1070 preamp transistors

The Fuxtor

Addicted Member
believe i got a noisy transistor in the preamp, just going to replace all 4. wondering about subs?
2sc1328 will be replaced with KSC1845 and the 2sa763 will get replaced by KSA992.
looking at Digikey, the ksa992 come in 2 versions, one with hfe of 200 and another at 300? which is the version to get? or does it really matter in this application??
The 1845's have a few variants as well???

The unit plays nice thru main in jacks, but once the internal preamp is connected it sounds like cat playing on piece of sheetmetal thru a microphone on one channel!!
 
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