hey,
I have a load of 'NAIM' NA009 transistors I say 'Naim' cos they are marked with this but there is no way they made them. I have 24 PNP and only 2 NPN. I bought an electronics factory job lot off ebay a while back and these were in there.
obvs know a bit about electronics but not enough to know this!
question is, what can i do with them (other than sell them)? I like messing with electronics and learning as i go. I thought id throw this out here to see what comes back.
am i right in saying class A is possible with NPN only, but a waste of time these days?
one or two amps using the pairs for A/B?
next question, can the specs be measured or determined? 80A and 350W is mentioned in naim pamphlets of the time. nothing else.
would this all be a waste of time and using known chips would make more sense anyway for an in-audible difference???
can these be retro fitted to Niam NAP models of same rail voltages as the NAP 300 / 500. provided the voltages are the same, pin outs changed to suit and adequate heatsink could these be used as drop in on other amps?
any/all thoughts most welcome
Ta
I have a load of 'NAIM' NA009 transistors I say 'Naim' cos they are marked with this but there is no way they made them. I have 24 PNP and only 2 NPN. I bought an electronics factory job lot off ebay a while back and these were in there.
obvs know a bit about electronics but not enough to know this!
question is, what can i do with them (other than sell them)? I like messing with electronics and learning as i go. I thought id throw this out here to see what comes back.
am i right in saying class A is possible with NPN only, but a waste of time these days?
one or two amps using the pairs for A/B?
next question, can the specs be measured or determined? 80A and 350W is mentioned in naim pamphlets of the time. nothing else.
would this all be a waste of time and using known chips would make more sense anyway for an in-audible difference???
can these be retro fitted to Niam NAP models of same rail voltages as the NAP 300 / 500. provided the voltages are the same, pin outs changed to suit and adequate heatsink could these be used as drop in on other amps?
any/all thoughts most welcome
Ta
Member
Joined 2009
Paid Member
why not build a classic NAIM Class AB quasi-comp amplifier. The oft-built NAP 140 is a design you could use, with lots of DIY material on it, but you'd want to 'flip upside down' the circuit, so that you could use your PNP output devices instead of the NPN.
did not know there was such a thing as quasi-comp. kits are super cheap too.
I also see there is a lengthy forum on this kit too (NAP-140 Clone Amp Kit on Ebay).
Thanks for the suggestion i will have a good look.