Gsoz-t

[carpenter]

It's amazing how much easier it is to think after some sleep. I appreciate Grey's situation.

Turns out I forgot to adjust the bias resistance to the zener reference. The schematic is set up for 30 volts, not 12--which is what I'm using. So, I dropped that sucker down from 10k to 1.5k and now I HAVE SOUND. Very good sound, judging from my little test speaker.

I'll let her run awhile and then hook up to one of my horns. This could be a match made in heaven.

John

 

[Magura]

You will want to cascode those J-FET's.....that's the ticket to quite alot of power and the same sound signature. I made one of those a while back....the best so far IMHO.

Magura

 

[carpenter]

Cascoding sounds like a great idea. What's keeping me from going all out, though, is the fact that the heat levels in my jfet ZV7-T are minuscule compared to the larger transistor models.

I'll be experimenting with cascodes soon. This concept will work well with the midbass speakers.

John

 

[carpenter]

Hey John Nice to here from you...
...So, as long as we are off thread here, when should we expect the latest release of a pass pre project??? I have to clean off the table for that one.

I've fabricated this--I now have three pcbs, and that will give me 2 channels each: