Aleph J Schematic

[bobodioulasso]

Install feet first so you'll be able to set the bias properly.
High feet are good.

[Zen Mod]

yup

you need at least 4cm of clearance , for proper air circulation

[kroyin]

Now that my F5T will soon replace my F5 ,I intend to reuse my F5 chassis, heatsink & psu for Aleph J. So a few questions

--If I omit C1 will I have to jumper the C1 cap pads?
--I have 2 Silmics ,so better to use them @ C3 . Can someone tell me the voltage rating @C2, I have some 220uF 16v,25V
--If I use BC550/560 do any of the resistor values need change. Also will my bias current go down?

That's all I can think of now :-)

Thanks

[Zen Mod]

Originally Posted by kroyin

Now that my F5T will soon replace my F5 ,I intend to reuse my F5 chassis, heatsink & psu for Aleph J. So a few questions

--If I omit C1 will I have to jumper the C1 cap pads?
--I have 2 Silmics ,so better to use them @ C3 . Can someone tell me the voltage rating @C2, I have some 220uF 16v,25V
--If I use BC550/560 do any of the resistor values need change. Also will my bias current go down?

That's all I can think of now :-)

Thanks

-- yes

--for C3 16V is plenty enough , for C2 35V is tight , 50V means peaceful sleep

--just use them and do not worry

[kroyin]

Thank you Aleph Angel , all the boys have moved on to shinier stuff the Aleph still seems to be your precious

[bobodioulasso]

Do you know an Aleph J dissipates some more than an F5?

[kroyin]

Yes I do, my heatsink can handle F5T V2 in a pinch

[bobodioulasso]

Nice.

[albertNL]

The feet will take a bit longer, but for as far as I know I do not need to set the bias on this amp. In thought the bias was determined by the circuit. There is nothing to adjust (no trimpots). Am I missing something?

[AudioSan]

that's correct albertNL