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In Reply to: RE: Samuels Nighthawk posted by welly on February 14, 2017 at 13:53:58
" but occasionally, there is a louder irregular noise like a motor boat noise"
The only time that I have experienced this type of fault was caused by the cantilever being able to move minutely forward and back rather than remaining fixed in relation to the magnets ( or, in this case, coils).
I am not saying that this is your problem but it does sound like a cartridge fault and not a phono pre-amp one especially as the problem did not exist with the Denon cart.
Ray Samuels advises the the Nighthawk offers " 40db-75db in six increments". I do not believe that knowing the precise incremental values will help you at all as they will be marginal e.g. probably around 4dB per increment particularly as the fault is still apparently audible at the lowest set sensitivity .
Follow Ups:
Just for clarification, the noise occurs ONLY at the lowest gain (40dB). it doesn't occur at the next higher setting (4xdB). That's what's confusing me... I would have expected it to occur at either setting, particularly if it occurs at the lowest... It's odd...
Cheers
Welly
He hoped and prayed that there wasn't an afterlife. Then he realized there was a contradiction involved here and merely hoped that there wasn't an afterlife.
- Douglas Adams
Then the answer is simple. Use the next highest setting. Why torture yourself?
Why torture yourself?
Curiosity is one driver. I was trying to get my head around the fact that the issue does not manifest at the higher setting.
Cheers
Welly
He hoped and prayed that there wasn't an afterlife. Then he realized there was a contradiction involved here and merely hoped that there wasn't an afterlife.
- Douglas Adams
Try moving the Nighthawk to a position further away from the turntable. I had a Nighthawk and I occasionally experienced hum but I was using it with a MC cartridge. After moving the Nighthawk, I didn't have any hum issues. However, I don't know why you would not experience the noise at a higher gain setting. Maybe Ray Samuels could answer that question.
The reason that I suggest moving the Nighthawk away from the turntable is that it might be picking up noise from the turntable motor. I had that issue when I owned the Nighthawk and after I moved it to another shelf, the noise went away.
Try cleaning the gain selector switch contacts in the nighthawk.
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