I have the pioneer PL-a500s which requires 100V AC. Would making the conversion be as simple as swapping out the 500s transformer with a 110v transformer from a US market PL530? The turntables are identical inallother regards...curious if I would need to swap out the power board as well...thanks. Jim.
Maybe something like a variac could be used to lower the voltage. Another approach would be to buy a small 24V transformer, and power up its primary. Connect the secondary (24V) in series opposing with the primary of the 100V transformer. That will lower the voltage to about 100Vac or so on the 100V transformer. That would be a better choice than using a variac, since variacs are expensive compared to a small fixed voltage transformer.
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With Japanese power supply transformers people overlooking one important issue.
Japan has 100 VAC electric power system, but two separate electric grids: one is 50 Hz,
another is 60 Hz.
Now, every transformer is designed for the lowest frequency of operation.
This means, that every power transformer for the Japanese market equipment is/was
designed for 100 VAC / 50 Hz. At 60 Hz it will work even better: less burden for the transf
and less electromagnetic interference on the surrounding circuitry.
Now, input voltage and it's frequency are used in the transformer design formulas as a ratio.
That is, transf designed for 100V /50Hz =2 will work equally well in the 120V /60Hz =2
grid. And if wall socket output is just 110VAC transformer's work will be even easier.
Of course, with 120V input (instead of 100V) it will produce 20% higher voltage on all
secondaries. Now you have to check how the connected components - rectifiers, electrol. caps,
Volt. regulators, motors, and so on will handle the 20% higher voltage. Some components may
require replacement, and / or inclusion of the voltage drop resistors/ chokes.
That task is for the competent person, with the schematic for the device...
And, if in the end you will decide to replace transformer for the same required secondaries
voltages, that Japanese transf will be good to be used again in the 'new' designs, as having
20% higher secondaries voltage and 20% higher power.
Japan has 100 VAC electric power system, but two separate electric grids: one is 50 Hz,
another is 60 Hz.
Now, every transformer is designed for the lowest frequency of operation.
This means, that every power transformer for the Japanese market equipment is/was
designed for 100 VAC / 50 Hz. At 60 Hz it will work even better: less burden for the transf
and less electromagnetic interference on the surrounding circuitry.
Now, input voltage and it's frequency are used in the transformer design formulas as a ratio.
That is, transf designed for 100V /50Hz =2 will work equally well in the 120V /60Hz =2
grid. And if wall socket output is just 110VAC transformer's work will be even easier.
Of course, with 120V input (instead of 100V) it will produce 20% higher voltage on all
secondaries. Now you have to check how the connected components - rectifiers, electrol. caps,
Volt. regulators, motors, and so on will handle the 20% higher voltage. Some components may
require replacement, and / or inclusion of the voltage drop resistors/ chokes.
That task is for the competent person, with the schematic for the device...
And, if in the end you will decide to replace transformer for the same required secondaries
voltages, that Japanese transf will be good to be used again in the 'new' designs, as having
20% higher secondaries voltage and 20% higher power.
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https://www.antekinc.com/as-3450-300va-50v-transformer/. You can run the secondaries in series and get your 100v. Was the unit 50 or 60hz?