Aleph J illustrated build guide

[Zen Mod]

just go for it

Papa's palm rule and , say, 35W per device , whatever you meet first

listen and decide - is it better to your ears

 

[tommydoan84]

Thank you for the feedback ZM!

just go for it

Papa's palm rule and , say, 35W per device , whatever you meet first

listen and decide - is it better to your ears

 

[Zen Mod]

Thank you for the feedback ZM!

yeah ,I'm living in feedback

 

[nuconz]

just go for it

Papa's palm rule and , say, 35W per device , whatever you meet first

listen and decide - is it better to your ears

what if you can't hear well?

 

[roger57]

Alpeph J Parts Changes

Hi all,

Bought a couple of Aleph-J boards a couple years back and will finally get around to building them.
I have read 6L6's build guide, and a few additional pages bookmarked, but I am curious if there were any part changes or omissions I should be aware of?

I have this from the last few pages here:

R30 - Jumper
C6,C7 - DNP

So I don't have to go through every page (it would be fun if I had the time) are there any others?

thanks folks!

 

[Zen Mod]

what if you can't hear well?

then buy D class amp

or Levinson

or ........

 

[Dennis Hui]

Hi Roger,

Another one is to use 1k resistor for R8 instead of a 2k pot and setting it at 1K.

Cheers,
Dennis

 

[roger57]

Hi Roger,

Another one is to use 1k resistor for R8 instead of a 2k pot and setting it at 1K.

Cheers,
Dennis

thanks,
Should the pot first be adjusted in actual circuit and then a resistor selected, or has it been found by most builders that a 1K is about optimal?

 

[Dennis Hui]

The original schematics actually uses a 1K resistor.
I guess the pot was added to the PCB to allow some adjustment of the current
to the jfet diff pair.

 

[Zen Mod]

trimpot in Aleph CCS (sense part) is for coarse Iq adjustment , trimpot in input LTP CCS is for DC offset adjustment , same as (if existing) trimpot in LTP drain , modulation side

 

[Roo2]

Hi. Ive received the transistor kit from the diyaudio store and Q3, Q4 (ZTX450) are not paired up. Is this OK or should they be in matched pairs also?

 

[NicMac]

No need for pairing.

 

[Roo2]

I've purchased the 562R resistor for R6. Should it be installed or use a jumper?

 

[6L6]

Jumper

 

[Roo2]

Thanks

 

[Roo2]

Probably a dumb question... Can I connect a DAC directly to the input of the AlephJ (no preamp)? Something like this?
rBlink - Wireless DAC - Arcam
Volume control by the BT source device?

 

[Zen Mod]

yup

though , it'll always sound better with proper preamp in between

 

[mkane77g]

I can dial this down to 32v. (Sure Electronics' webstore Mean Well MW 36V 16.6A 600W AC/DC Switching Power Supply SE-600-36 UL/CUL PSU) Is it suitable for the Aleph J? thanks

 

[Zen Mod]

J needs bipolar supply , nominally +/-24Vdc , in praxis around +/-22V5dc

go figure .......

 

[mkane77g]

darn. Whats another c-note