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-   -   Any Mods for a Noisy Leak Point one Stereo? (http://www.diyaudio.com/forums/tubes-valves/123192-any-mods-noisy-leak-point-one-stereo.html)

fsjonsey 16th May 2008 09:42 PM

Any Mods for a Noisy Leak Point one Stereo?
 
I just bought a Leak stereo 50 and point one stereo preamp together as a package deal. Both have had all paper caps, electrolytics, and out of tolerance resistors replaced. The amp sounds great, but the preamp is extremely noisy, with an audible buzz I can hear in the next room. Are there any mods to lower the preamp's noise floor? It uses four EF86's, so in theory, it could be pretty quiet. Any help would be greatly appreciated. Thanks in advance.

-Bryan

nkg 23rd May 2008 03:09 PM

Hi Bryan
Have a look at the H J Leak Email Group , kiewa valley stereo , and Klaus Schifers Web Page.
These are all Leak enthusiasts .
Nigel

nkg 24th May 2008 09:04 AM

Hi Bryan
One more thing most Leak amps have an input sensativity of around 125mV so you would have to play around with the gain of the input stage may be one of the big boys can help .
Nigel

Ardee 24th May 2008 09:52 AM

Are you sure it's worth the trouble? The Leak pre-amp has far too much gain for modern sources and a reputation for poor sound. If you want to keep the vintage look, just convert it to a passive unit. It is easy enough to bypass everything except the input switching and volume control without making any irreversible changes.

nkg 24th May 2008 03:34 PM

Hi Bryan
The leak site has moved to http://www.44bx.com//leak he has a circuit diagram to modify the stereo 50 to 550mV for full power and lowered the feedback to 14db for correct square wave response have a look .
Nigel


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