Tony's latest traffo DIY build

[Tony]

Originally Posted by nazirdigi

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.

[nazirdigi]

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

[nazirdigi]

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

[Tony]

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

[nazirdigi]

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

[Tony]

Originally Posted by nazirdigi

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...

[nazirdigi]

thanks tony for the reply.

[andrewlebon]

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

[Tony]

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

[Tony]

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