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Phono pre-amp problems

Hello to all,
I have Sonic Frontiers SFP-1 signature phono stage and wondering if anyone has had this problem with this phono stage. The problem is that when playing an LP the sound will go out and no music will play for approx. 2-3 seconds, then back on, it will do this three or four times in a half hour and I hear a clicking noise inside the phono stage, It's the same clicking I hear when unit is first turned on and when it's warmed up. Every time this happens the led light blinks on the phono stage as if I were turning it on. Anyone care to tackle this one?
Thanks
jsawhitlock
weiserb's avatar
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weiserb
476 posts
 
Your unit may have a bad power supply, or possibly a bad tube/tubes but I think it might be more serious.
s23chang
619 posts
 
Yes. Bad tube can cause this type of problem. If one of tube has a short, it is possible that LED might go off and blow the fuse.
sbank's avatar
sbank
3,378 posts
 
If there's a left & right tube in question, flip-flop them and see if the clicking & noise moves to the other side. If so, it's the tube, if not, more serious problem.

If the tube complement doesn't allow this, you'll need to try an entire new tube set to test it out.

Spencer
jsawhitlock OP
302 posts
 
Sbank, The clicking noise i'm reffering to is from the phono stage and not speakers. when a component is first powered up it goes into stand-by mode for 10-20 seconds then turns on and a click noise happends, this is normal and the phono stage does this every time I power it up, but this does it in the middle of LP play sort of like someone killed the power for a second then turned it back on, the led light blinks on the phono stage for 10 seconds then I hear the click as normal then unit comes on. It's sounding more like a bad on/off switch.
sugarbrie
3,854 posts
 
Does the "stand by" circuit need repair? (This is what I thought before reading the various responces.)

Is this a dual mono preamp? If so, I would think possibly a bad tube would only affect one channel, not both..
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