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In Reply to: Ear 834P phono stage posted by wfs on August 4, 2005 at 13:34:55:
The circuit design has not changed AFAIK. The only differences would be some parts quality and omission/addition of some parts.If you have downloaded Thorstens modification guide then this will get you most of the way there. It is easy to locate the components he identifies but you must completely disassemble the unit and be very skilled at soldering/desoldering.
I would suggest you put at least 100 hours on the unit before making any changes. In addition, tube rolling will certainly change the sonic character of the unit. I found Mullard CV4004's in all 3 positions to be the most rewarding but YMMV and others here will recommend other tubes/combinations but it is all a matter of taste and system synergy.
I have extensively modded my 834p using Thorstens guide and the best mod you can do IMO is remove the transformer to outside the chassis. Place it in it's own shielded enclosure.
Not sure how far you want to go with it still under warranty but the choice is yours. Carefully read Thorstens guide and identify the upgrades you would be comfortable doing.
One other thing, the 834p responds extremely well to mod's and can be taken to extreme levels where it will compete with the best but it takes alot of work.
Best Regards,
Kenster
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Follow Ups
- Re: Ear 834P phono stage - kenster 15:48:21 08/04/05 (4)
- Re: Ear 834P phono stage - chiggy 18:59:34 08/04/05 (3)
- Last stage with 6SN7 will be tried tomorrow ... - KIS 03:05:44 08/05/05 (2)
- thats interesting... - chiggy 07:45:26 08/05/05 (1)
- Other benefit from 6SN7 is that it is is much lower impedance tube (nt) - KIS 18:50:02 08/05/05 (0)