Tubelab SE Trimmer

Nikon1975 · 7th April 2010, 08:39 AM

Dear All,

I am thinking of mounting the trimmers of the Tubelab SE on the lower side of the board, opposite to the sockets. Do you think this could cause any problem ?

Better ask :-)

Thanks,

Davide

rknize · 7th April 2010, 02:37 PM

It will work fine. Just remember their directions will be reversed. On top, CW is more bias and CCW is less. On the underside, the opposite will be true.

Nikon1975 · 8th April 2010, 09:50 AM

I always wanted to ask: how often do you check/adjust the bias of the tubelab ?

Thanks,

Davide

rknize · 8th April 2010, 01:44 PM

When new tubes are installed, I keep an eye on it for the first few hours of operation. Once it seems like they have settled, they should stay put for 100s of hours of use. Some tubes are more fickle than others. The Shuguang 300Bs seem to like to drift upward over time.

Evenharmonics · 03:38 PM

Quote:

Originally Posted by Nikon1975

I always wanted to ask: how often do you check/adjust the bias of the tubelab ?

It's checked every time my TSE is turned on. For me it's easy because I installed bias meters.

My Shuguang 300B hasn't changed after about 48 hours of use.

7th April 2010, 08:39 AM	#1
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Vienna	Tubelab SE Trimmer Dear All, I am thinking of mounting the trimmers of the Tubelab SE on the lower side of the board, opposite to the sockets. Do you think this could cause any problem ? Better ask :-) Thanks, Davide

7th April 2010, 02:37 PM	#2
rknize All the best stuff comes from Chian diyAudio Member Join Date: Feb 2009 Location: Chicagoland	It will work fine. Just remember their directions will be reversed. On top, CW is more bias and CCW is less. On the underside, the opposite will be true. __________________ Russ http://www.knizefamily.net/russ/cate...ics/tubeaudio/

8th April 2010, 01:44 PM	#4
rknize All the best stuff comes from Chian diyAudio Member Join Date: Feb 2009 Location: Chicagoland	When new tubes are installed, I keep an eye on it for the first few hours of operation. Once it seems like they have settled, they should stay put for 100s of hours of use. Some tubes are more fickle than others. The Shuguang 300Bs seem to like to drift upward over time. __________________ Russ http://www.knizefamily.net/russ/cate...ics/tubeaudio/

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8th April 2010, 09:50 AM	#3
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Vienna	I always wanted to ask: how often do you check/adjust the bias of the tubelab ? Thanks, Davide

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