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Old 30th August 2013, 07:21 AM   #11
bekim is offline bekim  Albania
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Quote:
Originally Posted by Gost22 View Post
Hi Bekim!
Here schematic quality power supply for yours Aikido tube preamp!
Enjoy!
Gost22,

I am considering schema you provide.
Do you apply any heatsink to transistors? My transformers output is 200V AC, I=~100 mA, and I need output 240 - 250V DC.

Thanks
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Old 30th August 2013, 10:55 AM   #12
Stixx is offline Stixx  Germany
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Quote:
Hi Stixx!
That the DC input voltage (Vin =?) should be on this circuit for the output to be get Vout = 250Vdc.
Is STW13NK60 (IRFS450) can be replaced with IRF830?
Input voltage should be about 20V higher than the desired output, so ~ 270V.
Don't know about IRF830.... the classic IRF840 would be better.
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Old 31st August 2013, 04:30 AM   #13
Gost22 is offline Gost22  Bolivia
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Hi Beikim!
Use 2 a transformer, Tr1 of 15 .. 20VA with second hand of 13 ... 16Vac for power supply heater tube and other transformer Tr2 of 4 ... 6VA the second hand of 12Vac. The latter connect with PRIMARAR the first secondary transformer of 15Vac, so that otherwise get around 220V.... 240Vac for voltage + B node tube. (See schematic Figure-1).
cheers!
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File Type: jpg Power supply-1.JPG (22.3 KB, 393 views)
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Old 31st August 2013, 04:41 AM   #14
Gost22 is offline Gost22  Bolivia
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Originally Posted by Stixx View Post
Input voltage should be about 20V higher than the desired output, so ~ 270V.
Don't know about IRF830.... the classic IRF840 would be better.
Hi Stixx!
See table below:
thanks!
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File Type: jpg STW13NK60.JPG (30.6 KB, 354 views)
File Type: jpg IRF830.JPG (44.4 KB, 345 views)

Last edited by Gost22; 31st August 2013 at 05:04 AM.
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Old 31st August 2013, 05:39 AM   #15
Gost22 is offline Gost22  Bolivia
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Bekim, if you want to complete a quality tube pre-amp I recommend this to with ecc88. Not very expensive for design, but provide great tube sound!
Enjoy!
Cheers!
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File Type: jpg Tube preamp with 6DJ8 - Schematic.JPG (111.2 KB, 369 views)

Last edited by Gost22; 31st August 2013 at 05:50 AM.
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Old 31st August 2013, 06:56 PM   #16
bekim is offline bekim  Albania
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Gost22.

Thank you for schematics and information provided. Nice design and looks cool.
What I like most is timer.. ;-) I think is set 30 seconds as delay.
Great!
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Old 1st September 2013, 03:58 AM   #17
Gost22 is offline Gost22  Bolivia
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Bekim, if you do this tube pre-amp on this schematic, the articles are you satisfied with its tube sound?!
Good luck!

Last edited by Gost22; 1st September 2013 at 04:04 AM.
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Old 9th September 2013, 09:14 AM   #18
bekim is offline bekim  Albania
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Originally Posted by Gost22 View Post
Bekim, if you do this tube pre-amp on this schematic, the articles are you satisfied with its tube sound?!
Good luck!
Gost22,

I put together this circuit and if I want to add choke in output like 10H, do you think this is proper connection of the choke?


thanks

HVPSU.JPG
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Old 18th September 2013, 01:00 PM   #19
bekim is offline bekim  Albania
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Anyone thinks is good place to put choke as marked on schematics...???

Appreciate your feedback.
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Old 19th September 2013, 12:21 AM   #20
Gost22 is offline Gost22  Bolivia
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Originally Posted by bekim View Post
Anyone thinks is good place to put choke as marked on schematics...???

Appreciate your feedback.
The inductance of the coil (L1) can be 10 .. 20H for current> 100mA
Regards
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