Tony's latest traffo DIY build

[TonyTecson]

hi tony thanks for the reply,
i cant find 1 3/4 center leg lamination, they have 3.8cm(1 1/2inch) center leg,so transformer height is 3.75inch. is this ok tony for my post no 198?

pls give the specs.

1.5 in centre leg x 3.75 inch stack....
VA = (1.5 x 3.75 x 5.58)^2 = 985.2 volt-amperes
primary current = 4.28A
primary turns = 1750/(1.5x3.75) = 311 turns #19 awg.
secondary turns = 42 turns #16 awg
you need 4 coils of 42 turns, in series to get 60-30-0-30-60.

 

[wattaniya]

thanks tony for reply,
so in this calculation, i can get 5 ampere. am i correct tony?

 

[wattaniya]

hi tony is this correct or not?

total secondary voltage is 120v ac(60-30-ct-30-60), 10ampere. so 1200watts.(VA).

if i select 1444w, size lamination (3.8cm-10cm) in the below table.

turns per volt 1.1.
for 10ampere table shows 13awg so 120*1.1=132 turns for secondary.

for primary 1200w / 235=5.106ampere. so 235*1.1=258.5turns.
16awg 5.106ampere

 

[TonyTecson]

all depends on the quality of the core material you actually uses...M6 will give you more power than most non goss irons...

 

[wattaniya]

thanks tony for the reply.
can u tell me how to identify the wire is single coated or double coated?

 

[TonyTecson]

thanks tony for the reply.
can u tell me how to identify the wire is single coated or double coated?

you have to trust your supplier, but in general, double coated wire will be thicker...depends on the manufacturer...

 

[wattaniya]

thanks tony for the reply.

 

[andrewlebon]

HELLO

Hi Tony
greetings thank you for guiding me to make my torriod
OD 21cm ID 10.5 cm height 10cm
primary 13 swg
secondary 11 swg
ac 50 0 50 and 60 0 60
apex audio your softstart is good have to change 47 ohms to 50 watts
nice softstart
warm regards
andrew lebon

 

[TonyTecson]

@andrewlebon , you are welcome, how many kilos did the final traffo weigh? good job.....

 

[TonyTecson]

this is a double screened traffo i built for an upcoming 6SN7/6CG7 aikido line amp build....

 

[Kay Pirinha]

Hi Tony
greetings thank you for guiding me to make my torriod
OD 21cm ID 10.5 cm height 10cm
primary 13 swg
secondary 11 swg
ac 50 0 50 and 60 0 60
apex audio your softstart is good have to change 47 ohms to 50 watts
nice softstart
warm regards
andrew lebon

Hi,

do you own a toroid winding device?

Best regards!

 

[TonyTecson]

must be a hand job.....i did a torroid many years ago by hand....

 

[norstar815]

hi tony,

nice work on those trafo... and you really help alot of diy'ers out there.
btw, im also a newbie and need some advice from you...

1. i have 2 trafo from a friend with the same size in Height of 72mm and
Width of 86mm.

2. but different thickness. the 1st has a thickness of 44mm and the other
is 41mm.

now, one of my friend says i can merge this trafo to be more effective.

is it possible?

thanks.

 

[TonyTecson]

how would like to merge them?

 

[wattaniya]

Hi Tony
greetings thank you for guiding me to make my torriod
OD 21cm ID 10.5 cm height 10cm
primary 13 swg
secondary 11 swg
ac 50 0 50 and 60 0 60
apex audio your softstart is good have to change 47 ohms to 50 watts
nice softstart
warm regards
andrew lebon

nice job andrewlebon,
which softstart are u using? can u share it?
how many ampere of the torroid.

 

[andrewlebon]

HELLO

Hi Nazirdighi
greetings this is apex softstart good one use BTA41 triac if you
cant get MAC224 triac
warm regards
andrew lebon

 

[wattaniya]

thanks andrewlebon.

 

[norstar815]

tony,

can't upload some pics... do you have email so i can send you pic of what
i really meant to do with those trafo?

thanks.

 

[TonyTecson]

^click on my handle and you can send me email...

 

[wattaniya]

hi tony,
for high power amp transformers, what is the main thing to look,[COPPER WIRE OR LAMINATION]
some time in full load the copper wire will break.