F3 Builders Thread

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#267
To ma_coule: you have the same PCB´s what will be your solution?

I think to may be start a own thread for the power supply just for this amp, it seems a lot of peaple get trouble with this specific piece especialy with the 230V.

For now I think the best solution would be to get a ps pcb from Peter Daniel, as much as I regret it the PCB I have would realy need adjustments...
 
#268
imagios said:
To ma_coule: you have the same PCB´s what will be your solution?

For now I think the best solution would be to get a ps pcb from Peter Daniel, as much as I regret it the PCB I have would realy need adjustments...
Click to expand...

Following Jameshillj and you we have next possibilities: (Sudss, PDaniel's, CViller's, the last one is my "flying" PSU of SE amp Death of Zen - upon Rod Elliott's project)
Hm? 😕
 

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#269
I have yesterday ordered the new ones from Peter Daniel.
Here is a list of components for them I put toggether from other threads:

Transfo 1 330VA - 2x18VAC SE-RKT 330 - 2x18 - 9.16A
Bridge Rectifier 2 35A - 200V TO-220/247 - Faston MB508
R1 to R8 4 0.47R - 3W 0.47 - MOX04 - 4W
R9 - R10 2 2.2K - 3W 2.2K - 3W
C1 to C8 8 15000*F - 25V 25V min
C9 1 .0033*F/250v Line Filtering - .0033*F/Line (.0022*F)
Fuse 1 1.25A - Slow Fuse
TH1 - Thermistor 1 5A - 10R - 25° Ametherm SL22 10005 - CL60 type

regarding the bridge rectifier, there will be an other solution comming with the PCB´s
see here:
http://www.diyaudio.com/forums/audio-sector/149672-universal-power-supply-pcb.html

I will definately leave Suds, PS PCB...
 
#270
imagios said:
I have yesterday ordered the new ones from Peter Daniel.
Here is a list of components for them I put toggether from other threads:
Transfo 1 330VA - 2x18VAC SE-RKT 330 - 2x18 - 9.16A
C1 to C8 8 15000*F - 25V 25V min
Click to expand...
Hi Daniel,
If you go with P Daniels PSU PCB than, please, check C1 to C8 caps voltage.
You are now on higher voltage!

Transformer's data are a bit unclear (even to me). 😉

:cheers: & for fun!
 
#275
Serious effort going into your amp, ma - certainly should work really well!

If you want to really "Turbo charge" this amp, replace the 220uF electros C2, 3 and 4 with film caps.

I am currently using C2 = 33uF Auri - C3,4 = 44uF Russian K73-16 with MKP 1u5 Siemens B32654.
Each of the C5,6,7 have 22uF of the K73-16 across the 220uF Nichicon KZ.

R11, 18 are now high quality resistors (and R15 is next) - highly recommended.
 
#276
jameshillj said:
Serious effort going into your amp, ma - certainly should work really well!

If you want to really "Turbo charge" this amp, replace the 220uF electros C2, 3 and 4 with film caps.

I am currently using C2 = 33uF Auri - C3,4 = 44uF Russian K73-16 with MKP 1u5 Siemens B32654.
Each of the C5,6,7 have 22uF of the K73-16 across the 220uF Nichicon KZ.

R11, 18 are now high quality resistors (and R15 is next) - highly recommended.
Click to expand...
jameshillj,
thank you very much for your friendly cooperation!

:cheers: & for fun!
 
#280
Hi @ll,

i've got a question about resistor values for the F3. Sadly most of the "voodoo"-Parts like Riken, AN-Tantals are only aviable in E12. it is possible to come close to a value if i parallel 2 resistors but the question is: It is necessary? There are especially two parts which I'm interested on: R1 and R2 which are in the signal path/NFB. R1 is 9,09K - so the usage of 9.1K would be a difference way below 1%. R2 is 47,5K - so 47K would be a difference of about 1%.

Would the usage be crucial?

All your Feedback is appreciated!

Galac

p.s. my english isn't that well but i hope it works ;-)
 
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