JfetBOZ mods

Choky, you're quite the fellow!😀 Someone I would gladly call a friend.

John

BTW, I had thought of susy, but also thought of the diy opamps tutorial and Aleph series, in my case the F4 could send feedback to jfet diff pair input (which ever one doesn't howl!😀 😉 😀 )

It's so much fun. I woke up dreaming the other morning, and in my waking up dream, I was calculating amperage on a source resistor.😀
 
carpenter said:
Choky, you're quite the fellow!😀 Someone I would gladly call a friend.

John

BTW, I had thought of susy, but also thought of the diy opamps tutorial and Aleph series, in my case the F4 could send feedback to jfet diff pair input (which ever one doesn't howl!😀 😉 😀 )

It's so much fun. I woke up dreaming the other morning, and in my waking up dream, I was calculating amperage on a source resistor.😀


well - there is another one for ya :

http://www.diyaudio.com/forums/showthread.php?postid=1384561#post1384561

edit:

if you buy me a coffee on next BAF , ya can call me a friend.......... just because I drink coffee only with friends :rofl:
 

Attachments

  • last watt f4.jpg
    last watt f4.jpg
    47.8 KB · Views: 612
Babowana said:
You will be more happier with this.



:darkside:


I'll try increasing C3's value; I might as well play with the current, too.

So you didn't like that extra little C4 filter? I changed the cap value on it to 0.001uF--it reminds me of the little fellow Nelson uses in his Aleph series.

I tried using the PS that feeds my F4, 23-0-23, CRC. It was very noisy. The pre is much happier with a regulated supply. I'll have to purchase me a higher voltage unit.

Thanks for taking the time to share.🙂
 
Marvelous thread!!The question arises as to the amount of reactance required here . Is that even a factor?? Or are we just interested in current carrying abilities.?? Are there any limits?? Any guidelines you may offer would be appreciated.

Who knows ,I may have missed something somewhere!!😕
 
carpenter said:
Hot dam!!😀

Now there's a treasure.🙂

Now I see why I need more negative voltage; I had considered raising the zener voltage, but didn't see an obvious tutorial example to go beyond 9.1 volts. Wow, so cool.


:rofl:

sometimes you really not read careful enough :


ZM:

.........so - if you use greater neg voltage , you can also use zenner with greater voltage (say 27V , whatever) and calcualte adequate resistor .... (watch at dissipation of that resistor) ...... that way you increase dynamic resistance of sayed CCS

put 10k resistor between gate resistor and zenner ; put cap from gate resistor to gnd
 
sandstorm33 said:
Marvelous thread!!The question arises as to the amount of reactance required here . Is that even a factor?? Or are we just interested in current carrying abilities.?? Are there any limits?? Any guidelines you may offer would be appreciated.

Who knows ,I may have missed something somewhere!!😕


I'm just an ol' county boy out playing with the wonderful toys that Nelson and the boys offer, so I can't relate to reactance. I just used a low resistance transformer with plenty of inductance. When I downsize that tranny, I'll be looking for up to 1H with as low a resistance as I can afford. I.e., bigger wire lowers resistance, but makes for a more expensive transformer.

I based my choke idea on the ZV7-T experiments/tutorial. It has been an amazing journey.