|
|
Post by Hacksaw on Jul 23, 2006 20:50:37 GMT -5
Not sure where to post this.. Vomhalen, Please advise :-) Splawn Bias Info, If you are unsure about performing a bias procedure, Please consult, or take your amp to a good amp Technician. Since there has been many questions about the Bias'ing Potentiometer in a Splawn Amplifier. The correct variable resistor for tuning Bias is in position VR1 inside. This brass screw is very precise in its ability to set the Bias. it takes a few turns to adjust. Dont over do it!  Bias the Splawn close to 60% |
|
|
|
Post by craggin on Jul 24, 2006 8:37:35 GMT -5
+1...awesome post.
|
|
|
|
Post by VomHalen on Jul 31, 2006 8:16:47 GMT -5
great post,
tuskerkev and i were talking about this last week...
hack, would we be able to rebias our amps ourselves or would you recommend against that?
|
|
|
|
Post by Hacksaw on Aug 2, 2006 19:37:39 GMT -5
great post, tuskerkev and i were talking about this last week... hack, would we be able to rebias our amps ourselves or would you recommend against that? Halen dude! Honestly, I don't know your abilities? if you ever dabbled with electronics and understand the principles, I would say go for it! |
|
|
|
Post by VomHalen on Aug 3, 2006 7:39:04 GMT -5
great post, tuskerkev and i were talking about this last week... hack, would we be able to rebias our amps ourselves or would you recommend against that? Halen dude! Honestly, I don't know your abilities? if you ever dabbled with electronics and understand the principles, I would say go for it! hack, my abilities are less than zero...i guess i'll have a pro do it when i need it done |
|
|
|
Post by socalsteve on Aug 3, 2006 13:12:34 GMT -5
Check out the Weber Bias-Rite. From the description it looks like a great way to go for the DIY'er. I'll probably get one at some point myself.
BTW Hacksaw, thanks for the info on the potentiometer.
|
|
|
|
Post by windsen on Aug 3, 2006 14:00:24 GMT -5
my bias rite FINALLY came in the mail today...darn fedex driving halfway across the country in the wrong direction =p i might try installing/biasing the kt77s tonight =)
|
|
|
|
Post by windsen on Aug 3, 2006 18:13:42 GMT -5
ok im trying to bias my kt77s but having some questions. what do i do if the tubes aren't reading consistent to each other? like the current readinds between some of the tubes are like 10 mA off. any help would be appreciated. thanks.
|
|
|
|
Post by Hacksaw on Aug 3, 2006 18:54:38 GMT -5
Sounds like a unmatched set. or a poor matched set. usually 3 ma to 5 ma is the tolerance for a matched set. wont hurt anything. just bias the higher ma ones where you want them. see how it sounds. you might like it! the lowers will run cool which is OK.
You might pair up the hi ma rated in the center , and the lower on the outside for example.. and see how it changes.. if it changes.. then bias like mentioned above. (Sometimes people dont pair them)
|
|
|
|
Post by windsen on Aug 3, 2006 19:16:12 GMT -5
yea, it seems at though the tubes (from eurotubes) were not matched well. i checked the mullards el34's that scott originally sent me and those were matched nearly perfectly.
ill give bob at eurotubes a call tomorrow to see what he can do.
thanks for all your help!
|
|
|
|
Post by windsen on Aug 3, 2006 19:37:42 GMT -5
i also noticed that when i bias at full power mode and half power mode, the readings differ a bit. is this normal? since i normally play at half power should i just bias in the half power mode?
|
|
|
|
Post by Hacksaw on Aug 3, 2006 19:38:48 GMT -5
Interesting! bob matches better than anyone. I wil lbe curious to hear what he says. My E34L's balanced great. probably could call him tonight. as we are 2 hours behind and works all the time it seems!
|
|
|
|
Post by Hacksaw on Aug 3, 2006 19:49:08 GMT -5
i also noticed that when i bias at full power mode and half power mode, the readings differ a bit. is this normal? since i normally play at half power should i just bias in the half power mode? How much is it changing? Shouldnt change much... and it is normal. I usually bias at 100 watt. |
|
|
|
Post by windsen on Aug 3, 2006 19:54:31 GMT -5
it's changing only about 2 or 3 mA.
|
|
|
|
Post by Hacksaw on Aug 3, 2006 20:38:30 GMT -5
Cool.. not enought to worry about. :-)
|
|
