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| Note: I have since updated the Re-Vibe below to incorporate the Tore T mod. |
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6G15/5G13 Reverb/Vibrato unit To Library page for Layout diagram, Schematic and Parts listing. |
| What is a 6G15/5G13 Reverb/Vibrato unit? It is a copy of Leo Fender's 6G15 standalone reverb circuit combined with the Vibrato circuit that was used on Leo's 5G13 Vibrasonic. These two circuits can be found in the Gerald Weber hip tube amps book on pages 154 and 382. |
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| I emailed Ted Weber and requested that he add one more hole for the extra RCA jack and move the power cord hole up a bit. |
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G = Ground wires from board to pot buss wire. A, B, C, D and + = Filter cap stages. |
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D = Filter cap stage. The connection lug for stage D is under the lamp assembly
in this photo. Main B+ = Main filter cap that is connected directly to the Positive terminal of the bridge rectifier. The negative of this filter cap is connected to the bridge rectifier negative terminal. The main filter cap is glued to the end of the chassis using clear silicon. I chose to put all of the filter caps inside the 6G15/5G13 Reverb/Vibrato unit instead of making a filter cap board and placing them all in a can on the back of the unit. Either way will work fine. You save a bunch of labor and some parts by putting them all inside the unit. If you wanted to use another brand of caps that were larger in size than the Illinois brand, you would probably have to use a cap can and build a cap board. |
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R1 and R2 = 100 ohm Heater circuit artificial center
tap resistors. They are soldered directly to the lamp terminals and then soldered to ground on the back of the Vibrato Speed pot. The green heater wires go from the power transformer, directly to the lamp assembly. The heater wires then leave the lamp and go to V5. From V5, the heaters are just run in a string from V5 down to V1. You can see the green heater wires in some of the other photo's. |
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Here you can see the RCA jack that I added for the Vibrato foot switch. You can also see the ground buss wire that is soldered down the back of the pot assembly. There are only two ground wires leaving the circuit board. They are both soldered to the pot ground buss wire. These are the big black wires in the photo above with a G next to them. |
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The Weber 6G15/5G13 Reverb/Vibrato chassis only comes with 3 RCA jack holes. I drilled a fourth hole to add
another RCA jack for the Vibrato foot switch. This lets you use a vintage style Fender foot switch to turn the reverb and Vibrato off and
on. This chassis was designed to use a 1/4 inch stereo jack foot switch assembly. You only need 3 holes for that arrangement. A Marshall style dual foot switch has a stereo 1/4 inch plug. Either method will work, depending on the foot switch assembly that you may already own. I think the vintage style Fender foot switches look cooler and many people probably already own one if they have a Fender combo amp. |
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6G15/5G13 Reverb/Vibrato notes: Thanks to Jeff Gehring for combining two of Leo's classic circuits and placing the combined schematic into public domain. The library page has links for the 6G15/5G13 Reverb/Vibrato schematic, parts list and layout diagram. Refer to the layout diagram to follow the notes below.
SH = Mini shielded cable. Misc. notes: If you intend on mounting your filter caps inside the chassis as I have done, you will need to mount the circuit board on 1/4 inch standoffs and very close to the tube sockets. This will give you more room under the pots to mount the caps. The 47/500v and 100/450v caps barely fit under the pots. I doubt that Sprague's will fit under the pots. You would have to build a filter cap can board and mount the caps on the rear of the chassis if you used physically larger filter caps. It was not necessary to bolt the bridge down to the circuit board. The bridge has four lugs surrounding it and once all four bridge wires are soldered to the lugs, the bridge will not move. The bridge wires are soldered to the lugs and the lugs are used to make the connections. You will have to decide where the two center circuit board mounting holes should go at the same time that you decide where you intend to bolt down the 022905 output tranny. Both sets of holes are in the same general area so some planning is needed. I bolted the green power cord ground wire to the circuit board mounting screw in the far right hand corner of the chassis. (pots facing toward you.) Even though a 3 wire power cord is specified, you will probably have to lift the power cord ground with a wall adapter. If you do not, you may end up with a ground loop since the guitar cord that goes from the 6G15/5G13 Reverb/Vibrato output jack to your amp already connects both chassis grounds. The power cord enters the chassis very close to the edge of the circuit board. I have made a suggestion to Ted Weber that he move this hole up a bit on future chassis. I have also suggested to Ted that he include four RCA jack holes on future chassis versions. It would be nice if the power switch on/off lettering were reversed on the chassis. This way the main filter cap could fit down under the power switch. As it stands now, a Carling on off switch intrudes into the lower part of the chassis right where I wanted to put the main filter cap. If the switch were reversed, there would be no problem putting a cap under the switch. |
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