Can any of the DIY brain trust give me info on function pot or resistor R8. I have them set to 1k or at the half way point of the pot. Is this for adjusting distortion like on the F5T? Thank you in advance.
D1, Q2, R8 & R8' form a constant current source, R8' adjusts the current through the long tail pair (Q1a & Q1b).
Last edited:
Slowly taking shape
The first J Zen board is beginning to take shape. Goal was one channel a week, doing ten minutes here and 30 there. Posting a picture of the unfinished board, which soon will be ready for sink and MOSFETs after verifying all joints (i now see I need to reflow one of the gnd link pads), soldering in signal cables and cleaning it all.
Great boards, fun build so far.
PS: a lot more work remains with the rest of the amp. But slow progress is better than none.
Regards,
Andy
The first J Zen board is beginning to take shape. Goal was one channel a week, doing ten minutes here and 30 there. Posting a picture of the unfinished board, which soon will be ready for sink and MOSFETs after verifying all joints (i now see I need to reflow one of the gnd link pads), soldering in signal cables and cleaning it all.
Great boards, fun build so far.
PS: a lot more work remains with the rest of the amp. But slow progress is better than none.
Regards,
Andy
Attachments
Yup, his father was from Partinico, near my hometown.
Another weirdopalermitanian 😀
@Andy, have you decided your definitive PSU layout?
Another weirdopalermitanian 😀
@Andy, have you decided your definitive PSU layout?
Frank who? 
Should have known the tower of power was a Sicilian idea 
@peppenino: yes. Trannies vertically mounted as in previous post close to front plate. Then 4x47kuF, 4x10mH inductors, then 4x147kuF. Ground planes planned as big long alu plates from first to last cap, with triangular finish and then star or T ground from there. With ground loop breakers x 2 (bridges).
Damn, Mighty! You never told me there was a difference between 500R and 50kR pots! They look exactly the same!
Should have known the tower of power was a Sicilian idea @peppenino: yes. Trannies vertically mounted as in previous post close to front plate. Then 4x47kuF, 4x10mH inductors, then 4x147kuF. Ground planes planned as big long alu plates from first to last cap, with triangular finish and then star or T ground from there. With ground loop breakers x 2 (bridges).
Damn, Mighty! You never told me there was a difference between 500R and 50kR pots! They look exactly the same!
There is allready a proper phrase: Bersekers
Mushroom-high berseker stuffing
Edit: Viking berserkers may have used henbane to induce trance-like state – Ars Technica
Mushroom-high berseker stuffing
Edit: Viking berserkers may have used henbane to induce trance-like state – Ars Technica
Last edited: