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Tony's latest traffo DIY build
Tony's latest traffo DIY build
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Old 31st January 2018, 02:53 AM   #1001
TonyTecson is offline TonyTecson  Philippines
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Tony's latest traffo DIY build
a pair of OPT's and power traffo for an ucpoming 2A3 set build...
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Old 22nd February 2018, 11:48 PM   #1002
engel dela pena is offline engel dela pena  Philippines
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im planning to build 330-0-330 with 6.3 ct using 2x el84 and 2x12ax7 and uf4007 bridge config,i found this site sir tony............Calculate Tube Amp Power Transformer Current
i tried and get this result
Selected transformer voltage: 325-0-325

Calculated voltage at first capacitor (B+): 445.25V. Subtract 6V, if using choke.

Calculated filament current (typically the 6.3v secondary): 2.18A

Calculated current: 62.56mA at 16521R calculated load (10% plus factored in). Preamp valves current draw is estimated at typical 12AX7 max dissipation of 1.2W at 330V, i.e. 3.6mA per triode


what available core can i use?deeco ordinary cores
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Old 23rd February 2018, 02:56 AM   #1003
TonyTecson is offline TonyTecson  Philippines
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Tony's latest traffo DIY build
deeco cores are okey, surplus cores can be better, you can also get them from Edrel Sison, he is on facebook...h18 or rm 18 or z11...
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Old 23rd February 2018, 03:12 AM   #1004
engel dela pena is offline engel dela pena  Philippines
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thanks kuya tony
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Old 26th April 2018, 12:07 PM   #1005
sanbadgujar is offline sanbadgujar  India
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Default New Build

Hello Tony sir

I am going to build New toroidal transformer core dimension are as follows.
OD- 140mm
ID - 90mm
Ht - 50mm
Window area mm2 - 6358
Effective cross-sectional area mm2 - 1187

A core is an M4 grade (strip thickness 0.30mm, core weight around 3.3Kg)
upon My calculation core is maximum 1100VA.So winding details as follows. Mains supply - 230v/50Hz
secondary Voltage req- 65-0-65
TPV- 2.53
Avareg turn length-160mm
Primary turn- 581, Length - 93M
Primary Current- 4.86A
Di of primary magnet wire- 1.63mm
Secondary Turn - 165( dual magnet wire for 65-0-65v) ,Lenth- 53M
Secon Current- 8.6A
Di of secondary magnet wire- 2.34mm
Window used by Primary(mm2)- 1545
Window used by Secondary(mm2) - 1800
Total Copper req - 4.5Kg
Copper area mm2- 3180

Magnet wire is SWG
Is upon this calculation My toroidal Transformer give me 65-0-65(8.5A)/ 1100VA or not, please help and currect if I miss somethink

Thanks
Best regards

Last edited by sanbadgujar; 26th April 2018 at 12:11 PM.
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Old 29th May 2018, 10:30 PM   #1006
TonyTecson is offline TonyTecson  Philippines
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Tony's latest traffo DIY build
please post pictures of your finished traffo...
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Old 29th May 2018, 10:43 PM   #1007
TonyTecson is offline TonyTecson  Philippines
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Tony's latest traffo DIY build
gathering irons for an upcoming 6C33c SET amp build....
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File Type: jpg IMG_0714.jpg (737.1 KB, 163 views)
File Type: jpg IMG_0715.jpg (928.2 KB, 152 views)
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Old 21st June 2018, 08:37 AM   #1008
saminnografix is offline saminnografix  Philippines
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Default 2KVA

Quote:
Originally Posted by saminnografix View Post
i thought that too but first, are my computations possible (power:core) ratio?
secondly the way i look at it as i have samples of number 14 wire
in a window of 1"x3" less the bobbin roughly i would take 7/8 x 2 3/4 allowable winding area, so based on actual #14 magnet wires can turn up to 38 in a 2 3/4 bobbin size. I multiplied 38 x 5 = 190, and 5 turns of #14 occupies about 3/8 of an inch.
next the available window left was 1/2 x 2 3/4 unfortunately i do not have #11 sample but as i look into your table turns per linear inch
enamel D.S.C. or S.C.C. D.C.C
#14 15.0 14.20 13.8 i used 14 turns per linear inch as presumption = it works
#11 10.7 10.3 9.8 i used 9 since i do not have sample to compare with.
the bottom line here are my interpretation and calculations based on your table correct?

thanks
regards
Quote:
Originally Posted by TonyTecson View Post
the coil build up is what we look at, if that fits then you can go...

#14 has a diameter of 1.63 mm
#11 has a diameter of 2.3 mm

so how many layers for primary?
how many layers for secondary?
this will guide you to make the final decision...
GOOD day sir tony as i have ask before from this thread, (referring to post #967) now i have made the final traffo. it's quite interesting. the traffo was under curing in about 48h now, maybe i will plug it with no load as i get home tomorrow. i have successfully wind number 14AWG and number 11AWG secondaries with 65-0-65vAC. and i have got some vacant space so i have added about 20v+20v to be used for Class H later. here are some documentations

thanks
sam
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Old 11th August 2018, 12:55 AM   #1009
TonyTecson is offline TonyTecson  Philippines
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Tony's latest traffo DIY build
BIG Traffo now complete.....2.25 center leg stacked to 6 inches.....58 lbs beast...
@240 vac primary, secondaries are 2 x 60, 2 x 72, 2 x 12, 1 x 15 volts auxiliary windings....
primary winding is electrostatically shield..
this beast can provide huge amounts of power, for rectifiers i will be using 2 x 72 amp bridge rectifiers and for filter caps, 2 x 68k ufd.100vdc in parallel with 4 x 47k ufd.100v filter caps...fixing bolts are 6mm diam, nylon shoulder washers are used...
Attached Images
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Old 11th August 2018, 09:21 AM   #1010
Kay Pirinha is offline Kay Pirinha  Germany
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And for your next project you're gonna do a pole transformer, don't you ?


Best regards!
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