| Redfoxfur |
| i'm looking to build a spring rever unit cab and all and was wondering if anyone had any usefull links on a step by step or a how to. i can get the reverb tank and i have a small 1 watt amp. I'm not realy sure whats involved any help would be apreciated thank you |
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| unclejed613 |
| mount the reverb spring in whatever position it was originally. they are made with the suspension springs in various positions to keep the tank suspended properly in one position only. i could explain how to modify the suspensions for various mounting positions, but i'd need one in front of me, and i don't have one in my parts collection. if you have good-to-excellent mechanical skills, it's not too hard to figure out. |
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| unclejed613 |
here's a breakdown of the part nimber system for reverb tanks:
Accutronics Reverb Tanks
Almost all the reverb tanks that one sees for sale are the Accutronics brand. They are made by:
Sound Enhancements, Inc.
185 Detroit St.
Cary, IL 60013
Although they make many models, the three types that are readily available are a limited number of their types 4, 8, and 9. The type 4 is 17" long and uses 2 long springs, each of which consists of two springs joined in the middle. Thus, Accutronics considers this model a 4-spring unit. This type was the original style selected by Leo Fender. The type 8 is 9" long and uses 3 springs. This type is most famous for its use by Marshall. The type 9 is 17" long and uses 3 long springs, each of which consists of two springs joined in the middle. Analogously, Accutronics considers this unit a 6-spring device. All Accutronics' part numbers consist of 7 characters as described below.
1st character: type 4, 8, or 9
2nd character: Input impedance @ 1kHz
Type | A B C D E F
4 | 8 ohms 150 ohms 200 ohms 250 ohms 600 ohms 1475 ohms
8 and 9 | 10 ohms 190 ohms 240 ohms 310 ohms 800 ohms 1925 ohms
3rd character: Output impedance @ 1 kHz
Type | A B C
4 | 500 ohms 2250 ohms 10000 ohms
8 and 9 | 600 ohms 2575 ohms 12000 ohms
4th character: Decay time
1 = short (1.2 to 2 sec)
2 = medium (1.75 to 3.0 sec)
3 = long (2.75 to 4 sec)
5th character: Connector arrangement
A = input grounded, output grounded
B = input grounded, output insulated
C = input insulated, output grounded
D = input insulated, output insulated
6th character: Locking device 1 = no lock
7th character: Mounting plane
A = horizontal,open side up
B = horizontal, open side down
C = vertical wall,long axis horizontal, connectors up
D = vertical wall, long axis horizontal, connectors down
E = vertical wall, long axis vertical, input up
F = vertical wall, long axis vertical, output up
The following table summarizes the above data for the most commonly available units:
PART NUMBER PRIMARY USER LENGTH NUMBER OF SPRINGS INPUT IMPEDANCE@ 1KhZ/DC
OUTPUT IMPEDANCE @ 1KhZ/dc
4AB3C1B Fender 17" 4 8ohms/.81ohms 2,250ohms/200ohms
4BB2C1B Acoustic/SLM/Ampeg 17" 4 150ohms/26ohms 2,250ohms/200ohms
4EB2C1B Peavey 17" 4 600ohms/58ohms 2,250ohms/200ohms
4FB3D1B Music Man General 17" 4 1475ohms/200ohms 2,250ohms/200ohms
9AB2C1B Fender/ Boogie 17" 6 10ohms/.81ohms 2575ohms/200ohms
9EB2C1B Peavey/General 17" 6 800/58ohms 2575ohms/200ohms
9FB2A1C General 17" 6 1,925/200ohms 2575ohms/200ohms
8AB2A1B Boogie 9" 3 10ohms/.81ohms 2575ohms/200ohms
8BB2A1B SLM 9" 3 190ohms/26ohms 2575ohms/200ohms
8DB2C1B Marshall 9" 3 310ohms/36ohms 2575ohms/200ohms
8EB2C1B Fender 9" 3 800ohms/58ohms 2575ohms/200ohms
if you know where the isolating springs go for each mounting position, you can change the mounting type (mounting plane). all you have to do is move the outside ends of the springs to the proper holes in the case. |
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