Help: Swap 220v for 110v transistor on Def Tech amp 2002 tower

[2002TL]

anyone have any idea what transistor to swap out on the amp board on a Definitive Technology tower 250wt amp to convert to 110v USA ?

 

[Lordoftherings]

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anyone have any idea what transistor to swap out on the amp board on a Definitive Technology tower 250wt amp to convert to 110v USA ?

Ouch! Dunno. Wonder if it's even possible?

* By the way, Welcome to Audioholics HT Forums.

Bob

 

[TLS Guy]

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anyone have any idea what transistor to swap out on the amp board on a Definitive Technology tower 250wt amp to convert to 110v USA ?

It won't be a transistor you have to swap. You need to find out if the power transformer is tapped and if so change to the 110 volt tapping. If the power transformer is not tapped, you will need to replace the power transformer, which will be very expensive and difficult.

These days to keep costs down transformers are not usually tapped.

Your cheapest solution will likely be to have your electrician run a 240 volt line on the two phases of your home. In most homes line voltage ends up being 110 to 115 rather than the specified 220 volts. In any event an over voltage of even 20 volts would not be significant.

 

[Rickster71]

I think you mean Transformer.
I'd look at the schematics from both versions (110v & 220V) and check to see what components are different.
It depends on more than just the power supply transformer; I have a feeling it won't be quite that simple.

It may be more cost effective to run a 220v circuit to those speaker locations.
just a thought.

Edit: as you see I type too slow.
Thanks TLS!

 

[2002TL]

Voltage Converter Regulator 110 220V Up/Down ??

Why would I need electrician to run a 220v circuit into house , I thought converters can upconvert.

 

[TLS Guy]

Why would I need electrician to run a 220v circuit into house , I thought converters can upconvert.

It will be cheaper and better to have a 220 volt line run. You will need a good expensive transformer to run that power amp safely.

If you do use a step up transformer, it need to meet BOTH the VA rating AND the power of your Def tech in continuous watts. The reason is that your load will be an inductive discontinuous load, with a phase angle between current and voltage. Therefore both apparent and continuous power requirements have to be met.

Failure to understand this and comply is a common reason why people burn out transformers when they don't expect to.

 

[2002TL]

It will be cheaper and better to have a 220 volt line run. You will need a good expensive transformer to run that power amp safely.

If you do use a step up transformer, it need to meet BOTH the VA rating AND the power of your Def tech in continuous watts. The reason is that your load will be an inductive discontinuous load, with a phase angle between current and voltage. Therefore both apparent and continuous power requirements have to be met.

Failure to understand this and comply is a common reason why people burn out transformers when they don't expect to.

-------------
-1500 Watt Voltage Converter Regulator 110 220V Up/Down $50 Ebay
FEATURES:

<!--[if !supportLists]-->· Maximum capacity 1500 Watts, Heavy Duty Voltage Converter / Regulator / Transformer<!--[endif]-->

<!--[if !supportLists]-->· Input Single Phase 110V/220V or 220V/240V<!--[endif]-->

<!--[if !supportLists]-->· Single Phase Step Up or Step Down Functionality<!--[endif]-->

<!--[if !supportLists]-->· 3 outlets in the front ( 1 for 110V & 2 for 220V )<!--[endif]-->

<!--[if !supportLists]-->· Circuit Breaker Switch / Power Switch<!--[endif]-->

<!--[if !supportLists]-->· LED Indicator for Power<!--[endif]-->

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<!--[if !supportLists]-->· Voltage Regulator Range :<!--[endif]-->

<!--[if !supportLists]--> 110V Input Range : 75 – 130V<!--[endif]-->

<!--[if !supportLists]--> 220V Input Range : 180 – 260V<!--[endif]-->

<!--[if !supportLists]-->· Heavy Duty For Continuous Use<!--[endif]-->

<!--[if !supportLists]-->· Ventilated Design for Long Life & Continuous Working<!--[endif]-->

<!--[if !supportLists]-->· Connectors :<!--[endif]-->

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<!--[if !supportLists]--> US Plug adaptor supplied<!--[endif]-->

<!--[if !supportLists]-->· Supplied Free Universal Plug Adapter – allows you to connect European 3-prong, Asian , Australian or UK Plugs to the converter<!--[endif]-->

<!--[if !supportLists]-->· Fuse / Circuit breaker Protected<!--[endif]-->

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<!--[if !supportLists]-->· Instruction How to Operate the Voltage Converter Regulator<

 

[TLS Guy]

-------------
-1500 Watt Voltage Converter Regulator 110 220V Up/Down $50 Ebay
FEATURES:

<!--[if !supportLists]-->· Maximum capacity 1500 Watts, Heavy Duty Voltage Converter / Regulator / Transformer<!--[endif]-->

<!--[if !supportLists]-->· Input Single Phase 110V/220V or 220V/240V<!--[endif]-->

<!--[if !supportLists]-->· Single Phase Step Up or Step Down Functionality<!--[endif]-->

<!--[if !supportLists]-->· 3 outlets in the front ( 1 for 110V & 2 for 220V )<!--[endif]-->

<!--[if !supportLists]-->· Circuit Breaker Switch / Power Switch<!--[endif]-->

<!--[if !supportLists]-->· LED Indicator for Power<!--[endif]-->

<!--[if !supportLists]-->· Analog Voltage Meter<!--[endif]-->

<!--[if !supportLists]-->· Durable Heavy Duty Industrial Type Cord<!--[endif]-->

<!--[if !supportLists]-->· Voltage Regulator Range :<!--[endif]-->

<!--[if !supportLists]--> 110V Input Range : 75 – 130V<!--[endif]-->

<!--[if !supportLists]--> 220V Input Range : 180 – 260V<!--[endif]-->

<!--[if !supportLists]-->· Heavy Duty For Continuous Use<!--[endif]-->

<!--[if !supportLists]-->· Ventilated Design for Long Life & Continuous Working<!--[endif]-->

<!--[if !supportLists]-->· Connectors :<!--[endif]-->

<!--[if !supportLists]--> Shucko European Plug on the cord<!--[endif]-->

<!--[if !supportLists]--> US Plug adaptor supplied<!--[endif]-->

<!--[if !supportLists]-->· Supplied Free Universal Plug Adapter – allows you to connect European 3-prong, Asian , Australian or UK Plugs to the converter<!--[endif]-->

<!--[if !supportLists]-->· Fuse / Circuit breaker Protected<!--[endif]-->

<!--[if !supportLists]-->· Dimensions : 12”x 11” x 8”<!--[endif]-->

<!--[if !supportLists]-->· Weight : 20 Lbs<!--[endif]-->

<!--[if !supportLists]-->· Shipping Weight : 25 Lbs. <!--[endif]-->



Includes:

<!--[if !supportLists]-->· Free Universal Plug<!--[endif]-->

<!--[if !supportLists]-->· 1500 Watts Voltage Converter Regulator<!--[endif]-->

<!--[if !supportLists]-->· Instruction How to Operate the Voltage Converter Regulator<

I assume you have two speakers. Each speaker has an 8 amp slow blow fuse for 110 volts and a four amp slow blow for 250 volt. So the continuous power rating for two speakers needs to be 2000 watts. Assuming typical phase angles the VA rating needs to be 2600 VA.

I would not trust a $50 1500 watt power converter under any circumstances, and would regard it as hazardous Far Eastern Junk until proved otherwise.

You will be far better served putting in a 220 volt outlet, which is not a big deal usually.

PM Rickster he is an electrician.

 

[PENG]

A 1.8 kVA or slightly larger step up transformer will do the job safely as long as it has the necessary approval such as UL for home use. You do not need 2600 VA for two such speakers. If it is cheaper (as TLS suggested but I seriouisly doubt it) to get an electrician to run a 220V line and have the installation inspected, then it is the way to go but unless your speakers are conveniently located I think it will be costly to run a 220V feed.

 

[mtrycrafts]

anyone have any idea what transistor to swap out on the amp board on a Definitive Technology tower 250wt amp to convert to 110v USA ?

An outside thought: does your place have a electrical outlet for an electric dryer but not used? If that is close enough, may tap from there.
Also, that outlets and anything dropped would be 240V.

 

[Lordoftherings]

An outside thought: does your place have a electrical outlet for an electric dryer but not used? If that is close enough, may tap from there.
Also, that outlets and anything dropped would be 240V.

Would that work?

* I guess it would. Hmmm... maybe I can... or even...

 

[TLS Guy]

A 1.8 kVA or slightly larger step up transformer will do the job safely as long as it has the necessary approval such as UL for home use. You do not need 2600 VA for two such speakers. If it is cheaper (as TLS suggested but I seriouisly doubt it) to get an electrician to run a 220V line and have the installation inspected, then it is the way to go but unless your speakers are conveniently located I think it will be costly to run a 220V feed.

The electrician should be able to use the wire to an existing outlet. The current will half what it would be at 110 and the insulation will be adequate. He can then place a 220 receptacle.

I had that done when I moved to Canada. In fact I had it done in a couple of houses to supply a Mullard 10/10 tube amp that did not have a 120 tap.

 

[2002TL]

Cost of labor to run that 220v circut ?

I think you mean Transformer.
I'd look at the schematics from both versions (110v & 220V) and check to see what components are different.
It depends on more than just the power supply transformer; I have a feeling it won't be quite that simple.

It may be more cost effective to run a 220v circuit to those speaker locations.
just a thought.

Edit: as you see I type too slow.
Thanks TLS!

==============
A 1500wt continuous heavy duty transformer is about $50-60 with fuse protection.

 

[PENG]

The electrician should be able to use the wire to an existing outlet. The current will half what it would be at 110 and the insulation will be adequate. He can then place a 220 receptacle.

I had that done when I moved to Canada. In fact I had it done in a couple of houses to supply a Mullard 10/10 tube amp that did not have a 120 tap.

That sounds good, but typically a circuit has more than one outlets. The electrician will have to replace every outlet on that circuit otherwise the inspector won't pass the installation.