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Old 7th May 2012, 02:37 AM   #1
GanzerD is offline GanzerD  United States
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Default A Newbie question....

I've been enjoying my SSE for the last 2 weeks.....
One thing I've noticed is that the input level seems to be going down gradually for my usual listening level.
Should I be worried about this? Is there a component that is degrading and changing the gain? Or is this normal?
TIA
Dave Ganzer
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Old 7th May 2012, 05:57 PM   #2
rknize is offline rknize  United States
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It wouldn't hurt to check the tube bias. You can also measure the voltage across the cathode resistors on the input tube to make sure it is operating at the correct current.
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Old 7th May 2012, 06:08 PM   #3
GanzerD is offline GanzerD  United States
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At this point I wish I had written these voltages down when I checked them right after first power up....I'll look at those voltages again.

Being new to these tube things, I just wondered if this was normal to see during the initial few hours of operation.....
Thanks,
DaveG
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Old 11th May 2012, 02:06 PM   #4
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A little bias drift and whatnot is fairly normal,for the first 'few' hours of an amplifiers operation,IME. After that,the various voltages,and bias,etc. should 'settle' a bit,and level out.

Sometimes tubes might have a bit of gas left in them,maybe the cathodes need to be heated up for a while,so the getters can warm up? Who knows,could be lots of things.

If things don't settle down,and you have wildly varying voltages/currents somewhere,I'd suspect bad tube(s),bad solder joint/connection,a faulty component,or oscillation.
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Old 11th May 2012, 02:33 PM   #5
GanzerD is offline GanzerD  United States
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Thanks guys! I'll be checking it out Saturday morning...
L8R
DaveG
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