Aleph J illustrated build guide

[PJN]

Great, I'll give it a try.

Thanks

PJN

 

[Zen Mod]

search for matching Jfets

all you need is 9V battery or 12Vdc supply and DMM

edit : page was open for too long ....... 6L6 jetted me there

 

[PJN]

Hi 6L6/Zen Mod,

Set up the testing on the jfets that I got from the store like you showed me. All eight ended up reading 11.4 mA =/- 0.01. I'm pretty surprised at the consistancy of these LSJ74's. Placed the order for the rest of the parts so soom I'm hoping to be hearing what an AlephJ sounds like. Thanks for all of your help.

PJN

 

[Zen Mod]

ya welcome

 

[6L6]

Fantastic! 11.4 should work great!

Carry on and build amps!!!!!!

 

[PJN]

Hi everyone,

Quick question, did anyone try substituting a fancy cap for C1, and was it worthwhile ?

PJN

 

[Zen Mod]

silmic , bypassed with MKC is hard to beat with anything

MKC means polycarbonate (anything from 10n to 1uF)

 

[stajo]

I also like MKC. Elaborating with small pF values in a RIAA now. Like

 

[Zen Mod]

caps in RIAA EQ are for sissies

real men are using just L and R

 

[stajo]

What kind of inductors is that?


Sent from my iPhone using Tapatalk

 

[Zen Mod]

small ones

and bigger ones



it really depends on circuit

I'm still just dreaming on mine , so no recipe from Mighty Moi

 

[stajo]

The cap free riaa correction. Im thinking of building/buying me a winding machine. Traded me up on a bunch of step-motors. Any tips there? A Rasp Pi mebbe. Gotta freshen up my python.


Its never to late to give up

 

[wengtech]

need advice

i have some caps for use in aleph J

which one will perform better sounding for the J ???

 

[stajo]

which one will perform better sounding for the J ???

No idea. Got bunches of the sames but I have come to like multiple small caps, 6800-10000 over cans. Tey 85 degree, dont mount in burning ampz.

 

[Zen Mod]

use them all

CLC or CRC

smaller then bigger

 

[stajo]

I have such loads of stuff that just goes stiffy. I am such a looser of "baying things, to less bang for the timetaking. But I could prolly supply a generation of passgear. Besides my friend has loads of the original sandys. What to do? Put them up for grabs or?

 

[Zen Mod]

better to discuss off topic in da pub

however , gimme better translation , for sandys , and maybe a list

so I can advise - what to put for grabs and what to send to OPLDF

 

[wengtech]

I'm planning to use 6x 150.000uf/35v per channel (monoblock)
Papa sugest a slow diode in class a amp, but he only using 8x 15.000uf for his stuff.

Not sure for the big can caps.
Is it better to use fast or slow diode for bridge? Thanks

I have some MUR3020WT for the fast bridge.
And IR GBPC3502 35A for the slow.

 

[ticktock]

fast + soft recovery + reliable

The latter will be an issue with such overkill of capacitance.
The MUR3020WT are fine, but I'd fit them on heatsinks though.
I don't need to mention you'll need a soft start, mate.

 

[PKI]

Why do you say overkill of capacitance? I used 0.4f per channel on f5Tv2 and all my FW amps are using 0.4f for a mono PSU setup... As one wise man told me: Whatever makes you sleep better, right ZM?