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Phono Amplifier upgrade - 2240

bktheking

bktheking

Gitter Done!
Been reading there is a service bulletin for my unit, can't find it. Suspect its a transistor upgrade after finding info on the 2270. Does anyone know the specifics?
 
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H405 and 406 are 2SC458 transistors, they look like a little outhouse. They have a reputation for going noisy. Replace them with 2SC2240, or KSC1845 from Mouser.

If there's tantalum caps in the phono section, replace those with a film or electrolytic of your choice.
 
No lead crossing required. Just install the new transistors with the flat side matching the silk screen.

Tom
 

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Seems all the electronics shops here in town (Canada) carry junk, NTE which I WILL NOT put into my system. I ordered the 2240's off ebay, it was the cheapest method.
 
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