Recto help

Thatbastarddon said:
Much “this”!!! ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Mesa just wants you to buy “their” tubes.
Proper biasing of power tubes is really important…
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All I know after playing Mesas for ≈30 years, they always sound best with Mesa-branded tubes. I've tried everything, and the best results have been with their own glass 100% of the time, regardless of who the manufacturer of said tube was.
 
gball said:
I'm certain that is the main reason

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Ok but school me on why all the Mesa amps if outfitted with Mesa tubes don't vary in spec from one model amp to the next enough to have the
gball said:
I'm certain that is the main reason

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Nevermind, here is Mesa's explanation from the link Gball posted.

Why should you only use MESA/Boogie® tubes in MESA amps?

MESA/Boogie’s business is designing and building high performance amplifiers. For this, tubes with a variance within a narrow range are required. We have a very sophisticated computer based tube testing system (nicknamed "Robotube") that matches and measures tubes over seven important parameters and technicians who add a few tests that only the human ear can measure. This insures we end up with only the tubes that meet our stringent demands.

Tubes don’t "draw" more or less bias. The way a bias supply is connected to a tube is akin to a dead end road, it just trails off to nowhere without really completing a circuit. It's a static voltage and regardless of what tube is in the socket or even if the tubes aren't plugged in at all, it doesn't change the bias voltage a bit. Since a bias supply needs to put out the right voltage and never vary, MESA amps are hard wired to the correct values and never need adjustment. And for more than 40 years, that's how MESA/Boogies have been built.

Time to change tubes? Just plug our tubes into any one of our amps and you're done. No tech needed. No bills and no worry about biasing. We only sell the tubes that meet the specifications required for our amplifiers.
 
A little more tech speak from the next section of Gball's article.

For purposes of biasing, it's the amount of "plate current" flowing with no signal applied that's important. Unfortunately, current is hard to measure because the circuit must be interrupted (as in "cut the wire") and the meter spliced "in series" with the broken circuit. But measuring voltage is easy. It is not necessary to interrupt the circuit because a voltage reading can be taken in parallel with the circuit intact. Thus, as a matter of convenience, most bias settings are given in volts at the grid, even though current through the plate is the important factor. As long as the tubes are "in spec", the right bias voltage will always give the correct plate current, so there's no need for the bias voltage to be adjustable!
 
chilipeppermaniac said:
Ok but school me on why all the Mesa amps if outfitted with Mesa tubes don't vary in spec from one model amp to the next enough to have the

Nevermind, here is Mesa's explanation from the link Gball posted.

Why should you only use MESA/Boogie® tubes in MESA amps?

MESA/Boogie’s business is designing and building high performance amplifiers. For this, tubes with a variance within a narrow range are required. We have a very sophisticated computer based tube testing system (nicknamed "Robotube") that matches and measures tubes over seven important parameters and technicians who add a few tests that only the human ear can measure. This insures we end up with only the tubes that meet our stringent demands.

Tubes don’t "draw" more or less bias. The way a bias supply is connected to a tube is akin to a dead end road, it just trails off to nowhere without really completing a circuit. It's a static voltage and regardless of what tube is in the socket or even if the tubes aren't plugged in at all, it doesn't change the bias voltage a bit. Since a bias supply needs to put out the right voltage and never vary, MESA amps are hard wired to the correct values and never need adjustment. And for more than 40 years, that's how MESA/Boogies have been built.

Time to change tubes? Just plug our tubes into any one of our amps and you're done. No tech needed. No bills and no worry about biasing. We only sell the tubes that meet the specifications required for our amplifiers.
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So a very narrow range of tubes that fit the bias range on the amps. Plus they color code the tubes for matching. Kinda brilliant.
Plus a slight variance is no big deal at all with bias.
 
chilipeppermaniac said:
Sapient, I was not belittling or saying your mind was inferior, or low in intelligence or anything.

I said low mind like thatbastarddon explained, low as in "down in the gutter" as in just my restating your term of "mind in the gutter" in different words.

Apologies, if my message was ill received. It was not my intention, I was and am still confused. Hence my message of not seeing the connection of tucks, a mind in risque, lewd, crude, in the gutter frame of thinking, and how it pertains to Ramo's amp and fx loop issues.

Sapient, in my defense, I think that absolutely no one in the forum has ever had a comment from me that was aimed at them in a derogatory fashion. I see 0 reason that I would have directed one specifically at you either. It was not and never will be my approach of ever making any rude or insensitive comments to or about anyone else in the forum.

My message in question was simply stating my confusion on the reason/ logic behind the Tucks post. Nothing personal.
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I don't want to leave you hanging on this post. You don't have to apologize - I've always liked you and everyone here ...I have 0 people that I personally have issues with from my end. I'm sorry and aware that not everyone is say ...adjusted to these "connections" that may serve as more of an inside joke to others. Furthermore if you never had to use Tucks it's probably for the better anyway not really knowing about it.

I however, do apologize to you and look high to the way you personally handled the matter. I got a little ...childish and again I'm sorry about that as well.
 
Sapient said:
I don't want to leave you hanging on this post. You don't have to apologize - I've always liked you and everyone here ...I have 0 people that I personally have issues with from my end. I'm sorry and aware that not everyone is say ...adjusted to these "connections" that may serve as more of an inside joke to others. Furthermore if you never had to use Tucks it's probably for the better anyway not really knowing about it.

I however, do apologize to you and look high to the way you personally handled the matter. I got a little ...childish and again I'm sorry about that as well.
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Sapient, I am glad to hear that things have smoothed over between you and me. I am also glad that any sense of detrimental consequences have been clarified and most of all, NO chance of you souring on the forum.

You may get a laugh out of this now, but almost as soon as I sent you the PM and posted things in here, did I see the " joke" in the Tucks post.

I was thinking AMP, you were thiinking : Rectum/ HAHA I totally missed the closeness of Recto and Rectum, hence the remedy being Tucks.
Good ONE!!!!
 
chilipeppermaniac said:
Sapient, I am glad to hear that things have smoothed over between you and me. I am also glad that any sense of detrimental consequences have been clarified and most of all, NO chance of you souring on the forum.

You may get a laugh out of this now, but almost as soon as I sent you the PM and posted things in here, did I see the " joke" in the Tucks post.

I was thinking AMP, you were thiinking : Rectum/ HAHA I totally missed the closeness of Recto and Rectum, hence the remedy being Tucks.
Good ONE!!!!
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Thanks, Chili. Hopefully you and Tucks never have to cross paths. :cheers:
 
Just got it back from tech and he said he cant do it what i'm asking...



about blowing fuse he said it was cheap speaker cable fault.... ( one at rehearsal ) I got new one ( ernie ball make) so that should stop blowing fuse...


But my biggest question is...., Why cant i activate FX loop with fx on/off button to have delay on which ever channel i want... setting back knobs on foot switch or assigning to which ever channel I want, it makes foot switch redundant....

he gave me schematics if needed i can post pics....

am i doomed not being able activate fx on/off with fx button without a mod ?
 
Ramo said:
Just got it back from tech and he said he cant do it what i'm asking...



about blowing fuse he said it was cheap speaker cable fault.... ( one at rehearsal ) I got new one ( ernie ball make) so that should stop blowing fuse...


But my biggest question is...., Why cant i activate FX loop with fx on/off button to have delay on which ever channel i want... setting back knobs on foot switch or assigning to which ever channel I want, it makes foot switch redundant....

he gave me schematics if needed i can post pics....

am i doomed not being able activate fx on/off with fx button without a mod ?
Click to expand...


Might be worth a call to Mesa customer service to describe what amp is doing, and what you want to do. See what they say.
 
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