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Post by witters on Aug 23, 2008 15:17:28 GMT
I've recently added a Musical Fidelity X-10D v3 tube buffer to my system. All is fine except that I get hissing/interference from my speakers when I turn the volume up to a reasonably loud level.
Any ideas what is causing this please? It can't be an earthing problem as it's fine at a lower volume?
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Post by witters on Aug 23, 2008 19:40:55 GMT
Yep - it's all connected properly. It was in transit to me this week.
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Post by witters on Aug 23, 2008 20:44:22 GMT
Will do. As a novice will it be easy to tell?
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Post by witters on Aug 24, 2008 8:19:15 GMT
I've had a look at the valves and the connections seem solid . Any other ideas please?
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Post by canjunkie on Aug 24, 2008 11:49:41 GMT
IF you've got a spare set of tubes give them a swap out - I had trouble with my X-cans which was down to a tube going belly up and trying to cook the rest of the amp  When you opened the X10 up were there any signs of scorching on the PCB? Another thing to check, is the noise present on both channels? |
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Post by witters on Aug 24, 2008 21:03:11 GMT
I don't have any spare valves. The noise is present on both channels but worse on the left. No scorcjing at all on the pcb.
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Post by sometrolls2 on Aug 26, 2008 1:34:06 GMT
Have you tried positioning it away from the speakers?
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Deleted
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Post by Deleted on Aug 26, 2008 23:41:21 GMT
I don't have any spare valves. The noise is present on both channels but worse on the left. No scorcjing at all on the pcb. Still try switching the valves around, if the "worse" channel travels with the valve then you have valves as the/part of the problem, if the "worse" does not travel" then look elsewhere first. As already said, keep it away from any noisy/magnetic equipment, also, does it share a mains circuit with any other noisy equipment, e.g. a fridge. |
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Post by Deleted on Aug 27, 2008 0:22:25 GMT
I agree with that. Also, you have not said what equipment you are using the buffer in conjunction with. If you are feeding the buffer from a well designed CD player without valves, then into a decent solid state amplifier, with relatively short interconnects (1.5M or less), then you shouldn't be using a buffer !!! Buffers are normally used to overcome limitations in the cable driving abiities of the preceding stage, particularly if it uses valves , or has been modified by an "expert "  to remove those nasty opamps  in the output stages. Use of a valve type buffer amplifier, IMHO, is dubious at the best of times, and if the other equipment is high quality, may lead to a marked decrease in signal to noise ratio . i.e. HISS at higher volume settings. However, the resulting sound modification may sound appealing to some people. This is a very different scenario to incorporating a decent solid state buffer,such as the Burson , into the output stage of a mediocre player. SandyK |
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Post by Deleted on Aug 27, 2008 3:31:11 GMT
Is that why the $400 Novo H.A. is giving the obscenely priced (US$3,500+) Singlepower MPX3 SE Slam such a run for the money? Running costs are much lower, also. Hey, you don't even need an expensive stash of replacement transistors for when the performance deteriorates. It won't if it doesn't get abused !  |
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XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
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Post by XTRProf on Aug 27, 2008 6:30:27 GMT
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Post by Deleted on Aug 28, 2008 1:32:32 GMT
Hogwash ! The only thing a CONSUMER type tube has after all these years is a vaccuum. (If it's lucky!) |
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to remove those nasty opamps 
in the output stages. Use of a valve type buffer amplifier, IMHO, is dubious at the best of times, and if the other equipment is high quality, may lead to a marked decrease in signal to noise ratio . i.e. HISS at higher volume settings. However, the resulting sound modification may sound appealing to some people.
