I get too emotionally attached to things that take me so long to build to let go of them.
Taking baby steps down the amp building path to big boy amps.
Add that to greedy boy toy store grabbing every time Pa or Zen comes up with a new idea and it's like sitting in a diner at 3 AM after a hard night of partying and trying to figure out what to order from a 15 page menu...everything looks good and your just not thinking clearly.
I've got too many things hoarded and no idea what to build next...including two different takes on the J2 circuit...and now there's an even betterer version?
Sheesh.
Taking baby steps down the amp building path to big boy amps.
Add that to greedy boy toy store grabbing every time Pa or Zen comes up with a new idea and it's like sitting in a diner at 3 AM after a hard night of partying and trying to figure out what to order from a 15 page menu...everything looks good and your just not thinking clearly.
I've got too many things hoarded and no idea what to build next...including two different takes on the J2 circuit...and now there's an even betterer version?
Sheesh.
I believe he talked about those high power SIT's at one of the BAF. It appears he is getting close to a product.
Ahh haha I was thinking the same thing...will Papa be releasing the official J2 schematic to us here soon? 😀
But I guess I'd have to sell my left kidney for some SemiSouth JFETs to get all the components for a J2 😱
Well Papa said in the video that he’s going to stop producing the J2 here pretty soon. I don’t recall him mentioning the F7, so he may still be producing it for awhile.
idk - sounded to me that the F8 is a CFA ? Unless I misheard (which happens frequently admittedly)
ACA is a voltage feedback amp iirc.
ACA is a voltage feedback amp iirc.
You're right....it could be that the feedback is connected to the source of the JFET...?
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it sounds to me like its a j2 without degradation. Could the lower output (20 watts vs 25 watts) be explained by dropping the parallel input stage, ie just one 2sj74?
Would the only feedback in the circuit be the cfa and the constant current sources?
Also there was some break up in the videos audio, but it sounds to me like papa Pass said it wont have any higher distortion above 2nd. And that 2nd order distortion would be negative phase.
Would the only feedback in the circuit be the cfa and the constant current sources?
Also there was some break up in the videos audio, but it sounds to me like papa Pass said it wont have any higher distortion above 2nd. And that 2nd order distortion would be negative phase.
Feedback goes to Source pin of input Jfet.
Actual rated power is 25 into 8 and 18 into 4, slightly more than J2.
2nd harmonic, negative phase.
🙂
Actual rated power is 25 into 8 and 18 into 4, slightly more than J2.
2nd harmonic, negative phase.
🙂
Although you could easily make a CFA input biased by a constant
current source, you are correct in that there is no CCS for the front end.
current source, you are correct in that there is no CCS for the front end.