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Aleph J front end as pre amp???
Aleph J front end as pre amp???
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Old 31st January 2012, 12:27 PM   #1
audionut is offline audionut
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Aleph J front end as pre amp???
Default Aleph J front end as pre amp???

I've been building a set of JFET BOZ preamps for a bi-amped system...

As I have been reading about the jfet boz, I see that they have high distortion figures in the 2 to 3 volt range. To make up for some filter losses, I need to swing some slightly higher voltages.

It seems that the aleph j front end could be adapted to become a pre amp...After all, the Aleph J front end swings, I guess 24 volts or so and the Aleph J has small distortion.

Is this a viable idea??

I haven't heard the JFET BOZ yet...maybe I will be happy with it as it stands...
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Old 31st January 2012, 02:49 PM   #2
Zen Mod is offline Zen Mod  Serbia
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Aleph J front end as pre amp???
you need entire Aleph to have it functional as gain stage
it was already made in several ways
you can use IRF510 as output , with few changes to have , say , ~ 30-40mA of Iq.... and there is no need for Aleph CCS - plain CCS ( without modulation ) is sufficient then

but - if you ask me - BA3 FE is probably better solution in this moment
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Old 2nd February 2012, 05:32 AM   #3
qusp is offline qusp  Australia
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but - if you ask me - BA3 FE is probably better solution in this moment
yes indeed, if i were building a pre or a headamp based on pass at the moment it would definitely be BA3 based, it looks like a fun design and so flexible for future experiments. for example if you found for whatever reason you nolonger needed a pre, you could simply tack on one of the power stages and i gather there will be more to come, easy to add your own too. i think its a great idea and i'm keen to hear the BA3 beast Nattonrice has planned
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