Hey, cheers
Not sure of a good place for the aluminum
Have seen soft-starts on ebay but it would be better to make one from scratch i bet.
Iv'e just posted a help thread here lol
Not sure of a good place for the aluminum
Have seen soft-starts on ebay but it would be better to make one from scratch i bet.
Iv'e just posted a help thread here lol
So what do you do for multiple P and multiple N channel? Do you just wire in parallel?
Resistors
Can anyone inform me where the red resistors on the circuit boardcan be purchased or who the manufacturer is.
Can anyone inform me where the red resistors on the circuit boardcan be purchased or who the manufacturer is.
hi,
Can't see a picture?
Mouser and digikey got all kinds of them Dales,ohmite's
Try a pic again ,check to make sure it uploads! then submit,just trying to help.
NS
😀
Can't see a picture?
Mouser and digikey got all kinds of them Dales,ohmite's
Try a pic again ,check to make sure it uploads! then submit,just trying to help.
NS
Hi BigE,
Looks like that will work,In nelson's manual he says you will need more PS and possibly to piggie back the small fets for more gain to drive them,reread the article,he outlines it well enough ,IIRC he also tells how he biases them to.
Try this link http://www.firstwatt.com/pdf/art_f5_turbo.pdf
regards,
NS
🙂
Looks like that will work,In nelson's manual he says you will need more PS and possibly to piggie back the small fets for more gain to drive them,reread the article,he outlines it well enough ,IIRC he also tells how he biases them to.
Try this link http://www.firstwatt.com/pdf/art_f5_turbo.pdf
regards,
NS
Hi noSmoking thanks for the reply I have received the information via a PM so I have the info I need.
Pretty sure that was the "kit" from buzzforb's GB. If so the red resistors are PRPs I know that Parts ConeXion sells them.
Your correct they are indeed PRP I am just looking to see if there is a supplier in the UK to save me looking is there a BOM on the forum for the F5T cascoded and non cascoded anyone??
Ian
The F5T document says that the outputs are paralleled. I'm assuming that the store output boards can also be paralleled from a single FE board.
Yes, they can. You need a second set of PCB, but there are connections to add another set of output boards daisy-chained off the first set.
Board for F5T V3 balanced
hi, i want to create my own pcb board for a balanced f5 turbo v3, and i'm struggling with one thing. there will be a single gainstage board, two p-channel boards and 2 n-channel boards. now my question: do i need a GND on the n-channel/p-channel boards? is it bad to have no caps on the n/p-channel boards? i'm very grateful for your answers 🙂 here a picture of the schematics (i know, the p-channel MOSFETS are n-channel MOSFETS, but i'm to lazy to create a new library) f5tbalanced8jwx3y9obz.png auf fotos-hochladen.net
hi, i want to create my own pcb board for a balanced f5 turbo v3, and i'm struggling with one thing. there will be a single gainstage board, two p-channel boards and 2 n-channel boards. now my question: do i need a GND on the n-channel/p-channel boards? is it bad to have no caps on the n/p-channel boards? i'm very grateful for your answers 🙂 here a picture of the schematics (i know, the p-channel MOSFETS are n-channel MOSFETS, but i'm to lazy to create a new library) f5tbalanced8jwx3y9obz.png auf fotos-hochladen.net
Board for F5T V3 balanced
oh, i saw a little mistake, here the correct schematic f5tbalancedewi8ku4m0x.png auf fotos-hochladen.net
oh, i saw a little mistake, here the correct schematic f5tbalancedewi8ku4m0x.png auf fotos-hochladen.net
hi alex
Those look nice ,have you got a set made for proto yet?
I would like to make a set of those when they are proven,lol.
Thanks,
NS
Those look nice ,have you got a set made for proto yet?
I would like to make a set of those when they are proven,lol.
Thanks,
NS
thats a nice layout
and balanced output is possible with two boards.
but i don't like two things.
there is not enough space between the mosfets. if the bias is about 0.8 A/output device, and the railvoltage is about 32 volts, it would be about 200 watt dissipation. For this, i need a bigger distance between the mosfets for large heatsinks.
if two boards are assambled there is no thermal coupling from the "left" channel jfets/cascode to the "right" channel jfets/cascode.
for now i'm finishing the layout for the gainstage board, and post it tomorrow.
maybe someone has a little hint for the n-channel and p-channel boards. i really don't get it, is a cap (about 10 µF) or a gnd on the n-channel and p-channel board a must-have?
and balanced output is possible with two boards.
but i don't like two things.
there is not enough space between the mosfets. if the bias is about 0.8 A/output device, and the railvoltage is about 32 volts, it would be about 200 watt dissipation. For this, i need a bigger distance between the mosfets for large heatsinks.
if two boards are assambled there is no thermal coupling from the "left" channel jfets/cascode to the "right" channel jfets/cascode.
for now i'm finishing the layout for the gainstage board, and post it tomorrow.
maybe someone has a little hint for the n-channel and p-channel boards. i really don't get it, is a cap (about 10 µF) or a gnd on the n-channel and p-channel board a must-have?
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