What does matter is the current and transconductance. Spring reverb drive amp gearslutz pro audio community. Reverb tanks cabinets vacuum tubes speakers tolex and tweed grillcloth transformers test equipment vacuum tube accessories chassis baffles adhesives glues capacitors resistors turret eyelet boards back panels cabinet hardware amplifier kits bias testers faceplates knobs capacitor kits covers logos pilot lights pots reverb accessories reverb tanks capacitor. The amp was missing the reverb tank when i got the amp so i dont know what it sounded like before, but it sounded great when i got the tank in the amp. Caline digital reverb pedal guitar effects pedal true bypass with aluminum alloy housing cp26 snake bit, black. The reverb tank should be isolated from vibrating surfaces as much as possible. To start with, the way that a reverb circuit is implemented is slightly different between tube and ss versions. I think the longdecay version, the 8eb3c1b, lasts too long, but that may be a. Revisit reverb tank, 17 long, 2 spring, equivalent to accutronics 4ab3a1b. Belton reverb tank, 17 long, 2 spring, 4ab3c1b, current production. Reverb tank accutronics, 4ab3c1b, long decay, 2spring. The first clue it would not, the tank was in backwards meaning somebody had it out already.
It was also obvious that this magnetism was reduced the farther my screw driver was moved toward the righthand end of the reverb tank. Antique electronic supply makes no claims, promises, or guarantees about the accuracy, completeness, or adequacy of the contents of this article, and expressly disclaims liability for errors or omissions on the part of the author. You might want to look at the radial tank driver to get something that has more adjustments. We do not offer any other shipping methods through our reverb store at this. So the reverb driver s z out can be equal to or greater than the tank s z in. Accutronics 4bb3c1b reverb tank accutronicsbelton reverb tanks 4bb3c1b is used by fender in the original blues deville 4 x 10. Differential amp tone control drive stage tank recovery. Mod 4eb3c1b long decay reverb tank for fender new in the. Installation involved nothing more than a phillips screwdriver and patience. Tank is in excellent clean shape as you can see in the pictures. Changed one for a friend, and he really liked the sound. Used in the gibson ga30rv, ga60rv and vox ac30tbr vintage top boost reverb 19911993. I have bought many amps of different manufactures for low price because of a dead reverb.
It is recommended that the driver be a current or voltage source with an output rising 6. Reverb tank was a pull from a vintage lowrey organ. This is a great upgrade at a minimal price and effort. If it is an open in the tank, try the full size 4eb2or3c1b. Thanks for looking in and happy bidding original 1965 gibbs spring reverb tank pan unit. Accutronics products and specifications amplified parts. Accutronics 4db2c1d reverb tank accutronicsbelton reverb tanks 4db2c1d is commonly found in marshall amplifiers with vertical.
For vintage blackface and silverface twin reverb, pro reverb, super reverb, vibrolux reverb, etc. So i bought this one thinking it would be easy too. The reverberation effect is created when an audio signal created by a transducer is sent through one or more springs, the movement of the springs is then converted back into an audio signal by another transducer at the other end, creating the unique sound. This amp had lived a hard life before i got it, and this was a great way to get the stock reverb, with true analog spring tank sound, back and working like it left the factory. Watford valves amp parts accutronicsbelton reverb tanks. Revisit reverb tanks bringing back the sound of vintage accutronics tanks. Revisit reverb tank, 9 long, 3 spring, equivalent to accutronics 8eb3c1b. I was a able to find the photofact for the reverb unit that came with my stereo, and i have some questions.
If you want to stay with the long decay reverb, then the mod 8eb3c1b would be the mod tank for that application. From the schematic floating around online, this amp has a reverb driver transformer with an 8 ohm secondary. Carvin vintage 16 accutronics 8gb2c1b fender stratocaster. Accutronics 4ab3c1b reverb tank accutronicsbelton reverb tanks 4ab3c1b is the reverb tank that was used in nearly all the great fender amplifiers from 1963 on. Accutronics 4bb3c1b reverb tank accutronicsbelton reverb tanks 4bb3c1b is used by fender in the original blues deville 4 x 10 combo fender part number 0020489000. New mod reverb tank, 9ab3c1b long 3 spring long decay. The mod reverb tanks are high quality upgrade units. New mod reverb tank, 8eb3c1b short 3 spring long decay. For the reverb slot, you need a 12at7 there to meet specs. Accutronics products and specifications antique electronic. Accutronics reverb tanks amp parts banzai music gmbh. The 12at7, while lower gain, puts out 15ma of current, the 12ax7 is 1.
However, the decay time is fixed because, as brad mentions above, this is a mechanical device. I once put a 5751 1ma in the driver slot in my maz 18 reverb and the reverb pretty much disappeared. Reverb tank mod, 9ab3c1b, long decay, 3spring antique. The reverb driver tube is a 12at7 that uses both of its triodes in parallel to operate as a singleended one stage amp. My only complaint is that this tank has female connections for rca.
In lieu of going with the 3 spring, i went with this 2 spring long decay. Mod reverb tank, 8db2c1d short 3 spring medium decay. Im considering putting a mojo 4ab2c1b same tank, shorter decay in the amp. But, i will say this, the reverb driver is not a gain stage so the 12at vs.
This is the one mod reverb tank that is actually fully line level. I found some simple circuits on the accutronics website. In reality, we can have a power driver or a current driver, because with a power driver current is amplified as well. This is the standard tank used in fender amps which as also use reverb driver transformer with an 8 ohm secondary. Kalamazoo amplifiers which used a driver transformer for the reverb input side. The circuit looks relatively easy to build, however, the photofact does not tell me what reverb tank to use. Jan 25, 2016 as i stated above, i used the mod 8eb2c1b tank. These mod tanks got high marks from a few forums i read, but some people claimed it wasnt as stock sounding and didnt vary much past about 3 or 4 on the dial. Fender deluxe 90 fender princeton 65 fender sidekick reverb 35 pn 025269 fender stage series fender ultra choru. Replacement for all fender 6g15 tube reverb models made 19631965 and the reissue 63 reverb. Reverb tank part numbers consist of a seven digit code, i.
If youre a reverb user, this is very much a worthwhile mod for these amps, as the blue tanks in these amps are just a very poor selection. Ive used a jj and a vintage 12at7 in the amp with the same results. Eminence legendca1032 10inch bass guitar driver 200w. Equivalent to 4eb3c1b, designed to sound like vintage tanks. By the time the signal gets to the end of the reverb tank, it is transformed. Input impedance 8 ohms, output impedance 2250 ohms, long decay 2. They always had a wire off or something one even had a spring off one corner so it was arcing on the tank. Perfect replacement or upgrade your ampreplacement reverb tank for 8eb3c1bsolid, sturdy constructionshort 9. Maybe its a mechanicalvibration thing, i did use a bag to mount the full size tank.
Thanks for looking in and happy bidding original 1965. With a tube version, the reverb driver is actually acting like an output tube. Note that the information presented in this article is for reference purposes only. The reverb is not only useable throughout the knobs range, but it sounds very nice. This should be adjusted by ear to sound best with the particular reverb tank you are using. Even though your tank came in a marshall head, it may have been manufactured by accutronics if not, you may find that yours matches or is very close to the specs of one of theirs. So did the late usa made accutronics tank that i put in my 67 super reverb, the original tank in my 68 princeton reverb and the imported 3 spring tank accutronics, if i recall in my mesa express. Built the stage center as a stand alone unit with the spring reverb tank inside it was a pedal that is about 35 cm long by 15 cm high and. Monoprice 15 watt tube amp page 3 telecaster guitar forum. Antique radio forums view topic homemade reverb amp questions. This tells you that 8eb2c1b, is a medium decay, and 8eb3c1b is a long decay. These tanks are designed to replicate the sound of vintage reverbs and are great replacements. It now has more of a fender feel i really like it glad i upgraded.
I also replaced the accutronics blue reverb tank with a belton bs3eb3c1b reverb tank, that i had left over from my ac15c1. Dont expect it to sound like a high priced vintage fender amp. Most spring reverbs are made from accutronics or are copies of this old standby. This has a great reverb sound that intensifies as you crank it up. Todays video is part 3 of our series on spring reverb tanks. Try the mod kits the wave a diy tubedriven spring reverb unit. Direct fit and replacement for my fender performer combo. Use this guide to help you determine part number based upon your specifications and application. Reverb tank 9ab2c1b fender 3 spring medium delay allparts uk. There are a number of different types of reverb tanks available. Primarily used by all fender amplifiers with tube reverb from 19631990. I am looking to build a driver with line level input and output for a accutronics type 4 spring reverb pulled from a hammond organ.
Yes, the speaker magnet was also trying to take the driver out of my hand, but i was amazed that the reverb tank had such a powerful magnetic force. Each digit in the part number represents a specification. The driver for the tank is a 6c4 rc coupled to the tank. The item youve selected wasnt added to your basket. You can view our followup spring reverb tank comparison video. If you are referring to 8eb2c1b and 8eb3c1b, the only difference is the 4th character. Im currently designing a new drive amp for my accutronics reverb tank since ive learnt a little bit about electronics. Spring reverb tanks are used to create a unique reverberation effect in guitar amps and organs. Avoid mounting the outer channel of the reverb tank directly to the mounting surface by using grommets, rubber standoffs, reverb tank bag and liner or other products designed for mechanical isolation. Dec 14, 2016 to start with, the way that a reverb circuit is implemented is slightly different between tube and ss versions. My reverb tank went out on my fender blues jr, so i was looking for a replacement.
Try the wave a diy tubedriven spring reverb unit from mod kits. Fender blues deluxe deville, marshall jcm 2000 dsl o. I bought the mod 9eb2c1b reverb tank to replace the korean made reverb tank in my fender blues deville reisssue 410. I too dont understand why the jr has so many reverb problems, many other manufactures use ss reverb drivers with great success. Tsl 60 tsl 122 laney 50w 100w, vc30, lionheart series input dc resistance. The only goofy thing i had was the inputoutput cables on my amp were backwards from what was on the tank, but that is probably the amp and not the tank. Ac15c1, and im wondering what the difference is between the 8eb2c1b 8eb3c1b in this regard. Type 4, 600 ohm input, 2,250 ohm output, long decay, 2 spring. I was also pleasantly surprised that the mounting holes were cut exactly the same as the original and able to reuse the plywood base the original was on without making new holes in it.
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