Tony's latest traffo DIY build
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
AndrewT
R.I.P.

Join Date: Jul 2004
Location: Scottish Borders
Quote:
 Originally Posted by saminnografix sir tony may i ask if i can get 1500VA on the following toroid? OD = 8" ID = 3" H = 6cm i do not have a concrete formula on toroid... thank you sam
Try winding on a part of your proposed primary.
Say 200turns and then test it via a Variac to see how much current passes through that primary winding.
Plot the Ip vs Vp curve and see the typical "S" shape. Determine the maximum voltage that 200T primary can take without getting too hot (high current).

From that you can work out how many primary turns you will need to react againt the MAXIMUM voltage you have at home.
__________________
regards Andrew T.

 10th October 2017, 08:35 AM #962 saminnografix   diyAudio Member   Join Date: Nov 2016 Location: kidapawan thank you so much sir... GodBless...
TonyTecson
diyAudio Moderator

Join Date: May 2003
Location: Palatiw, Pasig City
500 VA isolation traffo for my bench top...230 volt primary to 0 to 100, 115, 230 volt secondaries...
Attached Images
 IMG_8931.JPG (459.1 KB, 258 views) IMG_8932.JPG (733.9 KB, 254 views) IMG_8935.JPG (447.8 KB, 195 views) IMG_8936.JPG (381.4 KB, 187 views) IMG_8937.JPG (310.1 KB, 184 views) IMG_8938.JPG (445.3 KB, 101 views)
__________________
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B

TonyTecson
diyAudio Moderator

Join Date: May 2003
Location: Palatiw, Pasig City
with end bells installed....

An externally hosted image should be here but it is no longer accessible. Please upload images instead of linking to them to prevent this.
Attached Images
 IMG_8940.JPG (673.5 KB, 30 views)
__________________
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B

 14th November 2017, 06:48 AM #965 saminnografix   diyAudio Member   Join Date: Nov 2016 Location: kidapawan traffo sir tony may i ask another proposed project. 2"CL x 5" weight about approx.15.2 kg prim. #14 AWG 230v @0.8t/v = 184t sec. #11 AWG = 60Vac -0- 60Vac thanks sam
 14th November 2017, 07:11 AM #966 TonyTecson   diyAudio Moderator     Join Date: May 2003 Location: Palatiw, Pasig City calculate if your chosen wires will fit inside the 1 in x 3 inches winding window... way i look at it, more like #15 primary and #12 secondary... __________________ planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
saminnografix
diyAudio Member

Join Date: Nov 2016
Location: kidapawan
Quote:
 Originally Posted by TonyTecson calculate if your chosen wires will fit inside the 1 in x 3 inches winding window... way i look at it, more like #15 primary and #12 secondary...
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

 14th November 2017, 08:02 AM #968 TonyTecson   diyAudio Moderator     Join Date: May 2003 Location: Palatiw, Pasig City 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... __________________ planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
saminnografix
diyAudio Member

Join Date: Nov 2016
Location: kidapawan
Quote:
 Originally Posted by TonyTecson 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...
ok sir thank you for the quick reply
i used english system as i saw it on your table

using metric 25mm x 75mm
#14 actual size at hand was 1.83 into (75mm) 70mm on bobbin 70/1.83 x 5 layers = 191 turns
5 layers x 1.83 = 9.15 or 10mm
for #11 i used the next size guide say for example 2.7mm
#11 @ 2.7mm into a 70mm area will allow 25turns per layer, it needs about 4 layers that will also occupy 10.8mm
that is 9.15 + 10.8 mm = 20mm

by the way i am ordering #11 wire sample to have final measurement.

thank you sir.

 14th November 2017, 08:32 AM #970 TonyTecson   diyAudio Moderator     Join Date: May 2003 Location: Palatiw, Pasig City 20mm is too tight, remember that calculations do not take into account winding factor, if your calculations give you 20 mm as build up, do not count that that will be the actual buildup once you start winding, that is why i always end up with one size lower, better safe than sorry... but if you can squeeze them in, why not? use mandrels and a big vise to flatten the coils so it fits...or g-clamps cam be used... __________________ planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site     Site Announcements     Forum Problems Amplifiers     Solid State     Pass Labs     Tubes / Valves     Chip Amps     Class D     Power Supplies     Headphone Systems Source & Line     Analogue Source     Analog Line Level     Digital Source     Digital Line Level     PC Based Loudspeakers     Multi-Way     Full Range     Subwoofers     Planars & Exotics Live Sound     PA Systems     Instruments and Amps Design & Build     Parts     Equipment & Tools     Construction Tips     Software Tools General Interest     Car Audio     diyAudio.com Articles     Music     Everything Else Member Areas     Introductions     The Lounge     Clubs & Events     In Memoriam The Moving Image Commercial Sector     Swap Meet     Group Buys     The diyAudio Store     Vendor Forums         Vendor's Bazaar         Sonic Craft         Apex Jr         Audio Sector         Acoustic Fun         Chipamp         DIY HiFi Supply         Elekit         Elektor         Mains Cables R Us         Parts Connexion         Planet 10 hifi         Quanghao Audio Design         Siliconray Online Electronics Store         Tubelab     Manufacturers         AKSA         Audio Poutine         Musicaltech         Holton Precision Audio         CSS         exaDevices         Feastrex         GedLee         Head 'n' HiFi - Walter         Heatsink USA         miniDSP         SITO Audio         Twin Audio         Twisted Pear         Wild Burro Audio

 Similar Threads Thread Thread Starter Forum Replies Last Post TonyTecson Tubes / Valves 31 7th April 2018 02:56 AM LinuksGuru Tubes / Valves 2 4th October 2017 01:03 AM Mark.Clappers Multi-Way 18 17th July 2012 07:07 PM tresch Full Range 8 6th December 2011 12:34 AM smithy666 Subwoofers 6 14th April 2009 11:50 AM

 New To Site? Need Help?

All times are GMT. The time now is 06:37 PM.