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Topic: tube |
Pat Heald
From:
Vinemont, Alabama
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Posted 13 Jun 2018 11:14 am |
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| Where can I buy a tube for black box? 12AU7A. |
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Jim Sliff
From:
Lawndale California, USA
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Posted 13 Jun 2018 1:27 pm
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If you use Google you'll get a bunch of sources. TubeDepot, TheTubeStore, KCA. Lord Valve and on and on...
_________________
No chops, but great tone
1930's/40's Rickenbacher/Rickenbacker 6&8 string lap steels
1921 Weissenborn Style 2; Hilo&Schireson hollownecks
Appalachian, Regal & Dobro squarenecks
1959 Fender 400 9+2 B6;1960's Fender 800 3+3+2; 1948 Fender Dual-8 Professional |
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Dan Kelly
From:
Boston, MA
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Posted 13 Jun 2018 3:27 pm
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eBay has quite a number of listings for both new and NOS. Also, Rick at Viva Tubes has never failed me. Contact him at:
1-866-229-6620
rick@vivatubes.com
_________________
blah, blah, blah.
Hey You Kids! Get Off My Lawn!
blah, blah, blah. |
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Jim Sliff
From:
Lawndale California, USA
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Posted 14 Jun 2018 1:24 pm
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Be VERY careful about buying tubes from eBay sellers. Very, very few use tube testers that supply enough voltage to determine suitability for guitar amp use, and many "NOS" tubes are good looking "pulls" tested on their low-voltage systems.
Buy tubes from reputable sources.
_________________
No chops, but great tone
1930's/40's Rickenbacher/Rickenbacker 6&8 string lap steels
1921 Weissenborn Style 2; Hilo&Schireson hollownecks
Appalachian, Regal & Dobro squarenecks
1959 Fender 400 9+2 B6;1960's Fender 800 3+3+2; 1948 Fender Dual-8 Professional |
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b0b
From:
Cloverdale, CA, USA
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Pat Heald
From:
Vinemont, Alabama
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Posted 14 Jun 2018 2:24 pm tube
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| Thanks everyone for the info!! |
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Jon Light (deceased)
From:
Saugerties, NY
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Posted 14 Jun 2018 2:30 pm
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Tube Depot also has a warranty -- 90 day for new tubes -- that is a good fall back against receiving a noisy, microphonic tube. Other dealers may, as well, but it is TD with which I am familiar. It also means that (presumably) they do indeed test the tubes as they say.
I don't know that I've ever seen Brad suggest much benefit from using NOS tubes in a BB. |
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Greg Lambert
From:
Illinois, USA
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Jim Sliff
From:
Lawndale California, USA
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Posted 17 Jun 2018 8:57 am
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| Quote: |
| You might want to check this out before you buy a tube.. |
Except he's not shopping for a 12AX7 - he's hunting for a source for a 12AU7. Same pinout but a much lower gain tube.
If a circuit is designed for a 12AU7 there's usually a reason for it, and a 12AX7 will usually have far too much gain.
_________________
No chops, but great tone
1930's/40's Rickenbacher/Rickenbacker 6&8 string lap steels
1921 Weissenborn Style 2; Hilo&Schireson hollownecks
Appalachian, Regal & Dobro squarenecks
1959 Fender 400 9+2 B6;1960's Fender 800 3+3+2; 1948 Fender Dual-8 Professional |
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Mitch Adelman
From:
Pennsylvania, USA
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Posted 17 Jun 2018 9:12 am
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I have a first generation old Black Box and have replaced the 12Au7 with different brands over the years.I have found this one to sound the best for my taste. Its been reliable so far and not microphonic like I had with the JJ's with warm nice tube sound.Had good luck with the electro harmonix as well but I prefer the sound of this one now! Plenty to choose from though.
https://www.thetubestore.com/tung-sol-12au7w-6189 |
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Brooks Montgomery
From:
Idaho, USA
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Posted 17 Jun 2018 9:24 am
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Hoping Brad Sarno will pipe in here on his recommendations.
Also, wondering what are symptoms of a bad tube in a Black Box: does it just crap out, or are there warning signs of degradation?
_________________
A banjo, like a pet monkey, seems like a good idea at first. |
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Greg Lambert
From:
Illinois, USA
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Posted 17 Jun 2018 6:22 pm
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| Jim Sliff wrote: |
| Quote: |
| You might want to check this out before you buy a tube.. |
Except he's not shopping for a 12AX7 - he's hunting for a source for a 12AU7. Same pinout but a much lower gain tube.
If a circuit is designed for a 12AU7 there's usually a reason for it, and a 12AX7 will usually have far too much gain. |
Going down the list shows the gain of each tube manufacture. The lowest is 1 { lower than the AU7 }. You can pick the gain and curves you want. |
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