1962 Fender Reverb Tank going in and out

CaliforniaMaxx Joined: Dec 05, 2010 Posts: 132	Posted on May 17 2015 07:31 PM Been having problems with my 1962 Fender Reverb Tank. It keeps going in out, meaning that it goes from sounding really really bright to really really dull. Any idea what could be causing this? Any help would be greatly appreciated. Thanks. Top
Badger Joined: Nov 16, 2013 Posts: 4537 Wisconsin	Posted on May 17 2015 08:21 PM CaliforniaMaxx wrote: Been having problems with my 1962 Fender Reverb Tank. It keeps going in out, meaning that it goes from sounding really really bright to really really dull. Any idea what could be causing this? Any help would be greatly appreciated. Thanks. Over what space of time does this "rally bright to really dull" thing happen? Just some days, or shorter periods like really bright when you started playing but then gets dull as you continue? Need a bit more info, really. A tube (or part of one) is an easy thing to rule out. However, the small number of tubes in a tank have very interactive (and sometimes multiple) roles. — Wes SoCal ex-pat with a snow shovel DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices. Top
CaliforniaMaxx Joined: Dec 05, 2010 Posts: 132	Posted on May 17 2015 08:24 PM It sounds dull for most part, but will go back to sounding bright for a couple seconds before sounding dull again. Top
Badger Joined: Nov 16, 2013 Posts: 4537 Wisconsin	Posted on May 17 2015 10:26 PM The brief interval when its functioning makes me wonder if it's not something vibration-related that, when it does act correctly, that act sends it back to sounding dull. Maybe a tube socket that needs re-tensioning or simply an RCA cable (and its socket) that have oxidation on them over time? If you have a spare tube for the 12AX7 slot (1/2 takes care of mix & 1/2 takes care of tone) you might swap that. Also, if you have some Deoxit you can clean the cable connects. A little on a Q-tip can do the plug and its shell; a pipe cleaner with Deoxit on it works great for the inside of the RCA sockets on the pan if it's maybe old & just been sitting there doing its thing for a long time with the cables never being changed or moved. Again, a little goes a long way, then give the RCA plugs a little twist back & forth as you put them back in, helps the cleaning process. Several other things could be in play but those are easy to rule out. It could be a transducer in the pan or something else, but first things first. (Note the block diagram of what handles what at the SG101 Wiki, link in my sigline.) Off to crash to the sound of Big Tiki Dude's NSSR show. Maybe some of the really knowledgeable vampires will wander by. — Wes SoCal ex-pat with a snow shovel DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices. Top

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1962 Fender Reverb Tank going in and out