Rocket w/ Reverb

[martin manning]

V3a and b are tied together and at 270

Do you mean pins 6 and 1 are tied together? That shouldn't be.

Yes that is what I have. It appears that way on the layout so I thought it was correct. The grids and cathode are tied too. I thought that was the recovery tube for the reverb. I could be way off

I realized that you changed the tube numbers from the schematic... It's be easier if you called the driver V8, so all of the others would be as drawn. The recover stage is the previously unused V2b, is it not?

[RJ Guitars]

My meter has lead me down the wrong path on a couple occasions before I figured out the battery was dying...

[M Fowler]

Make sure the B5 is connected to the 100k off pin 1 V2 and 220k off pin 6 on V1.

B4 goes to 100k tied to pin 1 V1/pin 7 V2 and onto pin 6 V2

B3 goes to the pair of 100k/100k in phase inverter section.

Make sure the pair of 220k/220k in phase inverter go to ground.

[amplifiednation]

I realized that you changed the tube numbers from the schematic... It's be easier if you called the driver V8, so all of the others would be as drawn. The recover stage is the previously unused V2b, is it not?[/quote]

whoops, sorry about that.

[martin manning]

V2a's plate (pin 1) should be the same voltage as B+4, and it's not... something is wrong there. Also, V1a's plate (pin 1) is near ground at 3V, same area, so look there for a wiring error. The big current draw is from B+4, not B+3 (PI), again pointing to a wiring error around V1a/V2a.

[angelodp]

I also tested the 9k1 resistors that I removed. They had 14.77 ohms. I'm not sure how else I can test them...or if that is even correct, but it's consistent across all of the resistors.

I'm still getting a huge voltage drop from B2 to B3.

Are you saying that your 9k1 resistors are reading 14.7 ohms ?? Thats a problem if so.

[M Fowler]

Just a suggestion if you want to fill in the blanks voltages on the attached voltage chart so we can identify the problem areas.

I don't know about the rest of the guys but I am lost on the voltages your getting?

[martin manning]

I agree, Mark, but the "V" numbers have to match the schematic or we'll still be confused. I guess the new reverb driver tube should be called V9 instead of V8 like I suggested above; that's already taken by the rectifier. I'm pretty sure the problem is a wiring error around V1a and V2a per my edited post above.

[M Fowler]

Taylor here is my voltage chart

[amplifiednation]

Do you mean pins 6 and 1 are tied together? That shouldn't be.

Yes that is what I have. It appears that way on the layout so I thought it was correct. The grids and cathode are tied too. I thought that was the recovery tube for the reverb. I could be way off

I realized that you changed the tube numbers from the schematic... It's be easier if you called the driver V8, so all of the others would be as drawn. The recover stage is the previously unused V2b, is it not?

Fixed my post. Sorry for the confusion.

[martin manning]

I'm still looking at V2a's plate being 55V when it's supposed to be connected directly to B+4, which is 83V.

[XgamerGt03]

I'm still looking at V2a's plate being 55V when it's supposed to be connected directly to B+4, which is 83V.

I wonder if V2b is being used as the cathode follower. Its plate is at 82V in this case. I can't see the pictures while I'm here at work but you may want to check to see if that is the case. I don't see what would cause it to be 55V unless he has a resistor soldered to the wrong place.

[amplifiednation]

I'm still looking at V2a's plate being 55V when it's supposed to be connected directly to B+4, which is 83V.

I wonder if V2b is being used as the cathode follower. Its plate is at 82V in this case. I can't see the pictures while I'm here at work but you may want to check to see if that is the case. I don't see what would cause it to be 55V unless he has a resistor soldered to the wrong place.

I got dragged away from the build for the night. I feel like I want as accurate as I need to be on the voltage measurements. Mark sent me a chart that I will fill out tommorrow.

Thank you all so much for your help. This community is amazing and full of some great knowledge. I can't wait to get this figured out so I can start adding value to the forum

[XgamerGt03]

It looks to me like you are in fact using v2b for the cathode follower. Have you checked your reverb transformer? Also, if you remove that specific tube and leave all of the others in what happens to the voltage?

I see you said that you stepped away so those are some ideas for when you work on the amp next.

[martin manning]

I'm still looking at V2a's plate being 55V when it's supposed to be connected directly to B+4, which is 83V.

I wonder if V2b is being used as the cathode follower. Its plate is at 82V in this case. I can't see the pictures while I'm here at work but you may want to check to see if that is the case. I don't see what would cause it to be 55V unless he has a resistor soldered to the wrong place.

Yes, that looks like the case, and V2a and b appear to be wired correctly, but, the cathode resistor on V2b doesn't look like 56k.