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Post by villageidiot on Jul 4, 2006 4:28:34 GMT -7
I got a pretty much brand new Maz 18 Jr off of eBay, and it sounds fine, but when I look in the back a few of the tubes are not lighting up.
All of them look fine except for the ones that are surrounded by a metal-looking cylinder. The 5 with metal jackets are all not lighting up except for the middle one.
Is this a problem? Do the others come on when I'm playing or is something wrong here? Like I said, it sounds fine, and is plenty loud.
Thanks.
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Post by mike33 on Jul 4, 2006 6:29:11 GMT -7
Do they not lighting up at all, or you can not see them because the metal-looking cylinder (tube shields) are still turned over the tubes or they not glow bright? In my Maz Jr. I only can see if the tubes are lighting up when it's quiet dark in the room. Probably you have to remove the tube shield first. What I noticed is that not all of the tubes glow bright in the same way. And I have changed my tubes a few days ago, so quiet new ones! As I know this is not an issue you have to be worry about. Myles wrote something about in an other post about it: drzamplifiers.proboards41.com/index.cgi?action=display&board=xperts&thread=1137175216&page=11#1151093069I assume that the tubes are lighting up, because if they wouldn't (especially the 1st and 2nd one as well V5) you wouldn't write "it sounds fine, and is plenty loud"! But I can be wrong about it! Let's wait what Myles is telling us!
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Post by billyguitar on Jul 4, 2006 7:32:10 GMT -7
You can remove the tube shields. I usually take the off of every amp. Never had a tube come loose yet in 35 years.
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Post by chipstar75 on Jul 4, 2006 19:07:25 GMT -7
The metal cylinder is called a"tube shield". Myles or Mike...back me up on this....removing the tube shields from your amp, will ,in some amps provide a noticable change in tone. This is due to the fact that the tube shields provide not just a barrier to physically harming a tube, but also an electronic barrier , shieding the tube from the radiation ,if you will, from each other.It is for theat reason, I've been advised that it is more desirable to leave the tube shields in place. Kinda like the difference between the "swimming pool" routing used by Fender on many strats, to save time and money, one large swimming pool lookin hole was routed for the three singlecoils to sit into. vintage strats had individual holes for each pick up. It is believed that the seperate cavitys provided magnetic shielding between each pick up , providing a better tone. ok..Im gettin offf the track. Try it for yourself, with and without, and see if you can here a difference ! chip
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