Accuphase E-303 & T-103

[PolAlbert]

Originally Posted by Canonicus

Very nice, PolAlbert. They sure look good together. Lots of features,too.

Thanks! Is the beginning of the journey

[PolAlbert]

News about E-303 temperature

I found online the service manual. And i dare to mess with the bias adjustment.

The temps are now about 43C with a room temp of 28C

So happy!

[Formerly YB-2]

Good job. Will contribute to a long & happy life (for your E-303).

[PolAlbert]

Originally Posted by Formerly YB-2

Good job. Will contribute to a long & happy life (for your E-303).

Do you know what the bias adjustment does?

[Formerly YB-2]

Normally, it sets the bias on the output transistors (power output stage). However, without actually seeing the schematic I can only guess. If the bias is too high they will be running with too much current, which generates the heat. That's why Class A amps run hot. Always on, even when idling. They are 'big' amps (for the large heatsinks, transistors, transformer size, etc.), to safely allow for the higher current (heat) compared to Class A/B. Many folks prefer Class A, but I'm generally good with our Class A/B.

[PolAlbert]

Thanks! I have the Schematic. do you know how i can upload it here, so anyone can have them?

[Formerly YB-2]

Don't think we do that here, but "the other" forum (Audiokarma - can I say that here?) has a listing for same. Think the DIY (do it yourself) forum also supports same.

[PolAlbert]

“The others” hahahaa
Thanks for you replys Sir