Super Reverb Build Problems

[bnwitt]

You need to focus on V4 and V5 and all of the wires that go to them. Verify that every one is exactly correct. I'm staring at your pictures but I can't tell what is what due to all of the white wiring. That 220k reistor I mentioned should have a B+ wire coming from a 20uf capacitor in the cap can which is connected on the opposite end of it's connection to the tremolo 0.02 capacitor but i can't tell if it does. Study the Fender layout in the area of V4 and V5 for proper connections and proper component values.

[loudthud]

According to the schematic I'm looking at, V4 side B looks fishy. Are pin 3 and 8 connected together? Pin 8 looks like either it's not connected to anything or a really big cathode resistor. It might read 6.5V if it is not connected to anything. Your meter completes the circuit causing the reading. Ohm to ground and see what you get.

Troubleshooting is a learned skill. When you connect your meter to a point in a circuit and the meter reads 0.000V that doesn't mean there is no voltage at that point, it means the voltage is Zero. Subtle difference. If it is shorted to ground, it would read 0.000V. Is it supposed to be connected to ground? Check your schematic. Ohm it to ground with the power off. This is the process of troubleshooting.

[mjenki14]

Good News! Working vibrato channel and reverb! but..... no vibrato yet. You all were both right, the problem was in v4. Pins 8 and 3 were bridged, but the connection at pin 8 was cold soldered and not secure. I soldered that correctly and it started working like a charm! I'm gonna go back to work and find my mistake on the vibrato section. I appreciate you all putting up with me and the learning process! Sorry bnwitt, I had forgotten about the second chart you posted with the typical values last night, I was pretty brain dead from a long day of work. I see now my voltages were incorect. Off to work on it a little more!

[bnwitt]

Way to go Loudthud. I've been working with him for days on this problem making voltage charts for him to use and analyzing his pictures ad nauseum and you make the duplicate post that gets him to click the thank you post button. It must be my style that is wanting. I'll let you help him the rest of the way. It seems to be a waste of my time. I guess I could have just left him to the posters that kept telling him it was in his output section but my good natured personality prevented it. I've learned my lesson though. No more help to newbies that don't pay attention or are willing to work hard for resolution. Good luck Mj. You're gonna need it.

[mjenki14]

At the junction of the 0.02 tremolo capacitor and the wire to V5 pin 1 there is a resistor that should be 220k ohms. That would be red, red yellow bands on the resistor. Is that what you have there?

Yes there is a 220k resistor there. On one side of the resistor is the +460v B+ wire, and the other is the capacitor and a lead going to pin 1 of v5. On the other side of the 220k resistor, the voltages measure 452. I checked the resistance from the B+ junction and pin 1 of v5 and it read 220k. I'm keep prodding though.

[mjenki14]

Way to go Loudthud. I've been working with him for days on this problem making voltage charts for him to use and analyzing his pictures ad nauseum and you make the duplicate post that gets him to click the thank you post button. It must be my style that is wanting. I'll let you help him the rest of the way. It seems to be a waste of my time. I guess I could have just left him to the posters that kept telling him it was in his output section but my good natured personality prevented it. I've learned my lesson though. No more help to newbies that don't pay attention or are willing to work hard for resolution. Good luck Mj. You're gonna need it.

bnwitt! I sincerely appreciate your help! you were definitely right the entire time about the problem with the layout. I was always looking for the mistakes, it was just frustrating not being able to find it.

Again, thank you for your help.

Michael

[loudthud]

I don't know if its been mentioned before and I really don't want to read this thread again but the tremolo is disabled unless a footswitch is plugged in. You can temporarily install a shorting wire at the footswitch jack if you don't have a footswitch. If there is a big negative voltage, -50V or so, at one of the pins on the tremolo tube, it's disabled.

[mjenki14]

Thank you! I had no idea about that! I though it worked like the reverb. Everything is running great! I can't thank everyone enough for their help! I will stop bugging everyone now