accuphase E205 240v input section

[sakis]

this is the circuit that exists in the 240volt input of the accuphase E205

its made of a bridge rectifier and one resistor
never seen anything like that before
i cant really understand the perpus
does it work like a surge protector or a power conditioner ?

any comments are very welcome

[bogdan_borko]

It`s a mains DC "eliminator" ,kind of ...

[sakis]

just finish repairing it ..... breathless ....speachless .... one of the very best devices i ever worked with .... compaired with many id say

[pliedtka]

Bryston, (just some 100km away from where I'm now) uses the rectifire in most their amps - go to Bryston web site, they have shematics for all amps they produce - that's a consumer support not all companies provide

[fojica]

Hi, Sakis

Can you tell me that bridge model or maybe parameters for it (voltage & current) ? I would like to try this kind of circuit on a diy amp with toroid transformer, maybe it will help it to "buzz" less (the transformer, of course).
Thanks.

[sakis]

its a standard 400v 16A rectifier ...nothing odd about it

but it seems to me that if you have buzzzz issues with a toroid this cannot be the solution

there is a number of things you need to check before that ...some of them is mechano issues some others are electric

( when i was a kid i was constructing a quiet big amp and i thought tha it would be wise to support the toroid with a bigger screw long enough to fit nuts in both sides of the box up side and down side .... phisycal dimention of all that also matched perfectly .... finished the amp made all tests succsesfully but in the final touch thus fiting the cover of the amp the toroid started to get warm and loud ......i actually created one shorted wind with the lower and upper part of the box connected with the screw passing through the trafo ..... nice .... i was only 16 at the time ....particular amp serves a small cafe with four hifi speakers produces 120+120 watt and still works till today ....i presume that ""still working""" doesnt mean that also play properly .... but no complain yet from the costumer ..... now days i am 43 .... calculate .... )

[fojica]

Hi, Sakis

Thanks for information. Buzz issues are not constant (meaning not all the time)..there are only moments, and i suspect the mains having some dc misery in that moments.
Anyway, i will try to build and insert it in the following days...will see if helps.
Regards,
Tibi