PCB for cascoded IXYS CCS (tube)

[revintage]

The board should be able to use for both, otherwise it wouldn´t be a good idea. It is off course possible to run a TO92 DN2540 instead of the LND150. The DN2540 should run at a little higher current though.

 

[gmant123]

Thank you!!!

Alberto.

 

[Gluca]

Yes both the ways are possible. Let me see if I can post an updated schematic and board later today

 

[giupo]

Hi Gluca,

could you please add me to the list?
I´m in for 3 boards.

Thanks
Giupo.

 

[Gluca]

Jaap (Netherland) : 4
gmant123 (Argentina): 10
SigFire (Germany): 4-6
au-trovaille (Netherlands): 4
BDL (Romania): 4
Polin (Italy): 2
Gluca (USA/Italy): 10
Cyteen (UK): 2
Bas (Netherland) : 4
pso (Spain) : 2
Sinuko (Italy) : 4
UnixMan (Italy) : 2
Joseph_k (Hungary/Italy) : 2
guglielmope (Italy) : 2
tony(Philippines) : 6
bravi (New Zealand) : 6 or 12
Dagwood (New Zealand) : 4
10y (Italy) : 6
dr.strangelove3 (Netherlands): 6
siang (Taiwan): 6
Ryssen (Sweden):6
Sugarn (Thailand) : 10
ccliu (Taiwan): 6
Ferrari: 10
PloPla (Italy): 4
heinz1: Germany: 4
Audiofanatic: (The Netherlands) : 20 maybe more!
schuhbu (germany) :6
giupo (Italy): 3

 

[Audiofanatic]

How much do I owe you?

Hi Gianluca,

Can you tell me if I still owe you a few bucks for the fet's I can't open the file you send me.
If it's a surplus, than donate it to DIYAudio or buy yourself a Cinnabon or a scoop of pralines & Cream (Baskin & Robbins). Yummy yummy

Thanks again.

Ciao,

Audiofanatic

 

[Gluca]

here we are. schematic and unrouted brd. the size is still 50x60mm so cost did not change.

you'll see that there is the option for a lower FET in TO220 case. the heatsink is smaller but for higher power we can mount the upper FET underneath the board and use a bigger heatsink.

lars do you comment on the schematic. the caps are 6x13mm. an other option is to make the board larger and include also the bias source (and bigger caps if required)

 

[revintage]

Looks nice, but R1 can´t be used for both channels. Use one for each channel joining at JP2/3.

Keep the size!

R1=470k, C100=1u, R102+P100=1k gives us a theoretical -3dB of 3Hz. If you increase the resistors you can make the cap smaller. But probably there aren´t any physically small enough caps. Think its better to add JP´s and place the caps externally.

Anyway I don´t think the bias source should be included as there are many solutions to that one.

 

[Gluca]

Hi Lars

that's why I kept JP3 and JP4 close to the board edge. I do not expect the voltage across C100 and C200 to be higher than 250V so maybe a properly sized cap is available.

 

[bravi]

No of boards

Hi Gluca,

Now that we have crossed 124 boards requirement I wish confirm my requirements as 12 boards.

Cheers!

bravi

 

[PloPla]

here we are. schematic and unrouted brd. the size is still 50x60mm so cost did not change.

Wow...some more little changes (eg rotate R100 and R200 and a little shift for output pins) and the board could be cut in two single parts.

Not really a problem anyway.

 

[revintage]

Hi Lars,
that's why I kept JP3 and JP4 close to the board edge. I do not expect the voltage across C100 and C200 to be higher than 250V so maybe a properly sized cap is available.

Ooops, didn´t see the double-function of JP3 and JP4.

It´s only a few volts over the cap. But even though I think it will be wider than 6mm. Have to check the catalogues.

 

[pso]

Hi Gluca.

This is the final design ?

Is okay to use TO220 or TO92 in the lower FET , I'm no expert and do not

understand the utility of other changes.

This can work just like the second design ?

The second design was perfect for me.

 

[sugarn]

Hi Gluca,

I'm going to drill the chassis. So I want details of the mounting screws.
Are the mounting screws M3 or M4?
What are the distance between mounting screws?

 

[Gluca]

PSO, you can install Q101 and Q201 or (only one choice) Q101* and Q201*. In other words the lower FET can be either a TO92 case or TO220 so those who did not buy the DN2540 in TO92 case during the group buy can use IXTP all over the board.

Sugarn Wait a few more days when the board is more definitive. Holes are 3.3mm (diameter) so M3 is fine.

 

[cm]

Hi Gianluca,

I am in for 12 boards. Thanks! CM

Jaap (Netherland) : 4
gmant123 (Argentina): 10
SigFire (Germany): 4-6
au-trovaille (Netherlands): 4
BDL (Romania): 4
Polin (Italy): 2
Gluca (USA/Italy): 10
Cyteen (UK): 2
Bas (Netherland) : 4
pso (Spain) : 2
Sinuko (Italy) : 4
UnixMan (Italy) : 2
Joseph_k (Hungary/Italy) : 2
guglielmope (Italy) : 2
tony(Philippines) : 6
bravi (New Zealand) : 6 or 12
Dagwood (New Zealand) : 4
10y (Italy) : 6
dr.strangelove3 (Netherlands): 6
siang (Taiwan): 6
Ryssen (Sweden):6
Sugarn (Thailand) : 10
ccliu (Taiwan): 6
Ferrari: 10
PloPla (Italy): 4
heinz1: Germany: 4
Audiofanatic: (The Netherlands) : 20 maybe more!
schuhbu (germany) :6
giupo (Italy): 3
cm ( Singapore ) : 12

 

[bravi]

List with my updated requirements

Jaap (Netherland) : 4
gmant123 (Argentina): 10
SigFire (Germany): 4-6
au-trovaille (Netherlands): 4
BDL (Romania): 4
Polin (Italy): 2
Gluca (USA/Italy): 10
Cyteen (UK): 2
Bas (Netherland) : 4
pso (Spain) : 2
Sinuko (Italy) : 4
UnixMan (Italy) : 2
Joseph_k (Hungary/Italy) : 2
guglielmope (Italy) : 2
tony(Philippines) : 6
bravi (New Zealand) : 12
Dagwood (New Zealand) : 4
10y (Italy) : 6
dr.strangelove3 (Netherlands): 6
siang (Taiwan): 6
Ryssen (Sweden):6
Sugarn (Thailand) : 10
ccliu (Taiwan): 6
Ferrari: 10
PloPla (Italy): 4
heinz1: Germany: 4
Audiofanatic: (The Netherlands) : 20 maybe more!
schuhbu (germany) :6
giupo (Italy): 3
cm ( Singapore ) : 12

 

[sugarn]

Gluca,

What is the maximum width and height space of the heatsink?

 

[pso]

Hi Gluca.

Understand the change for the FET ,

I meant to C100 , C200 and R1.

 

[Gluca]

PSO,

the coupling cap C100 and C200 will be most probably off board. R1 is optional too if you want to use the board as a VCCS as Lars was explaining. I'll post more updated schematics/board this afternoon if I can draw something during the lunch break.

Sugarn this is the typical heatsink you want to use. There are different heights (for different max dissipated power)

Digi-Key - HS403-ND (Manufacturer - 513002B02500G)

please note that the heatsink must be 0.5" x 1.375" and not bigger. there are many versions that are larger than that. height does not matter.