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bruce egnater
New member
I thought the reverb is working?
shimmilou
Member
If it ain't broke..............you can probably still fix it. 
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Anonymous
Guest
it's not. quit working again on me. i checked all the wires, tried different tubes, etc, etc.
trying to figure out how to determine if it's the driver transformer.
trying to figure out how to determine if it's the driver transformer.
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Anonymous
Guest
ok, anyone able to help me with this?
even with the type of reverb transformer that is in the amp?
if i have the amp kinda loud, the reverb is verrrrrryyy faint. veeeeeeeeeeeeeeeerrrry faint.
please if you can, read the topic from top to bottom too. it's pretty frustrating that it quit working again.
even with the type of reverb transformer that is in the amp?
if i have the amp kinda loud, the reverb is verrrrrryyy faint. veeeeeeeeeeeeeeeerrrry faint.
please if you can, read the topic from top to bottom too. it's pretty frustrating that it quit working again.
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Anonymous
Guest
crickets still?
man i wanna get this fixed....it's bumming me out.
man i wanna get this fixed....it's bumming me out.
shimmilou
Member
Not sure how the reverb driver is wired in an Egnater amp, and I'm basing this on a typical reverb driver circuit in many other amps, but I would expect pins 1 and 6 (Plates for tube) to both have DC voltage. It appears that you have missing voltage for pin 1. Since you measured voltage at pin 6, this indicates that the reverb transformer primary isn't open at least, so the transformer might be OK since both Plates might be supplied through it. Maybe still a poor connection somewhere, maybe even a bad solder joint. From what you've said, it does appear to be an intermittent problem, indicating a poor connection somewhere.
I would really look closely again at the place that you found the loose connector before, the problem just might be in that same area.
I would really look closely again at the place that you found the loose connector before, the problem just might be in that same area.
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Anonymous
Guest
cool...at least that helps narrow it a bit...from what i gather (self educated)...i'm going to follow pin1 circuit board trace and check all the plugs again...
unless the intermittency is just the Revert trans crapping out, then im probably wild goosing.
unless the intermittency is just the Revert trans crapping out, then im probably wild goosing.
shimmilou
Member
I would say that an intermittent transformer is not likely, although certainly not impossible. Typically, when most any transformer fails, it will either be an open (primary or secondary), or it smokes, not much in between. See if both pins 1 and 6 are connected to the reverb transformer primary. The supply for both Plates in the same tube, would typically come from the same supply in most any circuit, and for the reverb driver tube Plates, the supply would come through the reverb transformer primary.
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Anonymous
Guest
will do!
i forgot to mention, playing the amp tonight, on pretty loud volumes...the reverb is there on every channel...its just REALLY faint....also, again, if i tap the reverb pan, it makes the signature crashing noise.
i preciate the info my friend!!! i'll post here when i investigate further.
i forgot to mention, playing the amp tonight, on pretty loud volumes...the reverb is there on every channel...its just REALLY faint....also, again, if i tap the reverb pan, it makes the signature crashing noise.
i preciate the info my friend!!! i'll post here when i investigate further.
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Anonymous
Guest
ok. so, i did everything i could...traced pin 1 as far as i could, metered it as far as i could to. checked EVERY connection in the amp (after draining caps). STILL nothing. reverb is very faint on high volumes when reverb knob is full on, and, again, pan still crashes if i tap on it.
shimmilou
Member
OK, checking the tube functions on the Tourmaster listing on the site, V6 is listed as reverb drive and recovery, must be half of the tube for each (I should have checked the site first). That means that pins 1 and 6 should both have a DC supply voltage. Can you determine which one of the pins (1 or 6) connects to the reverb transformer primary? I am thinking that one of the pins is supplied through the reverb transformer for the driver side of tube, and in this case the other pin has a separate supply for the recovery side of the tube. Which supply is missing? This is difficult without schematics. 
http://www.egnateramps.com/Products/Tourmaster/Tourmaster4100Specifications.html#Secondary
http://www.egnateramps.com/Products/Tourmaster/Tourmaster4100Specifications.html#Secondary
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Anonymous
Guest
im not sure man....i can tell you which pins go to which colored wires from trans, but, maybe this is where someone from egnater would chime in.
shimmilou
Member
Yes, that would be great, and they probably already know what's wrong. 
It wouldn't surprise me if they already have a new part on the way to you.
Are the reverb transformer wires red, blue, green and black? If so, does the red or blue wire connect to pin 1 or pin 6, or neither?
Since the recovery side of the tube is working, evidenced by the crash sound, I would guess that pin 6 is the recovery side, and it's DC supply is present. It seems then that the driver side of the tube is the one missing voltage at pin 1. That is where I would expect to see the supply voltage from the reverb transformer, pin 1. Check for DC voltage on the red wire and blue wire of the reverb transformer. It might be that your initial thought about the transformer being faulty was correct. Have you checked the resistance across the red and blue wires?
It wouldn't surprise me if they already have a new part on the way to you.Are the reverb transformer wires red, blue, green and black? If so, does the red or blue wire connect to pin 1 or pin 6, or neither?
Since the recovery side of the tube is working, evidenced by the crash sound, I would guess that pin 6 is the recovery side, and it's DC supply is present. It seems then that the driver side of the tube is the one missing voltage at pin 1. That is where I would expect to see the supply voltage from the reverb transformer, pin 1. Check for DC voltage on the red wire and blue wire of the reverb transformer. It might be that your initial thought about the transformer being faulty was correct. Have you checked the resistance across the red and blue wires?
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Anonymous
Guest
man, i really appreciate you helping me.... here's a few quick pics i took with the phone.
black and green come up from one side of the reverb trans to the board
red and blue the other, and they both go to the rca pin closest to the reverb trans.
i'm going to mess with it more later and maybe check the reverb pan itself again...even though i think that's a dead end.
again, i appreciate all the help my friend!
black and green come up from one side of the reverb trans to the board
red and blue the other, and they both go to the rca pin closest to the reverb trans.
i'm going to mess with it more later and maybe check the reverb pan itself again...even though i think that's a dead end.
again, i appreciate all the help my friend!
Attachments
shimmilou
Member
That helps, thanks. Even though I'm still figuring out the circuit myself.
From the pictures, it looks like the red and blue wires are the ones going to the reverb tank, while the green and black are to the supply and tube? Is that right? Well of course it would be reversed from what I thought it would be.
You could check the resistance between the green and black wires to see if open. And then check for DC voltage on the green wire and then the black wire. Can you see if either the green or black wire connects to pin 1 of V6? (connects through the circuit board of course)
From the pictures, it looks like the red and blue wires are the ones going to the reverb tank, while the green and black are to the supply and tube? Is that right? Well of course it would be reversed from what I thought it would be.
You could check the resistance between the green and black wires to see if open. And then check for DC voltage on the green wire and then the black wire. Can you see if either the green or black wire connects to pin 1 of V6? (connects through the circuit board of course)
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Anonymous
Guest
ok
pin 1 goes to the black wire.
im not sure where the green wire goes after being fed in from the rev trans.
since i have the green and black wires each soldered onto their respective connection spades, i can't remove them right now to check for continuity...hooked into the circuit, as is, there is NOT continuity..but, that's to be expected right?
also, just so you know, up top of this pic, the wire circled red is the one being fed from the bottom rca plug from the reverb tank (circled yellow).
pin 1 goes to the black wire.
im not sure where the green wire goes after being fed in from the rev trans.
since i have the green and black wires each soldered onto their respective connection spades, i can't remove them right now to check for continuity...hooked into the circuit, as is, there is NOT continuity..but, that's to be expected right?
also, just so you know, up top of this pic, the wire circled red is the one being fed from the bottom rca plug from the reverb tank (circled yellow).
Attachments
shimmilou
Member
Cool! Then the DC voltage for pin 1 comes from the reverb transformer black wire. If there is no voltage on pin 1 of V6, check for voltage where the black wire connects to the circuit board, then check for voltage where the green wire connects to the circuit board. This is just tracing back to find where the pin 1 supply is lost. If there is voltage on the green wire and not the black, verify the resistance between the green and black wires.
Edit:
Just realized that you said you have no continuity from green to black, that means that the reverb transformer is open. And if the transformer were good, it would still show continuity even in the circuit. I think you've got it and your initial suspicion was correct.
Verify that you have voltage on the green wire and not the black. Want to be sure that the supply is good.
Edit:
Just realized that you said you have no continuity from green to black, that means that the reverb transformer is open. And if the transformer were good, it would still show continuity even in the circuit. I think you've got it and your initial suspicion was correct.
Verify that you have voltage on the green wire and not the black. Want to be sure that the supply is good.
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Anonymous
Guest
shimmilou":1v51rwke said:Edit:
Just realized that you said you have no continuity from green to black, that means that the reverb transformer is open. And, it would still show continuity even in the circuit. I think you've got it and your initial suspicion was correct.
Verify that you have voltage on the green wire and not the black. Want to be sure that the supply is good.
i will do so shortly
hang tight my friend!
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Anonymous
Guest
shimmilou":2rcozn3d said:Cool! Then the DC voltage for pin 1 comes from the reverb transformer black wire. If there is no voltage on pin 1 of V6, check for voltage where the black wire connects to the circuit board, then check for voltage where the green wire connects to the circuit board. This is just tracing back to find where the pin 1 supply is lost. If there is voltage on the green wire and not the black, verify the resistance between the green and black wires.
Edit:
Just realized that you said you have no continuity from green to black, that means that the reverb transformer is open. And if the transformer were good, it would still show continuity even in the circuit. I think you've got it and your initial suspicion was correct.
Verify that you have voltage on the green wire and not the black. Want to be sure that the supply is good.
voltage on green. voltage at connection without green wire on where it would go.
no voltage at black, or at the connection.
no continuity betwen green and black when both are unconnected.
shimmilou
Member
That is open primary all right. Are the green and black wires the ones that were loose before?
What is the voltage on the terminal where the green wire connects? I would expect a DC voltage similar to what you have on pin 6, or it could be higher. The DC supply then for pin 1, is from the circuit board terminal to the trans green wire, through the trans primary, and out of the trans to the black wire to its terminal, and from the black wire terminal through the circuit board to the tube pin 1 terminal.
All this, and you knew to begin with. But, troubleshooting is best to be certain of the problem.
Verify the DC supply at the green wire terminal.
Why do I get the feeling that Bruce is watching and enjoying seeing me flounder?
What is the voltage on the terminal where the green wire connects? I would expect a DC voltage similar to what you have on pin 6, or it could be higher. The DC supply then for pin 1, is from the circuit board terminal to the trans green wire, through the trans primary, and out of the trans to the black wire to its terminal, and from the black wire terminal through the circuit board to the tube pin 1 terminal.
All this, and you knew to begin with. But, troubleshooting is best to be certain of the problem.
Verify the DC supply at the green wire terminal.Why do I get the feeling that Bruce is watching and enjoying seeing me flounder?