LSS power tubes: which tubes apply to which wattage setting?

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hippdogs
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LSS power tubes: which tubes apply to which wattage setting?

Post by hippdogs » Thu Nov 18, 2010 8:26 pm

Which power tubes are used for each wattage setting? I know that at 30, it's all of the power tubes. At 15 watts is it the outside pair???????????? and for 5 watts is it the power tube on the far left or the far right ?????????? (facing the back of the amp)
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ja22y
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Re: LSS power tubes: which tubes apply to which wattage setting?

Post by ja22y » Fri Nov 19, 2010 12:04 pm

For 15w and 5w it's the inside pair. In 5w both inside tubes are active but one is shorted at the input. I don't know which one is shorted but both tubes are required to complete the connection and maintain the same impedance to the OT.

hippdogs
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Re: LSS power tubes: which tubes apply to which wattage setting?

Post by hippdogs » Sat Nov 20, 2010 12:35 am

BLESS YOU MY SON!
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thom
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Re: LSS power tubes: which tubes apply to which wattage setting?

Post by thom » Sat Nov 20, 2010 3:57 am

ja22y wrote:For 15w and 5w it's the inside pair. In 5w both inside tubes are active but one is shorted at the input. I don't know which one is shorted but both tubes are required to complete the connection and maintain the same impedance to the OT.
Sorry to contradict you, but according to the manual:

"15 watt setting runs only the outside........pair of tubes............The 5 watt setting uses 1 x EL84 (far left facing rear)".

ja22y
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Re: LSS power tubes: which tubes apply to which wattage setting?

Post by ja22y » Sat Nov 20, 2010 11:10 am

I stand corrected. thom is right.

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