Were are the Aleph series service manuals?

[davidallancole]

Were are the Aleph series service manuals?

 

[GRollins]

Nelson had to remove them a year or two ago because they were being used by bad guys to build products which they were selling for profit.

Grey

 

[davidallancole]

That sucks that somebody would abuse Mr. Pass like that. Thanks for the comment.

 

[GRollins]

I confess to having mixed feelings about it, myself: Disgust and Revulsion.
Hangin's too good for some folks. Stake 'em to the ground, cover 'em with honey...and pour round 'bout a pound of fire ants on 'em.

Grey

 

[carpenter]

...and pour round 'bout a pound of fire ants on 'em.

Grey

Only one pound?

 

[davidallancole]

So whats left for finding info on building these amps is within this forum then?

 

[Nelson Pass]

In the case of Aleph manuals, members have been most generous
in emailing copies on request. If you need specific information,
ask for it and see.

 

[davidallancole]

Thanks for the hint Nelson. I will probably build one in the future, so I will keep that in mind.

I was playing with a variation tonight in PSPICE using a matched dual JFET (LSK389C) and bipolar units. The vas gain device being a sziklai pair to keep the JFET at a lower current then alot. It looks fun and I have the parts to build it, so I may do that after I find a tap to tap my heatsinks to mount the transistors to.

 

[jacco vermeulen]

David,

actually, the real reason his masslessness took the schematics off is to force the flock to cling to their keyboard as not to Pass-out on time window schematics.
Joining in on the global pdf e-mail server is a minor subscription fee for being part of the hood.

 

[davidallancole]

I forgot to add the schematic.

 

[GRollins]

Only one pound?

Bear in mind that fire ants (Solenopsis invicta) are about one millimeter long and weight about as much as a mote of dust. Trust me, a pound (being somewhere in the vicinity of 450 grams) would be hundreds of thousands of critters. It only takes one to ruin your day. A pound would be well above LD 50.

David,
Perhaps I missed something, but if R87 represents the load, you're gonna have a bunch of DC to contend with.

Grey

 

[davidallancole]

Why would there be dc to contend with? Everything gets adjusted so it has ~0mV of dc offset at that node just like a discrete op-amp.

 

[GRollins]

J6's Gate is defined to ground potential. J7's Gate will see some arbitrary DC potential around +7.5V (assuming that the rail is split in half for optimum voltage swing). Were you, perhaps, intending that the speaker should attach to the negative rail instead of ground?

Grey

 

[davidallancole]

Grey, are you seeing something I am not? It sims fine and the dc offset is 25mV at the load. I intended to put the speaker attached to ground.