Hi ! I'm trying to repair my PM-450. The culprit is a 2SC2578 from Sanken. On the Sanken website, it says it's obsolete and lists the 2SC4467 as an alternative.
There are two pairs of 2SC2578 and 2SA1103 on the power stage, so I guess I should replace both pairs with their more recent alternatives, 2SC4467 and 2SA1694, all from the same waffer.
But the thing is, I don't know where to find matched pairs. I contacted my local electronics store that said they could try to find transistor from the same series but there is no certainty they will be matched precisely.
Anybody knows a website where I could get these ?
There are two pairs of 2SC2578 and 2SA1103 on the power stage, so I guess I should replace both pairs with their more recent alternatives, 2SC4467 and 2SA1694, all from the same waffer.
But the thing is, I don't know where to find matched pairs. I contacted my local electronics store that said they could try to find transistor from the same series but there is no certainty they will be matched precisely.
Anybody knows a website where I could get these ?
I think best you can do is to find a supplier who can test few transistors and choose pairs with nearest hFE's if you want to match them perfectly.
Alternatively you can buy few transistors, test + match (transistor tester costs ~10usd/eur)
yourself and then return rest of them. (check seller return policy)
Alternatively you can buy few transistors, test + match (transistor tester costs ~10usd/eur)
yourself and then return rest of them. (check seller return policy)
Thanks !
I have another issue, it seems that this model is not easy to find online, but I'm not sure how to find a replacement. Would any other transistor with similar characteristics do the trick ?
I have another issue, it seems that this model is not easy to find online, but I'm not sure how to find a replacement. Would any other transistor with similar characteristics do the trick ?