Voltage conversion of Accuphase A-65 or A-70


Does anyone know how to convert voltage of Accuphase A-65 or A-70 100v to 110/120v? Or does anyone provide information on voltage conversion table of Accuphase A-65 or A-70?

does it require solder?

cj64

does it require solder?

Based on a web photo, the Accuphase A70 utilize Faston connection for voltage conversion, no soldering required.  Swapping two wires will change the incoming mains voltage from 100V to 120V. If you can post a image of the transformer 100V connection, I think we can figure it out.

@foolishman

Thanks for posting photos of Accuphase A-80. To convert the mains supply voltage from 100V to 120V, my suggestion is power up the A-80 with 100V mains,

  • Use an AC voltmeter to measure the voltage between the yellow/brown and red/blue wire connector tap on the Faston connector block, you should get a reading of 100VAC,
  • measure the voltage between yellow/brown and orange wire tap on the Faston connector block with a AC voltage meter, you should get a reading of 120VAC,
  • measure the voltage between yellow/brown and white wire tap on the Faston connector block with a AC voltage meter, you should get a reading of 120VAC.

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173751&parId=6E164E2EDFDD40F6%21120&o=OneUp

If the above measurements are correct, swap the blue wire for the white wire and the red wire for the orange wire to convert the A-80 mains transformer to 120V mains.

https://onedrive.live.com/?cid=6E164E2EDFDD40F6&id=6E164E2EDFDD40F6%2173754&parId=6E164E2EDFDD40F6%21120&o=OneUp

In addition, install a resistor in series to the primary winding of the auxiliary transformer to reduce the output voltage of its secondary winding by 20%.

 

 

@imhififan 

Thank you very much for the information you provided. I will try to do accordingly. I will keep you updated.

Thank you very much again.

@foolishman 

Just wanted to let you know that I don't have any experience with A-80 voltage conversion, I'm just making recommendations based on photos and previous experience converting Accuphase amplifiers. I highly recommend using DBT to power up the A-80 after conversion.

Please keep me updated, thanks.