Nelson Pass said:
I knew it!
steenoe said:
Maybe that's good luck. Most probably two 27's in parallel work better than a single 10 ohm resistor...
Vix
😉
Damn, this look's good (and easy 😀 ) - BUT i was planning to make my future upcomming 2x F4 balanced mono-bloks. But as i see it, it is not possible to make this circuit balanced (unbal to bal converter is my only need through! as i only intend to run the signal balanced from pre ---> Poweramps).
Any suggestion's 😕
Nelson Pass, i think you know the solution to this, what does it take for you tell hehe... ? 😎
Thank's anyway for this great forum.
Jesper.
Any suggestion's 😕
Nelson Pass, i think you know the solution to this, what does it take for you tell hehe... ? 😎
Thank's anyway for this great forum.
Jesper.
steenoe said:
Hi steenoe,
please help me understand how did you drive F4 to clipping with this preamp. Its power supply is 18V and it cannot be swinging more than 5-6V peak. It takes 20V peak to drive F4 to clipping.
Maybe I'm missing something?
Thanks
lykkedk said:
really piece of cake, but count on few additional things:
negative supply
doubling number of jfets (hehe - that's funny) to make LTP
CCS for tail of that LTP
at least one stereo pot per channel, if not balanced stereo pot
and you're there - balanced jfet BOZ
juma said:
You are probably right. It was more likely the speakers that were tortured. In any case the J-fet BoZ can play more than loud enough with the F4. The speakers are Abby-clones with Fostex FE166's.
Jesper, take a look at the Pumpkin-mans
latest creation also🙂 It should have gain and voltage swing enough for the F4. Very promising......Steen🙂
The Pumpkin
Lookie lookie, whats my dog doin' over there???😀
Poor confused thing, what happend back there?? Fart or something ?
Ratata
Magura said:
Yes your probably right, might make this preamp to get something finished should be possible - i think i'll make it in 1 hour just to beat "Lucky" Steenoe😀
ROVSING said:
If you do the footwork, and go buy two cordless powerdrills, you can make one in like 30 minutes 🙂
The reason to buy two is that you use one charger for actually charging the batteries (you can get el-cheapo chordless drills sporting 18V), and one for building the amp in. The all you need to do is to swap the batteries from the charger to the preamp (which has a socket for the batteri since it's the box from the second charger), and off you go 🙂
Magura 🙂
And that way you would beat Steen by far, as yours would be finished and in a box and so forth 😉
Magura 🙂
Magura 🙂
Magura said:
Good idea. He is never gonna beat me. I can slow him down cause he needs the J-fets from me😀
Ups, forget them accidentally😀Manu, you can just as well get used to that, when Magura is playing along😉
Witch one of the Daltonbrothers do you want me to change your avatar to ?steenoe said:
Good idea. He is never gonna beat me. I can slow him down cause he needs the J-fets from me😀
You know me Steenoe, i could fill my walls with unfinished PCB's that i have laying around😀
I never put on the saddle the same day as i ride..
ROVSING said:
Keep the dog, it gave me a good laugh🙂
Do you put the saddle on the day after the ride? I think thats a bad idea🙂
As for the Daltons, Magura is the obvious choice as Joe😀 But I dont hope he ever change that avatar of his.
Steen🙂
LAZY BOY HERE....
Any opinion as to whether this could be used as a unity gain buffer of sorts - with good results?
- or look elsewhere for simple
Basically I am thinking of playing with PLLXOs, but I'm thinking it might be better to stick the PLLXO between the pre and a very simple buffer - so I can swap amps out.
with ~105dB drivers this battry stuff turns me on
and
just tryin to keep opamps out - for the heck of it...
Any opinion as to whether this could be used as a unity gain buffer of sorts - with good results?
- or look elsewhere for simple
Basically I am thinking of playing with PLLXOs, but I'm thinking it might be better to stick the PLLXO between the pre and a very simple buffer - so I can swap amps out.
with ~105dB drivers this battry stuff turns me on
and
just tryin to keep opamps out - for the heck of it...
mpmarino said:LAZY BOY HERE....
Any opinion as to whether this could be used as a unity gain buffer of sorts - with good results?
- or look elsewhere for simple
Basically I am thinking of playing with PLLXOs, but I'm thinking it might be better to stick the PLLXO between the pre and a very simple buffer - so I can swap amps out.
with ~105dB drivers this battry stuff turns me on
and
just tryin to keep opamps out - for the heck of it...
lazy boy.........few posts upstream,before dangerman's pic
Yup, lazy boy saw that. Lazy boy wants to be lazy - er and use the same v+.
OK, hows about lowering the gain on jfet boz >PLLXO>another lowered gain jfet boz>amp?
Lineup went thru some calcs earlier but he lost me somewhere in the middle .
OK, hows about lowering the gain on jfet boz >PLLXO>another lowered gain jfet boz>amp?
Lineup went thru some calcs earlier but he lost me somewhere in the middle .
mpmarino said:Yup, lazy boy saw that. Lazy boy wants to be lazy - er and use the same v+.
OK, hows about lowering the gain on jfet boz >PLLXO>another lowered gain jfet boz>amp?
Lineup went thru some calcs earlier but he lost me somewhere in the middle .
me not see lineup...........my neck is blue
make exact same stage
put 10k as gate stoper
return 10K from output side of output cap to gate
ya have buffer
phase?
try............ when you want simple supply