hi,
i have a toroid in a device that runs of USA power. Sometimes there is a
way to cut the primary/secondary windings and reconfigure but this doesn’t
have it. So, i think i need to replace it for 240v. Anyone know about this?
Got a picture and specifications of the toroidal transformer?
It should be possible to run the toroidal TX on UK mains with 230V on the
primary, the problem is the secondary will be producing (double) too much
voltage for the rest of the circuit. What is the secondary voltage and
current?
It might be better to replace that toroid with one that meets your
requirements more closely. My advice, flog the US toroid on EBAY and use
the proceeds to buy what yóú need.
AlexOn 15 June 2015 at 13:34, Raj Patel rajahpatel@googlemail.com wrote:
hi,
i have a toroid in a device that runs of USA power. Sometimes there is a
way to cut the primary/secondary windings and reconfigure but this doesn’t
have it. So, i think i need to replace it for 240v. Anyone know about this?–
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ok,
i don’t know specs for sure. there is a service manual but its for a
slightly different unit, ironically that unit can have its power rating
changed.
toroid runs to three LDO regs 7805 for ttl and 2x 7812 for audio. as you
can see someone has over volted this at some point and there are some
raised traces.
Can i surmise the spec? its pretty low powered and imagine no more than 30wOn Monday, 15 June 2015 14:27:38 UTC+1, Alexander Lang wrote:
Got a picture and specifications of the toroidal transformer?
It should be possible to run the toroidal TX on UK mains with 230V on the
primary, the problem is the secondary will be producing (double) too much
voltage for the rest of the circuit. What is the secondary voltage and
current?It might be better to replace that toroid with one that meets your
requirements more closely. My advice, flog the US toroid on EBAY and use
the proceeds to buy what yóú need.Alex
On 15 June 2015 at 13:34, Raj Patel <rajah...@googlemail.com <javascript:> wrote:
hi,
i have a toroid in a device that runs of USA power. Sometimes there is a
way to cut the primary/secondary windings and reconfigure but this doesn’t
have it. So, i think i need to replace it for 240v. Anyone know about this?–
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Raised traces means the unit got hot when in use not necessarily
over-volted. Sounds more likely that the traces were not designed for the
amount of current required…
I believe you would be ok to replace that toroid with a 230Vac to 15Vac
toroidal transformer. Make sure you select one with the same rough
diameter as the one pictured and with a similar current rating.
Cheers
AlexOn 15 June 2015 at 14:49, Raj Patel rajahpatel@googlemail.com wrote:
ok,
i don’t know specs for sure. there is a service manual but its for a
slightly different unit, ironically that unit can have its power rating
changed.toroid runs to three LDO regs 7805 for ttl and 2x 7812 for audio. as you
can see someone has over volted this at some point and there are some
raised traces.Can i surmise the spec? its pretty low powered and imagine no more than 30w
On Monday, 15 June 2015 14:27:38 UTC+1, Alexander Lang wrote:
Got a picture and specifications of the toroidal transformer?
It should be possible to run the toroidal TX on UK mains with 230V on the
primary, the problem is the secondary will be producing (double) too much
voltage for the rest of the circuit. What is the secondary voltage and
current?It might be better to replace that toroid with one that meets your
requirements more closely. My advice, flog the US toroid on EBAY and use
the proceeds to buy what yóú need.Alex
On 15 June 2015 at 13:34, Raj Patel rajah...@googlemail.com wrote:
hi,
i have a toroid in a device that runs of USA power. Sometimes there is
a way to cut the primary/secondary windings and reconfigure but this
doesn’t have it. So, i think i need to replace it for 240v. Anyone know
about this?–
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hi, current rating not the back panel states 10w i think you are right
about 15Vac which will put least stress on LDOs. still i’m thinking of
just using a VAC power supply, external and taking the toroid out. there
are toroids on eBay but not via farnell and i can probably find a Vac
external PSu, if i look around.
Surely, i can diminish magnetic interference from having the power outside
of the unit.On Monday, 15 June 2015 17:29:06 UTC+1, Alexander Lang wrote:
Raised traces means the unit got hot when in use not necessarily
over-volted. Sounds more likely that the traces were not designed for the
amount of current required…I believe you would be ok to replace that toroid with a 230Vac to 15Vac
toroidal transformer. Make sure you select one with the same rough
diameter as the one pictured and with a similar current rating.Cheers
Alex
On 15 June 2015 at 14:49, Raj Patel <rajah...@googlemail.com <javascript:> wrote:
ok,
i don’t know specs for sure. there is a service manual but its for a
slightly different unit, ironically that unit can have its power rating
changed.toroid runs to three LDO regs 7805 for ttl and 2x 7812 for audio. as
you can see someone has over volted this at some point and there are some
raised traces.Can i surmise the spec? its pretty low powered and imagine no more than
30wOn Monday, 15 June 2015 14:27:38 UTC+1, Alexander Lang wrote:
Got a picture and specifications of the toroidal transformer?
It should be possible to run the toroidal TX on UK mains with 230V on
the primary, the problem is the secondary will be producing (double) too
much voltage for the rest of the circuit. What is the secondary voltage
and current?It might be better to replace that toroid with one that meets your
requirements more closely. My advice, flog the US toroid on EBAY and use
the proceeds to buy what yóú need.Alex
On 15 June 2015 at 13:34, Raj Patel rajah...@googlemail.com wrote:
hi,
i have a toroid in a device that runs of USA power. Sometimes there is
a way to cut the primary/secondary windings and reconfigure but this
doesn’t have it. So, i think i need to replace it for 240v. Anyone know
about this?–
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Raj,
Most definitely are toroids in Farnell…Search for toroidal power
transformers but I believe below is close to what you are looking for,
http://uk.farnell.com/multicomp/mcta015-15/transformer-toroidal-2-x-15v-15va/dp/9530266
There is very little magnetic interference generated by a toroidal
transformer. The energy is coupled quite well and it is at 50 Hz so well
below human hearing and out of the range of your audio amplifiers. I
cannot see any improvement by moving this TX external to yoúr unit. Unless
it is easier for you.
Regards
AlexOn 15 June 2015 at 21:13, Raj Patel rajahpatel@googlemail.com wrote:
hi, current rating not the back panel states 10w i think you are right
about 15Vac which will put least stress on LDOs. still i’m thinking of
just using a VAC power supply, external and taking the toroid out. there
are toroids on eBay but not via farnell and i can probably find a Vac
external PSu, if i look around.Surely, i can diminish magnetic interference from having the power outside
of the unit.On Monday, 15 June 2015 17:29:06 UTC+1, Alexander Lang wrote:
Raised traces means the unit got hot when in use not necessarily
over-volted. Sounds more likely that the traces were not designed for the
amount of current required…I believe you would be ok to replace that toroid with a 230Vac to 15Vac
toroidal transformer. Make sure you select one with the same rough
diameter as the one pictured and with a similar current rating.Cheers
Alex
On 15 June 2015 at 14:49, Raj Patel rajah...@googlemail.com wrote:
ok,
i don’t know specs for sure. there is a service manual but its for a
slightly different unit, ironically that unit can have its power rating
changed.toroid runs to three LDO regs 7805 for ttl and 2x 7812 for audio. as
you can see someone has over volted this at some point and there are some
raised traces.Can i surmise the spec? its pretty low powered and imagine no more than
30wOn Monday, 15 June 2015 14:27:38 UTC+1, Alexander Lang wrote:
Got a picture and specifications of the toroidal transformer?
It should be possible to run the toroidal TX on UK mains with 230V on
the primary, the problem is the secondary will be producing (double) too
much voltage for the rest of the circuit. What is the secondary voltage
and current?It might be better to replace that toroid with one that meets your
requirements more closely. My advice, flog the US toroid on EBAY and use
the proceeds to buy what yóú need.Alex
On 15 June 2015 at 13:34, Raj Patel rajah...@googlemail.com wrote:
hi,
i have a toroid in a device that runs of USA power. Sometimes there
is a way to cut the primary/secondary windings and reconfigure but this
doesn’t have it. So, i think i need to replace it for 240v. Anyone know
about this?–
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hi thanks alex,
ok i think i was becoming lazy with farnell search engine not turning up what i was looking for. ok maybe as well go for this next time i make a farnell order.> On 15 Jun 2015, at 23:28, Alexander Lang alexanderlang1980@gmail.com wrote:
Raj,
Most definitely are toroids in Farnell…Search for toroidal power transformers but I believe below is close to what you are looking for,
http://uk.farnell.com/multicomp/mcta015-15/transformer-toroidal-2-x-15v-15va/dp/9530266 http://uk.farnell.com/multicomp/mcta015-15/transformer-toroidal-2-x-15v-15va/dp/9530266
There is very little magnetic interference generated by a toroidal transformer. The energy is coupled quite well and it is at 50 Hz so well below human hearing and out of the range of your audio amplifiers. I cannot see any improvement by moving this TX external to yoúr unit. Unless it is easier for you.
Regards
Alex
On 15 June 2015 at 21:13, Raj Patel <rajahpatel@googlemail.com mailto:rajahpatel@googlemail.com> wrote:
hi, current rating not the back panel states 10w i think you are right about 15Vac which will put least stress on LDOs. still i’m thinking of just using a VAC power supply, external and taking the toroid out. there are toroids on eBay but not via farnell and i can probably find a Vac external PSu, if i look around.Surely, i can diminish magnetic interference from having the power outside of the unit.
On Monday, 15 June 2015 17:29:06 UTC+1, Alexander Lang wrote:
Raised traces means the unit got hot when in use not necessarily over-volted. Sounds more likely that the traces were not designed for the amount of current required…I believe you would be ok to replace that toroid with a 230Vac to 15Vac toroidal transformer. Make sure you select one with the same rough diameter as the one pictured and with a similar current rating.
Cheers
Alex
On 15 June 2015 at 14:49, Raj Patel <rajah...@googlemail.com <>> wrote:
ok,
i don’t know specs for sure. there is a service manual but its for a slightly different unit, ironically that unit can have its power rating changed.toroid runs to three LDO regs 7805 for ttl and 2x 7812 for audio. as you can see someone has over volted this at some point and there are some raised traces.
Can i surmise the spec? its pretty low powered and imagine no more than 30w
On Monday, 15 June 2015 14:27:38 UTC+1, Alexander Lang wrote:
Got a picture and specifications of the toroidal transformer?It should be possible to run the toroidal TX on UK mains with 230V on the primary, the problem is the secondary will be producing (double) too much voltage for the rest of the circuit. What is the secondary voltage and current?
It might be better to replace that toroid with one that meets your requirements more closely. My advice, flog the US toroid on EBAY and use the proceeds to buy what yóú need.
Alex
On 15 June 2015 at 13:34, Raj Patel <rajah...@googlemail.com <>> wrote:
hi,i have a toroid in a device that runs of USA power. Sometimes there is a way to cut the primary/secondary windings and reconfigure but this doesn’t have it. So, i think i need to replace it for 240v. Anyone know about this?
–
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