About one year ago, I built a F6 amp. I used the PCB from diyaudio with a little modify, unfortunately my heatsinks are too short so I must cut the PCBs and wiring interstage transformer
Some images to show and hope all of you like it!
About me, I always love these images because I built this amp at my old home that I was live for 31 years
Some images to show and hope all of you like it!
About me, I always love these images because I built this amp at my old home that I was live for 31 years
Beautyful F6 build !
Congratulations Nagini262
You are fearless amp builder
ps . what about sound if compare with Vfet's amplifiers ?
When I finish my F6, I think this is one of the best amp I've ever made but after that, I build the Sony VFET P2 and as I said, Sony VFET P2 is the best
Nicely assembled . nice workmanship
Immediate impression is the Helluvalot of additional Complexity tho.
Imo it seemingly goes against the KISS basis of the design.
As pointless digression;
there are 'other' solutions to a too short Heatsink, beyond sawing off bits of the PCB...
remembering that Only the irfp240's needs be on the sink
Immediate impression is the Helluvalot of additional Complexity tho.
Imo it seemingly goes against the KISS basis of the design.
As pointless digression;
there are 'other' solutions to a too short Heatsink, beyond sawing off bits of the PCB...
remembering that Only the irfp240's needs be on the sink
I think he has speaker protection and soft start in there. Maybe he has speakers he wants to protect?
I must fix the chassic with the heatsink so my chassic size is not good and of course the mica insulator is better blue insulator
The amp running very hot so the fan is necessary
Beautiful chassis work, but also very densely populated internally. Ample vents on the bottom to draw in cool air under the toasty bits?
BK
Yes, you right! The bottom is so close, I can not drill some holes for air flow
F6 different transformers
Hello Passlab's people
I am thinking of making a new poweramp. reusing my old chassis, capable of dissipating around 200w (AlephJ/F5 etc...)
So i swapped some drivers with some transformers, which i would have been using for the shade enabled poweramp.
I can see, that those transformers are much like the original Jensen F6 transformers, and my quistion is, if i can use them for the F6 ?
I hope somebody a little more experianced into transformers than me, would take a look at the attached two .pdf?'
Jesper.
Hello Passlab's people
I am thinking of making a new poweramp. reusing my old chassis, capable of dissipating around 200w (AlephJ/F5 etc...)
So i swapped some drivers with some transformers, which i would have been using for the shade enabled poweramp.
I can see, that those transformers are much like the original Jensen F6 transformers, and my quistion is, if i can use them for the F6 ?
I hope somebody a little more experianced into transformers than me, would take a look at the attached two .pdf?'
Jesper.
Attachments
I'am lucky enough?
Directly from Linear Systems.
LSJ74A x 24 and LSK170A x 24
That's for replacement in my F6 amplifer.
Question: do i need to match them or i can use grade A with grade B, or better A with A without doubt?
This is from build thread
If they need to be within 2,5 - 6,5mA range (LSK170A) or more i dont know through?
Jesper.
lykkedk
As i understand transistors have A,B,C,D grades with different idss in each grade and where A is lowest noise with idss 2,5 - 6,5 mA, so as i understand (i can be wrong maybe) you need to get one grade and match them to difference of each other not more than 10%. that 2,5 * 0,10 = 0,25 mA. I'am right?
As i understand transistors have A,B,C,D grades with different idss in each grade and where A is lowest noise with idss 2,5 - 6,5 mA, so as i understand (i can be wrong maybe) you need to get one grade and match them to difference of each other not more than 10%. that 2,5 * 0,10 = 0,25 mA. I'am right?