Hi Chokey! I’m finally going to finish my bridged f4 monoblocks. You know what that means…? Pumpkin! I’m only 14 years late. I know you have some old dusty boards hiding somewhere just waiting for a greedy boy!
No really, what’s the chance I can get some one-offs made?
Cheers!
No really, what’s the chance I can get some one-offs made?
Cheers!
need to check
though, planning new version, as soon I find time
fully DC coupled, easier to make
though, planning new version, as soon I find time
fully DC coupled, easier to make
Power suply is quite exeptional!
EI trafo 230/230 for balanced in.
Toroid 200W, 4×45V with electrostatic barrier and magnetic schild.
Four time schotky gretz, RC, duble choke, polypro 4,7uF, duble choke, polypro, MUNDORF electrolitic 10000uF.
Four time separate 60V and graund is separate to the preamp!
EI trafo 230/230 for balanced in.
Toroid 200W, 4×45V with electrostatic barrier and magnetic schild.
Four time schotky gretz, RC, duble choke, polypro 4,7uF, duble choke, polypro, MUNDORF electrolitic 10000uF.
Four time separate 60V and graund is separate to the preamp!
Attachments
For people who is not finished project have some suggestions!
Layout of printed circuit bord is phenomenal! But, there is some bad metalized thru-hole.
On Shunty capacitor C9 and C9A.
On Pumpkin resistor R5 and R6 for NFB.
It is marked on scheme!
Signal going from one side bord to other thru metalized holes.
You must better soldering and make wire bridges point to point!
Layout of printed circuit bord is phenomenal! But, there is some bad metalized thru-hole.
On Shunty capacitor C9 and C9A.
On Pumpkin resistor R5 and R6 for NFB.
It is marked on scheme!
Signal going from one side bord to other thru metalized holes.
You must better soldering and make wire bridges point to point!
I took over a members defective Pumpkin/Shunty project and vaguely remember a couple of pcb issues that were a little time consuming to figure out. It was like 12 years ago so I can't remember exactly what was done. It was one of my "never finalized" projects. Those boards are still in my basement workshop with a nice layer of dust.. Anyone interested in them? Shoot me a PM.. 🙂
Pumpkin/ Shunty with a adequate power supply is very, very god preamp!
I am listening them for a few weeks.
Sounds fluid with god treble, tight bass, analytic, but musically!
For my F4 mono blocks is just perfect.
I am listening them for a few weeks.
Sounds fluid with god treble, tight bass, analytic, but musically!
For my F4 mono blocks is just perfect.