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Post by Marshalldog on Mar 24, 2017 12:24:06 GMT -7
What do you Z Experts think of the JAN-GE 12AX7WA as pre-amp tubes in the Maz 18 NR? I just popped in three of them and I think I like it but I need to crank it up and I cant right now. I think for me its between the Tube Store 7025's and these as my favorites. Anyone else use them in this amp??
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Post by baldeagle on Jul 22, 2017 0:24:26 GMT -7
Yet another update:
The NOS 6N14N power tubes failed after just 6 months! I honestly have not played it that much: maybe 10 gigs plus home play. I have the Master at 3pm, V at 10, with the Brake-lite at 4 at home and 2 live. It died while I was playing it with the EQ bypassed and a fuzz pedal with fuzz maxed and unity output.
I swapped the JJ EL84s back in and was immediately reminded that I don't like the tone in this amp. Harsh sounding to me. I have a Carvin Vintage 16 with the Hasserl mods including the variable EQ bypass and JJs. With the Master dimed and the EQ bypassed 75%, the JJs sound really good.
I love the Maz with the NOS tubes, so I ordered another set and I am hoping it was just a random bad tube.
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Post by premiumplus (Dave) on Jul 23, 2017 5:56:02 GMT -7
Tubes...I spent nearly $100 on a NOS RCA rectifier and it just failed in my Maz 18 yesterday. I decided to just get the best so that I wouldn't have to worry about the rectifier for a good long time. The pisser is that I've had the tube for over 6 months but I got about 20 hours use out of it. Naturally it happened after it was too late to get any warranty, so I ate it. Again. Tubes...I really love them and I hate them too.
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Post by zpilot on Aug 3, 2017 22:02:53 GMT -7
The stock Russian power tube in my new MAZ 8 failed fairly early. I know I didn't have 150 hours on it. I didn't worry about it too much because there is only the one power tube in that amp so it's not expensive to replace it and other folks seem to be having better luck. I have another, which I got from perryr, in there now and we'll see how that goes. Honestly, at the price we are paying for that Russian tube, if I get 300-400 hours from them consistently I will be happy.
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Post by dcarver on Aug 3, 2017 23:34:36 GMT -7
That's one of the cool things about the Maz 8... besides how good it sounds. Being single ended, it doesn't hurt too bad when you have to replace an output tube.
You'll probably get a lot more life out of the new 6n14n. I've been running on my stock 6n14n for about a year now. Still sounds great.
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Post by baldeagle on Jan 13, 2018 18:10:32 GMT -7
Another update: almost exactly 6 months since my last post, the NOS 6N14N power tubes red-plated again while playing with the EQ bypassed. V & MV both at 1:30, using attenuator to keep the volume to a household level. I use the EQ bypass ~15% of my playing time.
At this point I'm not sure if it's the tubes, the EQ bypass, or the combo of the two that is causing the failures.
Has anyone else experienced power tube failure using the EQ bypass?
And any suggestions for alternates to those tubes?
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Post by dcarver on Jan 13, 2018 23:13:01 GMT -7
Hi baldeagle. Good to see you back on the forum.
I use my EQ bypass about 40% of the time with my Maz 8. I don't think the EQ bypass would be the cause of output tube failure. I'm still using the original 6n14n that came with my amp. I have over 1200 hours on it with no problems.
Did you get the tubes from Perry R.? I don't have any direct experience with other 6n14n tubes, but I've heard his are different from the ones sold by the Tube Store and other retailers.
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Post by purpletele on Jan 14, 2018 4:53:26 GMT -7
Another update: almost exactly 6 months since my last post, the NOS 6N14N power tubes red-plated again while playing with the EQ bypassed. V & MV both at 1:30, using attenuator to keep the volume to a household level. I use the EQ bypass ~15% of my playing time. At this point I'm not sure if it's the tubes, the EQ bypass, or the combo of the two that is causing the failures. Has anyone else experienced power tube failure using the EQ bypass? And any suggestions for alternates to those tubes? baldeagle, The attenuator will shorten the life of the power tubes. That's the cost/benefit tradeoff for that bedroom setting.
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Post by digs57 on Jan 14, 2018 8:59:53 GMT -7
All tube are subject...all
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Post by baldeagle on Jan 14, 2018 12:48:24 GMT -7
Hi baldeagle. Good to see you back on the forum. I use my EQ bypass about 40% of the time with my Maz 8. I don't think the EQ bypass would be the cause of output tube failure. I'm still using the original 6n14n that came with my amp. I have over 1200 hours on it with no problems. Did you get the tubes from Perry R.? I don't have any direct experience with other 6n14n tubes, but I've heard his are different from the ones sold by the Tube Store and other retailers. I bought the tubes from Doug's Tubes. I am messaging with Perry R. to find out if they are the same as his.
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Post by baldeagle on Jan 14, 2018 12:51:59 GMT -7
Another update: almost exactly 6 months since my last post, the NOS 6N14N power tubes red-plated again while playing with the EQ bypassed. V & MV both at 1:30, using attenuator to keep the volume to a household level. I use the EQ bypass ~15% of my playing time. At this point I'm not sure if it's the tubes, the EQ bypass, or the combo of the two that is causing the failures. Has anyone else experienced power tube failure using the EQ bypass? And any suggestions for alternates to those tubes? baldeagle, The attenuator will shorten the life of the power tubes. That's the cost/benefit tradeoff for that bedroom setting. I am running the V and MV at 1:30 with the attenuator. I could understand the tube life being shortened significantly if I had them dimed, but they are far from it. And the # of hours is pretty low: < 200.
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Post by dcarver on Jan 14, 2018 14:22:39 GMT -7
Hi baldeagle. Good to see you back on the forum. I use my EQ bypass about 40% of the time with my Maz 8. I don't think the EQ bypass would be the cause of output tube failure. I'm still using the original 6n14n that came with my amp. I have over 1200 hours on it with no problems. Did you get the tubes from Perry R.? I don't have any direct experience with other 6n14n tubes, but I've heard his are different from the ones sold by the Tube Store and other retailers. I bought the tubes from Doug's Tubes. I am messaging with Perry R. to find out if they are the same as his. I just compared one of my spares from Perry to the picture of the 6n14n available on Doug's Tubes. Perry's look a lot different. Edit : Just want to clarify. The spares tubes I got from Perry don't look anything like the pair of tubes pictured on Doug's site. However, they do look more like the single tubes pictured. But they don't have the EB after the 6n14n. BTW, I was looking at this page on Doug's site : www.dougstubes.com/power-tubes/nos-6n14n-eb.html
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Post by baldeagle on Apr 9, 2018 23:10:33 GMT -7
I bought a set of tubes from Perry and the amp failed 2 hrs before a gig. I scrambled to buy and install a set of EL84s. That convinced me that there must be something wrong with the amp. I took it to Mike & Mike's Guitar Bar near me in Seattle. Great shop, specializing in old guitars and amps. When the amp tech opened it up it was obvious: he could see scorching under one of the resistors. When he touched it with his finger it fell apart into 3 pieces. I'd attach a photo but I can't figure out how.
I had brought him all the blown tubes including Perry's, and he tested them. It turned out Perry's and several others were fine. BTW, Perry is a great guy to deal with: he was very responsive throughout the process. I highly recommend him.
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Post by dcarver on Apr 10, 2018 12:24:09 GMT -7
Hey baldeagle, glad to hear you finally got the problem sorted out. You're right, Perry is great guy to deal with. Excellent source for all kinds of NOS glass.
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