Vacuum tube reverb circuits traditionally have used a lowimpedance reverb tank coupled to the driver tube by a small output transformer. If the amplifiers connection to the reverb tanks phono jack shell is not at ground potential, it is. 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. Reverb tank accutronics, 8eb2c1b, medium decay, 3spring.
Note that the information presented in this article is for reference purposes only. Reverb is such an important part of an amps sound and there is nothing worse than a broken or faulty reverb tank and they are simple to replace and just not that expensive. The original hammond accutronics tanks from the 1960s were also wired directly to their respective rca. So does anyone know or have tried swapping 8eb2c1b for 8gb2c1b i think the 8e goes in the blues jr. Revisit reverb tank, 9 long, 3 spring, equivalent to accutronics 8eb2c1b. These tanks are readily available as a spare for the fender blues junior amp both here in australia and os. In 2011 i published a schematic for a little spring reverb driver based on. Designed for applications in which the overall sound quality is important and a compact package is required. Accutronics reverb tanks amp parts banzai music gmbh. Reverb tank, accutronics, 4ab3c1b, long decay, 2spring.
Im not sure if it will definitely work but the first tank i would try is the 4ab3c1b. Kalamazoo amplifiers which used a driver transformer for the reverb input side. Everything i know about spring reverb music thing modular notes. We do not offer any other shipping methods through our reverb store at this. This reverb pan is a common replacement for some fender, peavey, and music man amplifiers. This tank is used on a peavey classic 100 valve amp and it was reported as no reverb. Accutronics 8eb2c1b reverb tank accutronicsbelton reverb tanks 8eb2c1b is used in the fender blues junior and is also used by fender in the, ri champ. Three spring, medium decay, input impedance of 800 ohms, output impedance of 2575 ohms, 9. Nov 12, 2017 everything i know about spring reverb. Accutronics reverb tank, 8eb2c1b newoldsounds reverb. Code 8eb2c1b, pulled from an early 1990s fender super 112 tube amp. See explanation of accutronics reverb tank numbering system here. 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.
Vintage accutronics specifications list the following delay times per spring. Beltonaccutronics reverb tank, 8eb2c1b short 3 spring medium decay. From the schematic floating around online, this amp has a reverb driver transformer with an 8 ohm secondary. Worth the few extra bucks, accutronics is the classic longspring reverb sound. Testing an accutronics reverb hi folks, newby hear. This unit is much more sensitive than the stock unit so i keep it mostly at 23 and maybe go to 5 for deeper reverb sounds but never get close to 710 range. Reverb tank accutronics, 8eb2c1b, medium decay, 3spring short 3 spring tank, medium decay, 800. See a chart which lists ac impedance and dc resistance measurements for reverb tanks here. The type 8 is the higher quality version of the type 1. Vintage accutronics specs recommend insulating both input and output connectors and grounding the tank chassis separately. I replaced the original accutronics reverb tank in my 1967 princeton reverb with this one.
Current production accutronics reverb tank made by belton. This type was the original style selected by leo fender. Accutronics roots date back to 1984, when luis pedroso founded qualitronics, in lowell, ma. Replacement for all fender 6g15 tube reverb models made 19631965 and the reissue 63 reverb. This is the standard tank used in fender amps which as also use reverb driver transformer with an 8 ohm secondary. The mod reverb tanks are high quality upgrade units. So the reverb driver s z out can be equal to or greater than the tank s z in. Just been reading the thread regarding testing a reverb tank and thought i would share my recent experience with a very odd reverb fault on an accutronics 8eb2c1b tank.
Stereo spring reverb, tape echo, what analog fx are worth the. Ce distribution 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. But that is not the only way to drive a reverb tank using a vacuum tube, and in fact it is not the best way. If the reverb in your amplifier no longer works and you suspect the reverb tank itself is the issue, you can test the tank with an ohmmeter by doing the following. By the time the signal gets to the end of the reverb tank, it is transformed. The reverb tank should be isolated from vibrating surfaces as much as possible. Watford valves amp parts accutronicsbelton reverb tanks. Accutronics 8eb2c1b reverb tank accutronicsbelton reverb tanks 8eb2c1b is used in the fender blues junior and is also used by fender in the, ri champ, ri deluxe, ri princeton. In reality, we can have a power driver or a current driver, because with a power driver current is amplified as well.
This is a short tank 9 12 with a triple spring set. Spring reverb tanks explained and compared amplified parts. Thus, accutronics considers this model a 4spring unit. Reverb tank accutronics, 4ab3c1b, long decay, 2spring. The lamington reverb a better valve reverb unit valve heaven. Although the original tank still worked and tested within spec, it was noisy and weak even with new cables, tubes, full recap, etc. Excellent quality and perfect sound,4 second decay time accurate and slight treble increase as expected from longspring tanks. Revisit reverb tanks bringing back the sound of vintage accutronics tanks. I need to mount my accutronics reverb tank in my 1x10 combo amp. The stock replacement tank is the accutronics 8eb2c1b.
Made for high quality reverb sound but mindful of small spaces. Have now completed the lamington reverb and pretty happy with it. Accutronics small spring reverb tank for intellijel springray. Accutronics products and specifications antique electronic. And finally some short demos with the specified 3 spring 8eb2c1b tank, just to give an idea of what it sounds like. 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. Unlike some tanks, revisit reverb tanks include the soft mounting grommets to acoustically decouple the outer channel from the amplifier cabinet.
Carvin vintage 16 accutronics 8gb2c1b fender stratocaster. Comparison between the stock accutronics and a mod reverb tank. Replaced mod tank that was selfoscillating due to the second spring vibrating continuously. Evatco has sourced a wide range of reverb tanks and even a few digital reverb units which are quite good to use. Amplified parts 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. If you like long, surfy reverb and darker reverb tone, the belton and mod tanks available from antique electronics are functionally similar to the ruby tank, which was just a relabeled belton tank. Accutronics products and specifications ce distribution. It is recommended that the driver be a current or voltage source with an output rising 6 dboctave with increasing frequency. The tank is accutronics 8gb2c1b the second digit only goes to e on all the code charts. Check the resistance of the reverb tank s output using an ohmmeter. Accutronics products and specifications amplified parts. I found a tank in germany but not worth the price plus shipping and conversion to us dollars.
Some of the major differences between the mods and other reverb tanks are that the transducers are wired directly to their respective rca jacks as opposed to current production tanks where transducers are connected by a detachable plug to their respective rca jacks. Disconnect your reverb cables from the amplifiers chassis. Managed from a startup to a 160employee company, qualitronics was acquired by msl in 2000. The black art of reverb steve carr explains circuits and troubleshoots common problems duration. The type 9 reverb uses six counter wound and coupled springs that are placed in parallel. Replacement for fender blues junior and other solid state driven reverb circuits. A transformerless constantcurrent reverb driver introduction. Just without the reverb up at all on 0 it makes the tone noticeably clearer and punctual.
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