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834P phono stage mains change
834P phono stage mains change
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Old 12th January 2018, 08:33 PM   #1
Milkduds is offline Milkduds  United States
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Default 834P phono stage mains change

Does anyone know what it takes to convert one of the original Tim P. 834P phono stages from 240 to 120 volts? I have access to one from the UK that has the info below on the back of the phono stage but I don't see a switch. Also, the manual says the unit has been "....set internally for 120/240 volts." This has me confused.

Power: 100-120V
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Old 12th January 2018, 08:37 PM   #2
Zen Mod is offline Zen Mod  Serbia
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834P phono stage mains change

take it , in meantime contact EAR for tips

in case they ignore you , when it arrives open it and post pictures
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Old 12th January 2018, 08:56 PM   #3
DiyGazza is offline DiyGazza  United Kingdom
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As for "set to internally" It could be something as simple as moving a wire link for 120v to 240v operation.

You could also consider using a mains step up transformer.

Or as already suggested, contact the seller to see if they can set it for 120v operation before shipping.
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Old 13th January 2018, 06:48 AM   #4
coolmaster is offline coolmaster
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Hello all..
Luckily I have this picture from my archive of various work done in the past. The mains transformer is indeed a double primary winding that can wired for 240V or 120VAC. I reckon anyone can flip open the cover and see if its indeed 4 wires at the primary. Here is the picture of the guts. The bunch of 4 wires (Dark blue, Purple, Grey and Brown) Purple and Grey is tied for 240V operation for use in my region. You can DIY it or have someone competent to sort it out for 120V input. Good Luck!
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File Type: jpg IMG-20160131-WA0020.jpg (241.1 KB, 122 views)
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Old 22nd January 2018, 11:57 PM   #5
Milkduds is offline Milkduds  United States
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Thanks to all and especially coolmaster for the picture. My 834P came in today and it has the exact same PT. The primary has 2 windings. I think what I need to do is clip the gray and purple wires that connect the windings in series for 220vac and then resplice as needed to connect the 2 primary windings in parallel for 120 volts. This should be easy enough!

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