Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: p2pAmps on May 19, 2016, 04:23:05 am
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To builders out there,
If you are on the fence about building a 6G15 reverb just do it. They are not real expensive to build and are super cool to have around. Doug's turret board and layout is awesome and very quiet as well. The pictures below are of my second unit and I am starting to get calls now to build more. I am also finding a lot of Nashville studios are liking these tube spring reverbs even though there are many plug ins and digital verbs in their arsenals.
My 2 Cents
Scaggs
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573a76563c44d88be687dd2a/1463449178560/IMG_6502.JPG?format=500w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573a76564d088e8be78ee22b/1463449178423/IMG_6503.JPG?format=2500w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573b110b859fd0f408ed5563/1463488781823/IMG_6505.JPG?format=2500w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573b110bc2ea51148b9780c8/1463488781825/IMG_6506.JPG?format=2500w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573b110c859fd0f408ed5566/1463488782727/IMG_6510.JPG?format=2500w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573b110cc2ea51148b9780e5/1463488782668/IMG_6511.JPG?format=2500w)
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573b110dc2ea51148b9780e8/1463488783174/IMG_6512.JPG?format=2500w)
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The 6G15 is really cool. Sooner or later you're gonna have to try the revibe. Takes cool to the moon.
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The 6G15 is really cool. Sooner or later you're gonna have to try the revibe. Takes cool to the moon.
Revibe is definitely on the list of projects to build. I'm gonna have a busy summer with a new band gig, my day job, amp builds/repairs, and helping my son Zack with his new 1987 Chevy R10 pickup... Lucky kid LOL...
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This is the one I built to match up with a Bassman that I built for my Son. Surf city here we come. Heck of a unit. Sluckey recommended that I build the revibe unit when we were discussing this build. Think that is what I would do if I had it to do over. Not much to add to the buld. Sorry, Pic is of the Basssman, they look the same as to the finish and style.
http://s1272.photobucket.com/user/macdillard1/media/DSC_0149-Copy_zps55f716d1.jpg.html (http://s1272.photobucket.com/user/macdillard1/media/DSC_0149-Copy_zps55f716d1.jpg.html)
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This is the one I built to match up with a Bassman that I built for my Son.
http://s1272.photobucket.com/user/macdillard1/media/DSC_0149-Copy_zps55f716d1.jpg.html (http://s1272.photobucket.com/user/macdillard1/media/DSC_0149-Copy_zps55f716d1.jpg.html)
Perfect combo. The one I just delivered is going with a Bassman I built as well...
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fc1e92a3360c2000b9cc9c/573cc3034d088e6937731474/1463599880278/IMG_3246.JPG?format=1000w)
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JM2CW - having the cores lined up this way is not the best recipe for avoiding stray EMF coupling between the cores.
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573b110b859fd0f408ed5563/1463488781823/IMG_6505.JPG?format=2500w)
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JM2CW - having the cores lined up this way is not the best recipe for avoiding stray EMF coupling between the cores.
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/573b110b859fd0f408ed5563/1463488781823/IMG_6505.JPG?format=2500w)
I'm glad you pointed that out. I mounted the trannies to the already drilled holes which I can of course drill my own. The 1st one I built was just like this and was really quiet but I think I will change this one like you pointed out.
Thanks for the heads up
Mike
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Gotta agree with the Revibe. Very cool, but I have a looper cause I still don't like running through it unless it is on.
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(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/573a76564c2f85bbe7986f6a/5749ec3bc2ea517f706179f6/1464462398475/IMG_6568.JPG?format=2500w)
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JM2CW - having the cores lined up this way is not the best recipe for avoiding stray EMF coupling between the cores.
With those transformers you may need to make a very close inspection.
I have a handful of transformers with the same stand-up channel mounting. One of these is a Fender reverb transformer, a couple are chokes, and one PT. When I looked very closely, the reverb transformer has its bobbin rotated relative to the others. So it's already at "90-degrees" even if the cores all face the same way; see picture below.
This is easier to notice in my case, because the reverb transformer is the only one of the 3 to have a metal cover over the bobbin (would have been easier to spot without that last metal cover, though). I'm also not saying the transformer/choke used in this case are like this, but wanted to point out the possibility.
So I'm guessing guess since the 6G15 in this case isn't humming, everything's probably alright. Coupling depends on orientation and distance, so perhaps each is okay in this case.
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JM2CW - having the cores lined up this way is not the best recipe for avoiding stray EMF coupling between the cores.
With those transformers you may need to make a very close inspection.
I have a handful of transformers with the same stand-up channel mounting. One of these is a Fender reverb transformer, a couple are chokes, and one PT. When I looked very closely, the reverb transformer has its bobbin rotated relative to the others. So it's already at "90-degrees" even if the cores all face the same way; see picture below.
This is easier to notice in my case, because the reverb transformer is the only one of the 3 to have a metal cover over the bobbin (would have been easier to spot without that last metal cover, though). I'm also not saying the transformer/choke used in this case are like this, but wanted to point out the possibility.
So I'm guessing guess since the 6G15 in this case isn't humming, everything's probably alright. Coupling depends on orientation and distance, so perhaps each is okay in this case.
This one really is quiet but on the next one I plan to do things a little different. New owner is very happy and using this latest unit with his 57 Tweed Deluxe...
(http://static1.squarespace.com/static/56fbe87462cd94ff6ec9d02c/56fc1e92a3360c2000b9cc9c/574c260d1bbee0675b4fc2ea/1464608273384/IMG_6586.JPG?format=500w)
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JM2CW - having the cores lined up this way is not the best recipe for avoiding stray EMF coupling between the cores.
With those transformers you may need to make a very close inspection.
I have a handful of transformers with the same stand-up channel mounting. One of these is a Fender reverb transformer, a couple are chokes, and one PT. When I looked very closely, the reverb transformer has its bobbin rotated relative to the others. So it's already at "90-degrees" even if the cores all face the same way; see picture below.
This is easier to notice in my case, because the reverb transformer is the only one of the 3 to have a metal cover over the bobbin (would have been easier to spot without that last metal cover, though). I'm also not saying the transformer/choke used in this case are like this, but wanted to point out the possibility.
So I'm guessing guess since the 6G15 in this case isn't humming, everything's probably alright. Coupling depends on orientation and distance, so perhaps each is okay in this case.
SO I moved the PT inside the chassis like you see on some reverb units, no effect. This thing is still silent. I do like it inside better I think to keep it father from the tank but noise is not an issue for me on this build so far. The next thing I want to try is a 6K6 vs a 6V6...