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Post by mootsie on Nov 12, 2008 10:57:14 GMT -7
I've never changed tubes on an amp before. What I've read is that you simply pull them straight up. I noticed that the Ghia has brackets on the tubes. Do I need to remove these to change the tubes?
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Post by Lefty on Nov 12, 2008 10:58:25 GMT -7
What amp are you using?
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Post by kruzty on Nov 12, 2008 11:06:43 GMT -7
Yes, remove the tube retainers (for the power tubes, you can just move the wire to the side). I've read, and this is what I do, that you should gently move the tube around in a circular motion as you are pulling out. This changes the pin angles enough so you an get around any "catches."
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Post by mootsie on Nov 12, 2008 11:07:25 GMT -7
Ghia
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Post by brad737 on Nov 12, 2008 11:11:16 GMT -7
Mootsie, Those are tube retainers. Their job is to retain the tube, so you must get them off first. Depending on which kind you have, you can either just slide it off the top, or move it to the side. Next, pull the tubes out straight out, while GENTLY rocking them in a small circular motion. They should come right out. When you insert the new tubes, make sure you have the pins lined up correctly, and just stick them back in. Don't do it too hard, or you may bend the pins. You'll be able to tell when they're seated well. Reattach the retainers and you're good to go. A couple of words of caution. Unplug the amp first. And make sure you wait awhile after having the amp on to swap tubes. Those suckers get HOT!
Good Luck, Brad
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Post by brad737 on Nov 12, 2008 11:12:11 GMT -7
Man, you're fast, Andy.
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Post by BW on Nov 12, 2008 11:23:16 GMT -7
Also be careful putting the retainers back on the tube, and make SURE the 'U' shaped bend in the wire at the bottom (where the wire hooks onto the socket) doesn't get bent up under a tube and short any pins out. Happened to a bud of mine, kept blowing the fuse 'til we put our readin' specs on and found it....
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Post by brad737 on Nov 12, 2008 11:28:12 GMT -7
Buddy, You're a pretty good second banana. You'd be a pretty good technician when those preamp tubes get noisy.
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Post by kruzty on Nov 12, 2008 11:33:17 GMT -7
Man, you're fast, Andy. Well, it's good to have confirmation that what I'm doing is right. Or we're both wrong... ;D
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bakaliano
New Member
'Madness is like a gravity'
Posts: 8
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Post by bakaliano on Nov 14, 2008 15:12:15 GMT -7
Hi guys, I desperately need your help. Today I was swapping rectifier tube in my maz18 (it was my first time). I put new tube in the socket, turned the power on and the tube wasn't working/glowing (previous tube was glowing but there was no sound, that's why I decided to change tube). I pulled it off and I saw a little piece of metal attached to one of the tube's pin. I put tube back in socket, pulled it out and another piece of metal was attached to another tube's pin. Did I destroyed socket? What can I do now??? BTW, pins on the tubes are numbered but holes in the socket don't have numbers. How should I put recto tube? I'm so ignorant.... Help!!! Did I ruined my amp? ??
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Post by brad737 on Nov 14, 2008 20:06:31 GMT -7
It sounds to me like you didn't have the rectifier tube aligned correctly when you stuck it in. (They have a little alignment groove to help.) To me at least, it sounds like you jacked up the tube socket. Not a very expensive repair, nor that time consuming. But I'd recommend that you definitely don't play it until a tech checks it out.
Good Luck, Brad
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bakaliano
New Member
'Madness is like a gravity'
Posts: 8
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Post by bakaliano on Nov 15, 2008 2:55:59 GMT -7
It sounds to me like you didn't have the rectifier tube aligned correctly when you stuck it in
Thanks Brad737, guess you're probably right. Today I will call my friend who's technician. But still I'm worring; I love my Maz and it's sound dead. And what if blowing 1/2 amp fuse wasn't caused by defective rect. or power tube (I've changed all tubes)?
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