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| | |-+  Adding a Standby Switch to the Lightning
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Author Topic: Adding a Standby Switch to the Lightning  (Read 1713 times)
dmac252
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« on: June 04, 2012, 05:04:08 PM »

Has anybody considered adding a standby switch to a Lightning or know how it would be done
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wyatt
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« Reply #1 on: June 04, 2012, 10:40:59 PM »

Wouldn't bother.

Standby switches are there for one purpose, so you can take a break during a gig and not have to adjust your volume control. If you need that, it's the only reason to consider adding it. That's why you'll find Standby's only on guitar amps, not radios or stereos, you can pay $10K for a McIntosh tube stereo and there is no Standby on it.

The myth about it preserving tube life is just that, a myth. In the early '70's, some sap misinterpreted information about massive 50,000-watt broadcast tubes and his poor assumption has been repeated ever since. And, even it it weren't a myth (it is), your GZ34 has a slow ramp up, so it takes a while for the B+ to get to full voltage anyway.

What is not a myth is that GZ34 tubes and Standby's don't go well together, which is one of the reasons Nik added those backup diodes at the rectifier socket on all of his layouts.
« Last Edit: June 05, 2012, 08:57:00 AM by wyatt » Logged
dmac252
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« Reply #2 on: June 05, 2012, 09:44:01 AM »

Thanks for the info. I was only concerned because digging through the mountain of opinions and such regarding the lightning the statement that continues to show itself is that the nature of the lightning is that the tubes run hot and should not be left for too long without input ( i assume playing ) Not sure that that statement in and of itself makes a whole lot of sense  when I think about it. Just though I would consider the standby switch and see what others have done or what they thought about the idea.  This forum seemed to be the best place to pose the question

Thanks Again


Has anybody considered adding a standby switch to a Lightning or know how it would be done
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wyatt
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« Reply #3 on: June 05, 2012, 10:53:44 AM »

Why would you leave it on without playing it? Turn it off and save on your electric bill.  

The modifier of not leaving it on "without input" is misdirection. The amp is running hot while playing too. It just means that whenever the amp is on, you wearing down the tubes; when you aren't using the amp, turn it off

EL84's run hot...that's the downside of miniature tubes with small surface area....poor cooling. Add to the the Lightning's Class AB1, cathode-bias design compounds the issue.

If heat is an issue, and you have space, what use use on an EL84 design is this; it is called a "tube cooler" and it has the added benefit of dampening vibration.


A rare exception when you wouldn't want to amp to cool off is recording in a studio...the amp tone changes slightly as the tubes arm up over the first 30 minutes or so, this is neither fast enough nor dramatic enough to note by ear...but once you try and mix guitar parts that were recorded before the amp was warmed up completely with those later in the session, there is a difference.  But...guess what? Warmed up means off Standby with the tubes running and you playing.

If you want a Standby or have a need for one...then it would not be hard to install one.
« Last Edit: June 05, 2012, 11:07:29 AM by wyatt » Logged
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