK170's and 2SJ74's I've not yet had the need to measure and match these parts. So my answer is: I don't know.
Others on this web site have matched these parts and reported their results. Hopefully one or more will respond here. IIRC their results correlate well with what you found with the 2SK170's. I have found that as the number of parts in the sample rises the percentage of close matches also rises.
Graeme
Although I own a stash of 2SK170's and 2SJ74's I've not yet had the need to measure and match these parts. So my answer is: I don't know.
Others on this web site have matched these parts and reported their results. Hopefully one or more will respond here. IIRC their results correlate well with what you found with the 2SK170's. I have found that as the number of parts in the sample rises the percentage of close matches also rises.
Graeme
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