Modifying the unit ? That sounds too technical for me as I'm only a beginner in electronics. Are there any literatures that teach ume how to do that? 12AX7 is cheap, using different types of tubes may cost too much ....
Lazarus tube preamp noise ....
Hi all,
After listening for a while on my new tube system I decided to complete the whole tube line by using the Lazarus pre-amp's phono as input to my aux of the Legend preamp. Knowing in advance from the seller that this preamp had some sort of "hiss" I still bought it to experiment. Whoa ... the hiss is higher than I expected kind of ... you know ... like the hiss from a cassette tape but even higher . Here are what I've tried:
1) Leave the preamp on for 3 days in a row . The hiss noise is less dominant but is still there.
2) Change the 12AX7 tubes from Tesla to military 5751 ... Still noisy .. even more .
The next thing I plan to do is to replace the 12AU7's pair but doubt if this' gonna work. My friend recommends to replace all the caps but doing this is a major thing and the last resort if I have to. Any ideas to do next?
After listening for a while on my new tube system I decided to complete the whole tube line by using the Lazarus pre-amp's phono as input to my aux of the Legend preamp. Knowing in advance from the seller that this preamp had some sort of "hiss" I still bought it to experiment. Whoa ... the hiss is higher than I expected kind of ... you know ... like the hiss from a cassette tape but even higher . Here are what I've tried:
1) Leave the preamp on for 3 days in a row . The hiss noise is less dominant but is still there.
2) Change the 12AX7 tubes from Tesla to military 5751 ... Still noisy .. even more .
The next thing I plan to do is to replace the 12AU7's pair but doubt if this' gonna work. My friend recommends to replace all the caps but doing this is a major thing and the last resort if I have to. Any ideas to do next?
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- 7 posts total
- 7 posts total